US3931104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics stabilized against ultraviolet radiation
Assignee: Hoechst AG
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Filing: 1974-06-10
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Granted: 1976-01-06
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Expires: 1994-06-10
Abstract
Abstract Thermoplastic polymers are stabilized against ultra-violet radiation by incorporating therein as a stabilizer a stabilizing amount, e.g., 0.1 to 5% by weight of a tertiary phosphine oxide or sulfide of the general formula: ##EQU1## in which X is oxygen or sulfur and R 1 , R 2 and R 3 are each selected from hydroxyalkyl, haloalkyl, carbalkoxyalkyl, acyloxyalkyl, phenylhydroxyalkyl wherein the phenyl radical may be substituted by one or more halogens, and cyanoalkyl wherein the alkyl radical has 1 to 6 carbon atoms.
Inventors
- 👤 Walter Luders
- 👤 Edgar Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
132 words
A plastic material consisting essentially of a polymer selected from homopolymers and copolymers of ethylene, propylene, butene and 4-methyl-1-pentene and polystyrene and from 0.5 to 2% by weight of an ultra-violet radiation stabilizer which is a tertiary phosphine oxide or sulfide of the formula ##EQU3## in which X is oxygen or sulfur and either (a) R 1 and R 2 are β-cyano-ethyl and R 3 is a radical other than β-cyanoethyl selected from the group of radicals consisting of hydroxyalkyl, haloalkyl, hydroxy haloalkyl carbalkoxyalkyl, acyloxyalkyl, phenylhydroxyalkyl wherein the phenyl radical may be substituted by one or more halogens, and cyanoethyl wherein the alkyl radical has 1 to 6 carbon atoms or (b) R 1 , R 2 and R 3 are the same and each is selected from said group of radicals.
Claim 2
Dependent Claim
132 words
A plastic material consisting essentially of a polymer selected from homopolymers and copolymers of ethylene, propylene, butene and 4-methyl-1-pentene and polystyrene and from 0.5 to 2% by weight of an ultra-violet radiation stabilizer which is a tertiary phosphine oxide or sulfide of the formula ##EQU3## in which X is oxygen or sulfur and either (a) R 1 and R 2 are β-cyano-ethyl and R 3 is a radical other than β-cyanoethyl selected from the group of radicals consisting of hydroxyalkyl, haloalkyl, hydroxy haloalkyl carbalkoxyalkyl, acyloxyalkyl, phenylhydroxyalkyl wherein the phenyl radical may be substituted by one or more halogens, and cyanoethyl wherein the alkyl radical has 1 to 6 carbon atoms or (b) R 1 , R 2 and R 3 are the same and each is selected from said group of radicals.
Claim 3
Dependent Claim
12 words
A plastic material according to claim 1 wherein said polymer is polypropylene.
Claim 4
Dependent Claim
22 words
A plastic material according to claim 1 wherein at least one of R 1 , R 2 and R 3 is hydroxyhaloalkyl.
Claim 5
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is bis-(2-cyanoethyl)-hydroxymethyl-phosphine oxide.
Claim 6
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is bis-(2-cyanoethyl)-1-hydroxyethyl-phosphine oxide.
Claim 7
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is bis-(2-cyanoethyl)-2-chloro-1-hydroxyethyl-phosphine oxide.
Claim 8
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is bis-(2-cyanoethyl)-2,2,2-tri-chloro-1-hydroxyethyl-phosphine oxide.
Claim 9
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is bis-(2-cyanoethyl)-1,2-dicarboxymethylethyl-phosphine oxide.
Claim 10
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is tris-hydroxymethyl-phosphine oxide.
Claim 11
Dependent Claim
14 words
A plastic material according to claim 1 wherein said stabilizer is oxethylated tris-hydroxymethyl-phosphine oxide.
Claim 12
Dependent Claim
14 words
A plastic material according to claim 1 wherein said stabilizer is oxpropylated tris-hydroxymethyl-phosphine oxide.
Claim 13
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is tris-(2-cyanoethyl)-phosphine sulfide.
Claim 14
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is tris-stearolyoxymethyl-phosphine sulfide.
Claim 15
Dependent Claim
13 words
A plastic material according to claim 1 wherein said stabilizer is tris-(2-carbmethoxy)-ethyl-phosphine oxide.
Claim 16
Dependent Claim
87 words
A thermoplastic polymer containing a stabilizing amount of an ultra-violet radiation stabilizer which is a tertiary phosphine oxide or sulfide of the formula ##EQU4## in which X is oxygen or sulfur and R 1 , R 2 and R 3 are each selected from hydroxyalkyl, haloalkyl, hydroxy haloalkyl carbalkoxyalkyl, acyloxyalkyl, phenylhydroxyalkyl wherein the phenyl radical may be substituted by one or more halogens, and cyanoalkyl wherein the alkyl radical has 1 to 6 carbon atoms, provided that said stabilizer does not contain more than two cyanoalkyl groups.
Claim 17
Dependent Claim
87 words
A thermoplastic polymer containing a stabilizing amount of an ultra-violet radiation stabilizer which is a tertiary phosphine oxide or sulfide of the formula ##EQU4## in which X is oxygen or sulfur and R 1 , R 2 and R 3 are each selected from hydroxyalkyl, haloalkyl, hydroxy haloalkyl carbalkoxyalkyl, acyloxyalkyl, phenylhydroxyalkyl wherein the phenyl radical may be substituted by one or more halogens, and cyanoalkyl wherein the alkyl radical has 1 to 6 carbon atoms, provided that said stabilizer does not contain more than two cyanoalkyl groups.
Claim 18
Dependent Claim
17 words
A thermoplastic polymer according to claim 15 containing from 0.5 to 2% by weight of said stabilizer.
References Cited (Backward Citations)
US3269963A
Cited
US3341625A
Cited
US3594346A
Cited
US3532668A
Cited
US3676393A
Cited
US3629365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |