IP Library › Granted Patent US 12679967
Granted Patent B2
US 12679967 · App. 18/034,253 · Granted Jul 14, 2026

Thermoplastic resin composition

Inventors: Jeong Su Choi (Daejeon, KR); Won Seok Lee (Daejeon, KR); Roo Da Lee (Daejeon, KR); Sang Hoo Park (Daejeon, KR); Jong Ju Lee (Daejeon, KR)
Assignee: LG CHEM, LTD.
C08L51/04C08F212/08C08F220/14C08F220/44C08L9/06C08L2207/53
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Quick Facts
Patent No.
US 12679967
App. No.
18/034,253
Granted
Jul 14, 2026
Kind
B2
Abstract

The present disclosure relates to a thermoplastic resin composition which includes: a graft polymer including a rubber polymer having a gel content of 0 to 10 wt % and including an aromatic vinyl-based monomer unit and a diene-based monomer unit; and a shell including a (meth)acrylate-based monomer unit and an aromatic vinyl-based monomer unit which are grafted to the rubber polymer; and a non-grafted polymer including 90 wt % or more of a (meth)acrylate-based monomer unit.

Claims (25)

1 . A thermoplastic resin composition comprising:

a graft polymer including a rubber polymer having a gel content of 0 to 10 wt % and including an aromatic vinyl-based monomer unit and a diene-based monomer unit; and a shell including a (meth)acrylate-based monomer unit and an aromatic vinyl-based monomer unit, which are grafted to the rubber polymer; and

a non-grafted polymer including 90 wt % or more of a (meth)acrylate-based monomer unit,

wherein the gel content is obtained from a method that comprises:

coagulating the rubber polymer with a diluted acid or metal salt to obtain a rubber mass,

cutting the rubber mass to prepare a 1 g rubber section,

placing the rubber section into 100 g of toluene to separate a sol and a gel, and

calculating the gel content from Equation (I):

Gel content (wt %)=Weight of gel/Weight of rubber section×100   (I).

2 . The thermoplastic resin composition of claim 1 , wherein the rubber polymer has the gel content of 0 to 5 wt %.

3 . The thermoplastic resin composition of claim 1 , wherein the rubber polymer includes the aromatic vinyl-based monomer unit and the diene-based monomer unit in a weight ratio of 10:90 to 35:65.

4 . The thermoplastic resin composition of claim 1 , wherein the rubber polymer has an average particle diameter of 20 to 100 nm.

5 . The thermoplastic resin composition of claim 1 , wherein the graft polymer includes, based on 100 wt % of a total weight of the graft polymer:

30.0 to 65.0 wt % of the rubber polymer;

10.0 to 55.0 wt % of the (meth)acrylate-based monomer unit; and

5.0 to 40.0 wt % of the aromatic vinyl-based monomer unit.

6 . The thermoplastic resin composition of claim 1 , wherein the non-grafted polymer further includes one or more of a (meth)acrylic acid-based monomer unit and an aromatic vinyl-based monomer unit.

7 . The thermoplastic resin composition of claim 1 , comprising, based on 100 wt % of a total weight of the thermoplastic resin composition:

10.0 to 50.0 wt % of the graft polymer; and

50.0 to 90.0 wt % of the non-grafted polymer.

8 . The thermoplastic resin composition of claim 1 , wherein the shell of the graft polymer includes a vinyl cyanide-based monomer unit grafted to the rubber polymer.

9 . The thermoplastic resin composition of claim 1 , comprising, based on 100 wt % of a total weight of the thermoplastic resin composition:

5.0 to 25.0 wt % of the rubber polymer;

60.0 to 90.0 wt % of the (meth)acrylate-based monomer unit; and

3.0 to 20.0 wt % of the aromatic vinyl-based monomer unit.