Patent US4717751A successfully refreshed from Google Patents.
US4717751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyester resin blends with high impact resistance
Assignee: General Electric Co
•
Filing: 1986-06-19
•
Granted: 1988-01-05
•
Expires: 2006-06-19
Abstract
Abstract Resinous compositions comprising blends of linear polyesters such as poly(butylene terephthalate) with nitrile rubbers have very high impact strengths. The blends may also contain other polymers such as elastomers free from nitrile structural units, addition polymers of olefins or chlorinated olefins, or polylactones; such other polymers frequently improve properties such as gloss and low temperature impact strength.
Inventors
- 👤 John B. Yates, III
- 👤 Timothy J. Ullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:38
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A resinous composition having a notched Izod impact strength at room temperature in excess of 635 joules/m., wherein the resinous components consist essentially of: (A) at least one polyester selected from the group consisting of poly(ethylene terephthalate) and poly(butylene terephthalate), and (B) a blend of: (B-1) at least one elastomeric addition copolymer consisting essentially of structural units derived from acrylonitrile and at least one conjugated diene or a combination of at least one conjugated diene and at least one acidic monomer, and (B-2) at least one elastomeric copolymer consisting essentially of ethylene, propylene and non-conjugated diene units; said blend containing nitrile structural units in an amount to provide from 1% to about 8% by weight of said units in said resinous composition.
Claim 2
Dependent Claim
122 words
A resinous composition having a notched Izod impact strength at room temperature in excess of 635 joules/m., wherein the resinous components consist essentially of: (A) at least one polyester selected from the group consisting of poly(ethylene terephthalate) and poly(butylene terephthalate), and (B) a blend of: (B-1) at least one elastomeric addition copolymer consisting essentially of structural units derived from acrylonitrile and at least one conjugated diene or a combination of at least one conjugated diene and at least one acidic monomer, and (B-2) at least one elastomeric copolymer consisting essentially of ethylene, propylene and non-conjugated diene units; said blend containing nitrile structural units in an amount to provide from 1% to about 8% by weight of said units in said resinous composition.
Claim 3
Dependent Claim
12 words
A composition according to claim 1 wherein the conjugated diene is butadiene.
Claim 4
Dependent Claim
39 words
A composition according to claim 2 wherein component B-1 is a copolymer of acrylonitrile with at least one conjugated diene and component A is a poly(butylene terephthalate) having a number average molecular weight in the range of about 20,000-60,000.
Claim 5
Dependent Claim
31 words
A composition according to claim 3 wherein component B-1 contains about 20-50% nitrile structural units by weight and has a Mooney viscosity in the range of about 25-150 at 100° C.
Claim 6
Dependent Claim
18 words
A composition according to claim 4 wherein component B-1 also contains about 2-10% of acrylic acid structural units.
References Cited (Backward Citations)
US4172859A
Cited
US4117034A
Cited
US4119607A
Cited
US4260690A
Cited
US4292233A
Cited
US4342846A
Cited
US4373067A
Cited
US4485212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |