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Method of rubbery polymer and rubber reinforced thermoplastics using the same

A polymer and rubber-like technology, which is applied in the field of preparing rubber-like polymers and rubber-reinforced thermoplastic resin compositions prepared using the same, can solve the problems of impact resistance and surface performance degradation of injection molding materials, and degradation of processing conditions, etc.

Active Publication Date: 2012-01-11
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, due to the large size and thinning of electronic products, the internal structure of electronic products can be complicated these days, so when they are injection molded, the processing conditions may be deteriorated, and insufficient shell formation leads to deterioration of impact resistance and surface properties of injection molding materials

Method used

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  • Method of rubbery polymer and rubber reinforced thermoplastics using the same
  • Method of rubbery polymer and rubber reinforced thermoplastics using the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] a) Preparation of rubbery polymer

[0017] The way of injecting monomers according to the present invention can be selectively applied in consideration of final particle size and preparation of particle distribution. Based on 100 parts by weight of the total monomers, 5 to 70 parts by weight of the monomers are injected at one time at the beginning of the reaction, and 30 to 95 parts by weight of the remaining monomers are added by continuous injection. According to this, when the content of the monomer added by continuous injection in the total monomer is less than 30 parts by weight, the control of the particle distribution according to the initial heat has no effect due to the increase in the portion of the monomer injected at one time at the beginning of the reaction; when When the content of the monomer added by continuous injection exceeds 95 parts by weight in the total monomer, there is an advantage in controlling the heat of polymerization, but the particle siz...

Embodiment 1

[0058] Preparation of Rubbery Polymer A1

[0059] After injecting 50 parts by weight of ion-exchanged water into a reactor for pressurized reaction replaced by nitrogen, inject potassium carbonate of 0.8 parts by weight of fatty acid, potassium abietate of 1.0 parts by weight and potassium carbonate of 1.0 parts by weight at room temperature, Then stir. Inject 40 parts by weight of 1,3-butadiene, 0.3 parts by weight of tertiary dodecyl mercaptan, 0.8 parts by weight of polyethylene glycol diacrylate and 0.3 parts by weight of dicumyl hydroperoxide, react The temperature was increased to 40°C, followed by 6 hours. When the polymerization conversion rate reached 60%, 15 parts by weight of 1,3-butadiene was further injected over 20 minutes, and then the reaction temperature was raised to 55°C. Then, 45 parts by weight of 1,3-butadiene was continuously injected over 8 hours, and the reaction temperature was raised to 75°C when the conversion rate was 80%. Here, at the start o...

Embodiment 2

[0065] Preparation of rubbery polymer A2

[0066] After injecting 50 parts by weight of ion-exchanged water in the reactor for pressurized reaction replaced by nitrogen, inject potassium carbonate of 0.8 parts by weight of fatty acid, potassium abietate of 1.0 parts by weight and potassium carbonate of 1.0 parts by weight at room temperature, Then stir. After injecting 40 parts by weight of butyl acrylate, 0.5 parts by weight of ethylene glycol diacrylate, 0.3 parts by weight of tertiary dodecyl mercaptan and 0.3 parts by weight of dicumyl hydroperoxide, the reaction temperature was raised to 40 °C, followed by 6 hours. When the polymerization conversion rate reached 60%, 15 parts by weight of butyl acrylate was further injected over 20 minutes, and then the reaction temperature was raised to 55°C. Then, 45 parts by weight of 1,3-butadiene was continuously injected over 8 hours, and the reaction temperature was raised to 75°C when the conversion rate was 80%. Here, when t...

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Abstract

Disclosed is a method of manufacturing a rubbery polymer having an excellent impact resistance and heat stability, and a rubber reinforced thermoplastic resin composition using the same, in which for the method of manufacturing the rubbery polymer having an average particle diameter of 2500 to 4000 AA, a gel content of 70 to 90 %, and a glass transition temperature up to 0 DEG C, 5 to 70 parts by weight of monomers are injected in one time and 30 to 95 parts by weight of the monomers are added by continuous injection, based on 100 parts by weight of total monomer that is injected for manufacturing the rubbery polymer. Therefore, using the method of the present invention easily performs the control of the particle diameter and the distribution the heat of polymerization. In addition, the polymerization productivity and the production stability of the rubbery resin can be improved and also the impact resistance and the processing heat stability of the rubber reinforced thermoplastic resin composition using the same can be largely improved.

Description

technical field [0001] The present invention relates to a method for preparing a rubber-like polymer and a rubber-reinforced thermoplastic resin composition prepared using the method, and more particularly, the present invention relates to a method for preparing a rubber-like polymer and a rubber-reinforced thermoplastic resin composition prepared using the method. A thermoplastic resin composition in which, when using emulsion polymerization for a rubber-reinforced thermoplastic resin composition (which is used as a raw material for impact resistance), by injecting a part of the monomer from the total monomer at the beginning of the reaction, and then continuously The rubber-like polymer can effectively control the particle diameter and the heat of polymerization when processed by injecting the remaining monomers, and can greatly improve the impact resistance of the thermoplastic resin composition using the method and the thermoplastic resin composition using the method therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F236/06C08F279/02C08F279/04C08F2/24C08L25/12C08L25/14C08L69/00C08L67/02C08L27/06C08L51/04C08L55/02
CPCC08F236/04C08F279/02C08L55/02C08F220/18C08F2222/1013C08F279/06C08L51/04C08F2/001C08F2/22C08F265/06C08L25/12C08F2222/108C08L2205/03C08L27/06C08F279/04C08F236/06C08F285/00C08L25/14C08F265/04C08F220/1804C08L2666/24C08F212/08C08F220/44C08F222/102C08F2/24
Inventor 蔡周秉郑有城安凤根韩元悳俞根勋李灿弘
Owner LG CHEM LTD
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