Claims
- 1. A laminating adhesive comprising a adhesive composition which comprises
- (a) an unhydrogenated epoxidized block copolymer which contains from 0.1 to 3.0 Meq epoxy per gram of polymer and has the formula
- (A-B-A.sub.p).sub.n -Y.sub.r -(A.sub.q -B).sub.m
- wherein Y is a coupling agent or coupling monomers, and
- wherein A and B are polymer blocks of isoprene and butadiene, respectively, and
- wherein the A blocks have a higher number of aliphatic double bonds between a tertiary carbon atom and either a primary, secondary, or tertiary carbon atom per unit of block mass than do the B blocks, and
- wherein the A blocks have a molecular weight from about 100 to about 3000 and the B blocks have a molecular weight from about 1000 to about 15,000 , and
- wherein p and q are 0 or 1 and n>0, r is 0 or 1, m.gtoreq.0 and n+m ranges from 1 to 100;
- (b) at least a significant amount of a tackifying resin compatible with the polymer of (a) up to 400 phr.
- 2. The adhesive of claim 1 wherein the polymer contains from 0.5 to 2 Meq of epoxy per gram of polymer.
Parent Case Info
This is a division, of application Ser. No. 08/043,428, filed Apr. 6, 1993, now U.S. Pat. No. 5,393,818.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4237245 |
Halasa et al. |
Dec 1980 |
|
5149895 |
Coolbaugh et al. |
Sep 1992 |
|
5210359 |
Coolbaugh et al. |
May 1993 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
0396780A1 |
Nov 1990 |
EPX |
0441485A2 |
Aug 1991 |
EPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
43428 |
Apr 1993 |
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