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专利名称：Method for preparing pressure-sensitive
adhesive articles
发明人：Joseph J. Wilczynski申请号：US07/531300申请日：19900531公开号：US05049416A公开日：19910917
摘要：There are disclosed normally tacky, pressure-sensitive adhesive compositionscomprising one or more normally tacky polymers having a T. sub.g of about 0° C. or lessand containing (a) at least about 40 weight percent of at least one polymerized
olefinically unsaturated carboxylic acid ester monomer in the polymer backbone and (b)pendant functional groups attached to the backbone and having the formula: ##STR1##wherein R.sub.1 is (i) a covalent bond which directly connects the carbonyl carbon atom ofthe --CHO group to a carbon atom in the backbone of the polymer or (ii) a divalentorganic radical comprising a carbon atom which directly adjoins the carbonyl carbon atomof the -- CHO group, the polymers also being normally tacky when cured. Such polymershave improved cohesive strength (shear holding value) with little or no detriment toadhesive tack or adhesion (peel resistance), and these improvements are realized withoutthe necessity of incorporating crosslinking monomers such as N-methylolamides or othercrosslinking agents. Pressure-sensitive adhesive, water-based emulsions containing suchpolymers and pressure-sensitive adhesive articles comprising a substrate having at least aportion of one surface thereof coated with the adhesive compositions are also disclosed.
申请人：UNION OIL COMPANY OF CALIFORNIA
代理人：Gregory F. Wirzbicki,Michael A. Kondzella
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