CN114409696B - Stabilizer for reclaimed material processing and PC reclaimed material comprising same - Google Patents
Stabilizer for reclaimed material processing and PC reclaimed material comprising same Download PDFInfo
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- CN114409696B CN114409696B CN202210157683.6A CN202210157683A CN114409696B CN 114409696 B CN114409696 B CN 114409696B CN 202210157683 A CN202210157683 A CN 202210157683A CN 114409696 B CN114409696 B CN 114409696B
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/21—Cyclic compounds having at least one ring containing silicon, but no carbon in the ring
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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Abstract
The invention relates to a stabilizer for reclaimed material processing and PC reclaimed materials containing the stabilizer, wherein the stabilizer is prepared by bonding organosilicon (namely cyclopentasiloxane) and 2-methylallylamine through hydrosilylation reaction in a water system solvent state, the preparation process is good in repeatability, the prepared stabilizer is used as a raw material for preparing the PC reclaimed materials, the anti-aging performance of the reclaimed materials can be effectively improved through interaction with other components, the reclaimed materials can be favorably inhibited from being degraded under the action of light, heat and other radiation or easily-corrodible substances contacting with the solvent, and the toughness of the reclaimed materials can be effectively enhanced, so that the defects that the existing PC reclaimed materials are easy to crack and have poor toughness at low temperature can be overcome, and meanwhile, the hydrolysis resistance and scratch resistance of the reclaimed materials can be remarkably improved.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and relates to a stabilizer for processing reclaimed materials and PC reclaimed materials comprising the stabilizer.
Background
Polycarbonate (PC) is a thermoplastic amorphous engineering plastic, which contains carbonate groups in the molecular chain, has excellent impact strength, thermal stability, glossiness, bacteria inhibition property, flame retardant property and pollution resistance, and has good dimensional stability and electrical insulation property, and therefore, has been widely used in the fields of electronics, electricity, automobiles and the like.
Nowadays, with the large use of polycarbonate materials, a lot of waste materials are generated, which undoubtedly brings a great burden to environmental management due to the poor natural degradation capability of the polycarbonate materials. For the treatment of PC waste materials, a burning or landfill mode is generally adopted in the past, but harmful gas is generated in the burning process, so that serious environmental pollution is caused; the method of landfill is adopted, so that the method is difficult to degrade, and can cause great harm to the environment, and simultaneously cause soil waste. In order to achieve the purposes of saving world resources, protecting environment and saving energy, recycling the PC waste materials is not slow, and is a main development trend in the future. The reclaimed materials are produced by recycling waste materials, and various corresponding products can be manufactured by utilizing the reclaimed materials according to different requirements of the products. However, a large amount of additives are added in the processing process of the PC product to ensure the performance of the product, and the resin and the additives are changed under the influence of external conditions in the use process, so that the waste material of the product cannot be simply used as a new material. If only simple recycling is adopted without corresponding material modification, the quality uniformity of the obtained PC reclaimed material is poor, the ageing resistance and the solvent resistance cannot meet the most basic use requirements, and in addition, the PC reclaimed material is easy to oxidize and degrade to a large extent under the action of heat, ultraviolet and other radiation or corrosive substances contacting with solvents and the like, so that the PC reclaimed material is fast in self mechanical strength attenuation and cannot be normally used. Therefore, there is a need to develop a stabilizer suitable for preparing PC reclaimed materials, which is used for improving the quality of reclaimed materials and making the reclaimed materials exert the maximum use value.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the stabilizer capable of obviously improving the processing and using performances of the PC reclaimed materials, which is beneficial to promoting the recycling of the PC waste materials, reducing the production cost and improving the economic benefit, thereby avoiding the resource loss and the burden on the environment caused by the discarding of the waste materials.
The aim of the invention can be achieved by the following technical scheme:
according to one aspect of the present invention, there is provided a stabilizer for reclaimed material processing, which is prepared by a method comprising the steps of:
step (1): adding 2-methylallylamine and deionized water into a reactor at normal temperature, sequentially adding an emulsifier, a dispersing agent and a buffering agent into the reactor while stirring, then heating the reactor to 52-65 ℃ at an I heating rate, slowly dropwise adding organic acid into the reactor, and continuing to react for 1-2h after the dropwise addition is finished;
step (2): heating the reactor to 70-85 ℃ at the II heating rate, adding the catalyst, stirring for 1-5min, slowly dripping cyclopentasiloxane into the reactor, and continuing to react for 2-4h after dripping is finished;
step (3): heating the reactor to 105-110 ℃ at the III heating rate, adding solid alkali into the reactor, and continuing to react for 1-2h at 110-120 ℃ to obtain the stabilizer.
As a preferred embodiment of the invention, the mass ratio of the 2-methylallylamine and the deionized water in the step (1) is 1 (2-5).
As a preferred embodiment of the present invention, the amount of the emulsifier added in the step (1) is 4 to 10% by mass of 2-methylallylamine.
As a preferred embodiment of the present invention, the dispersant is added in the amount of 0.2 to 2% by mass of 2-methylallylamine in the step (1).
As a preferred embodiment of the present invention, the buffer is added in the amount of 0.1 to 1% by mass of 2-methylallylamine in the step (1).
As a preferred embodiment of the present invention, the molar ratio of the organic acid to 2-methylallylamine in the step (1) is (1-1.5): 1 and the dropping time is 2-4 hours.
As a preferred embodiment of the present invention, the emulsifier is a nonionic emulsifier; illustratively, the emulsifier is selected from at least one of polyoxyethylene ether, polyoxypropylene ether, or polyvinyl alcohol.
As a preferred embodiment of the invention, the dispersing agent in the step (1) comprises methylpentanol and polyethylene glycol 400 in a mass ratio of 1 (1-3).
As a preferred embodiment of the present invention, the buffering agent in step (1) is selected from at least one of hydroxymethyl cellulose or hydroxypropyl cellulose.
As a preferred embodiment of the present invention, the organic acid in step (1) is a saturated monocarboxylic acid; illustratively, the organic acid is selected from at least one of acetic acid, propionic acid, or butyric acid.
As a preferred embodiment of the present invention, the catalyst in the step (2) is a platinum catalyst, and the catalyst is added in an amount of 0.01 to 0.2% by mass of 2-methylallylamine.
As a preferred embodiment of the present invention, the molar ratio of the cyclopentasiloxane to 2-methylallylamine in the step (2) is (0.5-1): 1, and the dropwise addition time of the cyclopentasiloxane is 1-2 hours.
As a preferred embodiment of the present invention, the solid base in step (3) is selected from NaOH or KOH and the molar ratio of the solid base to 2-methylallylamine is (1-1.2): 1.
As a preferred embodiment of the invention, the temperature rise rate of the first step is 5-10 ℃/min, the temperature rise rate of the second step is 3-6 ℃/min, and the temperature rise rate of the third step is 1-3 ℃/min.
According to another aspect of the present invention, there is provided a PC regrind comprising the above-mentioned stabilizer.
As a preferred embodiment of the present invention, the PC regrind comprises: 100 parts of PC recycling crushed material, 1-6 parts of stabilizer, 0.2-1 part of antioxidant, 0.1-0.5 part of metal passivator and 2-8 parts of plasticizer.
As a preferred embodiment of the present invention, the PC recovery pulverized material is a pulverized material of 95% purity, 400 mesh, and the melt index of the PC recovery pulverized material is 10-35g/10min (300 ℃ C., 1.2 kg).
As a preferred embodiment of the present invention, the antioxidant is selected from at least one of diphenyl phosphite, tetraphenyl dipropylene glycol bisphosphite, pentaerythritol diisodecyl diphosphate, triphenyl phosphite or pentaerythritol phosphate.
As a preferred embodiment of the present invention, the metal deactivator is at least one of N-salicylidene-N-salicyloyl hydrazine or bis [ ethyl-3- (3, 5-di-t-butyl-4-hydroxyphenyl) ]2, 2-oxamide.
As a preferred embodiment of the present invention, the plasticizer is at least one selected from sorbitol, epoxidized soybean oil, epoxidized butyl furoate or acetyl tributyl citrate.
The preparation of the PC reclaimed material comprises the following steps:
step one: drying the PC recycling crushed material at 120-130 ℃ to ensure that the water content is less than or equal to 0.05%;
step two: uniformly mixing a stabilizer, an antioxidant, a metal passivator and a plasticizer according to a proportion to prepare a premix;
step three: feeding the PC reclaimed crushed material through a main feeding port of a double-screw extruder, feeding the premix through a side feeding port of the double-screw extruder, carrying out melt blending, and extruding, cooling, cutting and granulating to obtain the PC reclaimed material.
As a preferred embodiment of the present invention, the process parameters of the twin-screw extruder are as follows:
the temperature of the first area is 170-190 ℃, the temperature of the second area is 215-230 ℃, the temperatures of the third area, the fourth area and the fifth area are 235-250 ℃, the temperature of the sixth area is 215-230 ℃, the temperature of the die head is 250-260 ℃, and the rotating speed of the screw is 200-600r/min.
Compared with the prior art, the invention has at least the following beneficial effects:
the stabilizer is prepared by bonding organic silicon (namely cyclopentasiloxane) and 2-methylallylamine through hydrosilylation reaction in a water-based solvent state, the preparation process is good in repeatability, the prepared stabilizer can be used as a preparation raw material of PC reclaimed materials, and through interaction with other components, the stabilizer has high-activity functional groups, can form a moderate crosslinking structure among polycarbonate molecular chains, is beneficial to improving the ageing resistance of the PC reclaimed materials, is beneficial to inhibiting degradation of the reclaimed materials under the action of irradiation such as illumination, heat and the like or perishable substances such as solvents, and is beneficial to enhancing the toughness of the reclaimed materials under the low-temperature condition due to the introduction of the organosiloxane structure, so that the defects of easy embrittlement and poor toughness of the existing PC reclaimed materials under the low temperature can be overcome, and in addition, the hydrolysis resistance and scratch resistance of the reclaimed materials are also remarkably improved. Furthermore, the PC regenerated material prepared by using the stabilizer disclosed by the invention has excellent mechanical property and ageing resistance, can be used for replacing new materials, reduces the burden on the environment caused by discarding waste materials, reduces the production burden of enterprises, and has a good application prospect.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below in connection with specific embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed embodiment and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present invention.
As used herein, the term "about" when used to modify a numerical value means a margin of error measured within + -5% of the numerical value.
The theory or mechanism described and disclosed herein, whether right or wrong, is not meant to limit the scope of the invention in any way, i.e., the present disclosure may be practiced without limitation to any particular theory or mechanism. The present invention will be described in detail with reference to specific examples.
Example 1:
the embodiment provides a stabilizer I, which is prepared by a method comprising the following steps:
step (1): adding 2-methylallylamine and deionized water into a reactor at normal temperature, sequentially adding an emulsifying agent, a dispersing agent and a buffering agent into the reactor while stirring, then heating the reactor to 52 ℃ at a heating rate of 10 ℃/min, slowly dropwise adding organic acid into the reactor, and continuing to react for 2 hours after the dropwise addition is finished;
step (2): heating the reactor to 70 ℃ at a heating rate of 3 ℃/min, adding a catalyst, stirring for 5min, slowly dripping cyclopentasiloxane into the reactor, and continuing to react for 4h after dripping is finished;
step (3): heating the reactor to 105 ℃ at a heating rate of 1 ℃/min, adding solid alkali into the reactor, and continuing to react for 2 hours at 110 ℃ to obtain the stabilizer I.
