US Patent:
20050261441, Nov 24, 2005
Inventors:
Maneesh Bahadur - Midland MI, US
Peter Lo - Midland MI, US
Patrick Vaughn - Lake Orion MI, US
International Classification:
C08F110/00
Abstract:
A polyisobutylene composition, comprising (A) a polyisobutylene polymer selected from (i) a glycidoxy-functional polyisobutylene polymer containing an average of at least two glycidoxy groups per molecule having the formula —O—CHCH(O)CHand (ii) an alkenyl ether-functional polyisobutylene polymer containing an average of at least two alkenyl ether groups per molecule having the formula —SiR[OROC(R)═CH(R)], wherein each Ris independently Cto Chydrocarbyl, Cto Chalogen-substituted hydrocarbyl, or Cto Calkoxy, Ris Cto Chydrocarbylene or Cto Chalogen-substituted hydrocarbylene, each Ris independently Cto Chydrocarbyl, Cto Chalogen-substituted hydrocarbyl, or —H, subscript a is an integer having a value of 0, 1, or 2, and at least 50 mol % of the repeat units in the polyisobutylene polymer are isobutylene units having the formula: —CHC(CH)—; (B) an epoxy-functional organosiloxane containing from 0.5 to 20% (w/w) silicon, an average of at least two siloxane linkages per molecule, and an average of at least two epoxy groups per molecule; and (C) a catalytic amount of a cationic photoinitiator. And a cured polyisobutylene product prepared by curing the polyisobutylene composition.