US4444969A
Expired / Lapsed
US
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Fire retardant copolymer from bis(hydrocarbyl)vinyl phosphonate
Assignee: Lyondell Chemical Technology LP
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Filing: 1982-08-23
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Granted: 1984-04-24
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Expires: 2002-08-23
Abstract
Abstract Copolymers of a mono vinyl-substituted aryl hydrocarbon monomer, an imide derivative of an unsaturated cyclic anhydride and a bis(hydrocarbyl) vinylphosphonate are useful as fire retardant additives.
Inventors
- 👤 Usama E. Younes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:35
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F230/00; C08F230/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
150 words
A solid copolymer comprising recurring segments from: (1) a bis(hydrocarbyl) vinylphosphonate having the formula: ##STR7## wherein X is selected from the group consisting of hydrogen, halogen, cyano, aryl, C 1 -C 18 alkyl, alkenyl, cycloalkyl, cyclo alkenyl, and ##STR8## wherein R and R' hydrocarbyl and hydrocarbyl groups with substituents which do not interfere with the polymerization of the vinylphosphonate, the hydrocarbyl groups and substituted hydrocarbyl groups consisting essentially of hydrogen and carbon and containing up to about 18 carbon atoms inclusive with the proviso that R and R' may be the same, different or conjoint; (2) a monovinyl substituted aryl hydrocarbon monomer containing 8 to 20 carbon atoms; and, (3) an imide derivative of an unsaturated cyclic anhydride having the formula: ##STR9## wherein each R separately represents hydrogen, a C 1 to C 20 alkyl group, a phenyl or a substituted phenyl group, or a cycloalkyl or substituted cycloalkyl group.
Claim 2
Dependent Claim
150 words
A solid copolymer comprising recurring segments from: (1) a bis(hydrocarbyl) vinylphosphonate having the formula: ##STR7## wherein X is selected from the group consisting of hydrogen, halogen, cyano, aryl, C 1 -C 18 alkyl, alkenyl, cycloalkyl, cyclo alkenyl, and ##STR8## wherein R and R' hydrocarbyl and hydrocarbyl groups with substituents which do not interfere with the polymerization of the vinylphosphonate, the hydrocarbyl groups and substituted hydrocarbyl groups consisting essentially of hydrogen and carbon and containing up to about 18 carbon atoms inclusive with the proviso that R and R' may be the same, different or conjoint; (2) a monovinyl substituted aryl hydrocarbon monomer containing 8 to 20 carbon atoms; and, (3) an imide derivative of an unsaturated cyclic anhydride having the formula: ##STR9## wherein each R separately represents hydrogen, a C 1 to C 20 alkyl group, a phenyl or a substituted phenyl group, or a cycloalkyl or substituted cycloalkyl group.
Claim 3
Dependent Claim
35 words
The solid copolymer of claim 1 in which said monovinyl substituted aryl hydrocarbon monomer is present in an amount within the range of from about 30 to about 90 percent by weight of the copolymer.
Claim 4
Dependent Claim
16 words
The solid copolymer of claim 1 in which said monovinyl substituted aryl hydrocarbon monomer is styrene.
Claim 5
Dependent Claim
37 words
The solid copolymer of claim 1 in which said imide derivative of an unsaturated cyclic anhydride is present in an amount within the range of from about 3 to about 70 percent by weight of the copolymer.
Claim 6
Dependent Claim
18 words
The solid copolymer of claim 1 in which said imide derivative of an unsaturated cyclic anhydride is maleimide.
Claim 7
Dependent Claim
19 words
The solid copolymer of claim 1 in which said imide derivative of an unsaturated cyclic anhydride is N-phenyl maleimide.
Claim 8
Dependent Claim
33 words
The solid copolymer of claim 1 in which said bis (hydrocarbyl) vinylphosphonate is present in an amount within the range of from about 0.5 to about 25 percent by weight of the copolymer.
Claim 9
Dependent Claim
13 words
The solid copolymer of claim 1 in the form of a molded article.
Claim 10
Dependent Claim
15 words
A fire retardant additive for thermoplastics consisting essentially of the solid copolymer of claim 1.
Claim 11
Dependent Claim
74 words
An alternating solid copolymer represented by the general formula: ##STR10## wherein (X-Y) n ' represents a copolymer of a monovinyl substituted aryl hydrocarbon monomer and an imide derivative of an unsaturated cyclic anhydride; Z represents a vinyl phosphonate segment; each n separately represents an integer equal to or greater than 1, each n' separately represents an integer equal to or greater than 5; and, m represents an integer equal to or greater than 1.
Claim 12
Dependent Claim
74 words
An alternating solid copolymer represented by the general formula: ##STR10## wherein (X-Y) n ' represents a copolymer of a monovinyl substituted aryl hydrocarbon monomer and an imide derivative of an unsaturated cyclic anhydride; Z represents a vinyl phosphonate segment; each n separately represents an integer equal to or greater than 1, each n' separately represents an integer equal to or greater than 5; and, m represents an integer equal to or greater than 1.
References Cited (Backward Citations)
US4276344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |