CN111206422B - A kind of dry antistatic spandex spinning oil and preparation method thereof - Google Patents

Abstract

The invention discloses a dry-method antistatic spandex spinning oil agent, which consists of a composite high-temperature smoothing agent, a composite antistatic agent, a phenol-based antioxidant, a phenylamino antioxidant, an olefine acid antioxidant, a high-temperature dispersing agent, a softening agent, an environment-friendly emulsifier, a metal stearate, a preservative and a defoaming agent, wherein the composite high-temperature smoothing agent is formed by compounding hydrogenated paraffin-based base oil, hydrogenated naphthenic base oil and methyl silicone oil. The invention also provides a preparation method of the dry-method antistatic spandex spinning oil agent. The invention ensures that the spandex spinning has excellent antistatic property under different humidity conditions, and is suitable for the high-speed spinning process requirements of spandex denier yarns with various specifications. The invention has good smoothness, excellent high and low temperature resistance, excellent yellowing resistance, and good dispersion and isolation performance to spandex.

Description

A kind of dry antistatic spandex spinning oil and preparation method thereof

technical field

The invention belongs to the field of chemical industry, and relates to a dry-process spinning oil, in particular to a dry-process antistatic spandex spinning oil and a preparation method thereof.

Background technique

Polyurethane elastic fiber, which is our conventional abbreviation "spandex", is called as an indispensable "MSG-like" textile raw material in the modern textile and garment industry due to its excellent elasticity and good comprehensive properties. Elongation and breaking strength can be used for all fabrics that require good elastic recovery rate, so it has a good development prospect with high application value. Spandex spinning processes mainly include dry spinning, melt spinning, wet spinning and reaction spinning, etc. Among them, the output of dry spinning reaches 80% of the total output of spandex in the world, which is the main spinning method, and its typical representative is INVISTA The company's Lycra fiber and Bayer's Dorlastan fiber.

In 2019, the total output of spandex in my country was about 850,000 tons. From 2013 to 2019, the compound annual growth rate of domestic spandex production capacity was 6.63%, and the production capacity has a tendency to further increase. As the output of spandex continues to increase, the output of spandex spinning oil will also increase accordingly. Spandex oil is oiled through the nozzle or roller to form a protective film on the surface of the spandex fiber to prevent the adhesion between the silk and the silk. A good spandex oil can make the yarn spun after oiling the spandex yarn have good smoothness, bundling, and antistatic performance. , non-stop wire, no slip edge.

At present, the companies that produce spandex oil mainly include the American Galston Company, Japan's Takemoto Oil Company and Matsumoto Oil Company, and domestic companies such as Shandong Dayi, Beijing China Textile Haitian Ningbo Xike and other companies. Although there are many companies producing spandex spinning finish at home and abroad, and there are many varieties and specifications of finish, there are always some irreconcilable problems. During the use of the process, there are sagging edges, broken wires, poor unwinding between the internal energy and the outer layer, and slow unwinding speed. As described in patent US3717575, the spandex spinning oil is composed of single mineral oil, silicone oil and amino-modified silicone oil. The characteristics of this kind of oil are that the spun spandex yarn feels good and smooth, but it has a fatal shortcoming. That is, the antistatic performance is poor during use. The patent CN101525788 is to mix polydimethylsiloxane and phosphate as an antistatic agent and add it to the spinning dope, so that the product has antistatic properties, but it uses a large amount of raw materials, high cost and complicated process, which is not easy to use. Conducive to practical application promotion. The patent CN106521965B uses a large amount of dimethyl silicone oil as a smoothing agent and graphene, which has an antistatic effect to a certain extent, but the disadvantage is that the cost is greatly increased, which is also not conducive to promotion. Patent CN104372446A uses quaternary ammonium salt cationic surfactant as antistatic agent to be added into oil agent, which has certain antistatic performance, but it is prone to defects such as sagging, broken wire and poor unwinding performance in later use, and it cannot be completely Meet the needs of the actual spandex spinning process.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a kind of dry antistatic spandex spinning oil and preparation method thereof, and the dry antistatic spandex spinning oil and preparation method thereof should solve the problem that the oil in the prior art is The antistatic performance of the spinning process is generally poor, and the spandex yarn has technical problems such as sagging and broken filaments during the use of the subsequent process, poor unwinding between the internal energy and the outer layer, and slow unwinding speed.

The invention provides a dry-process antistatic spandex spinning oil, which is composed of a composite high temperature smoothing agent, a composite antistatic agent, a phenolic antioxidant, an aniline antioxidant, an alkenoic acid antioxidant, a high temperature dispersant, a soft agent, environment-friendly emulsifier, metal stearate, preservative and defoamer, and the composite high-temperature smoothing agent is composed of hydrogenated paraffin base oil, hydrogenated naphthenic base oil and methyl silicone oil;

In the dry process antistatic spandex spinning oil, the weight percentage of the hydrogenated paraffin base oil is 45% to 55%, and the weight percentage of the hydrogenated naphthenic base oil is 15% ~25%, the weight percentage of the methyl silicone oil is 5% to 10%, the weight percentage of the composite antistatic agent is 4% to 8%, and the weight percentage of the phenolic antioxidant is 0.5% %～1%, the weight percentage of the aniline antioxidant is 0.2%～0.5%, the weight percentage of the alkenoic acid antioxidant is 0.2%～1%, the weight percentage of the high temperature dispersant is 0.5% to 2%, the weight percentage of the softener is 1% to 2%, the weight percentage of the environment-friendly emulsifier is 2% to 6%, and the weight percentage of the metal stearate is 1% to 2%. 0.1% to 0.3%, the weight percentage of the preservative is 0.1% to 0.5%, the weight percentage of the defoamer composition is 0.1% to 0.5%, in the hydrogenated paraffin base oil , 65%>Cp>56%, in the hydrogenated naphthenic base oil, 50%>Cp>42%, Cp refers to the number of carbon atoms in the long-chain and branched-chain saturated hydrocarbons in the base oil. The percentage of total carbon atoms in the backbone.

Further, the kinematic viscosity of the hydroparaffinic base oil at 40°C is 10-18 mm ² /s.

Further, the kinematic viscosity of the hydrogenated naphthenic base oil at 40° C. is 10-20 mm ² /s.

Further, the methyl silicone oil is dimethyl silicone oil with a kinematic viscosity of 1000-1200 cSt (centiStokes) at 40°C.

Further, the composite antistatic agent is composed of the first component, the second component and the third component, and the weight ratio of the first component, the second component and the third component is 1: 1:2, the first component is a mixture of octadecyldimethylhydroxyethyl quaternary ammonium nitrate and ethylene oxide, or the first component is an alkylamine and epoxy. The mixture composed of ethane; the second component is higher alcohol polyoxyethylene ether phosphate potassium salt or isomerized alcohol polyoxyethylene ether phosphate potassium salt; the third component is composed of polyether silicone oil and It is composed of isomeric alcohol polyoxyethylene ether, and the weight ratio of the polyether silicone oil to the isomeric alcohol polyoxyethylene ether is 1:1.2.

Further, the preparation process of the composite antistatic agent is to weigh the first component, the second component and the third component according to the weight ratio, first heat the third component to 40-60 ° C, and then The first component and the second component are added in sequence, and after being fully stirred, a composite antistatic agent is obtained.

Further, the phenol-based antioxidant is a liquid polymer methyl bisphenol-based antioxidant 2,6-di-tert-butylphenol, or 4,4-methylbis(2,6-di-tert-butyl phenol) phenol), or 2,6-di-tert-butyl-p-cresol, either or a mixture of both.

Further, the aniline antioxidant is liquid octyl-butyldiphenylamine.

Further, the alkenoic acid antioxidants are docosapentaenoic acid and docosapentaenoic acid.

Further, the high temperature dispersing agent is any one or a mixture of two polyisobutylene polysuccinimide and polyisobutylene succinimide.

Further, any one or a mixture of both of the softener polyether-modified silicone emulsion and amino-modified silicone emulsion.

Further, the environment-friendly emulsifier is a mixture of any two of polyether polymer compound, linear fatty alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, and lauric acid polyoxyethylene ester.

Further, the metal stearate is a mixture of any two of barium stearate, magnesium stearate, zinc stearate and calcium stearate.

Further, the mixture of the preservative imidazole compound and carboxylic acid amine salt, imidazole compound and boric acid amine salt.

Further, the defoaming agent is any one or a mixture of the mixture of tributyl phosphate and methyl siloxane.

Further, the present invention also provides a method for preparing the above dry antistatic spandex spinning oil, comprising a step of preparing a hydroparaffin base oil with 65%>Cp>56% and a step of preparing a 50%>Cp>42 % of the hydrogenated naphthenic base oil, after the above two steps are completed, weigh the hydrogenated paraffin base oil, hydrogenated naphthenic base oil, methyl silicone oil, composite antistatic agent, phenolic Base antioxidants, aniline antioxidants, alkenoic acid antioxidants, high temperature dispersants, softeners, environmentally friendly emulsifiers, metal stearate, preservatives and defoaming agents, while weighing the refined clay, the described The weight of the refined clay is hydrogenated paraffin base oil, hydrogenated naphthenic base oil, methyl silicone oil, compound antistatic agent, phenolic antioxidant, aniline antioxidant, alkenoic acid antioxidant, high temperature dispersion agent, softener, environment-friendly emulsifier, stearic acid metal salt, preservative and antifoaming agent 2% to 6% of the total weight, and then add hydrogenated paraffin base oil, hydrogenated ring base oil to the first reactor Alkyl base oil and methyl silicone oil, then heated to 110 ℃ ~ 130 ℃ temperature, then add refined clay, and at the same time carry out stirring and refining adsorption for 30 ~ 60min, until the adsorption reaction is uniform, the precipitate is filtered by a filter and then pumped into the second After cooling to 50 ℃ ~ 70 ℃, the environment-friendly emulsifier and stearic acid metal salt are added and stirred evenly, and then compound antistatic agent, phenolic antioxidant, aniline antioxidant, alkenoic acid antioxidant are added. Oxygen agent, high temperature dispersant, softener, preservative and defoamer are added to the second reaction kettle, stirred evenly, and cooled to obtain dry antistatic spandex spinning oil.

Further, the first and second reaction kettles are treated with vacuum pump circulating vacuum negative pressure 0.75-1.0KPa for 1-3 times.

Further, in the step of preparing 65%>Cp>56% hydroparaffinic base oil, firstly, the fractions of alkanes, monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons and unsaturated chain hydrocarbons are used as raw materials, and the Hydrorefining, the fraction of the unsaturated chain hydrocarbons accounts for 30-90% of the raw material by weight, the reaction pressure of the reactor in the hydrorefining process is 4-12MPa, and the reaction temperature is 250-340 ℃ , the total inlet space velocity is 0.2~0.55/h, the volume ratio of reaction hydrogen to oil is 650~850, the space velocity relative to the hydrotreating catalyst is 0.4~0.75/h, and the space velocity relative to the hydrorefining catalyst is 0.6~1.75/h , the catalyst in the hydrorefining process is Ni-W/AL ₂ O ₃ , or Ni-Mo-W/AL ₂ O ₃ , or Ni-Mo-Co/AL ₂ O ₃ , followed by normal and reduced pressure Distillation, the vacuum distillation process is that the residual pressure is 1-55 mmHg, and the distillate oil at the normal pressure of 200-280 ° C is cut to obtain a hydroparaffinic base oil with 65%>Cp>56%.

Further, in the step of preparing 50%>Cp>42% naphthenic base oil, firstly, the fractions of alkanes, monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons and unsaturated chain hydrocarbons are used as raw materials, and the Hydrorefining, the fraction of unsaturated chain hydrocarbons accounts for 40-80% of the raw material by weight, the reaction pressure of the reactor in the hydrorefining process is 4.5-12MPa, and the reaction temperature is 230-330°C , the total inlet space velocity is 0.25~0.55/h, the volume ratio of reaction hydrogen to oil is 650~900, the space velocity relative to the hydrotreating catalyst is 0.35~0.8/h, and the space velocity relative to the hydrorefining catalyst is 0.5-1.75/h , the catalyst in the hydrorefining process is Ni-W/AL ₂ O ₃ , or Ni-Mo-W/AL ₂ O ₃ , or Ni-Mo-Co/AL ₂ O ₃ , followed by normal and reduced pressure Distillation, the vacuum distillation process is that the residual pressure is 1-55 mmHg, and the distillate oil at the normal pressure of 220-320 ° C is cut to obtain a naphthenic oil with 50%>Cp>42%.

Further, the refined clay is activated clay with an activity greater than 180 mmol/kg.

The present invention makes full use of 65%>Cp>56% aromatic hydrocarbon hydrogenated paraffin base oil, 50%>Cp>42% aromatic hydrocarbon hydrogenated naphthenic base oil and methyl silicone oil when compounded in proportion. Flash point and low temperature performance, minimize the proportion of aromatic hydrocarbons with low flash point in high temperature smoothing agent, effectively exert the advantages of their respective structures, and improve the high temperature resistance of the smoothing agent. High temperature-resistant smoothing agent is the most abundant component, not only to ensure the appropriate friction coefficient between fibers and fibers and other contact parts of machinery, but also to ensure the smooth progress of spinning and drawing.

Composite antistatic agent is one of the important components in spandex spinning oil. In the previous domestic spinning oil, fatty alcohol polyoxyethylene ether phosphate and fatty alcohol phosphate are commonly used as antistatic agents. Such antistatic agents are only In the case of high humidity, the antistatic effect is good, but in the case of low humidity, the antistatic effect is greatly reduced, so that the electrostatic charge accumulated on the tow cannot be conducted in time, causing broken ends, filaments and sagging; With this antistatic agent, the heat resistance effect is not good, and long-term use will easily cause coking. Another is to use β-alkyl sulfonate mixed with higher alcohol polyoxyethylene ether phosphate potassium salt and isomeric alcohol polyoxyethylene ether phosphate potassium salt. This antistatic agent has better effect than the first one. But it can't completely solve the shortcomings in use. The present invention adopts the composite antistatic agent to be composed of the first component, the second component and the third component, and the weight ratio of the first component, the second component and the third component is 1:1: 2, the described first component is octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate and ethylene oxide or the described first component is the mixture that alkylamine and ethylene oxide are formed ; Described second component is higher carbon alcohol polyoxyethylene ether phosphate potassium salt or isomerized alcohol polyoxyethylene ether phosphate potassium salt; Described third component is composed of polyether silicone oil and isomerized alcohol polyoxyethylene It is composed of vinyl ether, and the weight ratio of the polyether silicone oil to the isomeric alcohol polyoxyethylene ether is 1:1.2. The preparation process of the composite antistatic agent is to first weigh the first component, the second component and the third component according to the weight ratio, first heat the third component to 40-60 ° C, and then add the first component in turn. Part and the second component, after fully stirring, a composite antistatic agent is obtained, which can effectively make up for the deficiencies between them, and give full play to the heat resistance of the composite spandex oil and the antistatic effect under different humidity conditions, especially The antistatic properties under dry spinning conditions play a very good role.

Antioxidant is an important additive to ensure that the spinning dope is not oxidized or only slowly oxidized during the storage and use of the spinning dope. In order to reduce costs, the traditional spinning oil basically does not use antioxidants or only uses a single Antioxidant, the effect is not obvious, the oil stained on the fiber silk is easy to oxidize, making the silk easy to turn yellow and difficult to rinse. The invention adopts the composite use of different types of antioxidants, and gives full play to the characteristics of more effectively improving the antioxidant effect when the three types of aniline antioxidants, phenolic ester antioxidants and alkenoic acid antioxidants are used in combination, so as to ensure the silk after drawing. It is not yellowed, and at the same time makes it easy to rinse when used in the subsequent process.

In the spinning oil, because each additive can exert its own function, it will also have adverse effects, that is, it will increase the blocking coefficient of the spinning dope during drawing. In order to solve this problem, the present invention specially selects polyisobutylene compounds as dispersants On the one hand, the blocking coefficient of the spinning dope prepared with it is low, which is conducive to the smoothness of fiber drawing, and on the other hand, it also has high temperature resistance and smoothness.

The softener can be adsorbed on the surface of the fiber to make the surface of the fiber smooth, and at the same time, it can improve the hand and touch, and make the pulled silk smooth and beautiful. In addition to the above functions, the softener selected in the present invention also has a great promoting effect on improving the smoothness of the spinning oil, the antifouling ability of spinning and the antistatic property.

The emulsifier not only has a good affinity for the hydrophobic group and the emulsified material, but also maintains a large hydrophilic property. Through the corresponding physical and chemical reactions, it can form a unified and organic stability with the emulsified material. Equilibrium state, so that the whole spinning finish can form a stable, homogeneous and balanced emulsion. The emulsifier selected in the present invention not only has its own normal emulsification function, but also takes into account the environmental protection effect, and the product does not contain APEO.

All spinning oils contain a certain amount of olefins, and an acidic substance in the olefins makes the spinning oils not easy to store and unstable. In order to solve the above problems, the present invention selects stearic acid metal salts as the addition and The compound use of the dispersant effectively solves the stable storage of the spinning oil, is not easy to change color, and plays an important role in anti-corrosion, and the spinning dope will not be blocked in the pipeline during use.

At present, some spinning oil products on the market basically do not add preservatives, or some are temporary preservatives that are harmful to some aldehydes even if they are added. Because the storage conditions of spinning oil are different, once the storage is poor, it is prone to corruption. It will bring adverse consequences to the production, and the addition of preservatives can greatly delay the spoilage of the oil and emulsion, and can ensure the storage stability of the oil. In the present invention, imidazole compounds are used as preservatives, and at the same time, appropriate carboxylic acid amine salts or boric acid amine salts are used as preservatives, so as to effectively improve the antiseptic effect of the spinning oil.

Spinning oil is easy to produce bubbles in the process of heating up, and the air bubbles have an important impact on the uniformity and smoothness of fiber drawing. The defoaming agent in the original solution can control the generation of air bubbles and ensure the effect of oil in the process of spinning and drawing. Normal functioning plays an important role. The defoaming agent selected in the present invention can ensure the good defoaming effect of effectively controlling the spinning oil in use.

High-temperature smoothing agents containing aromatic hydrocarbons, naphthenes, long-chain and branched-chain saturated hydrocarbons (hydroparaffinic base oil, hydrogenated naphthenic base oil), according to the type of skeleton formed by the linking of carbon and carbon, can be divided into Three types:

为特征的单元)；①Aromatic hydrocarbons (with

is the characteristic unit);

为特征的单元)；②Cycloalkane (with five-membered ring

is the characteristic unit);

为基本单元)③ Long-chain and branched-chain saturated hydrocarbons (with

basic unit)

In order to express the type of carbon atoms in the carbon skeleton, it is expressed by "carbon type analysis" - C _A , _CN , Cp. In order to effectively illustrate the difference between the hydroparaffinic base oil fraction and the hydrogenated naphthenic oil, the following carbon chain skeleton description is now used:

If there are 6 aromatic ring carbons (1#-6#), then C _A =24%;

If there are 8 naphthenic carbons (7#-14#), then _CN = 32%;

Chain ring carbon 11 (15#-25#) Cp=44%.

1) Compared with the prior art, the dry process antistatic spandex spinning oil of the present invention has the following positive and obvious advantages. Spin finish has stable kinematic viscosity. The kinematic viscosity of the product at 40°C measured by GB/T265 is 11-15mm2/s, and the kinematic viscosity of the traditional product at 40°C is 8-25mm2/s. The event proves that the kinematic viscosity of the product at 40°C is stable. The best effect is when the viscosity is stable at 12-14mm2/s. When the kinematic viscosity of the product at 40°C is less than 12mm2/hour, the viscosity is too low, resulting in too low oiling rate, smooth reduction, and easy wire breakage; The oil rate is too high, the viscosity is too high, the spinning speed is reduced, and the oiling rate is too high will increase the consumption of oil, which not only increases the production cost, but also causes the increase of the amount of chemical cleaning agent in the subsequent cleaning process to pollute the environment. Therefore, this product Appropriate kinematic viscosity ensures the stable oiling rate during the spinning process, and also ensures the stability of the spinning quality.

2) Spinning finish has excellent antistatic effect. Spinning oil has excellent antistatic effect under various humidity conditions, especially under dry spinning conditions. The unwinding tension inside and outside the cake is uniform, and it is not easy to drop and break the yarn, and the comprehensive unwinding in the subsequent processing process. Performance is optimized.

3) Spinning finish has good heat resistance. The open flash point of the product measured by GB/T3536 method is 216-225℃, and the flash point of the traditional product is 155-190℃. Make the spinning and drawing production run normally, suitable for high-speed spinning process of various specifications including thick and thin fibers, no smoke, no coking on the hot roller.

4) Spinning oil has good wettability, adhesion, permeability and yellowing resistance. The product is not easy to dye the fibers yellow, and the subsequent rinse is easy.

5) Spinning finish has good smoothness, dispersion and anti-blocking properties. The isolation between the spandex filament and the filament effectively avoids mutual adhesion, and the spinning has good bundle performance, which is conducive to the formation of the filament cake and prevents the thread from slipping off.

6) Spinning finish has high stability. It has stable performance in the spinning production process, excellent dilution stability and shear stability, and does not stop during the spinning process.

7) The spinning oil has strong anti-foaming performance. In the production process, it is not easy to produce foam, and the oiling is uniform, which is conducive to the smooth progress of spinning.

8) The spinning finish has good forming, unbundling, storage resistance and good stability in use. The preservatives added in the product can effectively improve the long-term use of the emulsion, without delamination, corruption and odor.

9) Spinning finish is excellent.

10) Spinning finish has excellent environmental performance. The product does not contain APEO, which is restricted by Oeko-Tex Standard 100 spinning industry, and meets the national environmental protection requirements and export standards.

11) The product enables the spandex yarn to pass through the post-spinning process of various equipments, which effectively improves the finished product rate and excellent rate of spandex spinning.

12) The dry-process spandex spinning finish of the present invention has extremely excellent antistatic properties, economical cost and simple production process.

Detailed ways:

Example 1

The present invention is a dry process antistatic spandex spinning oil, which is composed of a composite high temperature smoothing agent, a composite antistatic agent, a phenolic antioxidant, an aniline antioxidant, an alkene acid antioxidant, a high temperature dispersant, a softener, Environmentally friendly emulsifier, stearic acid metal salt, preservative and defoaming agent. In the dry antistatic spandex spinning oil, the weight percentage of the hydrogenated paraffin base oil is 51%, the weight percentage of the hydrogenated naphthenic base oil is 25%, and the weight percentage of the hydrogenated naphthenic base oil is 25%. The weight percentage of the methyl silicone oil is 8%, the weight percentage of the composite antistatic agent is 7%, the weight percentage of the phenolic antioxidant is 0.5%, and the weight percentage of the anilino antioxidant is 0.5%. The percentage is 0.5%, the weight percentage of the alkene acid antioxidant is 0.8%, the weight percentage of the high temperature dispersant is 1%, the weight percentage of the softener is 1.6%, the environmental protection type The weight percentage of the emulsifier is 4.1%, the weight percentage of the metal stearate is 0.1%, the weight percentage of the preservative is 0.4%, and the weight percentage of the defoamer composition is 0.3%. In the hydroparaffinic base oil, 65%>Cp>56%, in the hydrogenated naphthenic base oil, 50%>Cp>42%, Cp refers to the long chain and The number of carbon atoms in branched saturated hydrocarbons as a percentage of the total number of carbon atoms in the carbon backbone.

Further, the kinematic viscosity of the hydroparaffinic base oil at 40°C is 10-18 mm ² /s.

Further, the kinematic viscosity of the hydrogenated naphthenic base oil at 40° C. is 10-20 mm ² /s.

Further, the methyl silicone oil is dimethyl silicone oil with a kinematic viscosity of 1000-1200 cSt (centiStokes) at 40°C.

Further, the composite antistatic agent is composed of the first component, the second component and the third component, and the weight ratio of the first component, the second component and the third component is 1: 1:2, the first component is a mixture of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate and ethylene oxide; the second component is an isomeric alcohol polyoxyethylene ether Phosphate ester potassium salt; the third component is composed of polyether silicone oil and isomeric alcohol polyoxyethylene ether, and the weight ratio of the polyether silicone oil to isomeric alcohol polyoxyethylene ether is 1:1.2.

Further, the preparation process of the composite antistatic agent is to first weigh the first component, the second component and the third component according to the weight ratio, then the third component is heated to 40-60 ° C, and then The first component and the second component are added in sequence, and after being fully stirred, a composite antistatic agent is obtained.

Further, the phenol-based antioxidant is a liquid macromolecular methyl bisphenol-based antioxidant 2,6-di-tert-butylphenol.

Further, the aniline antioxidant is liquid octyl-butyldiphenylamine.

Further, the alkenoic acid antioxidant is docosapentaenoic acid.

Further, the high temperature dispersant is polyisobutylene polysuccinimide.

Further, the softener polyether modified silicone emulsion.

Further, the environment-friendly emulsifier is a mixture of polyether polymer compound and polyoxyethylene laurate.

Further, the metal stearate is a mixture of barium stearate and zinc stearate.

Further, the mixture of the preservative imidazole compound and the carboxylic acid amine salt.

Further, the defoamer is tributyl phosphate.

Example 2

The present invention is a dry process antistatic spandex spinning oil, which is composed of a composite high temperature smoothing agent, a composite antistatic agent, a phenolic antioxidant, an aniline antioxidant, an alkene acid antioxidant, a high temperature dispersant, a softener, Environmentally friendly emulsifier, stearic acid metal salt, preservative and defoaming agent. In the dry antistatic spandex spinning oil, the weight percentage of the hydrogenated paraffin base oil is 54%, the weight percentage of the hydrogenated naphthenic base oil is 21%, and the weight percentage of the hydrogenated naphthenic base oil is 21%. The weight percentage of the methyl silicone oil is 7%, the weight percentage of the composite antistatic agent is 8%, the weight percentage of the phenolic antioxidant is 0.6%, and the weight percentage of the anilino antioxidant is 0.6%. The percentage is 0.4%, the weight percentage of the alkenoic acid antioxidant is 0.3%, the weight percentage of the high temperature dispersant is 1.5%, the weight percentage of the softener is 1.2%, the environmental protection type The weight percentage of the emulsifier is 5.5%, the weight percentage of the metal stearate is 0.2%, the weight percentage of the preservative is 0.3%, and the weight percentage of the defoamer composition is 0.4%. In the hydroparaffinic base oil, 65%>Cp>56%, in the hydrogenated naphthenic base oil, 50%>Cp>42%, Cp refers to the long chain and The number of carbon atoms in branched saturated hydrocarbons as a percentage of the total number of carbon atoms in the carbon backbone.

Further, the kinematic viscosity of the hydroparaffinic base oil at 40° C. is 10-18 mm ² /s.

The kinematic viscosity of the hydrogenated naphthenic base oil at 40° C. is 10-20 mm ² /s.

Further, the methyl silicone oil is dimethyl silicone oil with a kinematic viscosity of 1000-1200 cSt (centiStokes) at 40°C.

Further, the composite antistatic agent is composed of the first component, the second component and the third component, and the weight ratio of the first component, the second component and the third component is 1: 1:2, the first component is the mixture of octadecyldimethyl hydroxyethyl quaternary ammonium nitrate and ethylene oxide; the second component is isomeric alcohol polyoxyethylene ether phosphoric acid ester potassium salt; the third component is composed of polyether silicone oil and isomeric alcohol polyoxyethylene ether, and the weight ratio of the polyether silicone oil to isomeric alcohol polyoxyethylene ether is 1:1.2.

Further, the preparation process of the composite antistatic agent is to first weigh the first component, the second component and the third component according to the weight ratio, then the third component is heated to 40-60 ° C, and then The first component and the second component are added in sequence, and after being fully stirred, a composite antistatic agent is obtained.

Further, the phenol-based antioxidants are liquid macromolecular methyl bisphenol-based antioxidants 2,6-di-tert-butylphenol, 4,4-methylbis(2,6-di-tert-butylphenol) )mixture.

Further, the aniline antioxidant is liquid octyl-butyldiphenylamine.

Further, the alkenoic acid antioxidant is docosapentaenoic acid.

Further, the high temperature dispersant is a mixture of polyisobutylene polysuccinimide and polyisobutylene succinimide.

Further, the softener is a mixture of polyether-modified silicone emulsion and amino-modified silicone emulsion.

Further, the environment-friendly emulsifier is a mixture of linear fatty alcohol polyoxyethylene ether and isomeric alcohol polyoxyethylene ether.

Further, the metal stearate is a mixture of barium stearate and magnesium stearate.

Further, the described preservative imidazole compound and borate amine salt mixture.

Further, the defoamer is a mixture of tributyl phosphate and methyl siloxane.

Example 3

The present invention is a dry process antistatic spandex spinning oil, which is composed of a composite high temperature smoothing agent, a composite antistatic agent, a phenolic antioxidant, an aniline antioxidant, an alkene acid antioxidant, a high temperature dispersant, a softener, Environmentally friendly emulsifier, stearic acid metal salt, preservative and defoaming agent. In the dry antistatic spandex spinning oil, the weight percentage of the hydrogenated paraffin base oil is 52%, the weight percentage of the hydrogenated naphthenic base oil is 22%, and the weight percentage of the hydrogenated naphthenic base oil is 22%. The weight percentage of the methyl silicone oil is 10%, the weight percentage of the composite antistatic agent is 6%, the weight percentage of the phenolic antioxidant is 0.8%, and the weight percentage of the anilino antioxidant is 0.8%. The percentage is 0.3%, the weight percentage of the alkene acid antioxidant is 0.5%, the weight percentage of the high temperature dispersant is 1.2%, the weight percentage of the softener is 1.4%, the environmental protection type The weight percentage of the emulsifier is 5.4%, the weight percentage of the metal stearate is 0.2%, the weight percentage of the preservative is 0.2%, and the weight percentage of the defoamer composition is 0.5%. In the hydroparaffinic base oil, 65%>Cp>56%, in the hydrogenated naphthenic base oil, 50%>Cp>42%, Cp refers to the long chain and The number of carbon atoms in branched saturated hydrocarbons as a percentage of the total number of carbon atoms in the carbon backbone.

Further, the kinematic viscosity of the hydroparaffinic base oil at 40° C. is 10-18 mm ² /s.

Further, the kinematic viscosity of the hydrogenated naphthenic base oil at 40° C. is 10-20 mm ² /s.

Further, the methyl silicone oil is dimethyl silicone oil with a kinematic viscosity of 1000-1200 cSt (centiStokes) at 40°C.

Further, the composite antistatic agent is composed of the first component, the second component and the third component, and the weight ratio of the first component, the second component and the third component is 1: 1:2, the first component is the mixture of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate and ethylene oxide; the second component is higher alcohol polyoxyethylene ether phosphoric acid ester potassium salt; the third component is composed of polyether silicone oil and isomeric alcohol polyoxyethylene ether, and the weight ratio of the polyether silicone oil to isomeric alcohol polyoxyethylene ether is 1:1.2.

Further, the preparation process of the composite antistatic agent is to first weigh the first component, the second component and the third component according to the weight ratio, then the third component is heated to 40-60 ° C, and then The first component and the second component are added in sequence, and after being fully stirred, a composite antistatic agent is obtained.

Further, the phenol-based antioxidant is a liquid polymer methyl bisphenol-based antioxidant, which is 2,6-di-tert-butyl-p-cresol.

Further, the aniline antioxidant is liquid octyl-butyldiphenylamine.

Further, the alkenoic acid antioxidant is docosapentaenoic acid.

Further, the high temperature dispersant is a mixture of polyisobutylene polysuccinimide and polyisobutylene succinimide.

Further, the softener is a mixture of polyether-modified silicone emulsion and amino-modified silicone emulsion.

Further, the environment-friendly emulsifier is a mixture of linear fatty alcohol polyoxyethylene ether and lauric acid polyoxyethylene ester.

Further, the metal stearate is a mixture of magnesium stearate and zinc stearate.

Further, the mixture of the preservative imidazole compound and the carboxylic acid amine salt.

Further, the defoamer is a mixture of tributyl phosphate and methyl siloxane.

Example 4

The present invention is a dry process antistatic spandex spinning oil, which is composed of a composite high temperature smoothing agent, a composite antistatic agent, a phenolic antioxidant, an aniline antioxidant, an alkene acid antioxidant, a high temperature dispersant, a softener, Environmentally friendly emulsifier, stearic acid metal salt, preservative and defoaming agent. In the dry antistatic spandex spinning oil, the weight percentage of the hydrogenated paraffin base oil is 55%, the weight percentage of the hydrogenated naphthenic base oil is 18%, and the weight percentage of the hydrogenated naphthenic base oil is 18%. The weight percentage of the methyl silicone oil is 9%, the weight percentage of the composite antistatic agent is 7%, the weight percentage of the phenolic antioxidant is 1%, the weight percentage of the aniline antioxidant The percentage is 0.2%, the weight percentage of the alkenoic acid antioxidant is 0.6%, the weight percentage of the high temperature dispersant is 1.8%, the weight percentage of the softener is 1.8%, the environmental protection type The weight percentage of the emulsifier is 4.8%, the weight percentage of the metal stearate is 0.3%, the weight percentage of the preservative is 0.5%, and the weight percentage of the defoamer composition is 0.2%. In the hydroparaffinic base oil, 65%>Cp>56%, in the hydrogenated naphthenic base oil, 50%>Cp>42%, Cp refers to the long chain and The number of carbon atoms in branched saturated hydrocarbons as a percentage of the total number of carbon atoms in the carbon backbone.

Further, the kinematic viscosity of the hydroparaffinic base oil at 40° C. is 10-18 mm ² /s.

Further, the kinematic viscosity of the hydrogenated naphthenic base oil at 40° C. is 10-20 mm ² /s.

Further, the methyl silicone oil is dimethyl silicone oil with a kinematic viscosity of 1000-1200 cSt (centiStokes) at 40°C.

Further, the composite antistatic agent is composed of the first component, the second component and the third component, and the weight ratio of the first component, the second component and the third component is 1: 1:2, the first component is a mixture of alkylamine and ethylene oxide; the second component is higher alcohol polyoxyethylene ether phosphate potassium salt; the third component The part is composed of polyether silicone oil and isomeric alcohol polyoxyethylene ether, and the weight ratio of the polyether silicone oil to isomeric alcohol polyoxyethylene ether is 1:1.2.

Further, the preparation process of the composite antistatic agent is to first weigh the first component, the second component and the third component according to the weight ratio, then the third component is heated to 40-60 ° C, and then The first component and the second component are added in sequence, and after being fully stirred, a composite antistatic agent is obtained.

Further, the phenol-based antioxidant is a liquid macromolecule methyl bisphenol-based antioxidant, which is 4,4-methylbis(2,6-di-tert-butylphenol), 2,6-di-tert-butyl A mixture of two bases p-cresol.

Further, the aniline antioxidant is liquid octyl-butyldiphenylamine.

Further, the alkenoic acid antioxidant is docosapentaenoic acid.

Further, the high temperature dispersant is polyisobutylene succinimide.

Further, the softener polyether modified silicone emulsion.

Further, the environment-friendly emulsifier is a mixture of polyether polymer compound and isomeric alcohol polyoxyethylene ether.

Further, the metal stearate is a mixture of magnesium stearate and calcium stearate.

Further, the preservative is a mixture of any one of imidazole compounds and boronic acid amine salts.

Further, the defoamer is methyl siloxane.

Embodiment 1-4 all adopts following method to prepare:

The preparation method of the dry process antistatic spandex spinning oil of the present invention comprises a step of preparing a hydroparaffin base oil of 65%>Cp>56% and a process of preparing a hydrogenated naphthenic oil of 50%>Cp>42% The step of the base oil, after the above two steps are completed, weigh the hydrogenated paraffin base oil, hydrogenated naphthenic base oil, methyl silicone oil, composite antistatic agent, phenolic antioxidant, benzene Amino antioxidant, alkenoic acid antioxidant, high temperature dispersant, softener, environment-friendly emulsifier, stearic acid metal salt, preservative and defoaming agent, while taking by weighing the refined clay, the weight of the refined clay is Hydrogenated paraffin base oil, hydrogenated naphthenic base oil, methyl silicone oil, compound antistatic agent, phenolic antioxidant, aniline antioxidant, alkenoic acid antioxidant, high temperature dispersant, softener, environmental protection 2% to 6% of the total weight of type emulsifier, stearic acid metal salt, preservative and defoamer, and then add hydrogenated paraffin base oil, hydrogenated naphthenic base oil, methyl alcohol to the first reactor. Base silicone oil, then heated to 110℃～130℃, and then added refined clay, and carried out stirring and refining adsorption for 30～60min at the same time, until the adsorption reaction was uniform, and the precipitation was filtered by a filter for 2～3 times and then pumped into the second reaction After the kettle is cooled to 50℃～70℃, add environment-friendly emulsifier and stearic acid metal salt and stir evenly for 20min～40min, then compound antistatic agent, phenolic antioxidant, aniline antioxidant, alkenoic acid Antioxidant, high temperature dispersant, softener, preservative and defoamer are added to the second reaction kettle, stirred for 30min-60min uniformly, and the product can be obtained after cooling.

Further, the first and second reaction kettles are treated with vacuum pump circulating vacuum negative pressure 0.75-1.0KPa for 1-3 times.

Further, in the step of preparing 65%>Cp>56% hydroparaffinic base oil, firstly, the fractions of alkanes, monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons and unsaturated chain hydrocarbons are used as raw materials, and the Hydrorefining, the fraction of the unsaturated chain hydrocarbons accounts for 30-90% of the raw material by weight, the reaction pressure of the reactor in the hydrorefining process is 4-12MPa, and the reaction temperature is 250-340 ℃ , the total inlet space velocity is 0.2~0.55/h, the volume ratio of reaction hydrogen to oil is 650~850, the space velocity relative to the hydrotreating catalyst is 0.4~0.75/h, and the space velocity relative to the hydrorefining catalyst is 0.6~1.75/h , the catalyst in the hydrorefining process is Ni-W/AL ₂ O ₃ , or Ni-Mo-W/AL ₂ O ₃ , or Ni-Mo-Co/A AL ₂ O ₃ , and then carry out atmospheric reduction Pressure distillation, the vacuum distillation process is a residual pressure of 1 ~ 55mmHg, and the distillate oil at 200 ~ 280 ℃ normal pressure is cut to obtain a hydroparaffin base oil with 65%>Cp>56%.

Further, in the step of preparing 50%>Cp>42% naphthenic base oil, firstly, the fractions of alkanes, monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons and unsaturated chain hydrocarbons are used as raw materials, and the Hydrorefining, the fraction of unsaturated chain hydrocarbons accounts for 40-80% of the raw material by weight, the reaction pressure of the reactor in the hydrorefining process is 4.5-12MPa, and the reaction temperature is 230-330°C , the total inlet space velocity is 0.25~0.55/h, the volume ratio of reaction hydrogen to oil is 650~900, the space velocity relative to the hydrotreating catalyst is 0.35~0.8/h, and the space velocity relative to the hydrorefining catalyst is 0.5-1.75/h , the catalyst in the hydrorefining process is Ni-W/AL ₂ O ₃ , or Ni-Mo-W/AL ₂ O ₃ , or Ni-Mo-Co/AL ₂ O ₃ , followed by normal and reduced pressure Distillation, the vacuum distillation process is that the residual pressure is 1-55 mmHg, and the distillate oil at the normal pressure of 220-320 ° C is cut to obtain a naphthenic oil with 50%>Cp>42%.

Further, the refined clay is activated clay with an activity greater than 180 mmol/kg.

The physical and chemical indicators are shown in Table 1.

Table 1

Oiling rate test method: use a certain amount of spinning oil to spin spandex, record the spinning amount and the value of the spinning oil before and after spinning, and calculate the oiling rate.

The physicochemical properties of Example 4 of the present invention and domestic and foreign products popularly used in the market are shown in Table 2

Table 2

It can be output from Table 2 that the pour point of the present invention is close to that of the imported product, which is obviously due to the domestic comparative product; the flash point and active ingredient are better than the imported and domestic products; The oiling rate of the invention is also obviously stable and moderate.

Example 4 of the present invention and the domestic and foreign products popularly used in the market are shown in Table 3 for comparison of measured data in the spinning process

table 3

As can be seen from Table 3, the electrostatic performance (KV) of Example 4 of the present invention is comparable to that of the imported product at low speed. With the increase of the speed, the friction decreases rapidly, which is obviously due to the imported product, whether at low speed or high speed Under these conditions, the electrostatic performance is obviously better than that of the domestically produced comparison products, which reflects the unique antistatic performance of the product of the present invention. Whether at high speed or low speed, the friction F/N is comparable to that of imported products, but it is obviously better than that of domestically produced comparison products, showing excellent smoothness performance.

After using various oils, the spandex yarns are spun into various performance tests and the comparison data is shown in Table 4.

Table 4

As can be seen from Table 4, the 300% stress and linear density coefficient of variation (%) index in Example 4 of the present invention are comparable to domestic products, and are better than imported products of the same type, and the dry heat recovery rate (%) is generally due to domestic products. Compared with imported products, especially imported products, the indicators in this respect are relatively low; elongation at break (%) and coefficient of variation (%) of elongation at break are better than similar imported products, especially in surface unwinding and inner layer The range of unwinding, deteriorating surface unwinding and deteriorating inner unwinding is small, showing unique unwinding stability performance.

The above description is only one of the embodiments of the present invention, and does not represent any form of limitation on the technical solutions of the present invention. Any simple modifications, equivalent changes and modifications made to the embodiments of the present invention according to the technical essence of the present invention shall fall within the protection scope of the present invention.

The beneficial effects of the present invention are as follows: firstly, the present invention fully utilizes the advantages of aromatic hydrocarbons, naphthenes and chain hydrocarbons contained in the product structure, and then is compounded with methyl silicone oil, overcoming the traditional production of spinning finish oil using a single group of The disadvantage brought by the separation of mineral oil greatly improves the lubricating performance of the spandex dry spinning; secondly, the present invention adopts a composite antistatic agent, so that the spinning oil has excellent performance under various humidity and spinning speed conditions. Antistatic effect, uniform unwinding tension inside and outside the silk cake, not easy to drop and break; thirdly, the present invention gives full play to the characteristic of more effectively improving the antioxidant effect when the aniline antioxidant and the phenolic ester antioxidant are used in combination , to solve the problem of discoloration and difficult cleaning of the tow after drawing; fourthly, the product of the present invention is also stable in product storage, solves the problem of multi-bubble in the spinning process, solves the problem of adhesion between threads, and the finished product spinning. It has excellent performance in terms of softness, hand feel, and environmental protection performance.

Claims (3)

1. a dry process antistatic spandex spinning oil is characterized in that: by compound high temperature smoothing agent, compound antistatic agent, phenolic antioxidant, aniline antioxidant, alkene acid antioxidant, high temperature dispersant , softener, environment-friendly emulsifier, stearic acid metal salt, preservative and defoaming agent, the compound high temperature smoothing agent is composed of hydroparaffin base oil, hydrogenated naphthenic base oil and methyl silicone oil. composition; In the dry antistatic spandex spinning oil, the weight percentage of the hydrogenated paraffin base oil is 45% to 55%, and the weight percentage of the hydrogenated naphthenic base oil is 15% ~25%, the weight percentage of the methyl silicone oil is 5% to 10%, the weight percentage of the composite antistatic agent is 4% to 8%, and the weight percentage of the phenolic antioxidant is 0.5% %～1%, the weight percentage of the aniline antioxidant is 0.2%～0.5%, the weight percentage of the alkene acid antioxidant is 0.2%～1%, the weight percentage of the high temperature dispersant is 0.2%～1% 0.5% to 2%, the weight percentage of the softener is 1% to 2%, the weight percentage of the environment-friendly emulsifier is 2% to 6%, and the weight percentage of the metal stearate is 1% to 2%. 0.1% to 0.3%, the weight percentage of the preservative is 0.1% to 0.5%, and the weight percentage of the defoamer is 0.1% to 0.5%. In the hydrogenated paraffin base oil , 65%> Cp> 56%, in the hydrogenated naphthenic base oil, 50%> Cp> 42%, Cp refers to the number of carbon atoms in the long-chain and branched-chain saturated hydrocarbons in the base oil. The percentage of total carbon atoms in the backbone; The kinematic viscosity of the hydroparaffinic base oil at 40° C. is 10-18 mm ² /s, and the kinematic viscosity of the hydrogenated naphthenic base oil at 40° C. is 10-20 mm ² /s. Described methyl silicone oil is dimethyl silicone oil with kinematic viscosity of 1000-1200cSt at 40°C; The composite antistatic agent is composed of a first component, a second component and a third component, and the weight ratio of the first component, the second component and the third component is 1:1:2 , the first component is selected from the mixture of octadecyldimethyl hydroxyethyl quaternary ammonium nitrate and ethylene oxide, or the first component is selected from alkylamine and ethylene oxide The mixture composed of alkane; the second component is higher alcohol polyoxyethylene ether phosphate potassium salt or isomerized alcohol polyoxyethylene ether phosphate potassium salt; the third component is composed of polyether silicone oil and isopropyl alcohol structure alcohol polyoxyethylene ether, the weight ratio of the polyether silicone oil to the isomeric alcohol polyoxyethylene ether is 1:1.2; The preparation process of the composite antistatic agent is as follows: weighing the first component, the second component and the third component according to the weight ratio, first heating the third component to 40-60 ° C, and then adding the first component in turn. The component and the second component are fully stirred to obtain a composite antistatic agent; Described phenolic antioxidant is 2,6-di-tert-butylphenol or 2,6-di-tert-butyl-p-cresol any one or the mixture of both; Described aniline antioxidant is liquid Octyl-butyldiphenylamine; described alkenoic acid antioxidants are docosapentaenoic acid, docosapentaenoic acid; described high temperature dispersants are polyisobutylene polysuccinimide, poly Any one or two mixtures of isobutylene succinimide; any one or two mixtures of the softener polyether-modified silicone emulsion and amino-modified silicone emulsion; the environmentally friendly The emulsifier is a mixture of any two of polyether polymer compounds, straight-chain fatty alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, and lauric acid polyoxyethylene ester; the metal stearate is stearin Mix any two in barium acid, magnesium stearate, zinc stearate, calcium stearate; Described preservatives are any of imidazole compounds and carboxylic acid amine salts, imidazole compounds and boric acid amine salts. A mixture; the defoamer is any one or a mixture of the mixture of tributyl phosphate and methyl siloxane; The preparation method of the above-mentioned dry antistatic spandex spinning oil includes a step of preparing a hydrogenated paraffin base oil of 65%>Cp>56% and a preparation of 50%>Cp>42% hydrogenated naphthenic base oil The step of the base oil, after the above two steps are completed, weigh the hydrogenated paraffin base oil, hydrogenated naphthenic base oil, methyl silicone oil, composite antistatic agent, phenolic antioxidant, aniline according to weight percentage Antioxidant, alkenoic acid antioxidant, high temperature dispersant, softener, environment-friendly emulsifier, stearic acid metal salt, preservative and defoamer, simultaneously weighed refined clay, the weight of the Hydroparaffinic base oil, hydrogenated naphthenic base oil, methyl silicone oil, compound antistatic agent, phenolic antioxidant, aniline antioxidant, alkenoic acid antioxidant, high temperature dispersant, softener, environmental friendly 2% to 6% of the total weight of emulsifier, stearic acid metal salt, preservative and defoamer, and then add hydroparaffin base oil, hydrogenated naphthenic base oil, methyl Silicone oil, then heated to 110 ℃ ~ 130 ℃ temperature, then add refined clay, and at the same time carry out stirring and refining adsorption for 30 to 60 minutes, until the adsorption reaction is uniform, the precipitation is filtered by a filter and then pumped into the second reaction kettle, and cooled to 50 After ℃～70℃, add environment-friendly emulsifier and stearic acid metal salt, stir evenly, then add compound antistatic agent, phenolic antioxidant, aniline antioxidant, alkenoic acid antioxidant and high temperature dispersant. , softener, preservative and defoamer are added to the second reaction kettle, stirred evenly, and cooled to obtain dry antistatic spandex spinning oil; In the described step of preparing 65%>Cp>56% hydrogenated paraffin base oil, firstly, the fractions of alkanes, monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons and unsaturated chain hydrocarbons are used as raw materials, and hydrogenation is carried out first. Refining, the fraction of the unsaturated chain hydrocarbons accounts for 30-90% of the raw material by weight, the reaction pressure of the reactor in the hydrorefining process is 4-12 MPa, the reaction temperature is 250-340 ° C, and the The total oil space velocity is 0.2~0.55/h, the volume ratio of reaction hydrogen to oil is 650~850, the space velocity relative to the hydrotreating catalyst is 0.4~0.75/h, and the space velocity relative to the hydrotreating catalyst is 0.6~1.75/h, so The catalyst in the hydrorefining process is Ni _- W/AL2O3, or Ni _- Mo _- W/AL2O3, or Ni _- Mo _- Co/ _AL2O3 , followed by atmospheric and vacuum distillation, The vacuum distillation process is that the residual pressure is 1-55 mmHg, and the distillate oil at the normal pressure of 200-280 ℃ is cut to obtain a hydroparaffinic base oil with 65%>Cp>56%; In the step of preparing 50%>Cp>42% naphthenic base oil, firstly, the fractions of alkanes, monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons and unsaturated chain hydrocarbons are used as raw materials, and hydrogenation is carried out first. Refining, the fraction of unsaturated chain hydrocarbons accounts for 40-80% of the raw material by weight, the reaction pressure of the reactor in the hydrorefining process is 4.5-12 MPa, the reaction temperature is 230-330 ° C, and the The total oil space velocity is 0.25-0.55/h, the volume ratio of reaction hydrogen to oil is 650-900, the space velocity relative to the hydrotreating catalyst is 0.35-0.8/h, and the space velocity relative to the hydrotreating catalyst is 0.5-1.75/h, so The catalyst in the hydrorefining process is Ni-W/AL ₂ O ₃ , or Ni-Mo-W/AL ₂ O ₃ , or Ni-Mo-Co/AL ₂ O ₃ , followed by atmospheric and vacuum distillation, The vacuum distillation process is that the residual pressure is 1-55 mmHg, and the distillate oil at the normal pressure of 220-320 ℃ is cut to obtain a naphthenic oil with 50%>Cp> 42%. 2. a kind of dry method antistatic spandex spinning oil according to claim 1 is characterized in that: described first and second reaction kettles all adopt vacuum pump circulating vacuum negative pressure 0.75～1.0KPa to process 1 ~ 3 times. 3. a kind of dry antistatic spandex spinning oil according to claim 1 is characterized in that: described refined clay is the activated clay with activity degree greater than 180mmol/kg.