Patent EP0273710A2 successfully refreshed from Google Patents.
EP0273710A2
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EP
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Resin having high refractive index, process for producing said resin and optical materials composed of said resin
Assignee: Nippon Shokubai Co Ltd
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Filing: 1987-12-23
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Granted: —
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Expires: 2007-12-23
Abstract
Abstract A process for producing a resin ahving a high refractive index which comprises radically polymerizing a material monomer, characterized in that said material monomer comprises [I] at least one polymerizable monomer selected from the group consisting of a polyfunctional thioacrylate and a polyfunctional thiomethacrylate (as an indispensable component), and optionally [II] at least one other polymerizable monomer which is radically polymerizable with said polymerizable monomer [I], a resin having a high refractive index produced by said process and optical materials, especially lenses and disk substrates prepared from said resin.
Inventors
- 👤 Tatsuhito Matsuda
- 👤 Yasuaki Funae
- 👤 Masahiro Yoshida
- 👤 Tsuguo Takaya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 18:35
CPC Classifications
C; C07; C07C; C07C327/00; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/38; C08F38/00; C08F38/02; G; G02; G02B; G02B1/00; G02B1/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
52 words
A process for producing a resin having a high refractive index which comprises radically polymerizing a material monomer, characterized in that said material monomer comprises [I] at least one polyfunctional thioacrylate or polyfunctional thiomethacrylate, and optionally [II] at least one other polymerizable monomer which is radically polymerizable with said polymerizable monomer [I].
Claim 2
Dependent Claim
52 words
A process for producing a resin having a high refractive index which comprises radically polymerizing a material monomer, characterized in that said material monomer comprises [I] at least one polyfunctional thioacrylate or polyfunctional thiomethacrylate, and optionally [II] at least one other polymerizable monomer which is radically polymerizable with said polymerizable monomer [I].
Claim 3
Dependent Claim
116 words
A process according to claim 1, wherein said polymerizable monomer [I] is of the general formula (1) wherein R₁ and R₂ represent H or CH₃, R₃ and R₄ independently represent H, CH₃ or OH, k and m independently represent an integer of 1 to 5, and ℓ and n independently represent 0 or an integer of 1 to 4, the general formula (2) wherein. R₁, R₂ and k are as defined in the general formula (1), and X represents O or S, or the general formula wherein R₁ and R₂ are as defined in the general formula (1), and R₅ represents a phenylene group, a xylylene group, a nucleus-substituted phenylene group or a nucleus-substituted xylylene group.
Claim 4
Dependent Claim
27 words
A process according to claim 1 or 2, wherein the content of said polymerizable monomer [I] is at least 5% by weight based on said material monomer.
Claim 5
Dependent Claim
25 words
A process according to claim 3, wherein the content of said polymerizable monomer [I] is at least 10% by weight based on said material monomer.
Claim 6
Dependent Claim
32 words
A process according to any one of claims 1 to 4, wherein there is used as said polymerizable monomer [II], a monomer whose homopolymer has a refractive index of at least 1.48.
Claim 7
Dependent Claim
16 words
A process according to claim 5, wherein said polymerizable monomer [II] is an unsaturated nitrile compound.
Claim 8
Dependent Claim
15 words
A process according to claim 6, wherein said unsaturated nitrile compound is acrylonitrile and/or methacrylonitrile.
Claim 9
Dependent Claim
25 words
A process according to any one of the preceding claims wherein said material monomer is heat polymerized in the presence of a radical polymerization initiator.
Claim 10
Dependent Claim
27 words
A process according to claim 8, wherein said radical polymerization initiator is used in an amount of 0.01 to 10% by weight based on said material monomer.
Claim 11
Dependent Claim
27 words
A process according to claim 9, wherein said radical polymerization initiator is used in an amount of 0.05 to 5% by weight based on said material monomer.
Claim 12
Dependent Claim
20 words
A resin having a high refractive index obtainable by a process as claimed in any one of the preceding claims.
Claim 13
Dependent Claim
15 words
A resin according to claim 11 which has a refractive index of at least 1.55.
Claim 14
Dependent Claim
14 words
An optical material prepared from a resin as claimed in claim 11 or 12.
Claim 15
Dependent Claim
12 words
An optical material according to claim 13 in the of a lens.
References Cited (Backward Citations)
No citation records indexed.
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