US4405739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphenylene ether resins and compositions heat stabilized with phosphite compounds
Assignee: General Electric Co
•
Filing: 1981-11-17
•
Granted: 1983-09-20
•
Expires: 2001-11-17
Abstract
Abstract Polyphenylene ether resins and compositions of such resins in admixture with certain specific phosphite thermal oxidative stabilizers are described. These blends can be used with or without impact modifiers. As an additional benefit, the resins and compositions possess good melt flow properties which facilitates processing during molding.
Inventors
- 👤 Philip L. Kinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/527
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A thermoplastic composition which comprises an intimate admixture of a polyphenylene ether resin with an effective amount of a thermal oxidative stabilizing agent selected from among compounds having the formula: ##STR3## in which x is 0 or an integer of from 1 to 5 representing the number of substituents on the phenyl ring; R is independently hydrogen, alkyl having 1 to 10 carbon atoms, halogen or hydroxyl; and R' is independently hydrogen, or (lower) alkyl having from 1 to 6 carbon atoms.
Claim 2
Dependent Claim
82 words
A thermoplastic composition which comprises an intimate admixture of a polyphenylene ether resin with an effective amount of a thermal oxidative stabilizing agent selected from among compounds having the formula: ##STR3## in which x is 0 or an integer of from 1 to 5 representing the number of substituents on the phenyl ring; R is independently hydrogen, alkyl having 1 to 10 carbon atoms, halogen or hydroxyl; and R' is independently hydrogen, or (lower) alkyl having from 1 to 6 carbon atoms.
Claim 3
Dependent Claim
33 words
A composition according to claim 1, in which the stabilizing compound is present in an amount of from about 0.1 to about 10 parts by weight based on the total amount of resin.
Claim 4
Dependent Claim
13 words
A composition according to claim 1 which also includes an alkenyl aromatic resin.
Claim 5
Dependent Claim
16 words
A composition according to claim 3, in which the alkenyl aromatic resin is a styrene resin.
Claim 6
Dependent Claim
26 words
A composition according to claim 4, in which the ratio of polyphenylene ether and styrene resin is from 20:1 and 1:2, respectively, on a weight basis.
Claim 7
Dependent Claim
14 words
A composition according to claim 4, in which the polyphenylene ether is poly(2,6-dimethyl-1,4-phenylene ether).
Claim 8
Dependent Claim
18 words
A composition according to claim 4, in which the styrene resin is a rubber modified high impact polystyrene.
Claim 9
Dependent Claim
24 words
A composition according to claim 1, which also contains one or more additives selected from among flame retardants, plasticizers, fillers, reinforcements, and coloring agents.
Claim 10
Dependent Claim
16 words
A composition according to claim 1, in which the stabilizing agent is phenyl neopentylene glycol phosphite.
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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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |