| 摘要 |
<p>Adhesive composition crosslinked by heating, comprises a polyurethane (20-85%) comprising two hydrolysable alkoxysilane type terminal groups (I), a compatible tackifying resin (15-80%) having an average molar mass of 200 Da-5 kDa, where the resin is obtained by: polymerizing terpene hydrocarbons in the presence of Friedel-Crafts catalyst and the reaction with phenols; and polymerizing alpha-methyl styrene and optionally reaction with phenols, and a crosslinking catalyst (0.01-3%). Adhesive composition crosslinked by heating, comprises a polyurethane (20-85%) comprising two hydrolysable alkoxysilane type terminal groups, of formula ((R 5>O) 3-p(R 4>) pSi-R 3>-NH-C(=O)-(OR 2>) n-(O-C(=O)-NH-R 1>-NH-C(=O)-(OR 2>) n) m-O-C(=O)-NH-R 3>-Si(R 4>) p(OR 5>) 3-p) (I), a compatible tackifying resin (15-80%) having an average molar mass of 200 Da-5 kDa, where the resin is obtained by: polymerizing terpene hydrocarbons in the presence of Friedel-Crafts catalyst and the reaction with phenols; and polymerizing alpha-methyl styrene and optionally reaction with phenols, and a crosslinking catalyst (0.01-3%). R 1> : aromatic or aliphatic 1-15C divalent hydrocarbon; R 2> : 1-4C divalent alkylene; R 3> : 1-3C divalent alkylene; R 4>, R 5> : 1-4C alkyl; n : integer such that the average molar mass in polyether block (-(OR 2>) n) is 300 Da-30 kDa; m : integer such that the average molar mass in (I) is 600 Da-60 kDa; and p : 0-2. An independent claim is included for a self-adhesive support obtained by preheating the adhesive composition at a temperature of 50-130[deg] C, coating the heated composition on a support layer and then crosslinking by heating the coated support at a temperature of 50-150[deg] C.</p> |
