ACRYLIC PRESSURE-SENSITIVE ADHESIVE COMPOSITION AND ACRYLIC PRESSURE-SENSITIVE ADHESIVE TAPE

WIPO Patent Application WO/2005/080522

A1

An acrylic pressure-sensitive adhesive composition excellent in adhesion to poorly bondable adherends and to surfaces which have undergone a treatment for imparting water repellency or unsusceptibility to fouling, and in adhesion to rough surfaces. It withstands long-term use and has excellent cohesive force. The acrylic pressure-sensitive adhesive comprises as the main component an acrylic copolymer obtained by photopolymerizing a polymerizable composition comprising a monomer ingredient which comprises an alkyl (meth)acrylate having C_2-14 alkyl and a vinyl monomer having a polar group and in which the acrylic monomer is a major component, an olefin polymer having a polymerizable unsaturated double bond at an end, and a photopolymerization initiator, and has a gel content represented by the following equation (1) of 50 to 80%. Gel content = (B/A) × 100 (1) A: Weight of the acrylic pressure-sensitive adhesive composition B: Weight on dry basis of insolubles in the acrylic pressure-sensitive adhesive composition after 48-hour immersion in 40°C tetrahydrofuran.

TODA TOMOKI (JP)
WATANABE SHIGEKAZU (JP)

PCT/JP2004/003563

September 01, 2005

March 17, 2004

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SEKISUI CHEMICAL CO LTD (JP)
TODA TOMOKI (JP)
WATANABE SHIGEKAZU (JP)

C09J7/00; C09J7/02; C09J11/00; C09J133/00; C09J133/02; C09J133/06; C09J133/08; C09J153/00; C09J157/02; C08L23/00; (IPC1-7): C09J133/08; C09J7/00

JP2004059893A	2004-02-26
JP2004051736A	2004-02-19
JP2001181589A	2001-07-03
JP2001049200A	2001-02-20
JPH08109356A	1996-04-30
JPH0885776A	1996-04-02
JPH07173436A	1995-07-11

Miyazaki, Chikara (5-4 Tanimachi 1-chome, Chuo-k, Osaka-shi Osaka, JP)

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