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Preparation method of aromatic vinyl-unsaturated nitrile copolymer and prepared aromatic vinyl-unsaturated nitrile copolymer

An aromatic vinyl, unsaturated technology, applied in the preparation of aromatic vinyl-unsaturated nitrile copolymers and the field of prepared aromatic vinyl-unsaturated nitrile copolymers, can solve the problem of low oligomer content , Lack of impact resistance and heat resistance

Active Publication Date: 2020-07-07
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although aromatic vinyl-unsaturated nitrile copolymers having excellent impact resistance or excellent impact resistance and heat resistance have been developed through extensive research, there is a lack of research on excellent impact resistance and heat resistance. Development of aromatic vinyl-unsaturated nitrile copolymers with low oligomer content and excellent surface properties

Method used

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  • Preparation method of aromatic vinyl-unsaturated nitrile copolymer and prepared aromatic vinyl-unsaturated nitrile copolymer
  • Preparation method of aromatic vinyl-unsaturated nitrile copolymer and prepared aromatic vinyl-unsaturated nitrile copolymer

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preparation example Construction

[0023] Specifically, the preparation method of the aromatic vinyl-unsaturated nitrile copolymer according to one embodiment of the present invention includes: adding aromatic vinyl monomers with a weight ratio of 65:35 to 78:22 to the reaction solvent monomers and unsaturated nitrile monomers to prepare a mixed solution, by adding to the mixed solution a polymerization initiator comprising an organic peroxide having a half-life temperature of 100° C. to 120° C. so that based on 100 parts by weight of all monomers , the content of the polymerization initiator is in the range of 0.01 parts by weight to 0.08 parts by weight, and then the polymerization is carried out at 115°C to 135°C so that the monomer conversion rate is more than 80%, to prepare the step of the polymerization product (step 1); and The polymerized product is subjected to a devolatilization process to prepare an oligomer content of less than 0.5 parts by weight (based on 100 parts by weight of the copolymer), a r...

Embodiment 1

[0062]A mixed solution was prepared by dissolving 71 parts by weight of styrene and 29 parts by weight of acrylonitrile in toluene (TLN). Here, toluene was used in an amount of 25 parts by weight based on 100 parts by weight of the total weight of all monomers. Furthermore, 0.05 parts by weight of 1,1-bis(tert-butylperoxy)cyclohexane as a polymerization initiator and 0.21 parts by weight of tert-dodecylmercaptan (TDDM) as a molecular weight regulator, and copolymerized at a reaction temperature of 130°C. The obtained polymer product was subjected to a devolatilization process at a temperature of 230° C. and a pressure of 20 Torr to prepare a styrene-acrylonitrile (SAN) copolymer.

[0063] Mix 73 parts by weight of the SAN copolymer thus prepared with 27 parts by weight of ABS DP (polybutadiene grafted with SAN), 0.25 parts by weight of antioxidant and 0.7 parts by weight of lubricant, and prepare heat-resistant permanent resin composition. The heat-resistant resin compositi...

Embodiment 2 to 5

[0065] Each SAN copolymer and heat-resistant resin composition were prepared in the same manner as in Example 1 except that the materials were used in the amounts listed in Table 1 below.

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Abstract

The present invention provides a method of preparing an aromatic vinyl-unsaturated nitrile-based copolymer in which, when an aromatic vinyl-unsaturated nitrile-based copolymer in which a content of a structural unit derived from unsaturated nitrile monomers in the copolymer is in the range of 22 to 30 wt% is prepared, oligomer content and unreacted monomer content are decreased, resulting in excellent heat resistance, significantly improved surface quality, and particularly, reduced generation of residue on a product surface when used in a closed high temperature environment and reduced occurrence of mold deposits during injection molding, and an aromatic vinyl-unsaturated nitrile-based copolymer prepared using the method.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2016-0034167 filed on Mar. 22, 2016, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The invention relates to a preparation method of an aromatic vinyl-unsaturated nitrile copolymer and an aromatic vinyl-unsaturated nitrile copolymer prepared by the preparation method. In the preparation method, excellent heat-resistant and significantly improved surface quality, in particular, due to the reduction in the content of oligomers and unreacted monomers, it is possible to reduce the generation of residues on the surface of the product when used in a closed high-temperature environment, and reduce the injection molding process. Generation of mold deposits. Background technique [0004] In general, heat-resistant styrenic copolymers, for example, aromatic vinyl-unsaturat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/10C08F2/44C08F214/10C08F6/10C08F2/38C08F297/04C08K5/14
CPCC08F2/06C08F2/38C08F2/44C08F4/36C08F6/003C08F212/10C08L25/12C08K5/14C08L55/02C08F6/10C08F212/08C08F214/10C08F297/04
Inventor 李大雨韩昌薰徐在范朴晶台金圭善
Owner LG CHEM LTD
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