EP0234726A2
Expired / Lapsed
EP
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Methacrylate resin composition and process for its preparation
Assignee: Mitsubishi Chemical Corp
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Filing: 1987-01-22
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Granted: —
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Expires: 2007-01-22
Abstract
Abstract A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the follow- inn formula wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and having a yellowness index (Yis) of at most 3 as measured in the form of a solution of the heated resin composition and a total light transmittance of from 89 to 95%. It may be made by reaction of ammonia or an amine with a methyl methacrylate resin that contains, at most, 1000 ppm dimer, and that is dissolved in a mixture of solvents.
Inventors
- 👤 Hisao Anzai
- 👤 Hideaki Makino
- 👤 Isao Sasaki
- 👤 Kozi Nishida
- 👤 Masaru Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08F; C08F8/00; C08F8/48; C08F8/30; C08F8/32; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition and a total light transmittance of from 89 to 95%.
Claim 2
Dependent Claim
69 words
A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition and a total light transmittance of from 89 to 95%.
Claim 3
Dependent Claim
38 words
The methacrylate resin composition according to Claim 1, wherein the yellowness index (YIs) as measured in the form of the heated resin composition is from 0.1 to 1, and the total light transmittance is from 92 to 94%.
Claim 4
Dependent Claim
65 words
A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and having a yellowness index (YIp) of at most 2.7 as measured in the form of a molded plate and a total light transmittance of from 89 to 95%.
Claim 5
Dependent Claim
65 words
A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and having a yellowness index (YIp) of at most 2.7 as measured in the form of a molded plate and a total light transmittance of from 89 to 95%.
Claim 6
Dependent Claim
37 words
The methacrylate resin composition according to Claim 3, wherein the yellowness index (YIp) as measured in the form of a molded plate is from 0.2 to 1.5, and the total light transmittance is from 92 to 94%.
Claim 7
Dependent Claim
86 words
A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition, a yellowness index (YIp) of at most 2.7 as measured in the form of a molded plate and a total light transmittance of from 89 to 95%.
Claim 8
Dependent Claim
86 words
A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition, a yellowness index (YIp) of at most 2.7 as measured in the form of a molded plate and a total light transmittance of from 89 to 95%.
Claim 9
Dependent Claim
56 words
The methacrylate resin composition according to Claim 5, wherein the yellowness index (YIs) as measured in the form of the heated resin composition is from 0.1 to 1, the yellowness index (YIp) as measured in the form of a molded plate is from 0.2 to 1.5, and the total light transmittance is from 92 to 94%.
Claim 10
Dependent Claim
95 words
A process for preparing a methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, which comprises reacting a resin comprising methyl methacrylate units as the main constituent units and having a methyl methacrylate dimer content of not higher than 1,000 ppm, with an amine of the formula RNH2wherein R is as defined above, under a condition such that said resin is dissolved in a solvent mixture for the resin.
Claim 11
Dependent Claim
95 words
A process for preparing a methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, which comprises reacting a resin comprising methyl methacrylate units as the main constituent units and having a methyl methacrylate dimer content of not higher than 1,000 ppm, with an amine of the formula RNH2wherein R is as defined above, under a condition such that said resin is dissolved in a solvent mixture for the resin.
Claim 12
Dependent Claim
36 words
The process for preparing a methacrylic resin composition according to Claim 7, wherein the methyl methacrylate dimer content in the resin comprising methyl methacrylate units as the main constituent units, is not higher than 250 ppm.
Claim 13
Dependent Claim
34 words
The process for preparing a methacrylate resin composition according to Claim 7, wherein the solvent mixture for the resin is a mixture of benzene, toluene, xylene or a mixture thereof, and an aliphatic alcohol.
Claim 14
Dependent Claim
73 words
The process for preparing a methacrylate resin composition according to Claim 7, wherein the proportions of (1) the resin, (2) benzene, toluene, xylene or a mixture thereof in the solvent mixture and (3) the aliphatic alcohol in the solvent mixture, are from 5 to 80 parts by weight, from 19 to 94 parts by weight and from 1 to 76 parts by weight, respectively (relative to the total of 100 parts by weight).
Claim 15
Dependent Claim
30 words
The process for preparing a methacrylate resin composition according to Claim 9, wherein the aliphatic alcohol is methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, butyl alcohol or isobutyl alcohol.
Claim 16
Dependent Claim
24 words
The process according to any of claims 7 to 11, wherein the product is a product according to any of claims 1 to 6.
References Cited (Backward Citations)
No citation records indexed.
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