Elastomer-based pressure sensitive adhesive composition
Abstract
Abstract A PRESSURE SENSITIVE ADHENSIVE PRODUCT IS PRODUCED BY CASTING ON A SUBSTRATE WEB, SUCH AS PAPER, PLASTIC FILM, OR METAL FOIL, A LAYER OF AN ADMIXTURE CONSISTING ESSENTIALLY OF: (A) A DIENE POLYMER HAVING AT LEAST 1.6 TERMINAL FUNCTIONAL GROUPS AND AN EQUIVALENT WEIGHT OF 500 OR MORE, (B) AN ORGANIC COREACTANT HAVING ABOUT 2 OR MORE COREACTIVE GROUPS, AND (C) AT LEAST 75 PARTS, PER 100 PARTS OF THE DIENE POLYMER AND THE ORGANIC COREACTANT, OF A TACKIFYING RESIN OR MIXTURE OF TACKIFYING RESINS HAVING A BALL AND RING SOFTENING POINT OF 60* TO 140* C. THAT HAS BEEN PREDISSOLVED IN THE DIENE POLYMER, AND COREACTING THE DIENE POLYMER AND THE ORGANIC COREACTANT IN SITUON THE SUBSTRATE WEB TO GIVE A PRESSURE SENSITIVE ADHESIVE PRODUCT. THE DIENE POLYMER AND THE ORGANIC COREACTANT, PLUS ANY OTHER INGREDIENTS, REACTIVE WITH THE DIENE POLYMER AND THE ORGANIC COREACTANT THAT ARE USED, ARE CHOSEN SO THAT THE PRESSURE SENSITIVE ADHESIVE POLYMER FORMED ON THE SUBSTRATE WEB HAS THE CHARACTER OF AN ELASTOMER.
Inventors
- 👤 D Kest
Bibliographic Details
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