US4481331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate resin mixture
Assignee: General Electric Co
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Filing: 1983-03-22
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Granted: 1984-11-06
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Expires: 2003-03-22
Abstract
Abstract Novel compositions with high resistance to environmental stress cracking and crazing comprise: (a) an aromatic carbonate polymer; and (b) a modifer combination therefor comprising: (i) 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 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 from 1 to 10; (ii) an olefin-acrylate or methacrylate copolymer, alone, or in further combination with (iii) a polyolefin.
Inventors
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:04
CPC Classifications
C; C08; C08L; C08L69/00; Y; Y10; Y10S; Y10S525/00; Y10S525/901; Y10S525/94
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
190 words
A resin mixture comprising: (a) an aromatic polycarbonate resin; and (b) a modifier combination therefor comprising (i) 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; (ii) a copolymer of an olefin and at least one of a C 1 -C 6 alkyl acrylate, a C 1 -C 6 alkyl methacrylate acrylic acid, methacrylic acid, or mixtures of any of the foregoing, said modifier being present in said mixture in an amount at least sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein (a) comprises from about 50 to 96 parts by weight of (a) and (b) together and (b)(i) comprises from about 2 to 25 parts by weight and (b)(ii) is from about 2 to 25 parts by weight, per parts by weight of (a) and (b) together.
Claim 2
Dependent Claim
190 words
A resin mixture comprising: (a) an aromatic polycarbonate resin; and (b) a modifier combination therefor comprising (i) 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; (ii) a copolymer of an olefin and at least one of a C 1 -C 6 alkyl acrylate, a C 1 -C 6 alkyl methacrylate acrylic acid, methacrylic acid, or mixtures of any of the foregoing, said modifier being present in said mixture in an amount at least sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein (a) comprises from about 50 to 96 parts by weight of (a) and (b) together and (b)(i) comprises from about 2 to 25 parts by weight and (b)(ii) is from about 2 to 25 parts by weight, per parts by weight of (a) and (b) together.
Claim 3
Dependent Claim
38 words
A resin mixture as defined in claim 1 wherein the amount of modifier combination (b) ranges from about 4.0 to about 50 parts by weight per 100 parts by weight of resin (a) and modifier combination (b) together.
Claim 4
Dependent Claim
32 words
A resin mixture as defined in claim 1 wherein the aromatic carbonate polymer comprises recurring structural units of the formula: ##STR2## wherein A is a divalent aromatic radical of a dihydric phenol.
Claim 5
Dependent Claim
20 words
A resin mixture as defined in claim 3 wherein in said formula, A is derived from a 4,4'-dihydroxy-di-(mononuclear aryl) alkane.
Claim 6
Dependent Claim
16 words
A resin mixture as defined in claim 1 wherein said aromatic polycarbonate (a) comprises poly(2,2-dihydroxydiphenylpropane) carbonate.
Claim 7
Dependent Claim
43 words
A resin mixture as defined in claim 1 wherein said selectively hydrogenated block copolymer resin (b)(i), (A) and (A') are selected from styrene, alpha-methylstyrene, p-methyl styrene, vinyl toluene, vinyl xylene and vinyl naphthalene and (B) is selected from butadiene, isoprene, 1,3-pentadiene and 2,3-dimethyl-butadiene.
Claim 8
Dependent Claim
33 words
A resin mixture as defined in claim 6 wherein in said selectively hydrogenated block copolymer resin (b)(i), (A) is a styrene block, (B) is a diolefin block, and (A') is a styrene block.
Claim 9
Dependent Claim
45 words
A resin mixture as defined in claim 7 wherein in component (b)(i) terminal blocks (A) and (A') each have weight average molecular weights of about 2,000 to 60,000 respectively, and center block (B) has a weight average molecular weight of from about 20,000 to 450,000.
Claim 10
Dependent Claim
21 words
A resin mixture as defined in claim 1, wherein said copolymer component (b)(ii) comprises a copolymer of ethylene and ethyl acrylate.
Claim 11
Dependent Claim
57 words
A resin mixture as defined in claim 1 wherein component (a) comprises from about 70 to 94 parts by weight; component (b)(i) comprises from about 3 to about 15 parts by weight; and component (b)(ii) comprises from about 3 to about 15 parts by weight, per 100 parts by weight of components (a), (b)(i) and (b)(ii) combined.
Claim 12
Dependent Claim
165 words
A resin mixture comprising: (a) an aromatic polycarbonate resin; and (b) a modifier combination therefor comprising: (i) 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; (ii) a copolymer of an olefin and at least one of a C 1 -C 6 alkyl acrylate, C 1 -C 6 alkyl methacrylate, acrylic acid, or methacrylic acid; and (iii) a polyolefin resin, said modifier being present in an amount sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein (a) comprises from about 50 to 96 parts by weight of (a) and (b) together and (b) is about 4 to 50 parts of (a) and (b) together.
Claim 13
Dependent Claim
165 words
A resin mixture comprising: (a) an aromatic polycarbonate resin; and (b) a modifier combination therefor comprising: (i) 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; (ii) a copolymer of an olefin and at least one of a C 1 -C 6 alkyl acrylate, C 1 -C 6 alkyl methacrylate, acrylic acid, or methacrylic acid; and (iii) a polyolefin resin, said modifier being present in an amount sufficient to impart to said mixture a resistance to environmental stress crazing and cracking greater than that possessed by said polycarbonate resin wherein (a) comprises from about 50 to 96 parts by weight of (a) and (b) together and (b) is about 4 to 50 parts of (a) and (b) together.
Claim 14
Dependent Claim
38 words
A resin mixture as defined in claim 11 wherein the amount of modifier combination (b) ranges from about 4.0 to about 50 parts by weight per 100 parts by weight of resin (a) and modifier combination (b) together.
Claim 15
Dependent Claim
32 words
A resin mixture as defined in claim 11 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 16
Dependent Claim
20 words
A resin mixture as defined in claim 13 wherein in said formula, A is derived from a 4,4-dihydroxy-di(mononuclear aryl) alkane.
Claim 17
Dependent Claim
16 words
A resin mixture as defined in claim 11, wherein said aromatic polycarbonate (a) comprises poly-bis(4-hydroxyphenyl propane)carbonate.
Claim 18
Dependent Claim
44 words
A resin mixture as defined in claim 11 wherein in said selectively hydrogenated block copolymer resin (b)(i), (A) and (A') are selected from styrene, alpha-methylstyrene, p-methyl styrene, vinyl toluene, vinyl xylene, and vinyl naphthalene and (B) is selected from butadiene, isoprene, 1,3-pentadiene and 2,3-dimethylbutadiene.
Claim 19
Dependent Claim
33 words
A resin mixture as defined in claim 16 wherein in said selectively hydrogenated block copolymer resin (b)(i), (A) is a styrene block, (B) is a diolefin block, and (A') is a styrene block.
Claim 20
Dependent Claim
45 words
A resin mixture as defined in claim 17, wherein in component (b)(i) terminal blocks (A) and (A') each have weight average molecular weight of about 2,000 to 60,000 respectively, and center block (b) has a weight average molecular weight of from about 20,000 to 450,000.
Claim 21
Dependent Claim
21 words
A resin mixture as defined in claim 11, wherein said copolymer component (b)(ii) comprises a copolymer of ethylene and ethyl acrylate.
Claim 22
Dependent Claim
27 words
A resin mixture as defined in claim 11, wherein said polyolefin resin (b)(iii) is selected from a polyethylene resin, a polypropylene resin or an ethylene-propylene copolymer resin.
Claim 23
Dependent Claim
20 words
A resin mixture as defined in claim 11, wherein said polyolefin resin (b)(iii) is a linear low density polyolefin resin.
Claim 24
Dependent Claim
22 words
A resin mixture as defined in claim 20 wherein said linear low density polyolefin resin is a linear low density polyethylene resin.
Claim 25
Dependent Claim
22 words
A resin mixture as defined in claim 22 wherein said linear low density polyethylene resin is a copolymer of ethylene and butene-1.
Claim 26
Dependent Claim
71 words
A resin mixture as defined in claim 11 wherein component (a) comprises from about 60 to about 92 parts by weight; component (b)(i) comprises from about 5 to about 15 parts by weight; component (b)(ii) comprises from about 2 to about 15 parts by weight; and component (b)(iii) comprises from about 1 to about 10 parts by weight, per 100 parts by weight of components (a), (b)(i), (b)(ii) and (b)(iii) combined.
Claim 27
Dependent Claim
9 words
An article molded from the composition of claim 1.
Claim 28
Dependent Claim
9 words
An article molded from the composition of claim 11.
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) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |