US4357433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polyphenylene ether resin compositions
Assignee: FMC Corp
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Filing: 1981-06-12
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Granted: 1982-11-02
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Expires: 2001-06-12
Abstract
Abstract A polyphenylene ether resin composition comprising: (i) from about 30 to about 90 weight percent of a graft copolymer free from polyphenylene ether homopolymers prepared by polymerizing 20 to 200 parts by weight of styrene-type compound at a temperature in the range from 130° C. to 200° C. in the presence of 100 parts by weight of polyphenylene ether and 0.1 to 15 parts by weight of a radical initiator and (ii) 10 to 70 weight percent of a styrene-type compound polymer having a number average molecular weight in the range from 50,000 to 200,000; is rendered fire retardant by the addition of an effective amount of a phosphine oxide having the formula ##STR1## wherein R 1 may be the same or different radicals selected from the group consisting of hydrogen and the methyl radical, R 2 is an alkyl radical of 4 to 8 carbon atoms and n is either zero or one.
Inventors
- 👤 Diza P. Braksmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
171 words
A flame retardant polyphenylene ether resin composition comprising: (a) from about 3 parts to about 10 parts by weight of a phosphine oxide having the formula: ##STR4## wherein R 1 may be the same or different radicals selected from the group consisting of hydrogen and the methyl radical, R 2 is an alkyl radical of 4 to 8 carbon atoms and n is either zero or one; and (b) 100 parts by weight of a polyphenylene oxide graft copolymer composition comprising (i) from about 30 to about 90 weight percent of a graft copolymer free from polyphenylene ether homopolymers prepared by polymerizing 20 to 200 parts by weight of styrene-type compound at a temperature in the range from 130° C. to 200° C. in the presence of 100 parts by weight of a polyphenylene ether and 0.1 to 15 parts by weight of a radical initiator, and (ii) 10 to 70 weight percent of a styrene-type compound polymer having a number average molecular weight in the range from 50,000 to 200,000.
Claim 2
Dependent Claim
171 words
A flame retardant polyphenylene ether resin composition comprising: (a) from about 3 parts to about 10 parts by weight of a phosphine oxide having the formula: ##STR4## wherein R 1 may be the same or different radicals selected from the group consisting of hydrogen and the methyl radical, R 2 is an alkyl radical of 4 to 8 carbon atoms and n is either zero or one; and (b) 100 parts by weight of a polyphenylene oxide graft copolymer composition comprising (i) from about 30 to about 90 weight percent of a graft copolymer free from polyphenylene ether homopolymers prepared by polymerizing 20 to 200 parts by weight of styrene-type compound at a temperature in the range from 130° C. to 200° C. in the presence of 100 parts by weight of a polyphenylene ether and 0.1 to 15 parts by weight of a radical initiator, and (ii) 10 to 70 weight percent of a styrene-type compound polymer having a number average molecular weight in the range from 50,000 to 200,000.
Claim 3
Dependent Claim
35 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said polyphenylene ether, prior to polymerization with said styrene-type compound, has a number average polymerization degree in the range of from 50 to 300.
Claim 4
Dependent Claim
34 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said polyphenylene ether, prior to polymerization with said styrene-type compound, has a number average polymerization degree in the range of 60 to 280.
Claim 5
Dependent Claim
35 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said polyphenylene ether, prior to polymerization with said styrene-type compound, has a number average polymerization degree in the range of from 70 to 250.
Claim 6
Dependent Claim
17 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said phosphine oxide is tris(3-hydroxypropyl)phosphine oxide.
Claim 7
Dependent Claim
18 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said phosphine oxide is s-butyl bis(3-hydroxypropyl)phosphine oxide.
Claim 8
Dependent Claim
17 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said phosphine oxide is tris(2-methyl-3-hydroxypropyl)phosphine oxide.
Claim 9
Dependent Claim
18 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said phosphine oxide is n-butyl bis(3-hydroxypropyl)phosphine oxide.
Claim 10
Dependent Claim
18 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said phosphine oxide is 2-methyl-3-hydroxypropyl bis(3-hydroxypropyl)phosphine oxide.
Claim 11
Dependent Claim
20 words
The flame retardant polyphenylene ether resin composition of claim 1 wherein said styrene-type compound polymer (ii) is high impact polystyrene.
Claim 12
Independent Claim
162 words
A method of manufacturing a flame resistant polyphenylene oxide graft copolymer composition containing (i) from about 30 to about 90 weight percent of a graft copolymer free from polyphenylene ether homopolymers prepared by polymerizing 20 to 200 parts by weight of styrene-type compound at a temperature in the range from 130° C. to 200° C. in the presence of 100 parts by weight of polyphenylene ether and 0.1 to 15 parts by weight of a radical initiator and (ii) 10 to 70 weight percent of a styrene-type compound polymer having a number average molecular weight in the range of 50,000 to 200,000; which comprises adding to said polyphenylene oxide graft copolymer composition an effective amount of a phosphine oxide having the formula ##STR5## wherein R 1 may be the same or different radicals selected from the group consisting of hydrogen and the methyl radical, R 2 is an alkyl radical of 4 to 8 atoms and n is either zero or one.
Claim 13
Independent Claim
162 words
A method of manufacturing a flame resistant polyphenylene oxide graft copolymer composition containing (i) from about 30 to about 90 weight percent of a graft copolymer free from polyphenylene ether homopolymers prepared by polymerizing 20 to 200 parts by weight of styrene-type compound at a temperature in the range from 130° C. to 200° C. in the presence of 100 parts by weight of polyphenylene ether and 0.1 to 15 parts by weight of a radical initiator and (ii) 10 to 70 weight percent of a styrene-type compound polymer having a number average molecular weight in the range of 50,000 to 200,000; which comprises adding to said polyphenylene oxide graft copolymer composition an effective amount of a phosphine oxide having the formula ##STR5## wherein R 1 may be the same or different radicals selected from the group consisting of hydrogen and the methyl radical, R 2 is an alkyl radical of 4 to 8 atoms and n is either zero or one.
Claim 14
Dependent Claim
23 words
The method of claim 11 wherein the amount of said phosphine oxide added is from about 4 to about 8 parts per hundred.
Claim 15
Dependent Claim
29 words
The method of claim 11 wherein said polyphenylene ether prior to polymerization with said styrene-type compound has a number average polymerization degree in the range of 50 to 300.
Claim 16
Dependent Claim
30 words
The method of claim 11 wherein said polyphenylene ether prior to polymerization with said styrene-type compound has a molecular average polymerization degree in the range of from 60 to 80.
Claim 17
Dependent Claim
29 words
The method of claim 11 wherein said polyphenylene ether prior to polymerization with said styrene-type compound has a number average polymerization degree in the range of 70 to 250.
Claim 18
Dependent Claim
12 words
The method of claim 11 wherein said phosphine oxide is tris(3-hydroxypropyl)phosphine oxide.
Claim 19
Dependent Claim
13 words
The method of claim 11 wherein said phosphine oxide is s-butyl bis(3-hydroxypropyl)phosphine oxide.
Claim 20
Dependent Claim
12 words
The method of claim 11 wherein said phosphine oxide is tris(2-methyl-3-hydroxypropyl)phosphine oxide.
Claim 21
Dependent Claim
13 words
The method of claim 11 wherein said phosphine oxide is n-butyl bis(3-hydroxypropyl)phosphine oxide.
Claim 22
Dependent Claim
13 words
The method of claim 11 wherein said phosphine oxide is 2-methyl-3-hydroxypropyl bis(3-hydroxypropyl)phosphine oxide.
Claim 23
Dependent Claim
14 words
The method of claim 11 wherein said styrene-type compound (ii) is high impact polystyrene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |