Patent US5314950A successfully refreshed from Google Patents.
US5314950A
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Heat resistant resin composition comprising polymers of N-(substituted) maleimides and improved process for the preparation of said maleimides
Assignee: Cytec Technology Corp
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Filing: 1993-01-22
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Granted: 1994-05-24
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Expires: 2013-01-22
Abstract
Abstract Novel resin compositions are provided which possess excellent heat resistance and thermal color stability, alone, or in admixture with bulk resins. The claimed resin compositions comprise homo- and/or copolymers of N-(2,3-dimethylphenyl) maleimide, alone, or in further combination with resins composed of copolymer components, such as vinyl copolymers and rubber-grafted vinyl copolymer resins. The resin compositions have improved heat resistance and produce molded articles with desirably light colors. Also provided is an improved process to make maleimide monomers by using selected polar solvents whereby the amount of uncyclizable trans-amic acid is held at tolerable levels and the desired maleimide is obtained in high yields, free from by-products.
Inventors
- 👤 Balwant Singh
- 👤 Robert J. Tynik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:12
CPC Classifications
C; C08; C08L; C08L35/00; C08L35/06; C08L51/00; C08L51/04; C08L2201/00; C08L2201/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
A heat resistant, compatible resin composition comprising: (a) a homopolymer of N-(2,3-dimethylphenyl)maleimide; and (b1) a copolymer prepared by copolymerizing one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers (b2) a graft copolymer prepared by copolymerizing (i) a rubbery polymer, (ii) N-(2,3-dimethylphenyl) maleimide, and (iii) one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers; or (b3) a mixture of (b1) and (b2), wherein said homopolymer component (a) and said copolymer component (b) (1, 2 or 3) are present in a ratio of 5:95 to 95:5 parts by weight in the resin composition.
Claim 2
Dependent Claim
139 words
A heat resistant, compatible resin composition comprising: (a) a homopolymer of N-(2,3-dimethylphenyl)maleimide; and (b1) a copolymer prepared by copolymerizing one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers (b2) a graft copolymer prepared by copolymerizing (i) a rubbery polymer, (ii) N-(2,3-dimethylphenyl) maleimide, and (iii) one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers; or (b3) a mixture of (b1) and (b2), wherein said homopolymer component (a) and said copolymer component (b) (1, 2 or 3) are present in a ratio of 5:95 to 95:5 parts by weight in the resin composition.
Claim 3
Dependent Claim
36 words
A composition as defined in claim 1 wherein said homopolymer component (a) and said copolymer component (b) (1,2 or 3) are present in a ratio of 10:90 to 90:10 parts by weight in the resin composition.
Claim 4
Dependent Claim
36 words
A composition as defined in claim 2 wherein said homopolymer component (a) and said copolymer component (b) (1,2 or 3) are present in a ratio of 15:85 to 85:15 parts by weight in the resin composition.
Claim 5
Dependent Claim
18 words
A composition as defined in claim 1 having a single glass transition temperature, Tg, as determined by DSC.
Claim 6
Dependent Claim
22 words
A composition as defined in claim 1 comprising (a) a homopolymer of N-(2,3-dimethylphenyl) maleimide; and (b1) a copolymer of styrene and acrylonitrile.
Claim 7
Dependent Claim
138 words
A heat resistant, compatible resin composition comprising: (a1) a copolymer comprising poly-(N-(2,3-dimethylphenyl)maleimide-co-styrene); and (b1) a copolymer prepared by copolymerizing one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers; (b2) a graft copolymer prepared by copolymerizing (i) a rubbery polymer, (ii) N-(2,3-dimethylphenyl) maleimide, and (iii) one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers; or (b3) a mixture of (b1) and (b2), wherein said copolymer component (a1) and said copolymer component (b) (1,2 or 3) are present in a ratio of 5:95 to 95:5 parts by weight in the resin composition.
Claim 8
Dependent Claim
138 words
A heat resistant, compatible resin composition comprising: (a1) a copolymer comprising poly-(N-(2,3-dimethylphenyl)maleimide-co-styrene); and (b1) a copolymer prepared by copolymerizing one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers; (b2) a graft copolymer prepared by copolymerizing (i) a rubbery polymer, (ii) N-(2,3-dimethylphenyl) maleimide, and (iii) one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers; or (b3) a mixture of (b1) and (b2), wherein said copolymer component (a1) and said copolymer component (b) (1,2 or 3) are present in a ratio of 5:95 to 95:5 parts by weight in the resin composition.
Claim 9
Dependent Claim
36 words
A composition as defined in claim 6 wherein said copolymer component (a1) and said copolymer component (b) (1,2 or 3) are present in a ratio of 10:90 to 90:10 parts by weight in the resin composition.
Claim 10
Dependent Claim
36 words
A composition as defined in claim 7 wherein said copolymer component (a1) and said copolymer component (b) (1,2 or 3) are present in a ratio of 15:85 to 85:15 parts by weight in the resin composition.
Claim 11
Dependent Claim
18 words
A composition as defined in claim 6 having a single glass transition temperature, Tg, as determined by DSC.
Claim 12
Dependent Claim
21 words
A composition as defined in claim 6 comprising (a1) a copolymer comprising poly-(N-(2,3-dimethylphenyl)maleimide-co-styrene); and (b1) a copolymer of styrene and acrylonitrile.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |