US 6,440,519 B1 · Photocurable adhesive for optical disk

Abstract

A photocurable resin composition which comprises (A) a urethane (meth)acrylate oligomer obtained by the reaction of (a) at least one polyol compound preferably selected from the group consisting of polyester polyols and polycarbonate polyols, (b) a polyisocyanate compound, and (c) a hydroxyl group-containing (meth)acrylate compound; (B) a (meth)acrylolylphosphate; (C) a multifunctional (meth)acrylate compound; and (D) a photopolymerization initiator and, optionally, (E) an organosilyl-containing mercapto compound. The composition exhibits a fast cure speed, and the cured products obtained from the composition exhibit superior adhesion under high temperature-high humidity conditions and metal corrosion properties.

Claims19

Dependent claims

An optical disk comprising an adhesive comprising, prior to cure:

A) 0.1-5 wt %, relative to the total weight of the adhesive, of (meth)acryloyl phosphate;
B) an organosilyl-containing mercapto compound;
C) a urethane (meth)acrylate oligomer;
D) a (meth)acrylate compound;
and
E) a photoinitiator.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/160,546Filed 25 Sep 1998 · continuation in part

Priority

JP 9-04483913 Feb 1997

Granted

27 Aug 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

G11B 7/256
Of layers other than recording layers: of layers improving adhesion between layers
C08G 18/672
Unsaturated compounds having only one group containing active hydrogen: esters of acrylic or alkyl acrylic acid having only one group containing…
C08G 18/6785
Containing heteroatoms other than oxygen and the nitrogen of primary or secondary amino groups: containing phosphorus
C09J 175/16
Polyurethanes having carbon-to-carbon unsaturated bonds: having terminal carbon-to-carbon unsaturated bonds

Photocurable adhesive for optical disk

Life of this patent

Photocurable adhesive for optical disk

Life of this patent

Abstract

Claims19