In the preparation process, the following steps are adopted:
aiming at the step (1), wherein the mass ratio of the 2-methylallylamine to the deionized water is 1:2; the emulsifier is polyoxyethylene ether, and the addition amount of the emulsifier is 4% of the mass of the 2-methylallylamine; the dispersing agent is compounded by methyl amyl alcohol and polyethylene glycol 400 according to the mass ratio of 1:1, and the adding amount of the dispersing agent is 0.2% of the mass of 2-methylallylamine; the buffer used is hydroxymethyl cellulose, and the addition amount of the buffer is 0.1% of the mass of the 2-methylallylamine; the organic acid used was acetic acid in a molar ratio to 2-methylallylamine of 1:1 and a dropping time of 2h.
Aiming at the step (2), the catalyst is a platinum catalyst, the addition amount of the catalyst is 0.01% of the mass of the 2-methylallylamine, the molar ratio of the cyclopentasiloxane to the 2-methylallylamine is 0.5:1, and the dropwise adding time of the cyclopentasiloxane is 1h.
For step (3), wherein the solid base used is NaOH and the molar ratio of NaOH to 2-methylallylamine is 1.2:1.
Example 2:
the embodiment provides a stabilizer II, which is prepared by a method comprising the following steps:
step (1): adding 2-methylallylamine and deionized water into a reactor at normal temperature, sequentially adding an emulsifying agent, a dispersing agent and a buffering agent into the reactor while stirring, then heating the reactor to 56 ℃ at a heating rate of 5 ℃/min, slowly dropwise adding organic acid into the reactor, and continuing to react for 1.8h after the dropwise addition is finished;
step (2): heating the reactor to 77 ℃ at a heating rate of 6 ℃/min, adding a catalyst, stirring for 1min, slowly dripping cyclopentasiloxane into the reactor, and continuing to react for 3.6h after dripping is finished;
step (3): heating the reactor to 110 ℃ at a heating rate of 3 ℃/min, adding solid alkali into the reactor, and continuing to react for 2 hours at 120 ℃ to obtain the stabilizer II.
In the preparation process, the following steps are adopted:
aiming at the step (1), wherein the mass ratio of the 2-methylallylamine to the deionized water is 1:2.5; the emulsifier is polyvinyl alcohol, and the addition amount of the emulsifier is 6% of the mass of the 2-methylallylamine; the dispersing agent is compounded by methyl amyl alcohol and polyethylene glycol 400 according to the mass ratio of 1:1.5, and the adding amount of the dispersing agent is 0.8% of the mass of 2-methylallylamine; the buffer used is hydroxymethyl cellulose, and the addition amount of the buffer is 0.4% of the mass of the 2-methylallylamine; the organic acid used was acetic acid, its molar ratio to 2-methylallylamine was 1.5:1, and the addition time was 4h.
Aiming at the step (2), the catalyst is a platinum catalyst, the addition amount of the catalyst is 0.05 percent of the mass of the 2-methylallylamine, the molar ratio of the cyclopentasiloxane to the 2-methylallylamine is 0.6:1, and the dropwise adding time of the cyclopentasiloxane is 2 hours.
For step (3), wherein the solid base used is NaOH and the molar ratio of NaOH to 2-methylallylamine is 1:1.
Example 3:
the embodiment provides a stabilizer III, which is prepared by a method comprising the following steps:
step (1): adding 2-methylallylamine and deionized water into a reactor at normal temperature, sequentially adding an emulsifier, a dispersing agent and a buffering agent into the reactor while stirring, then heating the reactor to 60 ℃ at a heating rate of 6 ℃/min, slowly dropwise adding organic acid into the reactor, and continuing to react for 1h after the dropwise addition is finished;
step (2): heating the reactor to 82 ℃ at a heating rate of 5 ℃/min, adding a catalyst, stirring for 3min, slowly dripping cyclopentasiloxane into the reactor, and continuing to react for 2.5h after dripping is finished;
step (3): heating the reactor to 108 ℃ at a heating rate of 2 ℃/min, adding solid alkali into the reactor, and continuing to react for 1.5h at 116 ℃ to obtain the stabilizer III.
In the preparation process, the following steps are adopted:
aiming at the step (1), wherein the mass ratio of the 2-methylallylamine to the deionized water is 1:4; the emulsifier is polyoxypropylene ether, and the addition amount of the emulsifier is 8% of the mass of the 2-methylallylamine; the dispersing agent is compounded by methyl amyl alcohol and polyethylene glycol 400 according to the mass ratio of 1:2, and the adding amount of the dispersing agent is 1.4% of the mass of 2-methylallylamine; the buffer used is hydroxymethyl cellulose, and the addition amount of the buffer is 0.8% of the mass of the 2-methylallylamine; the organic acid used was propionic acid, its molar ratio to 2-methylallylamine was 1:1, and the dropping time was 3h.
Aiming at the step (2), the catalyst is a platinum catalyst, the addition amount of the catalyst is 0.1 percent of the mass of the 2-methylallylamine, the molar ratio of the cyclopentasiloxane to the 2-methylallylamine is 0.8:1, and the dropwise adding time of the cyclopentasiloxane is 2 hours.
For step (3), wherein the solid base used is KOH and the molar ratio of KOH to 2-methylallylamine is 1:1.
Example 4:
the embodiment provides a stabilizer IV, which is prepared by a method comprising the following steps:
step (1): adding 2-methylallylamine and deionized water into a reactor at normal temperature, sequentially adding an emulsifying agent, a dispersing agent and a buffering agent into the reactor while stirring, then heating the reactor to 65 ℃ at a heating rate of 8 ℃/min, slowly dropwise adding organic acid into the reactor, and continuing to react for 1.2h after the dropwise addition is finished;
step (2): heating the reactor to 85 ℃ at a heating rate of 4 ℃/min, adding a catalyst, stirring for 2min, slowly dripping cyclopentasiloxane into the reactor, and continuing to react for 4h after dripping is finished;
step (3): heating the reactor to 110 ℃ at a heating rate of 1 ℃/min, adding solid alkali into the reactor, and continuing to react for 2 hours at 120 ℃ to obtain the stabilizer IV.
In the preparation process, the following steps are adopted:
aiming at the step (1), wherein the mass ratio of the 2-methylallylamine to the deionized water is 1:5; the emulsifier is polyoxypropylene ether, and the addition amount of the emulsifier is 10% of the mass of the 2-methylallylamine; the dispersing agent is compounded by methyl amyl alcohol and polyethylene glycol 400 according to the mass ratio of 1:3, and the adding amount of the dispersing agent is 2% of the mass of 2-methylallylamine; the buffer used is hydroxypropyl cellulose, and the addition amount of the buffer is 1% of the mass of the 2-methylallylamine; the organic acid used was butyric acid, the molar ratio of which to 2-methylallylamine was 1:1, and the addition time was 2h.
Aiming at the step (2), the catalyst is a platinum catalyst, the addition amount of the catalyst is 0.2% of the mass of the 2-methylallylamine, the molar ratio of the cyclopentasiloxane to the 2-methylallylamine is 1:1, and the dropwise addition time of the cyclopentasiloxane is 2h.
For step (3), wherein the solid base used is KOH and the molar ratio of KOH to 2-methylallylamine is 1:1.
The invention also provides a PC regenerated material prepared by adopting the stabilizer, and the specific formula is shown in the table 1.
TABLE 1
| Project | PC recycling crushed material | Stabilizing agent | Antioxidant | Metal passivating agent | Plasticizer(s) |
| Product 1 | 100 | 1 | 0.2 | 0.1 | 2 |
| Product 2 | 100 | 3 | 0.4 | 0.2 | 5 |
| Product 3 | 100 | 4 | 0.8 | 0.4 | 6 |
| Product 4 | 100 | 6 | 1 | 0.5 | 8 |
In the products shown in Table 1:
in the product 1, the PC recycling crushed material is crushed material with the purity of 95 percent and the granularity of 400 meshes, the melt index of the PC recycling crushed material is 10g/10min (300 ℃,1.2 kg), the stabilizer is stabilizer I, the antioxidant is tetraphenyl dipropylene glycol diphosphite, the metal passivating agent is N-salicylidene-N-salicyloyl hydrazine, and the plasticizer is epoxidized soybean oil;
in the product 2, the PC recycling crushed material is crushed material with the purity of 95 percent and the granularity of 400 meshes, the melt index of the PC recycling crushed material is 16g/10min (300 ℃,1.2 kg), the stabilizer is stabilizer II, the antioxidant is triphenyl phosphite, the metal passivating agent is N-salicylidene-N-salicyloyl hydrazine, and the plasticizer is epoxy furfuryl butyl oleate;
in the product 3, the PC recycling crushed material is crushed material with the purity of 95 percent and 400 meshes, the melt index of the PC recycling crushed material is 28g/10min (300 ℃,1.2 kg), the stabilizer is stabilizer III, the antioxidant is pentaerythritol phosphate, the metal passivating agent is bis [ ethyl-3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ]2, 2-oxamide, and the plasticizer is formed by mixing sorbitol and acetyl tributyl citrate according to the mass ratio of 1:1;
in the product 4, the PC recovery crushed material is crushed material with the purity of 95 percent and 400 meshes, the melt index of the PC recovery crushed material is 35g/10min (300 ℃ C., 1.2 kg), the stabilizer is stabilizer IV, the antioxidant is pentaerythritol diisodecyl diphosphite, the metal passivating agent is bis [ ethyl-3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ]2, 2-oxamide, and the plasticizer is epoxidized soybean oil, epoxy furoic acid butyl ester and acetyl tributyl citrate according to the mass ratio of 1:1:2.
The products 1-4 (PC regenerated material) are all prepared by the following steps:
step one: drying the PC recycling crushed material at 120-130 ℃ to ensure that the water content is less than or equal to 0.05%;
step two: uniformly mixing a stabilizer, an antioxidant, a metal passivator and a plasticizer according to a proportion to prepare a premix;
step three: feeding the PC reclaimed crushed material through a main feeding port of a double-screw extruder, feeding the premix through a side feeding port of the double-screw extruder, carrying out melt blending, and extruding, cooling, cutting and granulating to obtain the PC reclaimed material.
The specific process parameters involved in the preparation process are shown in table 2.
TABLE 2
| Project | Product 1 | Product 2 | Product 3 | Product 4 |
| Drying temperature | 120℃ | 125℃ | 128℃ | 130℃ |
| One zone temperature | 170℃ | 176℃ | 182℃ | 190℃ |
| Two zone temperature | 215℃ | 219℃ | 224℃ | 230℃ |
| Three zone temperature | 235℃ | 238℃ | 242℃ | 240℃ |
| Four zone temperature | 242℃ | 241℃ | 245℃ | 247℃ |
| Five zone temperature | 246℃ | 245℃ | 248℃ | 250℃ |
| Six zone temperature | 215℃ | 219℃ | 224℃ | 230℃ |
| Die temperature | 250℃ | 252℃ | 254℃ | 260℃ |
| Screw speed | 200r/min | 360r/min | 500r/min | 600r/min |
The following provides a control product, and the specific technical scheme is as follows:
control product:
the comparative product differs from product 3 in that it does not contain stabilizer III, the remainder being identical to product 3.
The results of the performance tests for the above products 1-4 and the control product are shown in Table 3.
TABLE 3 Performance test results
Note that: in Table 3 the tensile strength test is carried out with reference to ISO1183, the impact strength test is carried out with reference to ISO 180 and the ageing performance of the xenon lamp is carried out with reference to PV1303/5 p.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (6)
1. The stabilizer for processing the reclaimed materials is characterized by being prepared by a method comprising the following steps:
step (1): adding 2-methylallylamine and deionized water into a reactor at normal temperature, sequentially adding an emulsifier, a dispersing agent and a buffering agent into the reactor while stirring, then heating the reactor to 52-65 ℃ at an I heating rate, slowly dropwise adding organic acid into the reactor, and continuing to react for 1-2h after the dropwise addition is finished;
step (2): heating the reactor to 70-85 ℃ at the II heating rate, adding the catalyst, stirring for 1-5min, slowly dripping cyclopentasiloxane into the reactor, and continuing to react for 2-4h after dripping is finished;
step (3): heating the reactor to 105-110 ℃ at the III heating rate, adding solid alkali into the reactor, and continuing to react for 1-2h at 110-120 ℃ to obtain the stabilizer;
in the step (1) described above, the step of (c) is performed,
the molar ratio of the organic acid to the 2-methylallylamine is (1-1.5): 1;
the dripping time of the organic acid is 2-4h; the dispersing agent comprises methyl amyl alcohol and polyethylene glycol 400 with the mass ratio of (1-3);
the emulsifier is a nonionic emulsifier;
the organic acid is at least one of acetic acid, propionic acid or butyric acid;
the emulsifier is at least one selected from polyoxyethylene ether, polyoxypropylene ether or polyvinyl alcohol;
the organic acid is saturated monocarboxylic acid;
the buffering agent is at least one selected from hydroxymethyl cellulose or hydroxypropyl cellulose;
in the step (2), the step of (c),
the catalyst is a platinum catalyst;
the addition amount of the catalyst is 0.01-0.2% of the mass of the 2-methylallylamine;
in the step (3), the step of (c),
the solid base is selected from at least one of NaOH or KOH;
the molar ratio of the solid alkali to the 2-methylallylamine is (1-1.2): 1.
2. The stabilizer for reclaimed material processing as claimed in claim 1, wherein in the step (1),
the mass ratio of the 2-methylallylamine to the deionized water is 1 (2-5); and/or the number of the groups of groups,
the addition amount of the emulsifier is 4-10% of the mass of the 2-methylallylamine; and/or the number of the groups of groups,
the addition amount of the dispersing agent is 0.2-2% of the mass of the 2-methylallylamine; and/or the number of the groups of groups,
the addition amount of the buffer is 0.1-1% of the mass of the 2-methylallylamine.
3. The stabilizer for reclaimed material processing as claimed in claim 1, wherein in the step (2),
the molar ratio of the cyclopentasiloxane to the 2-methylallylamine is (0.5-1): 1; and/or the number of the groups of groups,
the dripping time of the cyclopentasiloxane is 1-2h.
4. The stabilizer for reclaimed material processing as claimed in claim 1, wherein the I-th temperature rise rate is 5-10 ℃/min; and/or the number of the groups of groups,
the heating rate of the second step is 3-6 ℃/min and/or,
the temperature rising rate of the third layer is 1-3 ℃/min.
5. A PC reclaimed material, characterized in that the PC reclaimed material comprises: 100 parts of PC recycling crushed material, 1-6 parts of the stabilizer as set forth in any one of claims 1-4, 0.2-1 part of antioxidant, 0.1-0.5 part of metal deactivator and 2-8 parts of plasticizer.
6. The PC reclaimed material of claim 5, wherein the PC recycle crushed material is 95% pure, 400 mesh crushed material; and/or the number of the groups of groups,
the melt index of the PC recycling crushed material at 300 ℃ under the load of 1.2kg is 10-35g/10min, and/or the antioxidant is selected from at least one of diphenyl phosphite, tetraphenyl dipropylene glycol diphosphite, pentaerythritol diisodecyl diphosphate, triphenyl phosphite or pentaerythritol phosphate, and/or,
the metal passivating agent is N-salicylidene-N-salicylhydrazide or bis [ ethyl-3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ]2, 2-oxamide, and/or,
the plasticizer is at least one of sorbitol, epoxidized soybean oil, epoxidized butyl furoate or acetyl tributyl citrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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