Thermoplastic resin composition and molded product manufactured therefrom

Patent metadata

Field	Value
Publication number	US-12559618-B2
Application number	US-202017772696-A
Country	US
Kind code	B2
Filing date	Oct 28, 2020
Priority date	Oct 31, 2019
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

Provided are a thermoplastic resin composition and a molded product manufactured therefrom, the thermoplastic resin composition including (A) 10 to 40 wt % of an acrylic graft copolymer that includes a core including an acrylic rubbery polymer, and a shell formed by graft polymerization of a monomer to the core, the monomer including an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyanide compound, or a combination thereof; (B) 30 to 60 wt % of a polyalkyl (meth)acrylate resin; and (C) 10 to 40 wt % of an N-(substituted)maleimide-acrylic copolymer.

First claim

The invention claimed is:

1 . A thermoplastic resin composition, comprising
(A) 10 to 40 wt % of an acrylic graft copolymer that comprises a core comprising an acrylic rubbery polymer, and a shell formed by graft polymerization of a monomer to the core, the monomer including an aromatic vinyl compound and a vinyl cyanide compound, wherein the aromatic vinyl compound and the vinyl cyanide compound are in a weight ratio of 5:5 to 8:2; (B) 30 to 60 wt % of a polyalkyl (meth)acrylate resin; and (C) 10 to 40 wt % of an N-(substituted) maleimide-acrylic copolymer, wherein the acrylic rubbery polymer has an average particle diameter of 200 to 400 nm.

2 . The thermoplastic resin composition of claim 1 , wherein
the acrylic rubbery polymer is included in an amount of 20 to 60 wt % based on 100 wt % of the (A) acrylic graft copolymer.

3 . The thermoplastic resin composition of claim 1 , wherein
the acrylic rubbery polymer comprises a crosslinked polymer of an alkyl acrylate monomer comprising methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, hexyl acrylate, or a combination thereof, a crosslinked copolymer of the alkyl acrylate monomer and a styrene monomer, or a combination thereof.

4 . The thermoplastic resin composition of claim 1 , wherein
the core comprises an alkyl acrylate-styrene-based crosslinked copolymer, and the shell is formed by graft polymerization of the monomer including the alkyl (meth)acrylate to the core.

5 . The thermoplastic resin composition of claim 1 , wherein
the (B) polyalkyl (meth)acrylate resin has a weight average molecular weight of 10,000 to 200,000 g/mol.

6 . The thermoplastic resin composition of claim 1 , wherein
the (B) polyalkyl (meth)acrylate resin is polymer of a monomer including methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, glycidyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, cyclohexyl (meth)acrylate, or a combination thereof.

7 . The thermoplastic resin composition of claim 1 , wherein
the (C)N-(substituted) maleimide-acrylic copolymer has a glass transition temperature of 120 to 160° C.

8 . The thermoplastic resin composition of claim 1 , wherein
the (C)N-(substituted) maleimide-acrylic copolymer has a refractive index of 1.490 to 1.580.

9 . The thermoplastic resin composition of claim 1 , wherein
the (C)N-(substituted) maleimide-acrylic copolymer is a terpolymer of N-(substituted) maleimide-alkyl (meth)acrylate-aromatic vinyl compound.

10 . The thermoplastic resin composition of claim 9 , wherein
the N-(substituted) maleimide comprises N-methylmaleimide, N-ethylmaleimide, N-cyclohexylmaleimide, N-phenylmaleimide, or a combination thereof.

11 . The thermoplastic resin composition of claim 9 , wherein
the (C)N-(substituted) maleimide-acrylic copolymer has a weight average molecular weight of 10,000 to 300,000 g/mol.

12 . The thermoplastic resin composition of claim 1 , wherein
the thermoplastic resin composition further comprises (D) alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer in an amount of greater than 0 wt % and less than or equal to 20 wt %.

13 . The thermoplastic resin composition of claim 1 , further comprising
an additive comprising a flame retardant, a nucleating agent, a coupling agent, a filler, a plasticizer, a lubricant, an antibacterial agent, a release agent, a heat stabilizer, an antioxidant, an inorganic additive, an ultraviolet stabilizer, an antistatic agent, a pigment, and/or a dye.

14 . A molded product manufactured from the thermoplastic resin composition of claim 1 .

15 . The molded product of claim 14 , wherein the molded product has a notched Izod impact strength of a ¼ inch-thick specimen measured according to ASTM D256 of greater than or equal to 4 kgf cm/cm.

16 . The molded product of claim 14 , wherein
the molded product has a Vicat softening temperature measured according to ASTM D1525 of greater than or equal to 101° C.

17 . The molded product of claim 14 , wherein
the molded product has a lightness value (L*) measured according to ASTM E308 in a specular component excluded (SCE) method with respect to a black molded product of less than or equal to 3.

Assignees

• Lotte Chemical Corp

Inventors

• Kim In-Chol
• Shin Hyeongseob
• Kwon Keehae
• Hong Jaekeun

Classifications

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08L35/06

  Copolymers with vinyl aromatic monomers · CPC title

• C08L33/06 Primary

  of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical · CPC title

• C08F265/06

  Polymerisation of acrylate or methacrylate esters on to polymers thereof · CPC title

• C08L51/04 Primary

  grafted on to rubbers · CPC title