Abstract A precured pressure-sensitive adhesive tape possessing superior high-temperature properties over a wider range of curing conditions than normally employed. This tape is based on a diene adhesive wherein a major proportion by weight of the elastomers is an elastomeric and thermoplastic block polymer of the structure ABA, wherein A is a thermoplastic polymer block of a vinyl arene with a glass transition temperature above normal room temperature and B is an elastomeric polymer block of isoprene. The elastomers are combined with a tackifier and a curing agent, coated on a backing to form a tape, and then cured in situ to provide a precured adhesive tape having the desired range of high-temperature properties.
A pressure-sensitive adhesive tape according to claim 1, wherein the tackifier is present in the amount of about 40-85 parts per 100 parts by weight of the total elastomers.
Claim 2
Dependent Claim
14 words
A pressure-sensitive adhesive tape according to claim 1, wherein the vinyl arene is styrene.
Claim 3
Dependent Claim
22 words
A pressure-sensitive adhesive tape according to claim 1, wherein the A blocks compose about 10-20 percent by weight of the block polymer.
Claim 4
Dependent Claim
30 words
A pressure-sensitive adhesive tape according to claim 1, wherein the curing agent is present in the amount of about 2-35 parts per 100 parts by weight of the total elastomers.
Claim 5
Dependent Claim
30 words
A pressure-sensitive adhesive tape according to claim 5, wherein the curing agent is present in the amount of about 7-20 parts per 100 parts by weight of the total elastomers.
Claim 6
Dependent Claim
24 words
A pressure-sensitive adhesive tape according to claim 1, wherein the total elastomers in said adhesive consist essentially of said elastomeric and thermoplastic block polymer.