EXTRUDABLE PRESSURE SENSITIVE ADHESIVE COMPOSITION AND METHODS FOR PREPARING THE SAME

摘要

A phase-separated polymeric composition comprising a first phase including polyurethane domains; and a second phase including a butyl rubber matrix.

主权项

1. A method for producing a polymeric composition, the method comprising:
i. charging halogenated butyl rubber to a reaction extruder; ii. charging a first phenolic resin to the reaction extruder, where the first phenolic resin includes functionality for reacting with double bonds located on the butyl rubber; iii. charging a second phenolic resin that is substantially devoid of functionality for reacting with double bonds located on the butyl rubber; iv. charging a metal oxide to the reaction extruder; v. charging a catalyst to promote a reaction between the butyl rubber and the first phenolic resin to the reaction extruder; vi. mixing said halogenated butyl rubber, said first phenolic resin, said metal oxide, and said catalyst to promote the reaction between the butyl rubber and the first phenolic resin to thereby partially crosslinking the rubber and functionalizing the rubber with the first phenolic resin; vii. charging a isocyanate to the reaction extruder; and viii. mixing said partially crosslinked rubber, said phenolic resin, and said catalyst to thereby form a polyurethane dispersed within butyl rubber.