Patent US4385146A successfully refreshed from Google Patents.
US4385146A
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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 17:30
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)
US3306874A
Cited
US3306875A
Cited
US3257357A
Cited
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 |