ASA-based resin composition, molded article including ASA-based resin composition, and method of manufacturing molded article

Patent metadata

Field	Value
Publication number	US-12371559-B2
Application number	US-202017435511-A
Country	US
Kind code	B2
Filing date	Sep 28, 2020
Priority date	Oct 7, 2019
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

Disclosed is an ASA resin composition, a molded article including the ASA resin composition, and a method of manufacturing the molded article. Also disclosed is an ASA resin composition including 20 to 47% by weight of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer containing acrylate rubber having an average particle diameter of 50 to 150 nm as a core; 23 to 55% by weight of an alkyl methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer; and 25 to 45% by weight of a poly(alkyl methacrylate) resin, a molded article including the ASA resin composition, and a method of manufacturing the molded article. Also disclosed is an ASA resin composition having excellent colorability and transparency even at a processing thickness of a predetermined value while having excellent mechanical properties and processability, a molded article including the ASA resin composition, and a method of manufacturing the molded article are provided.

First claim

The invention claimed is:

1. A resin composition, comprising:
20 to 30% by weight of an aromatic vinyl compound-vinyl cyanide compound graft copolymer comprising acrylate rubber having an average particle diameter of 50 to 150 nm as a core;
30 to 40% by weight of an alkyl methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer; and
30 to 40% by weight of a poly(alkyl methacrylate) resin,
wherein the aromatic vinyl compound-vinyl cyanide compound graft copolymer comprises 40 to 60% by weight of the acrylate rubber, 25 to 45% by weight of a first aromatic vinyl compound, and 10 to 20% by weight of a first vinyl cyanide compound,
wherein the alkyl methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer comprises 45 to 65% by weight of an alkyl methacrylate, 25 to 35% by weight of a second aromatic vinyl compound, and 10 to 20% by weight of a second vinyl cyanide compound,
wherein the resin composition has a total rubber content of 10 to 15% by weight, as measured by Fourier-transform infrared spectroscopy (FTIR),
wherein a weight ratio of the graft copolymer to the alkyl methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer is 1:1 to 1:2,
wherein the resin composition has an Izod impact strength (¼ inch, 23° C.) of 3 to 8 kgf·cm/cm 2 according to ASTM D256, and
wherein the resin composition has a weather resistance of 1.3 or less according to ASTM J1960.

2. The resin composition according to claim 1 , wherein the alkyl methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer has a weight average molecular weight of 10,000 to 150,000 g/mol, as measured by gel permeation chromatography (GPC).

3. The resin composition according to claim 1 , wherein the poly(alkyl methacrylate) resin is a polymer comprising an alkyl methacrylate containing an alkyl group having 1 to 15 carbon atoms.

4. The resin composition according to claim 1 , wherein the poly(alkyl methacrylate) resin has a weight average molecular weight of 50,000 to 200,000 g/mol, as measured by gel permeation chromatography (GPC).

5. The resin composition according to claim 1 , further comprising one or more of a lubricant, a heat stabilizer, and a UV stabilizer in an amount of 0.05 to 5 parts by weight.

6. A molded article manufactured using the resin composition according to claim 1 .

7. The molded article according to claim 6 , wherein the molded article is an exterior material, a finishing material, a non-painted product, or an extrusion profile.

8. A method of manufacturing a molded article, the method comprising:
kneading and extruding the resin composition according to claim 1 under conditions of 200 to 300° C. and 100 to 500 rpm to prepare a pellet; and
manufacturing a molded article by performing sheet molding or injection molding of the prepared pellet at a molding temperature of 200 to 300° C.

Assignees

• Lg Chemical Ltd

Inventors

• An Yong Hee
• Kim Tae Hoon
• Park Chun Ho
• Sung Da Eun
• Cho Wangrae
• Kim Ho Hoon
• Jang Jeongmin

Classifications

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L33/12 Primary

  Homopolymers or copolymers of methyl methacrylate · CPC title

• B29K2096/02

  Graft polymers · CPC title

• B29K2033/12

  Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate · CPC title

• B29B11/10

  Extrusion moulding · CPC title