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Core-shell copolymer, preparation method therefor, and thermoplastic resin composition comprising same

A thermoplastic resin and copolymer technology, applied in the field of core-shell copolymers, can solve the problems of low-temperature impact strength degradation and low glass transition temperature

Active Publication Date: 2020-10-20
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, when acrylic rubber resin is used as an impact modifier to increase the impact strength of polycarbonate resin, polycarbonate resin has excellent weather resistance and coloring properties, but has a low glass transition temperature, making low-temperature impact Strength deterioration

Method used

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  • Core-shell copolymer, preparation method therefor, and thermoplastic resin composition comprising same
  • Core-shell copolymer, preparation method therefor, and thermoplastic resin composition comprising same
  • Core-shell copolymer, preparation method therefor, and thermoplastic resin composition comprising same

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preparation example Construction

[0054]

[0055] The preparation method of the core-shell copolymer according to the present invention may comprise: by making polydimethylsiloxane containing a first (meth)acrylate monomer having 1 to 8 carbon atoms and a terminal modification A core-shell copolymer is prepared by polymerizing a nucleating mixture of a prepared core; and a core-shell copolymer is prepared by polymerizing a shell-forming mixture in the presence of the prepared core, wherein the end-modified polydimethylsiloxane is in polydimethylsiloxane Both ends of the base siloxane contain modified moieties derived from a second alkyl (meth)acrylate monomer. The prepared core may have an average particle diameter of 150 nm to 500 nm.

[0056] The preparation method of the core-shell copolymer may include stepwise preparing the core and the shell by separately preparing the core and preparing the core-shell copolymer, and then polymerizing the core and the shell. The core of the core-shell copolymer can be...

Embodiment 1

[0078]

[0079] Add 50 parts by weight of distilled water based on a total of 100 parts by weight of seeds, 0.9 parts by weight of sodium lauryl sulfate (SLS), 11 parts by weight of n-butyl acrylate (BA) and 0.05 parts by weight of part of allyl methacrylate (AMA), and the internal temperature of the reactor was raised to 50°C. When the internal temperature of the reactor reached 50°C, 0.005 parts by weight of ferrous sulfate (FeS), 0.03 parts by weight of disodium ethylenediaminetetraacetic acid (EDTA), 0.25 parts by weight of formaldehyde sulfoxylate were added in batches sodium (SFS) and 0.04 parts by weight of tert-butyl hydroperoxide (TBHP), and reacted for 1 hour.

[0080] In another reactor, 50 parts by weight of distilled water, 0.45 parts by weight of sodium lauryl sulfate, 88.5 parts by weight of butyl acrylate, and 0.45 parts by weight of allyl methacrylate were added to prepare a pre-emulsion as a monomer. At an internal temperature of 50°C, 0.01 parts by weight...

Embodiment 2

[0090] Except in the preparation of the core, 1.0 parts by weight of the end-modified polydimethylsiloxane crosslinking agent represented by formula 2 (n=69) was added to the nucleating monomer mixture instead of 1.0 parts by weight of Example 2 was carried out in the same manner as Example 1 except for the terminal-modified polydimethylsiloxane crosslinking agent (n=10) represented by 2.

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Abstract

The present invention relates to a core-shell copolymer and, more specifically, provides: a core-shell copolymer comprising a core, and a shell encompassing the core, wherein the core comprises a repeating unit derived from a C1-8 first alkyl (meth)acrylate monomer and a cross-linking part derived from an end-modified polydimethylsiloxane cross-linking agent, and the end-modified polydimethylsiloxane cross-linking agent comprises, at the both ends of polydimethylsiloxane, a modification part derived from a second alkyl (meth)acrylate monomer; a preparation method therefor; and a thermoplasticresin composition comprising same.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority of Korean Patent Application No. 10-2018-0142092 filed on November 16, 2018 and Korean Patent Application No. 10-2019-0141838 filed on November 7, 2019, both of which The entire content of the patent disclosure is incorporated into this specification by reference. technical field [0003] The present invention relates to a core-shell copolymer, more particularly, to a core-shell copolymer used as an impact modifier for a thermoplastic resin composition, a method for preparing the core-shell copolymer, and Thermoplastic resin composition of core-shell copolymer. Background technique [0004] Automobile exterior materials, mobile phone casings, etc. are often exposed to cold environments, and are easily exposed to light sources such as ultraviolet rays during use. In addition, these materials require high heat resistance to withstand the hot sun, as wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08L51/00C08L69/00
CPCC08F265/06C08L69/00C08F285/00C08L51/003C08L2207/53C08L51/04C08F220/1804C08F220/40C08F220/30C08F230/08C08F220/14C08L51/006C08F2810/20C08L2312/08B01J19/0066B01J19/18B01J23/30B01J23/462B01J2219/00033C07C29/132C07C31/202
Inventor 李惠林金伦皞柳基现
Owner LG CHEM LTD
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