EP0119531A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Blends of aromatic polycarbonate resin, olefin polymers or copolymers and acrylate or methacrylate-copolymer resins
Assignee: General Electric Co
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Filing: 1984-03-05
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Granted: —
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Expires: 2004-03-05
Abstract
Abstract Thermoplastic molding compositions are described which comprise an admixture of (a) an aromatic polycarbonate resin, (b) an olefinic polymer or copolymer and (c) a third component which is a copolymer of an olefin and an acrylate, methacrylate, acrylic acid or methacrylic acid. The presence of the third component enhances impact strength in thicker sections and improves weld line strength.
Inventors
- 👤 David Earl Overton
- 👤 Ping Yuan Liu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:07
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
98 words
A thermoplastic composition, comprising an intimate blend of (a) a major proportion of an aromatic polycarbonate resin; (b) a minor proportion of a polyolefin, an olefin copolymer or a mixture thereof; and (c) a third polymeric component comprising a copolymer of one or more olefins and a monomeric acrylate, methacrylate, acrylic acid or methacrylic acid, the amount of (c) being at least sufficient to impart to the blend a resistance to impact failure in thick sections greater than that possessed by (a), and a weld line impact strength better than that possessed by (a) and (b) in combination.
Claim 2
Dependent Claim
98 words
A thermoplastic composition, comprising an intimate blend of (a) a major proportion of an aromatic polycarbonate resin; (b) a minor proportion of a polyolefin, an olefin copolymer or a mixture thereof; and (c) a third polymeric component comprising a copolymer of one or more olefins and a monomeric acrylate, methacrylate, acrylic acid or methacrylic acid, the amount of (c) being at least sufficient to impart to the blend a resistance to impact failure in thick sections greater than that possessed by (a), and a weld line impact strength better than that possessed by (a) and (b) in combination.
Claim 3
Dependent Claim
53 words
A composition according to Claim 1, in which (a) comprises from about 55 to about 93 parts by weight, (b) comprises from about 3.5 to about 30 parts by weight, and (c) comprises from about 3.5 to about 15 parts by weight per 100 parts by weight of (a), (b) and (c) combined.
Claim 4
Dependent Claim
26 words
A composition according to Claim 1, in which the aromatic polycarbonate resin has the formula wherein A is a divalent aromatic radical of a dihydric phenol.
Claim 5
Dependent Claim
78 words
A composition according to Claim 1, in which the aromatic polycarbonate resin has the formula wherein R 1 and R 2 are, independently, hydrogen, alkyl having from 1 to about 10 carbon atoms, or phenyl; X is, independently, alkyl having from 1 to about 10 carbon atoms, chloro, bromo or hydrogen; p and r are independently, from zero to 4; and n represents the total number of monomer units and is an integer of at least about 30.
Claim 6
Dependent Claim
16 words
A composition according to Claim 1, in which the aromatic polycarbonate resin is poly(bisphenol A Carbonate).
Claim 7
Dependent Claim
48 words
A compasition according to Claim 1, in which the olefin resin (b) is selected from the group consisting of polyethylene, polypropylene, polyisobutylene, a copolymer of ethylene and propylene, terpolymers of ethylene, propylene and a diene, a copolymer of ethylene and butene-1 and mixtures of any of the foregoing.
Claim 8
Dependent Claim
12 words
A composition according to Claim 1, in which component (b) comprises polypropylene.
Claim 9
Dependent Claim
22 words
A composition according to Claim 7, in which component (b) comprises polypropylene modified with a terpolymer of ethylene, propylene and a diene.
Claim 10
Dependent Claim
17 words
A composition according to Claim 1, in which component (b) comprises a copolymer of ethylene and propylene.
Claim 11
Dependent Claim
16 words
A composition according to Claim 1, in which component (b) comprises a linear low density polyethylene.
Claim 12
Dependent Claim
18 words
A composition according to Claim 1, in which component (c) comprises a copolymer of ethylene and ethyl acrylate.
Claim 13
Dependent Claim
19 words
A composition according to Claim 1, in which component (c) comprises a terpolymer of ethylene, propylene and acrylic acid.
Claim 14
Dependent Claim
15 words
A composition according to Claim 1, wherein a reinforcing amount of a filler is present.
Claim 15
Dependent Claim
12 words
A composition according to Claim 13, wherein said filler comprises glass fiber.
Claim 16
Dependent Claim
24 words
A composition according to Claim 1, wherein a flame retardant effective amount of a metal salt of an organic sulfonic acid is also present.
Claim 17
Dependent Claim
39 words
An article which has been molded from a composition according to Claim 1, said article being characterized by improved resistance to environmental stress cracking and crazing in comparison with a corresponding article consisting of the aromatic polycarbonate resin alone.
References Cited (Backward Citations)
No citation records indexed.
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