US4491649A
Expired / Lapsed
US
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High impact polyphenylene ether compositions having improved processability
Assignee: GE Chemicals Inc
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Filing: 1983-12-01
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Granted: 1985-01-01
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Expires: 2003-12-01
Abstract
Abstract Polyphenylene ether resins impact modified with a rubbery impact modifier such as an ABA block copolymer or a polyolefin is made more processable by further compounding with a moderate amount of an aromatic polycarbonate. The compositions exhibit markedly high impact strength and high heat distortion temperature characteristics.
Inventors
- 👤 John C. Falk
- 👤 Ronald L. Jalbert
- 👤 Klementina F. Khait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:35
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L69/00; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A thermoplastic resin comprising: 100 parts by weight of a blend consisting of from 98 to 75 wt% of a polyphenylene ether and correspondingly from 2 to 25 wt% of a rubbery impact modifier; and from 5 to 50 parts by weight of an aromatic polycarbonate per hundred parts of said blend.
Claim 2
Dependent Claim
52 words
A thermoplastic resin comprising: 100 parts by weight of a blend consisting of from 98 to 75 wt% of a polyphenylene ether and correspondingly from 2 to 25 wt% of a rubbery impact modifier; and from 5 to 50 parts by weight of an aromatic polycarbonate per hundred parts of said blend.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherein said polyphenylene ether is selected from the group consisting of homopolymers of 2,6-dialkylphenols and copolymers of 2,6-dialkylphenols and 2,3,6-trialkylphenols.
Claim 4
Dependent Claim
27 words
The composition of claim 1 wherein the aromatic polycarbonate is selected from the group consisting of carbonate polymers of 2,2-bis(4-hydroxyphenyl)propane, carbonate polymers of 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane and copolymers thereof.
Claim 5
Dependent Claim
28 words
The composition of claim 1 wherein the rubbery impact modifier is selected from the group consisting of styrene-butadiene-styrene block copolymers, hydrogenated styrene-butadiene-styrene block copolymers, polyolefins, and mixtures thereof.
Claim 6
Dependent Claim
103 words
A thermoplastic resin composition comprising: (a) 100 parts by weight of a blend consisting of from 98 to 75 wt% of a polyphenylene ether selected from the group consisting of homopolymers of 2,6-dialkylphenols and copolymers of 2,6-dialkylphenols and 2,3,6-trialkylphenols and from 2 to 25 wt% of a rubbery impact modifier selected from the group consisting of styrene-butadiene-styrene block copolymers, hydrogenated styrene-butadiene-styrene block copolymers, polyolefins and mixtures thereof; and (b) from 5 to 25 parts by weight of an aromatic polycarbonate selected from the group consisting of carbonate polymers of 2,2-bis(4-hydroxyphenyl)propane, carbonate polymers of 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane and copolymers thereof per hundred parts of said blend.
Claim 7
Dependent Claim
103 words
A thermoplastic resin composition comprising: (a) 100 parts by weight of a blend consisting of from 98 to 75 wt% of a polyphenylene ether selected from the group consisting of homopolymers of 2,6-dialkylphenols and copolymers of 2,6-dialkylphenols and 2,3,6-trialkylphenols and from 2 to 25 wt% of a rubbery impact modifier selected from the group consisting of styrene-butadiene-styrene block copolymers, hydrogenated styrene-butadiene-styrene block copolymers, polyolefins and mixtures thereof; and (b) from 5 to 25 parts by weight of an aromatic polycarbonate selected from the group consisting of carbonate polymers of 2,2-bis(4-hydroxyphenyl)propane, carbonate polymers of 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane and copolymers thereof per hundred parts of said blend.
Claim 8
Dependent Claim
16 words
The composition of claim 5 wherein said rubbery impact modifier is a hydrogenated styrene-butadienestyrene block copolymer.
Claim 9
Independent Claim
66 words
A method for improving the melt processability of a thermoplastic resin comprising 100 parts by weight of a blend consisting of from 98 to 75 wt% of a polyphenylene ether and correspondingly from 2 to 25 wt% of a rubbery impact modifier, said method comprising the step of including from 5 to 20 parts by weight, per hundred parts of said blend, of an aromatic polycarbonate.
Claim 10
Independent Claim
66 words
A method for improving the melt processability of a thermoplastic resin comprising 100 parts by weight of a blend consisting of from 98 to 75 wt% of a polyphenylene ether and correspondingly from 2 to 25 wt% of a rubbery impact modifier, said method comprising the step of including from 5 to 20 parts by weight, per hundred parts of said blend, of an aromatic polycarbonate.
Claim 11
Dependent Claim
41 words
A method according to claim 7 comprising the steps of: first combining the polyphenylene ether resin with the aromatic polycarbonate resin under melt-processing conditions to form a preblend, and thereafter combining said preblend under melt-processing conditions with the rubbery impact modifier.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |