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Preparation method of thermoplastic resin

A thermoplastic resin, water-soluble silicate technology, applied in the field of thermoplastic resin, can solve the problems of reduced productivity, reduced heat resistance, low reactivity and polymerization stability, and achieve the effect of excellent heat resistance

Active Publication Date: 2019-05-03
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, α-methylstyrene monomer has disadvantages such as lower reactivity and polymerization stability
When the content of α-methylstyrene is increased to overcome these disadvantages, the polymerization conversion rate decreases and, therefore, the productivity decreases
In addition, depending on the temperature conditions during polymerization, problems such as depolymerization and generation of oligomers arise, whereby heat resistance decreases

Method used

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  • Preparation method of thermoplastic resin
  • Preparation method of thermoplastic resin
  • Preparation method of thermoplastic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Add 140 parts by weight of ion-exchanged water, 70 parts by weight of α-methylstyrene monomer, 5 parts by weight of styrene, and 1.0 parts by weight of alkenyl alkanoic acid potassium salt in batches into a polymerization reactor filled with nitrogen Reactive emulsifier, 0.5 parts by weight of oleic acid potassium salt, 15 parts by weight of acrylonitrile, 0.1 parts by weight of sodium phosphate (Na 3 PO 4 ) electrolyte, 0.3 parts by weight of tert-dodecyl mercaptan (TDDM) molecular weight regulator, 0.05 parts by weight of tert-butyl hydroperoxide and 0.025 parts by weight of glucose fat-soluble polymerization initiator, 0.05 parts by weight of sodium pyrophosphate and 0.0005 parts by weight of ferrous sulfate, and carry out the first polymerization at a reaction temperature of 50° C. until the polymerization conversion rate reaches 40%. Subsequently, in order to improve the stability in the middle and late stages of the reaction and increase the polymerization conver...

Embodiment 2

[0103] In addition to sodium silicate (Na 2 SiO 3 ) was added to the emulsion-polymerized copolymer latex slurry coagulated with a metal salt coagulant instead of the emulsion-polymerized copolymer latex and stirred, a test was carried out in the same manner as in Example 1.

Embodiment 3

[0105] In addition to sodium silicate (Na 2 SiO 3 ) was added to the aged emulsion-polymerized copolymer latex slurry instead of the emulsion-polymerized copolymer latex and stirred, the test was carried out in the same manner as in Example 1.

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Abstract

The present invention relates to a kind of preparation method of thermoplastic resin, more particularly, relate to a kind of preparation method of thermoplastic resin, this preparation method comprises adding water-soluble silicate to α-methylstyrene-vinyl cyanide copolymer latex Compound and metal salt coagulant steps. The present invention has the effect of providing a method for preparing a thermoplastic resin excellent in heat resistance by adding additives when the α-methylstyrene-vinyl cyano copolymer latex is coagulated or solidified, and controlling the addition time of the additives.

Description

technical field [0001] The present invention relates to a kind of preparation method of thermoplastic resin, more particularly, relates to a method by adding additives in the process of coagulation and aging of α-methylstyrene-vinyl cyano compound copolymer latex, while controlling the addition of additives A point in time, a method to prepare a thermoplastic resin with excellent heat resistance. Background technique [0002] [Cross Reference to Related Application] [0003] This application claims the benefit of priority to Korean Patent Application No. 10-2015-0127187 filed at the Korean Intellectual Property Office on Sep. 08, 2015, the disclosure of which is incorporated herein by reference in its entirety. [0004] In general, acrylonitrile-butadiene-styrene (ABS) copolymer resins have excellent processability and excellent appearance characteristics due to containing styrene, rigidity and chemical resistance due to containing acrylonitrile, and have butadiene Impact ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/08C08L25/08C08K5/5415
CPCC08K5/5415C08L9/08C08L25/08C08L2201/08C08K2003/162C08F6/22C08K3/34C08L25/16C08K3/10C08K2003/3045C08F212/12C08L25/12C08F220/44C08F212/08C08L55/02C08J2300/22C08F2800/10C08J3/07C08K2003/343
Inventor 洪晟元李亨燮朱玟彻申珉承金仁秀
Owner LG CHEM LTD