US4792586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact strength of polyphenylene ether-linear polyester articles
Assignee: General Electric Co
•
Filing: 1986-11-21
•
Granted: 1988-12-20
•
Expires: 2006-11-21
Abstract
Abstract Molded articles are prepared from a blend of polyphenylene ether, linear polyester, elastomeric impact modifier and a polyisocyanate or masked polyisocyanate and are then annealed at a temperature above the glass transition temperature of the polyester, in order to increase the impact strength thereof. The preferred polyphenylene ethers are functionalized or unfunctionalized poly(2,6-dimethyl-1,4-phenylene ethers), and the preferred polyesters are poly(ethylene terephthalates) and poly(1,4-butylene terephthalates).
Inventors
- 👤 Choong Y. Han
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:23
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; C08L71/00; C08L71/08; C08L71/10; C08L71/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
137 words
A molded article of high impact strength prepared by the method which comprises the steps of: (A) preparing an intimate blend comprising about 20-60% by weight of at least one polyphenylene ether; about 25-65% of at least one linear polyester comprising at least 30 structural units of the formula ##STR7## wherein each of R 3 and R 4 is a divalent aliphatic, alicyclic or aromatic radical containing about 2-10 carbon atoms; about 1-10% of at least one polyisocyanate or masked polyisocyanate and about 2-20% of at least one elastomeric impact modifier; (B) molding said blend at a temperature within the range of about 250°-350° C. to produce said molded article; and (C) annealing said molded article at a temperature above the glass transition temperature of said polyester, for a time effective to increase the impact strength thereof.
Claim 2
Dependent Claim
137 words
A molded article of high impact strength prepared by the method which comprises the steps of: (A) preparing an intimate blend comprising about 20-60% by weight of at least one polyphenylene ether; about 25-65% of at least one linear polyester comprising at least 30 structural units of the formula ##STR7## wherein each of R 3 and R 4 is a divalent aliphatic, alicyclic or aromatic radical containing about 2-10 carbon atoms; about 1-10% of at least one polyisocyanate or masked polyisocyanate and about 2-20% of at least one elastomeric impact modifier; (B) molding said blend at a temperature within the range of about 250°-350° C. to produce said molded article; and (C) annealing said molded article at a temperature above the glass transition temperature of said polyester, for a time effective to increase the impact strength thereof.
Claim 3
Dependent Claim
80 words
An article according to claim 1 wherein the polyphenylene ether comprises a plurality of structural units having the formula ##STR8## and in each of said units independently, each Q 1 is independently halogen, primary or secondary lower alkyl, phenyl, haloalkyl, aminoalkyl, hydrocarbonoxy, or halohydrocarbonoxy wherein at least two carbon atoms separate the halogen and oxygen atoms; and each Q 2 is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy as defined for Q 1 .
Claim 4
Dependent Claim
37 words
An article according to claim 2 wherein the impact modifier is a block copolymer wherein at least one block is derived from styrene and at least one other block from at least one of butadiene and isoprene.
Claim 5
Dependent Claim
14 words
An article according to claim 3 wherein the diene blocks have been selectively hydrogenated.
Claim 6
Dependent Claim
37 words
An article according to claim 2 wherein the blend of step A contains about 25-50% by weight of polyphenylene ether, about 35-60% of polyester, about 3-10% of polyisocyanate or masked polyisocyanate and about 10-15% of impact modifier.
Claim 7
Dependent Claim
14 words
An article according to claim 5 wherein the polyphenylene ether is a poly(2,6-dimethyl-1,4-phenylene ether).
Claim 8
Dependent Claim
13 words
An article according to claim 4 wherein the polyester is a poly(ethylene terephthalate).
Claim 9
Dependent Claim
13 words
An article according to claim 4 wherein the polyester is a poly(1,4-butylene terephthalate).
Claim 10
Dependent Claim
11 words
An article according to claim 6 wherein the polyisocyanate is aliphatic.
Claim 11
Dependent Claim
11 words
An article according to claim 6 wherein the polyisocyanate is aromatic.
Claim 12
Dependent Claim
12 words
An article according to claim 6 wherein the polyisocyanate is tris(6-isocyanatohexyl) isocyanurate.
Claim 13
Dependent Claim
12 words
An article according to claim 6 wherein the polyisocyanate is 2,4-bis(4-isocyanatophenylmethyl)phenyl isocyanate.
Claim 14
Dependent Claim
25 words
An article according to claim 6 wherein the polyphenylene ether has been functionalized by reaction with maleic anhydride, fumaric acid or trimellitic anhydride acid chloride.
Claim 15
Dependent Claim
13 words
An article according to claim 13 wherein the polyester is a poly(ethylene terephthalate).
Claim 16
Dependent Claim
13 words
An article according to claim 13 wherein the polyester is a poly(1,4-butylene terephthalate).
References Cited (Backward Citations)
US4123410A
Cited
US4614773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |