Adhesives and laminates
AssigneePhillips Petroleum Company
InventorsKishore Udipi, Henry L. Hsieh
Life of this patent
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Abstract
Adhesive compositions comprising epoxidized rubbery copolymers and rosin-based tackifiers which exhibit superior tack and which are useful in laminating structures exhibiting outstanding peel strength and good water-resistance properties.
Claims18
A plurality of layers having an adhesive composition consisting essentially of (1) at least one epoxidized rubbery copolymer of a conjugated diene and a monovinylarene having a conjugated diene/monovinylarene weight ratio of 45/55 to 95/5 and a weight average molecular weight of about 15,000 to 350,000 and wherein the extent of epoxidation, as defined by the ratio of olefinic double bonds modified by the epoxidation reaction to the number of initial double bonds, ranges from 5 to 80 percent and (2) at least one rosin-based tackifier between adjacent surfaces thereof as a bonding material therefor.
A method for uniting surfaces of elements which comprises:
- (a) applying to at least one of said surfaces an adhesive composition consisting essentially of (1) at least one epoxidized rubbery copolymer of a conjugated diene and a monovinylarene having a conjugated diene/monovinylarene weight ratio of 45/55 to 95/5 and a weight average molecular weight of about 15,000 to 350,000 and wherein the extent of epoxidation, as defined by the ratio of olefinic double bonds modified by the epoxidation reaction to the number of initial double bonds, ranges from 5 to 80 percent and (2) at least one rosin-based tackifier,
- (b) holding said surfaces contiguous to one another with said composition disposed therebetween, and
- (c) allowing said adhesive composition to bond to said surfaces and form a structure having good T-peel strength.
An adhesive composition consisting essentially of (1) at least one epoxidized rubbery copolymer of a conjugated diene and a monovinylarene having a conjugated diene/monovinylarene weight ratio of 45/55 to 95/5 and a weight average molecular weight of about 15,000 to 350,000 and wherein the extent of epoxidation, as defined by the ratio of olefinic double bonds modified by the epoxidation reaction to the number of initial double bonds, ranges from 5 to 80 percent and (2) at least one rosin-based tackifier.
Dependencies are inferred from the claim text.