Pressure-sensitive adhesive material
AssigneeKanegafuchi Chemical Industry Co., Ltd.
InventorsToshifumi Hirose, Katsuhiko Isayama
Life of this patent
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Abstract
a tape or sheet form pressure-sensitive adhesive material which comprises a substrate which is obtainable by curing a curable resin composition comprising: (A) an organic elastomeric polymer which is liquid at room temperature and has, in a molecule, at least one silicon-containing group to the silicon atom of which at lease one hydroxyl group or hydrolyzable group is bonded and which is cross linkable through formation of a siloxane bond, (B) a curing catalyst and (C) optionally a tackifier resin and a pressure-sensitive adhesive layer laminated on said substrate, which has good flexibility and increased adhesive force such as adhesive strength under shear and peel strength.
Claims18
A tape or sheet form pressure-sensitive adhesive material which comprises a substrate which is obtained by curing a curable resin composition comprising:
- (A) an organic elastomeric polymer which is liquid at room temperature and has, in a molecule, at least one silicon-containing group to the silicon atom of which at least one hydroxyl group or hydrolyzable group is bonded and which is cross linkable through formation of a siloxane bond,
- (B) a curing catalyst
- and
- (C) optionally a tackifier resin
- and a pressure-sensitive adhesive layer comprising an acrylic adhesive laminated on said substrate.
A tape or sheet form pressure-sensitive adhesive material which comprises a substrate which is obtained by curing a curable resin composition comprising:
- (A) an organic elastomeric polymer which is liquid at room temperature and has, in a molecule, at least one silicon-containing group to the silicon atom of which at least one hydroxyl group or hydrolyzable group is bonded and which is cross linkable through formation of a siloxane bond, wherein the organic elastomeric polymer (A) comprises, as a backbone chain, a polyether comprising repeating units of the formula:
- --R--O--
- in which R is a divalent polypropylene oxide organic group, and wherein the silicon-containing group is the group of the formula:
- ##STR25## wherein X is a hydroxyl or a hydrolyzable group, provided that when two or more X groups are present, they may be the same or different;
- R.sup.1 is a monovalent hydrocarbon group having 1 to 20 carbon atoms or a triorganosiloxy group of the formula:
- R.sub.3.sup.2 Si--O--
- in which R.sup.2 is a monovalent hydrocarbon group having 1 to 20 carbon atoms, provided that the three R.sup.2 groups may be the same or different and that when two or more R.sup.1 groups are present, they may be the same or different;
- wherein X and R.sup.1 are the same as defined above and "c" is 1, 2 or 3.
- (B) a curing catalyst
- and
- (C) optionally a tackifier resin
- and a pressure-sensitive adhesive layer comprising an acrylic adhesive laminated on said substrate.
Dependencies are inferred from the claim text.