Hydrolytically stable, halogen-free flame retardant resin composition

• US 5,455,292 A
• Filed: 12/03/1993
• Issued: 10/03/1995
• Est. Priority Date: 08/06/1992
• Status: Expired due to Term

• Current Assignee: Asahi Kasei Kogyo Kabushiki Kaisha (Asahi Chemical Industry Company Limited)
• Original Assignee: Asahi Kasei Kogyo Kabushiki Kaisha (Asahi Chemical Industry Company Limited)
• Inventors: Takayama, Shigeki, Kakegawa, Junko
• Primary Examiner(s): Hamilton, III, Thomas
• Application Number:
  US08/162,038
• Time in Patent Office: 669 Days
• Field of Search: 524/141, 524/127, 524/143
• US Class Current: 524/141
• CPC Class Codes: C08K 5/523 with hydroxyaryl compounds

Abstract

The present invention provides a resin composition comprising:

(A) at least one thermoplastic resin not having halogen selected from the group consisting of a polyphenylene ether resin, a polycarbonate resin, a polystyrene resin, a polyolefin resin, a polyamide resin and a thermoplastic elastomer; and

(B) a phosphoric acid ester compound represented by general formula I: ##STR1## wherein Q₁, Q₂, Q₃ and Q₄ independently represent an alkyl group having 1 to 6 carbon atoms; R₁, R₂, R₃ and R₄ independently represent a methyl group or a hydrogen atom; n represents an integer of 1 or more; n1 and n2 independently represent an integer of 0 to 2; and m1, m2, m3 and m4 independently represent an integer of 1 to 3.

According to the present invention, a resin composition excellent in flame retardance can be obtained. A flame retardant agent contained in the resin composition does not cause smoking or volatilize during a molding processing and also does not bleed to the surface of the moldings. Moldings of the resin composition do not discolor, blister and deteriorate in electrical properties and the like due to water absorption.

Claims

1. A resin composition comprising:

(A) at least one thermoplastic resin not having halogen selected from the group consisting of a polyphenylene ether resin, a polycarbonate resin, a polystyrene resin, a polyolefin resin, a polyamide resin and a thermoplastic elastomer; and

(B) a phosphoric acid ester compound represented by general formula I;

##STR18## wherein Q₁, Q₂, Q₃ and Q₄ independently represent an alkyl group having 1 to 6 carbon atoms;

R₁, R₂, R₃ and R₄ independently represent a methyl group or a hydrogen atom;

n represents an integer of 1 or more;

n1 and n2 independently represent an integer of 0 to 2; and

m1, m2, m3 and m4 independently represent an integer of 1 to 3.

2. The resin composition according to claim 1, wherein an amount of the phosphoric acid ester compound of component (B) is in the range of from 1 to 200 parts by weight based on 100 parts by weight of the thermoplastic resin of component (A).

3. The resin composition according to claim 1 or 2, wherein n₁ and n₂ are 0 and R₃ and R₄ are methyl groups in the phosphoric acid ester of component (B).

4. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a polyphenylene ether.

5. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a polycarbonate resin.

6. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a polystyrene resin.

7. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a polyolefin resin.

8. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a polyamide resin.

9. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a resin composition comprising a polyphenylene ether resin and a polystyrene resin.

10. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a resin composition comprising a polyphenylene ether resin and a polyolefin resin.

11. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a resin composition comprising a polyphenylene ether resin and a polyamide resin.

12. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a resin composition comprising a polycarbonate resin and a polystyrene resin.

13. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a resin composition comprising a polyamide resin and a polystyrene resin.

14. The resin composition according to claim 1 or 2, wherein the thermoplastic resin of component (A) is a thermoplastic elastomer.

15. The resin composition according to claim 1 or 2, further comprising (C) at least one monophosphoric acid ester compound represented by general formula VI:

##STR19## wherein Q₅, Q₆, Q₇, Q₈, Q₉ and Q₁₀ independently represent a hydrogen atom or an alkyl group having 1 to 9 carbon atoms; and

n₃, n₄ and n₅ independently represent an integer of 0 to 3, and the total of n3, n4 and n5 is 3.

16. The resin composition according to claim 15, wherein one of the monophosphoric acid ester compounds of component (C) is triphenylphosphate.

17. The resin composition according to claim 15, wherein one of the monophosphoric acid ester compounds of component (C) is tricresylphosphate.

18. The resin composition according to claim 15, wherein one of the monophosphoric acid ester compounds of component (C) is cresyldiphenylphosphate.

19. The resin composition according to claim 1 or 2, wherein Q₁, Q₂, Q₃ and Q₄ are methyl groups in the phosphoric acid ester compound of component (B).

20. The resin composition according to claims 1 or 2, wherein the phosphoric acid ester compound of component (B) is a phosphoric acid ester compound represented by general formula V:

##STR20## wherein Q₁, Q₂, Q₃ and Q₄ independently represent an alkyl group having 1 to 6 carbon atoms;

Q₁ '"'"', Q₂ '"'"', Q₃ '"'"' and Q₄ '"'"' independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; and

n represents an integer of 1 or more.