US4743650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic molding blends of polycarbonates and polyurethanes
Assignee: General Electric Co
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Filing: 1986-10-31
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Granted: 1988-05-10
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Expires: 2006-10-31
Abstract
Abstract Thermoplastically moldable polycarbonate resins are improved by the blending therewith a thermoplastically moldable polyurethane characterized by high impact resistance, high flexural modulus, and a heat deflection temperature of at least 50 DEG C. at 18.6 Kg/cm2. Impact modifiers can also be present.
Inventors
- 👤 Omar M. Boutni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:11
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
A thermoplastic resin composition, which consists essentially of; a thermoplastic, aromatic polycarbonate; and a thermoplastic, polyurethane resin, characterized by high impact resistance, high flexural modulus, and a heat deflection temperature of at least 50° C. at 18.6 kg/cm 2 which comprises the product of reaction of (a) methylenebis (phyenyl isocyanate); (b) a polyether triol having an average functionality of at least 1.9, a glass transition temperature (Tg) of less than 20° C., and a molecular weight in the range of about 500 to about 20,000; and (c) at least one chain extender having a functionality from 2 to 3 and a molecular weight from about 50 to about 400; said polyurethane being further characterized in that the proportion by weight of said polyether triol (b) in said polyurethane is from about 2 to about 25 percent and the overall ratio of isocyanate groups to active hydrogen groups in said reactants employed to prepare said polyurethane is in the range of 0.95:1 to about 1.05:1; said polycarbonate and said polyurethane in admixture together in a weight ratio of from about 65:35 to about 95:5 (polycarbonate: polyurethane).
Claim 2
Dependent Claim
185 words
A thermoplastic resin composition, which consists essentially of; a thermoplastic, aromatic polycarbonate; and a thermoplastic, polyurethane resin, characterized by high impact resistance, high flexural modulus, and a heat deflection temperature of at least 50° C. at 18.6 kg/cm 2 which comprises the product of reaction of (a) methylenebis (phyenyl isocyanate); (b) a polyether triol having an average functionality of at least 1.9, a glass transition temperature (Tg) of less than 20° C., and a molecular weight in the range of about 500 to about 20,000; and (c) at least one chain extender having a functionality from 2 to 3 and a molecular weight from about 50 to about 400; said polyurethane being further characterized in that the proportion by weight of said polyether triol (b) in said polyurethane is from about 2 to about 25 percent and the overall ratio of isocyanate groups to active hydrogen groups in said reactants employed to prepare said polyurethane is in the range of 0.95:1 to about 1.05:1; said polycarbonate and said polyurethane in admixture together in a weight ratio of from about 65:35 to about 95:5 (polycarbonate: polyurethane).
Claim 3
Dependent Claim
32 words
A resin mixture as defined in claim 1 wherein the aromatic carbonate polymer comprises recurring structural units of the formula: ##STR3## wherein A is a divalent aromatic radical of a dihydric phenol.
Claim 4
Dependent Claim
23 words
The composition of claim 1 which further consists essentially of an impact modifying proportion of a compound which is an impact resistance modifier.
Claim 5
Dependent Claim
64 words
The composition of claim 3 wherein the modifier is a selectively hydrogenated linear, sequential, or radial teleblock copolymer resin of a vinyl aromatic compound (A) n and (A') n and an olefinic elastomer (B), of the A-B-A'; A-(B-A-B) n -A; A(-BA) n B; (A) 4 B; B(A) 4; or B((AB) n B) 4 type, wherein n is an integer of from 1 to 10.
Claim 6
Dependent Claim
44 words
The composition of claim 3 wherein the modifier is a copolymer of an olefin and at least one of a C 1 -C 6 alkyl acrylate, a C 1 -C 6 aklyl methacrylate, acrylic acid, methacrylic acid, or mixtures of any of the foregoing.
Claim 7
Dependent Claim
16 words
The composition of claim 5 wherein the modifier is a copolymer of ethylene and ethyl acrylate.
Claim 8
Dependent Claim
12 words
The composition of claim 3 wherein the modifier is a polyolefin resin.
Claim 9
Dependent Claim
14 words
The composition of claim 7 wherein the modifier is a linear low density polyethylene.
Claim 10
Dependent Claim
13 words
The composition of claim 3 wherein the modifier is an organopolysiloxane-polycarbonate block copolymer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |