EP0097948A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Information recording substrate
Assignee: Mitsubishi Chemical Corp
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Filing: 1983-06-27
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Granted: —
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Expires: 2003-06-27
Abstract
Abstract A methacrylic resin having reduced water absorption properties is produced by polymerizing a mixture consisting of (A) 50 to 85% by weight of a methyl methacrylate, (B) 15 to 50 by weight of a cyclohexyl methacrylate and (C) 0 to 30% by weight of the other copolymerizable with said monomer (A) and (B), or partially polymerized product thereof. The methacrylic resin can suitably be used to various optical equipments, information recording substrates and so on.
Inventors
- 👤 Kazumasa Kamada
- 👤 Katsumi Tamai
- 👤 Yasunori Simomura
- 👤 Kazunori Abe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 21:32
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/0057; G11B23/0064; G11B23/0092; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14; G02; G02B; G02B1/00; G02B1/04; G02B1/041
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A process for producing a low hygroscopic methacrylic resin, which comprises polymerizing a mixture consisting of (A) methyl methacrylate in an amount of 50 to 85% by weight (B) cyclohexyl methacrylate in an amount of 15 to 50% by weight, and (C) other monomer copolymerizable with said monomers (A) and (B) in an amount 0 to 30 by weight, or partially polymerized product thereof.
Claim 2
Dependent Claim
64 words
A process for producing a low hygroscopic methacrylic resin, which comprises polymerizing a mixture consisting of (A) methyl methacrylate in an amount of 50 to 85% by weight (B) cyclohexyl methacrylate in an amount of 15 to 50% by weight, and (C) other monomer copolymerizable with said monomers (A) and (B) in an amount 0 to 30 by weight, or partially polymerized product thereof.
Claim 3
Dependent Claim
14 words
A process according to claim 1, wherein the other copolymerizable monomer (C) is styrene.
Claim 4
Dependent Claim
15 words
A process according to claim 1, wherein the other copolymerizable monomer (C) is methyl acrylate.
Claim 5
Dependent Claim
23 words
A process according to claim 1, wherein the other copolymerizable monomer (C) is added in an amount of 0 to 20% by weight.
Claim 6
Dependent Claim
32 words
A process according to claim 1, wherein the monomer mixture or partially polymerized monomer mixture is subjected to polymerization in an enclosed mold and under the presence of a radical polymerization initiator.
Claim 7
Dependent Claim
19 words
A process according to any one of the preceeding claims, wherein the methacrylic resin is a methacrylic resin plate.
Claim 8
Dependent Claim
59 words
A process for producing a low hygroscopic methacrylic resin for optical equipments or information recording substrates, which comprises polymerizing a mixture consisting of (A) 50 to 85% by weight of methyl methacrylate, (B) 15 to 50% by weight of cyclohexyl methacrylate, and (C) 0 to 30% by weight of butyl acrylate or methyl acrylate, or partially polymerized product thereof.
Claim 9
Dependent Claim
59 words
A process for producing a low hygroscopic methacrylic resin for optical equipments or information recording substrates, which comprises polymerizing a mixture consisting of (A) 50 to 85% by weight of methyl methacrylate, (B) 15 to 50% by weight of cyclohexyl methacrylate, and (C) 0 to 30% by weight of butyl acrylate or methyl acrylate, or partially polymerized product thereof.
References Cited (Backward Citations)
No citation records indexed.
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