US4558098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methacrylic resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1983-12-19
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Granted: 1985-12-10
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Expires: 2003-12-19
Abstract
Abstract There is provided a heat-resistant methacrylic resin composition, which comprises 1 to 99% by weight of a copolymer [I] obtained by copolymerizing methyl methacrylate, an aromatic vinyl compound and maleic anhydride and 99 to 1% by weight of a copolymer [II] obtained by copolymerizing 80 to 100% by weight of methyl methacrylate and 0 to 20% by weight of other copolymerizable ethylenic monomer. The resin composition according to the present invention is excellent in characteristics such as optical characteristics, mechanical properties, weathering resistance and molding processability as well as in productivity.
Inventors
- 👤 Kazumasa Kamata
- 👤 Yoshio Nakai
- 👤 Yasunori Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:10
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L35/00; C08L35/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
121 words
A heat-resistant transparent methacrylic resin composition which comprises 5 to 95% by weight of a copolymer [I] obtained by (A) copolymerizing 40 to 98% by weight of methyl methacrylate, 1 to 25% by weight of an aromatic vinyl compound and 1 to 25% by weight of maleic anhydride or (B) copolymerizing 40 to 97% by weight of methyl methacrylate, 1 to 20% by weight of an alpha-methyl styrene, 1 to 20% by weight of styrene or vinyl toluene and 1 to 20% by weight of maleic anhydride and 95 to 5% by weight of polymer [II] obtained by copolymerizing 80 to 100% by weight of methyl methacrylate and 0 to 20% by weight of at least one other copolymerizable ethylenic monomer.
Claim 2
Dependent Claim
121 words
A heat-resistant transparent methacrylic resin composition which comprises 5 to 95% by weight of a copolymer [I] obtained by (A) copolymerizing 40 to 98% by weight of methyl methacrylate, 1 to 25% by weight of an aromatic vinyl compound and 1 to 25% by weight of maleic anhydride or (B) copolymerizing 40 to 97% by weight of methyl methacrylate, 1 to 20% by weight of an alpha-methyl styrene, 1 to 20% by weight of styrene or vinyl toluene and 1 to 20% by weight of maleic anhydride and 95 to 5% by weight of polymer [II] obtained by copolymerizing 80 to 100% by weight of methyl methacrylate and 0 to 20% by weight of at least one other copolymerizable ethylenic monomer.
Claim 3
Dependent Claim
25 words
A heat-resistant methacrylic resin composition according to claim 1, wherein the aromatic vinyl compound is selected from the group consisting of α-methylstyrene, styrene and vinyltoluene.
Claim 4
Dependent Claim
45 words
A heat-resistant methacrylic resin composition according to claim 1, wherein the copolymer [I] is a copolymer obtained by copolymerizing 50 to 98% by weight of methyl methacrylate, 1 to 25% by weight of styrene or vinyltoluene and 1 to 25% by weight of maleic anhydride.
Claim 5
Dependent Claim
43 words
A heat-resistant methacrylic resin composition according to claim 1, wherein the copolymer [I] is a copolymer obtained by copolymerizing 50 to 98% by weight of methyl methacrylate, 1 to 25% by weight of α-methylstyrene and 1 to 25% by weight of maleic anhydride.
Claim 6
Dependent Claim
53 words
A heat-resistant methacrylic resin composition according to claim 1, wherein the copolymer [I] is a copolymer obtained by copolymerizing 40 to 97% by weight of methyl methacrylate, 1 to 20% by weight of styrene or vinyl toluene, 1 to 20% by weight of α-methylstyrene and 1 to 20% by weight of maleic anhydride.
Claim 7
Dependent Claim
58 words
A heat-resistant methacrylic resin composition according to claim 1, wherein the other copolymerizable ethylenic monomer is at least one selected from the group consisting of an alkyl acrylate of which the alkyl group has 1 to 12 carbon atoms, an alkyl methacrylate of which the alkyl group has 2 to 12 carbon atoms, cyclohexyl methacrylate, styrene and acrylonitrile.
Claim 8
Dependent Claim
40 words
A heat-resistant methacrylic resin composition according to claim 1, consisting of not less than 10 and less than 90% by weight of the copolymer [I] and more than 10 and not more than 90% by weight of the copolymer [II].
Claim 9
Dependent Claim
30 words
A heat-resistant methacrylic resin composition according to claim 7, consisting of 15 to 85% by weight of the copolymer [I] and 85 to 15% by weight of the copolymer [II].
Claim 10
Dependent Claim
30 words
A heat-resistant methacrylic resin composition according to claim 8, consisting of 20 to 80% by weight of the copolymer [I] and 80 to 20% by weight of the copolymer [II].
Claim 11
Dependent Claim
28 words
A heat-resistant methacrylic resin composition according to claim 1, having a heat distortion temperature of 105° C. or higher as measured according to the method of ASTM D-648.
Claim 12
Dependent Claim
28 words
A heat-resistant methacrylic resin composition according to claim 10, having a heat distortion temperature of 110° C. or higher as measured according to the method of ASTM D-648.
Claim 13
Dependent Claim
28 words
A heat-resistant methacrylic resin composition according to claim 11, having a heat distortion temperature of 115° C. or higher as measured according to the method of ASTM D-648.
Claim 14
Dependent Claim
45 words
A heat-resistant methacrylic resin composition according to claim 3, wherein the copolymer [I] is a copolymer obtained by copolymerizing 65 to 90% by weight of methyl methacrylate, 5 to 20% by weight of styrene or vinyltoluene and 5 to 15% by weight of maleic anhydride.
Claim 15
Dependent Claim
43 words
A heat-resistant methacrylic resin composition according to claim 4, wherein the copolymer [I] is a copolymer obtained by copolymerizing 65 to 90% by weight of methyl methacrylate, 5 to 18% by weight of α-methylstyrene and 5 to 17% by weight of maleic anhydride.
Claim 16
Dependent Claim
52 words
A heat-resistant methacrylic resin composition according to claim 5, wherein the copolymer [I] is a copolymer obtained by copolymerizing 60 to 90% by weight of methyl methacrylate, 1 to 10% by weight of α-methylstyrene, 5 to 15% by weight of styrene or vinyltoluene and 4 to 15% by weight of maleic anhydride.
Claim 17
Dependent Claim
37 words
A heat-resistant methacrylic resin composition according to claim 3, wherein the ratio of α/γ (where α is a mole number of styrene or vinyltoluene and γ is a mole number of maleic anhydride) is 0.9 to 1.7.
Claim 18
Dependent Claim
35 words
A heat-resistant methacrylic resin composition according to claim 4, wherein the ratio of β/γ (where β is a mole number of α-methylstyrene and γ is a mole number of maleic anhydride) is 0.9 to 1.7.
Claim 19
Dependent Claim
44 words
A heat-resistant methacrylic resin composition according to claim 5, wherein the ratio of (α+β)/γ (where α is a mole number of styrene or vinyltoluene, β is a mole number of α-methylstyrene and γ is a mole number of maleic anhydride) is 0.9 to 1.7.
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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |