Flame-retardant polyester resin composition

• US 6,180,251 B1
• Filed: 03/22/2000
• Issued: 01/30/2001
• Est. Priority Date: 03/24/1999
• Status: Expired due to Term

• Current Assignee: Polyplastics Co., Ltd. (Daicel Corporation)
• Original Assignee: Polyplastics Co., Ltd. (Daicel Corporation)
• Inventors: Kanai, Hiroyuki, Aoki, Kei, Katsumata, Toru
• Primary Examiner(s): Acquah, Samuel A.
• Application Number:
  US09/533,382
• Time in Patent Office: 314 Days
• Field of Search: 525/63, 525/64, 525/65, 525/68, 525/69, 525/70, 525/71, 525/74, 525/78, 525/165, 525/174, 525/185, 525/240, 525/242, 525/445, 525/437, 524/444, 524/469, 524/492, 524/502, 524/504, 524/513, 428/457, 428/480
• US Class Current: 428/457
• CPC Class Codes: C08K 5/12 of cyclic polycarboxylic acids
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 51/00 Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds for ABS polymers C08L55/02; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 67/025 containing polyether sequences
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C09K 21/00 Fireproofing materials for use in a particular application, see the relevant places, e.g. fireproofing of wood B27K, of polymers C08, of textiles D06M, of paper D21H; fireproof paints C09D5/18
• CPC Class Codes: C09K 21/14 Macromolecular materials
• CPC Class Codes: Y10T 428/31678 Of metal
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

A thermoplastic resin having such a sufficient heat shock resistance that it is unbroken by common temperature changes and also exhibiting an excellent flame resistance when applied to an insert molded article, which is obtained by blending a thermoplastic polyester resin (A) with 1-25% by weight to the total amount of the composition of an impact resistance giving agent (B), 1-50% by weight to the total amount of the composition of an inorganic filler (C), 1-25% by weight to the total amount of the composition of a flame retardant (D) and 0.1-10% by weight to the total amount of the composition of an aromatic polyvalent carboxylate (E).

Claims

1. A flame-retardant polyester resin composition comprising, based on the total composition weight:

(A) 20-96.9% by weight of a thermoplastic polyester resin;

(B) 1-25% by weight of an impact resistance agents;

(C) 1-50% by weight of an inorganic filler;

(D) 1-25% by weight of a flame retardant; and

(E) 0.1-10% by weight of an aromatic polyvalent carboxylate.

2. The composition of claim 1, wherein the thermoplastic polyester resin (A) comprises polybutylene terephthalate.

3. The composition of claim 1, wherein the aromatic polyvalent carboxylate (E) is at least one selected from the group consisting of a trimellitate and a pyromellitate.

4. The composition of claim 1, wherein the impact resistance agent (B) is at least one selected from the group consisting of thermoplastic elastomers and core shell polymers.

5. The composition of claim 4, wherein the thermoplastic elastomer is at least one selected from the group consisting of olefin-, styrene-, polyester-, polyamide- and urethane-based elastomers.

6. The composition of claim 1, wherein the impact resistance agent (B) is a graft copolymer in which a copolymer of ethylene with an alkyl unsaturated carboxylate is chemically bonded either in a branched or cross-linking structure with one or more polymer(s) or copolymer(s) mainly comprising a repeating unit represented by the following formula (1):

(in the formula, R is hydrogen or a lower alkyl group; and

X is at least one selected from the group consisting of —

COOH, —

COOCH₃, —

COOC₂H₅, —

COOC₄H₉, —

COOCH₂CH(C₂H₅)C₄H₉,

and —

CN).

7. An insert molded article comprising the composition of claim 1 which is insert molded with a metal or an inorganic solid.