Patent US4369299A successfully refreshed from Google Patents.
US4369299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic resin having excellent solvent resistance and moldability
Assignee: Asahi Kasei Corp
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Filing: 1980-02-29
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Granted: 1983-01-18
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Expires: 2000-02-29
Abstract
Abstract An acrylic resin having an intrinsic viscosity [η] of about 0.028 to about 0.117 l/g and a weight-average molecular weight to number-average molecular weight ratio (Mw/Mn), measured by gel permeation chromatography of about 2.3 to about 6.0, said resin comprising the polymerization product of (1) about 50 to 100 wt. % of methyl methacrylate and (2) 0 to about 50 wt. % of at least one monomer selected from the group consisting of acrylic ester monomer and methacrylic ester monomer, said acrylic ester monomer comprising the reaction product of an alkyl alcohol having 1 to 8 carbon atoms and acrylic acid and said methacrylic ester comprising the reaction product of an alkyl alcohol having 2 to 12 carbon atoms and methacrylic acid.
Inventors
- 👤 Makoto Honda
- 👤 Kohe Ozawa
- 👤 Kazuhiro Hosoya
- 👤 Jiro Kurita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:45
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/14; C08F2/00; C08F2/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
An acrylic resin having an intrinsic viscosity [η] of about 0.028 to about 0.117 l/g and a weight-average molecular weight to number-average molecular weight ratio (Mw/Mn), measured by gel permeation chromatography of about 2.3 to about 6.0, said resin comprising the polymerization product of (1) about 50 to 100 wt. % of methyl methacrylate and (2) 0 to about 50 wt. % of at least one monomer selected from the group consisting of acrylic ester monomer amd methacrylic ester monomer, said acrylic ester monomer comprising the reaction product of an alkyl alcohol having 1 to 8 carbon atoms and acrylic acid and said methacrylic ester comprising the reaction product of an alkyl alcohol having 2 to 12 carbon atoms and methacrylic acid.
Claim 2
Dependent Claim
122 words
An acrylic resin having an intrinsic viscosity [η] of about 0.028 to about 0.117 l/g and a weight-average molecular weight to number-average molecular weight ratio (Mw/Mn), measured by gel permeation chromatography of about 2.3 to about 6.0, said resin comprising the polymerization product of (1) about 50 to 100 wt. % of methyl methacrylate and (2) 0 to about 50 wt. % of at least one monomer selected from the group consisting of acrylic ester monomer amd methacrylic ester monomer, said acrylic ester monomer comprising the reaction product of an alkyl alcohol having 1 to 8 carbon atoms and acrylic acid and said methacrylic ester comprising the reaction product of an alkyl alcohol having 2 to 12 carbon atoms and methacrylic acid.
Claim 3
Dependent Claim
47 words
An acrylic resin of claim 1, wherein the amount of methyl methacrylate (1) is in the range of from about 80 to 100 wt. % and the amount of the said monomer or monomers (2) is in the range of from 0 to about 20 wt. %.
Claim 4
Dependent Claim
16 words
An acrylic resin of claim 1, wherein the ratio Mw/Mn is of from 2.5 to 6.0.
Claim 5
Dependent Claim
64 words
An acrylic resin of claim 2, wherein the resin has a melt index of from 0.1 to 20 g/10 min, a swell of from 25 to 40%, as measured under conditions of ASTM D-1238 (230° C., 3.8 kg), and a falling-weight impact strength of at least 5 kg/cm, as measured on a 50% failure energy test with 2-mm plates in accordance with JIS K-7211.
Claim 6
Dependent Claim
67 words
An acrylic resin of claim 4, wherein intrinsic viscosity [η] is in the range of from 0.033 to 0.117 l/g; Mw/Mn is in the range of from 2.3 to 4.0, as measured by gel permeation chromatography; the fraction having molecular weight of not less than 1,000,000 is not more than 2.5%, and the fraction having molecular weight of not more than 20,000 is not more than 25%.
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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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |