CA1049682A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Carboxyfunctional silicone containing thermoplastics
Assignee: Dow Silicones Corp
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Filing: 1975-01-22
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Granted: 1979-02-27
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Expires: 1995-01-22
Abstract
Abstract ABSTRACT OF THE DISCLOSURE Carboxyfunctional silicone containing thermo-plastics are disclosed which have enhanced properties, such as lubricity, internal release and wear resistance, as compared to the thermoplastics per se. These improved thermoplastics are useful inter alia in bearings, tape cartridges and cassettes, phonograph records, toys and containers.
Inventors
- 👤 Albert W. Duncan
- 👤 Howard F. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-01 01:06
CPC Classifications
C; C08; C08L; C08L101/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
A composition consisting essentially of (A) from 90 to 99.9 percent by weight of a polymeric thermo-plastic material and (B) from 0.1 to 10 percent by weight of a carboxyfunctional siloxane composed of from 0.1 to 50 mole percent of units and from 50 to 99.9 mole percent of units wherein R is a carboxyfunctional radical which contains a -COOH group and is attached to the silicon atom via a silicon-carbon bond, a has an average value from 1 to 3, R' is a hydrocarbon or halogenated hydrocarbon radical, b has an average value from 0 to 2, the sum of a + b is from 1 to 3, R" is a hydrocarbon or halogenated hydrocarbon radical, and c has an average value from 0 to 3.
Claim 2
Dependent Claim
127 words
A composition consisting essentially of (A) from 90 to 99.9 percent by weight of a polymeric thermo-plastic material and (B) from 0.1 to 10 percent by weight of a carboxyfunctional siloxane composed of from 0.1 to 50 mole percent of units and from 50 to 99.9 mole percent of units wherein R is a carboxyfunctional radical which contains a -COOH group and is attached to the silicon atom via a silicon-carbon bond, a has an average value from 1 to 3, R' is a hydrocarbon or halogenated hydrocarbon radical, b has an average value from 0 to 2, the sum of a + b is from 1 to 3, R" is a hydrocarbon or halogenated hydrocarbon radical, and c has an average value from 0 to 3.
Claim 3
Dependent Claim
106 words
A composition as defined in claim 1 wherein (A) is from 95 to 99.75 percent 9 (B) is from 0.25 to 5 percent and is composed of 0.25 to 10 mole percent units and 95 to 99.75 mole percent units, R is a radical of the structure HOOC-Q-wherein Q is a divalent linking group attached to the silicon atom via a silicon to carbon bond, I has an average value of 1, R' is a hydrocarbon radical containing from 1 to 18 carbon atoms, b has an average value of 0 to 1, and R" is a hydrocarbon radical containing from 1 to 18 carbon atoms.
Claim 4
Dependent Claim
48 words
A composition as defined in claim 2 wherein in the siloxane Q is an alkylene radical containing from 2 to 10 carbon atoms, R' is a methyl radical, b has an average value of 1, R" is a methyl radical, and c has an average value of 2.
Claim 5
Dependent Claim
65 words
A composition as defined in claim 2 wherein in the siloxane Q is composed of carbon, hydrogen and sulfur atoms, the sulfur atoms being present in the form of thioether linkages, said Q containing from 2 to 10 carbon atoms, R' is a methyl radical, b has an average value of 1, R" is a methyl radical, and c has an average value of 2.
Claim 6
Dependent Claim
30 words
A composition as defined in claim 1 wherein the thermoplastic material is selected from the group consisting of polystyrene, polyvinyl chloride, nylon, polytetrafluoroethylene, polypropylene, poly-carbonate, acrylonitrile-butadiene-styrene terpolymers, and styrene-acrylonitrile copolymers.
References Cited (Backward Citations)
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