UV-curable fresnel lens resin composition, fresnel lens, and back projection screen
First Claim
1. A Fresnel lens comprising a resin formed by UV cure of a resin composition in situ on a sheet or plate made of a methyl methacrylate polymer or copolymer, wherein said resin composition comprises:
- (A1) an acrylate or methacrylate containing hydroxyl group and aromatic ring;
(A2) a urethane group-containing acrylate or methacrylate having a moiety of an aromatic diol (a1) represented by the following general formula;
##STR3## wherein Ph represents 1,4-phenylene group R1, R2 and R3 each represents a hydrogen atom or methyl group, m and n each represents an integer of 1 to 15, and (m+n) is equal to 2 to 20;
(A3) an aromatic ring-containing monofunctional acrylate or methacrylate;
(B) a photopolymerization initiator; and
(C3) a plasticizer with a solubility parameter in the range of 10.0 to 11.5.
1 Assignment
0 Petitions
Accused Products
Abstract
UV-curable Fresnel lens resin compositions 1a! comprising a (meth)acrylate containing hydroxyl group and aromatic ring (A1), a urethane group-containing (meth)acrylate (A2) comprising an aromatic diol, an aromatic ring-containing monofunctional (meth)acrylate (A3), and a photopolymerization initiator (B) and 1b! comprising (A1), a mono- or di(meth)acrylate monomer (A4), and (B), further supplemented with a polyester (C1) comprising an aromatic diol and a phosphate (C2) for the formation of a Fresnel lens on a sheet or plate made of a methyl methacrylate (co)polymer; a Fresnel lens formed by UV cure of composition 1a! or 1b!; and a rear projection screen including a sheet or plate carrying said Fresnel lens. The Fresnel lens has high refractive index, antistatic properties and is satisfactory in adhesion to a sheet or plate.
25 Citations
12 Claims
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1. A Fresnel lens comprising a resin formed by UV cure of a resin composition in situ on a sheet or plate made of a methyl methacrylate polymer or copolymer, wherein said resin composition comprises:
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(A1) an acrylate or methacrylate containing hydroxyl group and aromatic ring; (A2) a urethane group-containing acrylate or methacrylate having a moiety of an aromatic diol (a1) represented by the following general formula;
##STR3## wherein Ph represents 1,4-phenylene group R1, R2 and R3 each represents a hydrogen atom or methyl group, m and n each represents an integer of 1 to 15, and (m+n) is equal to 2 to 20;(A3) an aromatic ring-containing monofunctional acrylate or methacrylate; (B) a photopolymerization initiator; and (C3) a plasticizer with a solubility parameter in the range of 10.0 to 11.5. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A Fresnel lens comprising a resin formed by UV cure of a resin composition in situ on a sheet or plate made of a methyl methacrylate polymer or copolymer, wherein said resin composition comprises:
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(A1) an acrylate or methacrylate containing hydroxyl group and aromatic ring; (A2) a urethane group-containing acrylate or methacrylate having a moiety of an aromatic diol (a1) represented by the following general formula;
##STR4## wherein Ph represents 1,4-phenylene group, R1, R2 and R3 each represents a hydrogen atom or methyl group, m and n each represents an integer of 1 to 15, and (m+n) is equal to 2 to 20;(A3) an aromatic ring-containing monofunctional acrylate or methacrylate; (B), a photopolymerization initiator; and (C2) a phosphate of the following general formula (2);
space="preserve" listing-type="equation"> R(OCH.sub.2 CH.sub.2).sub.S O!.sub.t PO(OH).sub.(3-t) (
2)wherein R represents an alkyl group containing 5 to 16 carbon atoms, s represents an integer of 1 to 4, and t represents an integer of 1 or 2. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification