US4089912A
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US
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Stabilized flame-retardant styrenic polymer compositions and the stabilizing flame-retardant mixtures used therein
Assignee: Great Lakes Chemical Corp
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Filing: 1976-07-28
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Granted: 1978-05-16
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Expires: 1996-07-28
Abstract
Abstract This application discloses stabilized flame-retardant styrenic polymer compositions comprising a bromine-containing flame-retardant, antimony trioxide and a three component stabilizer comprising a dialkyltin maleate, a hindered phenolic antioxidant, and a member selected from the group consisting of anhydrides of a cyclic dicarboxylic acid, ester derivatives thereof, imide derivatives thereof, and monomeric and dimeric polyesters.
Inventors
- 👤 Robert P. Levek
- 👤 David O. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:16
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/06; C09K21/08; C08; C08K; C08K13/00; C08K13/02; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/02; C08K5/04; C08K5/09; C08K5/10; C08K5/56; C08K5/57; C08L; C08L23/00; C08L23/02; C08L25/00; C08L33/00; C08L67/00; C08L67/06; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
109 words
A stabilized flame-retardant polymer composition comprising a normally combustible styrenic polymer, about 2-15 phr antimony trioxide, about 4-30 phr of a bromine-containing flame retardant agent, and about 0.5-3.0 phr of a stabilizing composition comprising: about 50-80% of a dialkyltin maleate of the formula ##STR6## where R is a C 1 -C 8 alkyl radical; about 5-15% of a hindered phenolic antioxidant; and about 5-45% of a member selected from the group consisting of an anhydride of a cyclic dicarboxylic acid, C 1 -C 8 alkyl ester derivatives thereof, imide derivatives thereof, polymeric esters of acrylic and methacrylic acids, poly(alkene-vinyl acetate) copolymers, and poly(diallylphthalate), by weight of the stabilizing composition.
Claim 2
Dependent Claim
109 words
A stabilized flame-retardant polymer composition comprising a normally combustible styrenic polymer, about 2-15 phr antimony trioxide, about 4-30 phr of a bromine-containing flame retardant agent, and about 0.5-3.0 phr of a stabilizing composition comprising: about 50-80% of a dialkyltin maleate of the formula ##STR6## where R is a C 1 -C 8 alkyl radical; about 5-15% of a hindered phenolic antioxidant; and about 5-45% of a member selected from the group consisting of an anhydride of a cyclic dicarboxylic acid, C 1 -C 8 alkyl ester derivatives thereof, imide derivatives thereof, polymeric esters of acrylic and methacrylic acids, poly(alkene-vinyl acetate) copolymers, and poly(diallylphthalate), by weight of the stabilizing composition.
Claim 3
Dependent Claim
24 words
A stabilized flame-retardant polymer composition, as claimed in claim 1, wherein the styrenic polymer is an acrylonitrile-butadiene-styrene copolymer and the flame-retardant agent is tetrabromobisphenol-A.
Claim 4
Dependent Claim
17 words
A stabilized flame-retardant polymer composition, as claimed in claim 1, wherein the said styrenic polymer is polystyrene.
Claim 5
Dependent Claim
17 words
A stabilized flame-retardant polymer composition, as claimed in claim 1, wherein said dialkyltin maleate is dibutyltin maleate.
Claim 6
Dependent Claim
16 words
A stabilized retardant polymer composition, as claimed in claim 1, wherein the antioxidant is 2,6-di-tert-butyl-4-methyl phenol.
Claim 7
Dependent Claim
16 words
A stabilized flame-retardant polymer composition, as claimed in claim 1, wherein the member is tetrahydrophthalic anhydride.
Claim 8
Dependent Claim
102 words
A stabilized flame-retardant additive composition comprising a bromine-containing flame-retardant agent and about 1-60 parts per hundred parts of the flame-retardant agent of a stabilizing composition comprising: about 50-80% of a dialkyltin maleate of the formula ##STR7## where R is a C 1 -C 8 alkyl radical; about 5-15% of a hindered phenolic antioxidant; and about 5-45% of a member selected from the group consisting of an anhydride of a cyclic carboxylic acid, C 1 -C 8 alkyl ester derivatives thereof, imide derivatives thereof; polymeric esters of acrylic and methacrylic acids, poly(alkene-vinyl acetate) copolymers, and poly(diallyl phthalate), by weight of the stabilizing composition.
Claim 9
Dependent Claim
102 words
A stabilized flame-retardant additive composition comprising a bromine-containing flame-retardant agent and about 1-60 parts per hundred parts of the flame-retardant agent of a stabilizing composition comprising: about 50-80% of a dialkyltin maleate of the formula ##STR7## where R is a C 1 -C 8 alkyl radical; about 5-15% of a hindered phenolic antioxidant; and about 5-45% of a member selected from the group consisting of an anhydride of a cyclic carboxylic acid, C 1 -C 8 alkyl ester derivatives thereof, imide derivatives thereof; polymeric esters of acrylic and methacrylic acids, poly(alkene-vinyl acetate) copolymers, and poly(diallyl phthalate), by weight of the stabilizing composition.
Claim 10
Dependent Claim
16 words
A stabilized flame-retardant additive composition, as claimed in claim 7, wherein the flame-retardant agent is tetrabromobisphenol-A.
Claim 11
Dependent Claim
30 words
A stabilized flame-retardant additive composition, as claimed in claim 7, wherein the flame-retardant agent is a member selected from the group consisting of decabromodiphenyl ether and mixtures thereof with tetrabromobisphenol-A.
Claim 12
Dependent Claim
28 words
A stabilized flame-retardant additive composition, as claimed in claim 7, wherein the flame-retardant agent is a member selected from the group consisting of octabromodiphenyl ether and 1,2-bis(2,4,6-tribromophenoxy) ethane.
Claim 13
Dependent Claim
17 words
A stabilized flame-retardant additive composition, as claimed in claim 7, wherein the dialkyltin maleate is dibutyltin maleate.
Claim 14
Dependent Claim
16 words
A stabilized flame-retardant additive composition, as claimed in claim 7, wherein the antioxidant is 2,6-di-tert-butyl-4-methyl phenol.
Claim 15
Dependent Claim
16 words
A stabilized flame-retardant additive composition, as claimed in claim 7, wherein the member is tetrahydrophthalic anhydride.
Claim 16
Dependent Claim
41 words
A stabilized flame-retardant additive composition comprising tetrabromobisphenol A and about 1-25 parts per hundred parts of tetrabromobisphenol-A of a stabilizing composition comprising about 50-80% dibutyltin maleate, about 5-10% 2,6-di-tert-butyl-4-methyl phenol; and about 5-45% tetrahydrophthalic anhydride, by weight of the stabilizing composition.
Claim 17
Dependent Claim
41 words
A stabilized flame-retardant additive composition comprising tetrabromobisphenol A and about 1-25 parts per hundred parts of tetrabromobisphenol-A of a stabilizing composition comprising about 50-80% dibutyltin maleate, about 5-10% 2,6-di-tert-butyl-4-methyl phenol; and about 5-45% tetrahydrophthalic anhydride, by weight of the stabilizing composition.
Claim 18
Dependent Claim
88 words
A stabilizing composition adapted for use with a bromine-containing flame retardant agents and comprising: about 50-80% of a dialkyltin maleate of the formula ##STR8## where R is a C 1 -C 8 alkyl radical; about 5-15% of a hindered-phenolic antioxidant; and about 5-45% of a member selected from the group consisting of an anhydride of a cyclic carboxylic acid, C 1 -C 8 alkyl ester deribatives thereof, imide derivatives thereof; polymer esters of acrylic and methacrylic acids, poly(alkene-vinyl acetate) copolymers, and poly(diallylphthlate), by weight of the stabilizing composition.
Claim 19
Dependent Claim
88 words
A stabilizing composition adapted for use with a bromine-containing flame retardant agents and comprising: about 50-80% of a dialkyltin maleate of the formula ##STR8## where R is a C 1 -C 8 alkyl radical; about 5-15% of a hindered-phenolic antioxidant; and about 5-45% of a member selected from the group consisting of an anhydride of a cyclic carboxylic acid, C 1 -C 8 alkyl ester deribatives thereof, imide derivatives thereof; polymer esters of acrylic and methacrylic acids, poly(alkene-vinyl acetate) copolymers, and poly(diallylphthlate), by weight of the stabilizing composition.
Claim 20
Dependent Claim
27 words
A stabilizing composition, as claimed in claim 15, wherein the dialkyltin maleate is dibutyltin maleate; the antioxidant is 2,6-di-tert-butyl-4-methyl phenol; and the said member is tetrahydrophthalic anhydride.
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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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |