Polyfunctional urethane (meth)acrylate and curable resin composition thereof

Patent metadata

Field	Value
Publication number	US-9969839-B2
Application number	US-201415037137-A
Country	US
Kind code	B2
Filing date	Nov 18, 2014
Priority date	Nov 22, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

In a resin film configured to have a cured product layer formed from a curable resin composition on the surface of a substrate, the present invention aims to ensure not only the processability and other properties of the resin, but also the performance required for recent high-hardness coating films. The above problem was solved by a curable resin composition comprising the intended polyfunctional urethane (meth)acrylate oligomer, which is capable of forming a cured product layer when applied to and cured on a resin substrate.

First claim

The invention claimed is:

1. A polyfunctional urethane (meth)acrylate oligomer represented by formula 1:
XCH 2 —(C(CH 2 X) 2 ) n -CH 2 —O(CO)NH-A1-NH(CO)—O[-A2-O—(CO)NH-A3-NH(CO)] l -O—CH 2 —(C(CH 2 X 2 ) m -CH 2 X  (Formula 1)

in which X represents a (meth)acryloyloxy group, A1 and A3 each represent the deisocyanated residue of a cycloaliphatic diisocyanate, provided that at least one of them is the deisocyanated residue of norbornane diisocyanate, A2 represents the dehydroxylated residue of metaxylylene glycol, and n, m and l are each a natural number, and
wherein 1 is from 3 to less than 50, n and m are each 3 or less.

2. The polyfunctional urethane (meth)acrylate oligomer according to claim 1 , which has a polystyrene-converted number average molecular weight of 900 to 30,000.

3. A curable resin composition comprising 40% by mass or more of the polyfunctional urethane (meth)acrylate oligomer according to claim 1 .

4. A curable resin composition comprising 1 to 10 parts by mass of a photopolymerization initiator relative to 100 parts by mass of the curable resin composition according to claim 3 .

5. A cured product obtained by irradiating the curable resin composition according to claim 3 with active energy rays.

6. The cured product according to claim 5 , wherein the active energy rays are ultraviolet rays.

7. A resin molded article obtainable obtained by applying the curable resin composition according to claim 3 onto a resin substrate at a thickness of 5 to 200 μm and irradiating active energy rays to form a cured product on the substrate surface.

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• KAKEYA Humiaki
• Matsumoto Takahiro
• Murai Katsuyuki
• Moroiwa Tetsuji
• Maeda Yasuhiro

Classifications

• C08F290/06

  Polymers provided for in subclass C08G · CPC title

• C09D175/16

  having terminal carbon-to-carbon unsaturated bonds · CPC title

• C08G18/673 Primary

  containing two or more acrylate or alkylacrylate ester groups · CPC title

• C08G18/758

  containing two or more cycloaliphatic rings · CPC title

• C08G18/3215

  containing aromatic groups or benzoquinone groups · CPC title