CN112210047A - Plastic-dipped powder and preparation method thereof - Google Patents
Plastic-dipped powder and preparation method thereof Download PDFInfo
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- CN112210047A CN112210047A CN202011017671.0A CN202011017671A CN112210047A CN 112210047 A CN112210047 A CN 112210047A CN 202011017671 A CN202011017671 A CN 202011017671A CN 112210047 A CN112210047 A CN 112210047A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/04—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polycarbonamides, polyesteramides or polyimides
- C08F283/045—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polycarbonamides, polyesteramides or polyimides on to unsaturated polycarbonamides, polyesteramides or polyimides
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F287/00—Macromolecular compounds obtained by polymerising monomers on to block polymers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/40—Polyamides containing oxygen in the form of ether groups
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/44—Polyester-amides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/48—Polymers modified by chemical after-treatment
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C08G81/024—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G
- C08G81/028—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G containing polyamide sequences
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
- C09D177/12—Polyester-amides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D187/00—Coating compositions based on unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
- C09D187/005—Block or graft polymers not provided for in groups C09D101/00 - C09D185/04
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
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Abstract
The invention relates to a plastic-impregnated powder and a preparation method thereof, wherein the plastic-impregnated powder is mainly prepared from the following components in percentage by mass: 1-8% of graft; 0.1 to 1 percent of cross-linking agent; 91-98.9% of nylon elastomer. The technical scheme of the invention is that 1-8% of graft in percentage by mass is added in the components, the graft has both polarity and non-polarity, and can be grafted on a polar substance or a non-polar substance and generate a coupling reaction, so that the affinity between the originally incompatible polar substance and the non-polar substance is greatly improved, the interfacial binding power between a dispersed phase and a continuous phase in the blend is improved, the binding power of the plastic-impregnated powder is obviously improved, a coating layer prepared from the plastic-impregnated powder is prevented from being separated from an adhered body, and the protection and decoration effects of the coating layer are ensured.
Description
Technical Field
The invention relates to the technical field of plastic dipping powder, in particular to plastic dipping powder and a preparation method thereof.
Background
The coating film layer prepared by plastic-impregnated powder has excellent chemical resistance such as ageing resistance, impact resistance, bending resistance, acid resistance, salt spray corrosion resistance and the like, has better surface decoration performance, and is widely used as a surface coating of pipelines, park guardrails, bicycle baskets, bookshelves, clothes hangers, grids in refrigerators and the like.
However, the adhesive force of the plastic-impregnated powder on the market is poor, a coating layer made of the plastic-impregnated powder is easy to separate from an adhered body, and the coating layer is easy to tilt or fall off after being used for a period of time, so that the protective and decorative effects cannot be continuously achieved.
Disclosure of Invention
The invention aims to provide plastic dipping powder, which can obviously improve the adhesive force of the plastic dipping powder by adding 1-8% of graft in percentage by mass in a preparation component.
In order to achieve the purpose, the invention adopts the following technical scheme:
the plastic-impregnated powder is mainly prepared from the following components in percentage by mass:
1-8% of graft;
0.1 to 1 percent of cross-linking agent;
91-98.9% of nylon elastomer.
Preferably, the graft comprises one or more of maleic anhydride, acrylic, epoxy resin, oxazoline, modified polyacrylate and isocyanate.
Preferably, the cross-linking agent comprises one or more of dicumyl peroxide, benzoyl peroxide, di-tert-butyl peroxide and dicumyl hydroperoxide.
Preferably, the nylon elastomer comprises one or more of polyester amide, polyether ester amide, polycarbonate ester amide and polyether-b-amide.
Preferably, the plastic-impregnated powder is mainly prepared from the following components in percentage by mass: 3-5% of a graft; 0.2 to 0.8 percent of cross-linking agent; 95.2 to 96.8 percent of nylon elastomer.
Preferably, the plastic-impregnated powder is mainly prepared from the following components in percentage by mass: 4% of a graft; 0.5% of a crosslinking agent; and 95.5% of nylon elastomer.
The invention also provides a preparation method of the plastic dipping powder, which comprises the following steps:
adding a molten nylon elastomer into a reaction vessel, and cooling the molten nylon elastomer to form a solid nylon elastomer;
adding the graft and the cross-linking agent into the reaction vessel according to the proportion, uniformly mixing and reacting;
and cooling a product obtained by the reaction to a target temperature, and then cutting into granules and grinding to obtain the plastic impregnated powder.
Preferably, the step of cooling the molten nylon elastomer to form a solid nylon elastomer comprises: firstly, keeping the temperature in the reaction container at 215-225 ℃, keeping the temperature for 1-2h, then cooling to 205-214 ℃, keeping the temperature for 1-2h, then cooling to 175-185 ℃, keeping the temperature for 1-2h, thereby forming a solid nylon elastomer;
the step of cooling the product obtained by the reaction to a target temperature comprises: the temperature of the reaction vessel is reduced to 165-174 ℃, the temperature is kept for 1-2h, then the temperature is reduced to 155-164 ℃, the temperature is kept for 1-2h, and finally the temperature is kept at 158-162 ℃ for 1-2 h.
Preferably, the step of cooling the molten nylon elastomer to form a solid nylon elastomer comprises: firstly, keeping the temperature in the reaction container at 220 ℃ for 1h, then cooling to 210 ℃, keeping the temperature for 1h, then cooling to 180 ℃, and keeping the temperature for 1h, thereby forming a solid nylon elastomer;
the step of cooling the product obtained by the reaction to a target temperature comprises: and cooling the reaction container to 170 ℃, preserving the heat for 1h, cooling to 162 ℃, preserving the heat for 1h, and finally preserving the temperature for 1h at 160 ℃.
Preferably, the pressure in the reaction vessel is maintained at 0.25-0.35MPa during the cooling.
Compared with the prior art, the invention has the beneficial effects that:
according to the plastic dipping powder provided by the technical scheme, 1-8% of a graft is added in the preparation components of the plastic dipping powder according to the mass percentage, the graft has both polarity and non-polarity, and can be grafted on a polar substance or a non-polar substance and perform a coupling reaction, so that the affinity between the originally incompatible polarity and non-polar substances is greatly improved, the interfacial adhesion between a dispersed phase and a continuous phase in the blend is improved, the adhesion of the plastic dipping powder is further remarkably improved, a coating layer prepared from the plastic dipping powder is prevented from being separated from an adhered body, and the protection and decoration effects of the coating layer are guaranteed; when the content of the graft is lower than 1% by mass, only a few polar substances or non-polar substances can be grafted and generate coupling reaction, and the effect of improving the adhesive force of the plastic dipping powder is poor; when the graft content is higher than 8% by mass, the proportion of the nylon elastomer is reduced, the total number of grafting and coupling reactions is relatively reduced, and the effect of improving the adhesive force of the plastic impregnated powder cannot be well achieved; experimental data show that when the graft is 4% by mass in the manufacturing component of the plastic dipping powder, the cross-linking agent is 0.5% by mass in the manufacturing component of the plastic dipping powder, and the nylon elastomer is 95.5% by mass in the manufacturing component of the plastic dipping powder, the adhesive force of the plastic dipping powder is strongest; meanwhile, 0.1-1% of cross-linking agent is added in the components for preparing the plastic dipping powder according to the mass percentage, and the cross-linking agent can perform cross-linking reaction with the polymer to convert linear or slightly branched macromolecules into a three-dimensional network structure, so that the elasticity and the bending performance of the plastic dipping powder are improved, a coating layer prepared from the plastic dipping powder can be attached to articles in various shapes, and the application range is wide.
Detailed Description
The present invention will be described in greater detail below, it being understood that the following description of the present invention is illustrative only and is not limiting. The various embodiments may be combined with each other to form other embodiments not shown in the following description.
The invention provides plastic dipping powder which comprises the following components: nylon elastomer, graft and cross-linking agent.
Wherein the nylon elastomer is used as a base material and comprises one or more of polyesteramide, polyetheresteramide, polycarbonate-esteramide and polyether-b-amide, the mass percentage is controlled to be 91-98.9%, and further, the aspect ratio of the nylon elastomer is 1: 38.
wherein, the graft comprises one or more of maleic anhydride, acrylic acid, epoxy resin, oxazoline, modified polyacrylate and isocyanate, and the mass percentage is controlled to be 1-8%.
Wherein the cross-linking agent comprises one or more of dicumyl peroxide, benzoyl peroxide, di-tert-butyl peroxide and dicumyl hydroperoxide, and the mass percent is controlled to be 0.1-1%.
The invention also provides a preparation method of the plastic impregnated powder, which comprises the following steps:
1) adding a nylon elastomer into a container of a double-screw extruder, wherein the nylon elastomer can be directly purchased from the market or prepared in a polymerization kettle (the temperature of the nylon elastomer is about 230 ℃ or 250 ℃ after the polymerization is finished, and the nylon elastomer is in a liquid state and is transferred into the container of the double-screw extruder);
2) keeping the temperature of the container at 215-225 ℃ (preferably 220 ℃), the pressure at 0.25-0.35MPa (preferably 0.3MPa), and keeping the temperature for 1-2 h;
3) then reducing the temperature to 205 ℃ and 214 ℃ (preferably 210 ℃), keeping the pressure at 0.25-0.35MPa (preferably 0.3MPa), and keeping the temperature for 1-2 h;
4) then the temperature is reduced to 175-185 ℃ (preferably 180 ℃), the pressure is kept at 0.25-0.35MPa (preferably 0.3MPa), and the temperature is kept for 1-2h, at this time, the nylon elastomer is in a solid state;
5) adding the graft and the cross-linking agent into the container according to the proportion, mixing, and uniformly mixing and reacting the raw materials;
6) then reducing the temperature to 165-174 ℃ (preferably 170 ℃), keeping the pressure at 0.25-0.35MPa (preferably 0.3MPa), and preserving the temperature for 1-2 h;
7) then reducing the temperature to 155-164 ℃ (preferably 162 ℃), keeping the pressure at 0.25-0.35MPa (preferably 0.3MPa), and keeping the temperature for 1-2 h;
8) then keeping the temperature at 158-162 ℃ (preferably 160 ℃), the pressure at 0.25-0.35MPa (preferably 0.3MPa), 1-2 h;
9) dicing the cooled semi-finished product by using a double-screw extruder;
10) and grinding into powder by using a liquid nitrogen cryogenic grinding machine to obtain the plastic impregnated powder.
The molding powder provided in the present application will be further described with reference to the following examples.
Example 1
The plastic-impregnated powder provided by the embodiment comprises 91g of nylon elastomer (prepared), 8g of maleic anhydride (produced by Shanghai Jinhui plastication Co., Ltd.), and 1g of dicumyl peroxide (produced by Nanjing Waals mechanical science and technology Co., Ltd.). The plastic-impregnated powder in the embodiment is prepared by the following preparation method:
firstly, the preparation of the nylon elastomer is carried out by the following steps:
1) preparation of nylon block: preparing raw materials: 100g of laurolactam, 50g of quinic acid, 30g of quinidiamine, 10g of hexamethylene diamine, 0.1g of phosphotriester and 150g of deionized water. Adding the materials into a reaction kettle, heating to 150 ℃, maintaining for 4 hours, heating to 270 ℃, maintaining the pressure in the kettle at 1.5MPa, controlling the stirring speed at about 60rpm, and reacting for 6 hours to prepare the nylon block.
2) Preparation of the active block: preparing raw materials: 120g of polyether polyol with the molecular weight of 200-3000, 30g of adipic acid, 0.2g of p-toluenesulfonic acid and 35g of water. Adding the materials into a reactor, heating to 220 ℃, controlling the stirring speed at about 150rpm, reacting for 3 hours, vacuumizing to 800mmHg, and reacting for 4 hours to prepare the active block.
3) 200g of the nylon block prepared above and 180g of the living block were put into a polymerization vessel together with 0.5g of phosphoric triester and 20g of water, and reacted at 270 ℃ and 50rpm for 7 hours to obtain a nylon elastomer.
Then, the preparation of the plastic impregnated powder is carried out, and the steps are as follows:
transferring the polymerized nylon elastomer from a polymerization kettle to a container of a double-screw extruder, keeping the temperature in the container at 220 ℃, keeping the temperature for 1h, then reducing the temperature to 210 ℃, keeping the temperature for 1h, then reducing the temperature to 180 ℃, keeping the temperature for 1h, adding the maleic anhydride and the dicumyl peroxide into the container according to the proportion, mixing, then reducing the temperature to 170 ℃, keeping the temperature for 1h, then reducing the temperature to 162 ℃, keeping the temperature for 1h, then keeping the temperature at 160 ℃ for 1h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, cutting the cooled semi-finished product into particles by using the double-screw extruder, grinding the particles into powder by using a liquid nitrogen flour mill deep freezer, and obtaining the plastic-impregnated powder.
In the implementation, the polymerized nylon elastomer (in a liquid state) is used as a raw material and is directly used for preparing the plastic-impregnated powder, no precedent is existed in the market, the preparation method reasonably utilizes the heat energy of the just polymerized nylon elastomer, and a small-amplitude cooling process of the molten nylon elastomer is used for replacing a large-amplitude heating process of the normal-temperature nylon elastomer, so that the energy is saved, the production cost is reduced, and the integrated manufacture of the nylon elastomer and the plastic-impregnated powder is realized.
Example 2
The components for preparing the molding powder provided in this example include 98.9g of nylon elastomer (polyetheresteramide manufactured by Nanjing Shengya plastics science and technology Co., Ltd.), 1g of acrylic acid (made by Aite (Shandong) New Material Co., Ltd.), and 0.1g of benzoyl peroxide (manufactured by Haiying chemical Co., Ltd., Togying). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to be 220 ℃, preserving heat for 2h, reducing the temperature to 210 ℃, preserving heat for 2h, reducing the temperature to 180 ℃, preserving heat for 2h, adding the acrylic acid and the benzoyl peroxide into the container according to the proportion, mixing, reducing the temperature to 170 ℃, preserving heat for 2h, reducing the temperature to 162 ℃, preserving heat for 2h, maintaining the temperature at 160 ℃ for 2h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, cutting the cooled semi-finished product into particles by the double-screw extruder, and grinding the particles into powder by a liquid nitrogen deep cooling grinder to obtain the plastic impregnated powder.
Example 3
The components for preparing the molding powder provided by this example include 96.8g of nylon elastomer (polycarbonate-ester amide manufactured by Nanjing Shengya plastics science and technology Co., Ltd.), 3g of epoxy resin (manufactured by Hebei Lu Yun anticorrosive materials Co., Ltd.), and 0.2g of di-tert-butyl peroxide (manufactured by Naixiang chemical Co., Ltd., Tanzhou). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to 220 ℃, preserving heat for 1.5h, reducing the temperature to 210 ℃, preserving heat for 1.5h, reducing the temperature to 180 ℃, preserving heat for 1.5h, adding the epoxy resin and the di-tert-butyl peroxide into the container according to the proportion, mixing, reducing the temperature to 170 ℃, preserving heat for 1.5h, reducing the temperature to 162 ℃, preserving heat for 1.5h, maintaining the temperature at 160 ℃ for 1.5h, keeping the pressure in the container to be 0.3MPa all the time in the whole temperature reduction process, cutting the cooled semi-finished product into particles by using the double-screw extruder, grinding the particles into powder by using a liquid nitrogen deep cooling machine, and preparing the plastic impregnated powder.
Example 4
The components for preparing the plastic-dipped powder provided in this example include 95.2g of nylon elastomer (polyether-b-amide manufactured by Nanjing Sheng sub plastics science and technology Co., Ltd.), 5g of modified polyacrylate (manufactured by Idle New materials Co., Ltd.), and 0.8g of hydrogen peroxide diisopropylbenzene (Zibowin chemical Co., Ltd.). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: will in the container of double screw extruder is put into to the nylon elastomer, set for 220 ℃ with the temperature in the container, keep warm for 1h, drop to 210 ℃ again, keep warm for 1h, drop to 180 ℃ again, keep warm for 1h, will according to the ratio modified polyacrylate with hydrogen peroxide diisopropylbenzene adds in the container, mixes, drops to 170 ℃ again, keeps warm for 1h, drops to 162 ℃ again, keeps warm for 1h, keeps 160 ℃ for 1h again, keeps the container internal pressure to be 0.25MPa all the time in whole cooling process, cuts the semi-manufactured goods after the cooling with double screw extruder, grinds into the powder with liquid nitrogen cryrogenic milling machine, makes plastic impregnated powder.
Example 5
The components for preparing the molding powder provided in this example include 98g of nylon elastomer (polycarbonate-ester amide manufactured by Nanjing Sheng ya plastics science and technology Co., Ltd.), 4g of oxazoline (Han-Luo-New Material Co., Ltd., Shanghai) and 0.5g of di-tert-butyl peroxide (manufactured by Shanghai-Xiang chemical Co., Ltd., Taizhou). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to be 220 ℃, preserving heat for 1h, reducing the temperature to 210 ℃, preserving heat for 1h, reducing the temperature to 180 ℃, preserving heat for 1h, adding the oxazoline and the di-tert-butyl peroxide into the container according to the proportion, mixing, reducing the temperature to 170 ℃, preserving heat for 1h, reducing the temperature to 162 ℃, preserving heat for 1h, maintaining the temperature at 160 ℃ for 1h, keeping the pressure in the container to be 0.35MPa all the time in the whole cooling process, cutting the cooled semi-finished product into particles by the double-screw extruder, and grinding the particles into powder by a liquid nitrogen cryogenic grinder to obtain the plastic impregnated powder.
Example 6
The components for preparing the molding powder provided in this example include 100g of nylon elastomer (polyether-b-amide manufactured by Nanjing Sheng ya plastics science and technology Co., Ltd.), 5g of isocyanate (manufactured by Shandong Hengdeli polyurethane Co., Ltd.), and 0.5g of diisopropylbenzene hydroperoxide (Zibo Sheng Ying chemical Co., Ltd.). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to 215 ℃, preserving heat for 1h, reducing the temperature to 205 ℃, preserving heat for 1h, reducing the temperature to 175 ℃, preserving heat for 1h, adding the isocyanate and the hydrogen peroxide diisopropylbenzene into the container according to the proportion, mixing, reducing the temperature to 165 ℃, preserving heat for 1h, reducing the temperature to 155 ℃, preserving heat for 1h, maintaining the temperature at 158 ℃ for 1h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, cutting the cooled semi-finished product into particles by the double-screw extruder, grinding the particles into powder by a liquid nitrogen cryogenic grinder, and preparing the plastic impregnated powder.
Example 7
The components for preparing the plastic-impregnated powder provided by this example include 98g of nylon elastomer (polycarbonate-ester amide manufactured by Nanjing Shengya plastics science and technology Co., Ltd.), 4g of oxazoline (Vast Sailou New Material Co., Ltd. in Shanghai) and epoxy resin (Vast Sailou anticorrosive Material Co., Ltd. in Hebei), and 0.5g of di-tert-butyl peroxide (manufactured by Nalo chemical Co., Ltd. in Tazhou). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to 225 ℃, preserving heat for 1h, cooling to 214 ℃, preserving heat for 1h, cooling to 185 ℃, preserving heat for 1h, adding the oxazoline, the epoxy resin and the di-tert-butyl peroxide into the container according to the proportion, mixing, cooling to 174 ℃, preserving heat for 1h, cooling to 164 ℃, preserving heat for 1h, keeping the temperature at 162 ℃ for 1h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, cutting the cooled semi-finished product into granules by using the double-screw extruder, and grinding into powder by using a liquid nitrogen cryogenic grinding machine to obtain the plastic-impregnated powder.
Example 8
The components for preparing the molding powder provided in this example include 100g of nylon elastomer (polyether-b-amide manufactured by Nanjing Sheng ya plastics science and technology Co., Ltd.), 5g of isocyanate (manufactured by Shandong Hengdeli polyurethane Co., Ltd.) and 5g of modified polyacrylate (manufactured by Ette New Material Co., Ltd.), and 0.5g of dicumyl peroxide (manufactured by Zibo Sheng chemical Co., Ltd.). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to 220 ℃, preserving heat for 1h, reducing the temperature to 210 ℃, preserving heat for 1h, reducing the temperature to 180 ℃, preserving heat for 1h, adding the isocyanate, the modified polyacrylate and the dicumyl peroxide into the container according to the proportion, mixing, reducing the temperature to 170 ℃, preserving heat for 1h, reducing the temperature to 162 ℃, preserving heat for 1h, maintaining the temperature at 160 ℃ for 1h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, granulating the cooled semi-finished product by using the double-screw extruder, and grinding the semi-finished product into powder by using a liquid nitrogen cryogenic pulverizer to obtain the plastic-impregnated powder.
Example 9
The components for preparing the plastic-impregnated powder provided by this embodiment include 100g of nylon elastomer (a mixture of polyester amide and polyether-b-amide produced by Nanjing Shengya plastics science and technology Co., Ltd.), 4g of maleic anhydride (produced by Shanghai Jinhui plastication Co., Ltd.), and 0.4g of dicumyl peroxide (produced by Nanjing Waals chemical technology Co., Ltd.). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to be 220 ℃, preserving heat for 1h, reducing the temperature to 210 ℃, preserving heat for 1h, reducing the temperature to 180 ℃, preserving heat for 1h, adding the maleic anhydride and the dicumyl peroxide into the container according to the proportion, mixing, reducing the temperature to 170 ℃, preserving heat for 1h, reducing the temperature to 162 ℃, preserving heat for 1h, maintaining the temperature at 160 ℃ for 1h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, cutting the cooled semi-finished product into particles by the double-screw extruder, and grinding the particles into powder by a liquid nitrogen cryogenic grinder to obtain the plastic impregnated powder.
Example 10
The components for preparing the molding powder provided in this example include 100g of nylon elastomer (a mixture of polyester amide and polyether-b-amide manufactured by Nanjing Shengya plastics science and technology Limited), 4g of oxazoline (Vast Hanlo new materials Limited in Shanghai) and epoxy resin (Hebei Luyun anticorrosive materials Limited), and 0.4g of dicumyl peroxide (manufactured by Nanjing Wa mechanical engineering science and technology Limited) and benzoyl peroxide (manufactured by Beijing chemical industry Limited in Tokyo City). The plastic-impregnated powder in the embodiment is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to be 220 ℃, preserving heat for 1h, cooling to 210 ℃, preserving heat for 1h, cooling to 180 ℃, preserving heat for 1h, adding the oxazoline, the epoxy resin and the dicumyl peroxide into the container according to the proportion, mixing, cooling to 170 ℃, preserving heat for 1h, cooling to 162 ℃, preserving heat for 1h, keeping the temperature at 160 ℃ for 1h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, cutting the cooled semi-finished product into granules by using the double-screw extruder, and grinding into powder by using a liquid nitrogen cryogenic grinding machine to obtain the plastic-impregnated powder.
Comparative example 1
The components for preparing the plastic-impregnated powder provided by the comparative example comprise 100g of nylon elastomer (polycarbonate-ester amide produced by Nanjing Shengya plastics science and technology Co., Ltd.), 0.8g of epoxy resin (produced by Hebei Lu Yun anticorrosive material Co., Ltd.), and 0.5g of di-tert-butyl peroxide (produced by Naixiang chemical Co., Ltd., Tanzhou). The plastic-impregnated powder in the comparative example is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to 220 ℃, preserving heat for 1h, reducing the temperature to 210 ℃, preserving heat for 1h, reducing the temperature to 180 ℃, preserving heat for 1h, adding the epoxy resin and the di-tert-butyl peroxide into the container according to the proportion, mixing, reducing the temperature to 170 ℃, preserving heat for 1h, reducing the temperature to 162 ℃, preserving heat for 1h, maintaining the temperature at 160 ℃ for 1h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, cutting the cooled semi-finished product into particles by the double-screw extruder, grinding the particles into powder by a liquid nitrogen cryogenic grinder, and preparing the plastic impregnated powder.
Comparative example 2
The components for preparing the plastic-impregnated powder provided by the comparative example comprise 100g of nylon elastomer (a mixture of polyester amide and polyether-b-amide produced by Nanjing Shengya plastics science and technology Limited), 10g of maleic anhydride (produced by Shanghai Jinhui Daplasting Limited) and 0.4g of dicumyl peroxide (produced by Nanjing Waals force science and technology Limited). The plastic-impregnated powder in the comparative example is prepared by the following preparation method: putting the nylon elastomer into a container of a double-screw extruder, setting the temperature in the container to be 220 ℃, preserving heat for 1h, reducing the temperature to 210 ℃, preserving heat for 1h, reducing the temperature to 180 ℃, preserving heat for 1h, adding the maleic anhydride and the dicumyl peroxide into the container according to the proportion, mixing, reducing the temperature to 170 ℃, preserving heat for 1h, reducing the temperature to 162 ℃, preserving heat for 1h, maintaining the temperature at 160 ℃ for 1h, keeping the pressure in the container to be 0.3MPa all the time in the whole cooling process, cutting the cooled semi-finished product into particles by the double-screw extruder, and grinding the particles into powder by a liquid nitrogen cryogenic grinder to obtain the plastic impregnated powder.
Comparative example 3
The molding powder (manufactured by middle-linked plastic products Co., Ltd.) was purchased from the market.
The plastic-impregnated powders of the above examples 1 to 10 and comparative examples 1 to 3 were subjected to performance tests, respectively, and the test results are shown in the following table:
| test example | Adhesion (grade) |
| Example 1 | Level 0 |
| Example 2 | Level 0 |
| Example 3 | Level 0 |
| Example 4 | Level 0 |
| Example 5 | Level 0 |
| Example 6 | Level 0 |
| Example 7 | Level 0 |
| Example 8 | Level 0 |
| Example 9 | Level 0 |
| Example 10 | Level 0 |
| Comparative example 1 | Level 1 |
| Comparative example 2 | Level 1 |
| Comparative example 3 | Grade 3 |
From the above test results, it can be seen that the impregnating powder provided in the above examples 1 to 10 of the present application can have higher adhesive force, regardless of whether compared with the impregnating powder (comparative example 1) having a relatively low graft content ratio in the preparation component, compared with the impregnating powder (comparative example 2) having a relatively high graft content ratio in the preparation component, or compared with the conventional commercially available impregnating powder (comparative example 3), so that after the impregnating powder is prepared into a coating layer, the coating layer is not easily separated from the adhered body, and the protective and decorative effects of the coating layer are ensured.
In addition, the embodiment of the invention also provides a using method of the plastic dipping powder, which comprises the following steps:
1) derusting and deoiling a workpiece, and heating to 350 +/-50 ℃;
2) taking a proper amount of the plastic-impregnated powder, and preheating to 200-300 ℃;
3) uniformly spraying the preheated plastic-impregnated powder on a heated workpiece to form a coating layer, specifically, spraying the coating layer on the surface of the workpiece by using air supplied by compressed air, wherein the thickness of the coating layer is controlled to be about 0.4 mu m as a preferred embodiment, and under the thickness, the coating layer has stronger impact resistance and longer protection period;
4) and naturally cooling the workpiece.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The plastic-impregnated powder is characterized by mainly comprising the following components in percentage by mass:
1-8% of graft;
0.1 to 1 percent of cross-linking agent;
91-98.9% of nylon elastomer.
2. The plastic-impregnated powder according to claim 1 wherein the graft comprises one or more of maleic anhydride, acrylic, epoxy, oxazoline, modified polyacrylate, isocyanate.
3. The plastic-impregnated powder of claim 1 wherein the cross-linking agent comprises one or more of dicumyl peroxide, benzoyl peroxide, di-t-butyl peroxide, and dicumyl hydroperoxide.
4. The molding compound of claim 1, wherein the nylon elastomer comprises one or more of a polyesteramide, polyetheresteramide, polycarbonate-esteramide, polyether-b-amide.
5. A plastic-impregnated powder according to any one of claims 1 to 4, which is prepared from the following components in percentage by mass: 3-5% of a graft; 0.2 to 0.8 percent of cross-linking agent; 95.2 to 96.8 percent of nylon elastomer.
6. The molding powder according to claim 5, which is prepared from the following components in percentage by mass: 4% of a graft; 0.5% of a crosslinking agent; and 95.5% of nylon elastomer.
7. A process for the preparation of an moulding compound according to any of claims 1 to 6, characterized in that it comprises the following steps:
adding a molten nylon elastomer into a reaction vessel, and cooling the molten nylon elastomer to form a solid nylon elastomer;
adding the graft and the cross-linking agent into the reaction vessel according to the proportion, uniformly mixing and reacting;
and cooling a product obtained by the reaction to a target temperature, and then cutting into granules and grinding to obtain the plastic impregnated powder.
8. The method of claim 7, wherein the step of cooling the molten nylon elastomer to form a solid nylon elastomer comprises: firstly, keeping the temperature in the reaction container at 215-225 ℃, keeping the temperature for 1-2h, then cooling to 205-214 ℃, keeping the temperature for 1-2h, then cooling to 175-185 ℃, keeping the temperature for 1-2h, thereby forming a solid nylon elastomer;
the step of cooling the product obtained by the reaction to a target temperature comprises: the temperature of the reaction vessel is reduced to 165-174 ℃, the temperature is kept for 1-2h, then the temperature is reduced to 155-164 ℃, the temperature is kept for 1-2h, and finally the temperature is kept at 158-162 ℃ for 1-2 h.
9. The method of claim 8, wherein the step of cooling the molten nylon elastomer to form a solid nylon elastomer comprises: firstly, keeping the temperature in the reaction container at 220 ℃ for 1h, then cooling to 210 ℃, keeping the temperature for 1h, then cooling to 180 ℃, and keeping the temperature for 1h, thereby forming a solid nylon elastomer;
the step of cooling the product obtained by the reaction to a target temperature comprises: and cooling the reaction container to 170 ℃, preserving the heat for 1h, cooling to 162 ℃, preserving the heat for 1h, and finally preserving the temperature for 1h at 160 ℃.
10. The process for the production of molding powder according to claim 9, wherein the pressure in the reaction vessel is maintained at 0.25 to 0.35MPa during the cooling.
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| US20040002729A1 (en) * | 1996-10-08 | 2004-01-01 | Zamore Alan M. | Irradiation conversion of thermoplastic to thermoset polymers |
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