Stress-crack-resistant, halogen-free, flame-protected polyester

Patent metadata

Field	Value
Publication number	US-10344144-B2
Application number	US-201414786177-A
Country	US
Kind code	B2
Filing date	Apr 15, 2014
Priority date	Apr 25, 2013
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

1. The invention relates to the use of polyester molding compositions composed of
A) from 20 to 97.9% by weight of a thermoplastic polyester B) from 0.1 to 10% by weight of an epoxidized natural oil or fatty acid ester, or mixture of these, where the epoxide equivalent weight of component B) in accordance with DIN EN ISO 3001 is from 100 to 400 g/eq C) from 1 to 20% by weight of a metal salt of a phosphinic acid D) from 1 to 20% by weight of a melamine compound E) from 0 to 60% by weight of other additional substances, where the total of the percentages by weight of components A) to E) is 100%, for the production of stress-cracking-resistant and halogen-free flame-retardant polyester molding compositions.

First claim

The invention claimed is:

1. A method of producing a stress-cracking-resistant and halogen-free flame-retardant polyester molding comprising the use of polyester molding compositions consisting of
A) from 35 to 88% by weight of a thermoplastic polyester
B) from 0.1 to 10% by weight of an epoxidized natural oil or fatty acid ester, or mixture of these, where the epoxide equivalent weight of component B) in accordance with DIN EN ISO 3001 is from 100 to 400 g/eq
C) from 1 to 20% by weight of at least one metal salt of a phosphinic acid of the formula

where
R 1 =hydrogen, phenyl, methyl, ethyl, propyl, butyl, pentyl, octyl, phenyl, or

R′=hydrogen, phenyl, tolyl,
M=Mg, Ca, Al, Zn, and
m=from 1 to 4
D) from 1 to 20% by weight of melamine cyanurate
E) from 0 to 60% by weight of other additional substances selected from the group consisting of carbon fibers, glass fibers, glass beads, amorphous silica, asbestos, calcium silicate, calcium metasilicate, magnesium carbonate, kaolin, chalk, powdered quartz, mica, varium sulfate, and feldspar,
where the total of the percentages by weight of components A) to E) is 100.

2. The method according to claim 1 , where the content of epoxy groups in component B) is from 1 to 20% by weight.

3. The method according to claim 1 , where the epoxy groups in component B) are not terminal.

4. The method according to claim 1 , where component B) comprises epoxidized olive oil, linseed oil, soybean oil, palm oil, groundnut oil, coconut oil, tung oil, cod liver oil, or a mixture of these.

5. The method according to claim 1 , where the epoxidized fatty acid ester B) comprises saturated or unsaturated aliphatic carboxylic acids having from 10 to 40 carbon atoms with saturated aliphatic alcohols having from 2 to 40 carbon atoms.

6. The method according to claim 1 wherein the thermoplastic polyester A) is a polyalkylene terephthate having an alcohol moiety with from 2 to 10 carbons and an aromatic dicarboxylic acid moiety wherein the aromatic ring is optionally substituted with a halogen or a C 1 -C 4 -alkyl group.

7. The method according to claim 1 wherein R 1 of component C) is hydrogen, methyl, or ethyl, and M=Al.

8. A method of producing a stress-cracking-resistant and halogen-free flame-retardant polyester molding comprising the use of polyester molding compositions consisting of
A) from 35 to 88% by weight of a thermoplastic polyester
B) from 0.1 to 10% by weight of an epoxidized natural oil or fatty acid ester, or mixture of these, where the epoxide equivalent weight of component B) in accordance with DIN EN ISO 3001 is from 100 to 400 g/eq
C) from 1 to 20% by weight of at least one metal salt of a phosphinic acid of the formula

where
R 1 =hydrogen, phenyl, methyl, ethyl, propyl, butyl, pentyl, octyl, phenyl, or

R′=hydrogen, phenyl, tolyl,
M=Mg, Ca, Al, Zn, and
m=from 1 to 4
D) from 1 to 20% by weight of melamine cyanurate
E) from 0 to 60% by weight of other additional substances selected from the group consisting of carbon fibers, glass fibers, glass beads, amorphous silica, asbestos, calcium silicate, calcium metasilicate, magnesium carbonate, kaolin, chalk, powdered quartz, mica, varium sulfate, feldspar, ethylene copolymers, ethylene-propylene copolymers, polyester elastomers, thermoplastic polyurethanes, esters or amides of saturated or unsaturated aliphatic carboxylic acids having from 10 to 40 carbon atoms with saturated aliphatic carboxylic acids having from 10 to 40 carbon atoms with saturated aliphatic alcohols or amines having from 2 to 40 carbon atoms, stabilizers, oxidation retarders, agents to counteract decomposition by heat and decomposition by ultraviolet light, lubricants, mold-release agents, colorants, nucleating agents, plasticizers, and fluorine-containing ethylene polymers,
where the total of the percentages by weight of components A) to E) is 100.

9. The method according to claim 8 , where the content of epoxy groups in component B) is from 1 to 20% by weight.

10. The method according to claim 9 , where the epoxy groups in component B) are not terminal.

11. The method according to claim 8 , where the epoxy groups in component B) are not terminal.

12. The method according to claim 8 , where component B) comprises epoxidized olive oil, linseed oil, soybean oil, palm oil, groundnut oil, coconut oil, tung oil, cod liver oil, or a mixture of these.

13. The method according to claim 8 , where the epoxidized fatty acid ester B) comprises saturated or unsaturated aliphatic carboxylic acids having from 10 to 40 carbon atoms with saturated aliphatic alcohols having from 2 to 40 carbon atoms.

14. A stress-cracking-resistant flame-retardant molding, fiber, or foil obtained according to claim 8 .

15. An injection molding, coated molding, molding for electrical and electronic uses, or motor-vehicle component, obtained according to claim 8 .

16. The method according to claim 8 wherein the thermoplastic polyester A) is a polyalkylene terephthate having an alcohol moiety with from 2 to 10 carbons and an aromatic dicarboxylic acid moiety wherein the aromatic ring is optionally substituted with a halogen or a C 1 -C 4 -alkyl group.

17. The method according to claim 8 wherein the thermoplastic polyester A) is selected from the group consisting of polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, and mixtures thereof.

18. The method according to claim 8 wherein the thermoplastic polyester A) is a polyethylene terephalate, a polybutylene terephthalate, or a mixture thereof further comprising 1,6-hexanediol, 2-methyl-1,5-pentanediol or a mixture thereof as an additional monomer in an amount of up to 1% by weight of the polyester A).

19. The method according to claim 8 wherein R 1 of component C) is hydrogen, methyl, or ethyl.

20. The method according to claim 19 wherein M=Al.

Assignees

• Basf Se

Inventors

• Roth Michael
• Uske Klaus
• Wagner Sebastian
• Wolf Ulli

Classifications

• C08K5/1515

  Three-membered rings · CPC title

• C08K5/34922

  Melamine; Derivatives thereof · CPC title

• C08K5/5313 Primary

  Phosphinic compounds, e.g. R2=P(:O)OR' · CPC title

• C08L67/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title