Claims
- 1. Solvent-free, fine white powders of an alternating terpolymer of maleic anhydride, a C.sub.1 -C.sub.4 alkyl vinyl ether and isobutylene having molecular structure (A-B).sub.n, where A is maleic anhydride and B is alkyl vinyl ether or isobutylene, and having a mole ratio of maleic anhydride to alkyl vinyl ether to isobutylene of 0.50:0.45-0.25:0.05-0.25, which has a weight average molecular weight of at least about 1,500,000, as measured by GPC in water (pH 9), and a specific viscosity of .gtoreq.6, as measured on 1% solutions in DMF.
- 2. A terpolymer according to claim 1 having about 10-15 mole % isobutylene.
- 3. A solvent-free, high molecular weight denture adhesive comprising the terpolymer of claims 1 or 2 in the form of its mixed salt.
- 4. An adhesive according to claim 3 wherein said mixed salt is the Ca.sup.++ /Na.sup.+ or Ca.sup.++ /Zn.sup.++ mixed salt.
- 5. A terpolymer according to claim 1 wherein said alkyl vinyl ether is methyl vinyl ether.
Parent Case Info
This is a division of application Ser. No. 08/942,830, filed Oct. 2, 1997 pending.
US Referenced Citations (7)
Foreign Referenced Citations (6)
Number |
Date |
Country |
44-20993 |
Sep 1969 |
JPX |
03813386 |
Apr 1991 |
JPX |
3109404 |
May 1991 |
JPX |
0562092 |
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GBX |
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Divisions (1)
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Number |
Date |
Country |
Parent |
942830 |
Oct 1997 |
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