US4397982A
Expired / Lapsed
US
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Compositions
Assignee: General Electric Co
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Filing: 1981-10-30
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Granted: 1983-08-09
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Expires: 2001-10-30
Abstract
Abstract Novel thermoplastic molding compositions of a polycarbonate, a linear low density polyolefin, a multiphase composite interpolymer of an acrylate and a methacrylate are disclosed which have good impact strengths and reprocessability.
Inventors
- 👤 Omar M. Boutni
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:21
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
104 words
A thermoplastic molding composition which comprises: (a) a high molecular weight polycarbonate resin; (b) a multiphase composite interpolymer which comprises: (i) a first elastomeric phase polymerized from a C 1-5 alkyl acrylate; a crosslinking monomer; and a graft-linking monomer, said graft-linking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups, at least one of which polymerizes at a substantially different rate of polymerization from at least one other of said reactive groups; and (ii) a final rigid thermoplastic phase polymerized at the surface of the elastomeric phase comprising a C 1-5 methacrylate; and (c) a linear low density polyolefin.
Claim 2
Dependent Claim
104 words
A thermoplastic molding composition which comprises: (a) a high molecular weight polycarbonate resin; (b) a multiphase composite interpolymer which comprises: (i) a first elastomeric phase polymerized from a C 1-5 alkyl acrylate; a crosslinking monomer; and a graft-linking monomer, said graft-linking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups, at least one of which polymerizes at a substantially different rate of polymerization from at least one other of said reactive groups; and (ii) a final rigid thermoplastic phase polymerized at the surface of the elastomeric phase comprising a C 1-5 methacrylate; and (c) a linear low density polyolefin.
Claim 3
Dependent Claim
17 words
A thermoplastic molding composition as defined in claim 1 wherein the linear low density polyolefin is polyethylene.
Claim 4
Dependent Claim
35 words
A thermoplastic molding composition as defined in claim 2 wherein the linear low density polyolefin is formed from ethylene and a C 3 to C 10 alpha olefin in a low pressure gas phase process.
Claim 5
Dependent Claim
35 words
A thermoplastic molding composition as defined in claim 1 wherein the linear low density polyolefin is formed from ethylene and a C 4 to C 8 alpha olefin in a low pressure gas phase process.
Claim 6
Dependent Claim
28 words
A thermoplastic molding composition as defined in claim 4 wherein the polycarbonate is of the formula: ##STR3## wherein A is a divalent aromatic radical of a dihydric phenol.
Claim 7
Dependent Claim
36 words
A thermoplastic molding composition as defined in claim 5 wherein the polycarbonate resin is of the formula: ##STR4## wherein R 1 and R 2 are hydrogen, (lower) alkyl or phenyl and n is at least 30.
Claim 8
Dependent Claim
53 words
A thermoplastic molding composition as defined in claim 4 wherein the linear low density polyolefin is a virgin ethylene copolymer formed from ethylene and at least one C 4 to C 8 alpha olefin, with a melt flow ratio of ≧22 to ≦32, and an unsaturated group content of ≦1 C=C/1000 carbon atoms.
Claim 9
Dependent Claim
32 words
A thermoplastic molding composition as defined in claim 7 which has a low temperature notched impact strength in excess of 10.0 ft. lb/in at -29° C. as measured according to ASTM D256.
Claim 10
Dependent Claim
26 words
A thermoplastic molding composition as defined in claim 7 which has a weld line strength in excess of 20 ft.lbs as measured according to ASTM D256.
Claim 11
Dependent Claim
23 words
A thermoplastic molding composition as defined in claim 4 wherein the linear low density polyolefin resin is a copolymer of ethylene and 1-butene.
Claim 12
Dependent Claim
25 words
A thermoplastic molding composition as defined in claim 10 wherein the multiphase composite interpolymer is derived from monomers which comprise methyl methacrylate and n-butyl acrylate.
Claim 13
Dependent Claim
18 words
A thermoplastic molding composition as defined in claim 1 which includes a reinforcing amount of a reinforcing filler.
Claim 14
Dependent Claim
16 words
A thermoplastic molding composition as defined in claim 12 wherein the reinforcing filler is filamentous glass.
Claim 15
Dependent Claim
20 words
A thermoplastic molding composition as defined in claim 1 which includes a flame retardant amount of a flame retardant agent.
Claim 16
Dependent Claim
19 words
A thermoplastic molding composition as defined in claim 13 which includes a flame retardant amount of a flame retardant.
Claim 17
Dependent Claim
42 words
A thermoplastic molding composition as defined in claim 1 wherein the multiphase composite interpolymer comprises a first stage derived from n-butyl acrylate and a final stage derived from methyl methacrylate and the linear low density polyolefin is formed from ethylene and 1-butene.
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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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |