US4385146A
Expired / Lapsed
US
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Modified polyphenylene ether compositions having enhanced melt flow
Assignee: General Electric Co
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Filing: 1981-10-20
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Granted: 1983-05-24
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Expires: 2001-10-20
Abstract
Abstract Thermoplastic molding compositions of a polyphenylene ether resin and optionally an impact modifier are improved by addition of a minor amount of tribenzylphosphine oxide which depresses the viscosity and enhances the melt flow of the resin.
Inventors
- 👤 Robert J. Axelrod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
47 words
A thermoplastic molding composition comprising a structural thermoplastic polyphenylene ether resin, a styrenic resin and a small but effective amount of a flow promoter consisting essentially of tribenzylphosphine oxide, said polyphenylene ether resin being present in an amount greater than 10 percent by weight of the composition.
Claim 2
Dependent Claim
47 words
A thermoplastic molding composition comprising a structural thermoplastic polyphenylene ether resin, a styrenic resin and a small but effective amount of a flow promoter consisting essentially of tribenzylphosphine oxide, said polyphenylene ether resin being present in an amount greater than 10 percent by weight of the composition.
Claim 3
Dependent Claim
16 words
A composition according to claim 1 where the polyphenylene ether resin is a poly-(2,6-dimethyl-1,4-phenylene) ether resin.
Claim 4
Dependent Claim
27 words
A composition according to claim 1 in which the styrenic resin is rubber modified and is present in an amount from 10% to 90% of the composition.
Claim 5
Dependent Claim
15 words
A composition according to claim 3 wherein the resin is a polybutadiene modified polystyrene resin.
Claim 6
Dependent Claim
26 words
A composition according to claim 1 wherein the weight of said flow promoter is between 0.1% and 15% of the total weight of thermoplastic components therein.
Claim 7
Independent Claim
75 words
A method for the preparation of a composition comprising a structural thermoplastic polyphenylene ether resin and a styrenic resin, said composition having decreased melt viscosity, which comprises forming a melt containing at least 10% by weight of the polyphenylene ether resin and between 0.1% and 15%, based on the weight of the polyphenylene ether resin and styrenic resin combined, of tribenzylphosphine oxide, cooling the melt until solid, and comminuting the solid into a particulate state.
Claim 8
Independent Claim
75 words
A method for the preparation of a composition comprising a structural thermoplastic polyphenylene ether resin and a styrenic resin, said composition having decreased melt viscosity, which comprises forming a melt containing at least 10% by weight of the polyphenylene ether resin and between 0.1% and 15%, based on the weight of the polyphenylene ether resin and styrenic resin combined, of tribenzylphosphine oxide, cooling the melt until solid, and comminuting the solid into a particulate state.
Claim 9
Dependent Claim
11 words
A composition according to claim 1, which includes a mineral filler.
Claim 10
Dependent Claim
11 words
A composition according to claim 1, which includes a fire retardant.
Claim 11
Dependent Claim
12 words
A composition according to claim 1, which includes a fibrous strengthening agent.
Claim 12
Dependent Claim
20 words
A composition according to claim 1, which includes a coloring agent selected from the group consisting of dyes and pigments.
References Cited (Backward Citations)
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US3257357A
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US3257358A
Cited
US4129551A
Cited
US4191685A
Cited
US4172929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |