Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-05-14
1997-04-22
Smith, Jeffrey T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524272, 524395, C08L 3102
Patent
active
056230117
ABSTRACT:
A tackified pressure-sensitive adhesive having good convertibility and improved adhesive performance even at coat weights lower than conventional systems is provided. The pressure-sensitive adhesive comprises (a) an emulsion polymer formed from a monomer mix comprising 35 to 60% by weight alkyl acrylates, 15 to 35% by weight vinyl esters, 15 to 35% by weight diesters of dicarboxylic acids, and up to about 5% by weight unsaturated carboxylic acids, and (b) a tackifier having an acid number of from about 30 to about 60 and a ring and ball softening point of from about 50.degree. to about 70.degree. C. In one embodiment, the tackifier has a hydrocarbon resin component and a rosin-based resin component, with the preferred tackifier comprising an aromatic modified aliphatic resin containing wood rosin. A preferred adhesive comprises 8 to 12 parts by weight tackifier per 100 parts by weight polymer.
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Avery Dennison Corporation
Smith Jeffrey T.
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