Dentin bonding system
US5348988A · kind A · utility
34Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Oct 29, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/40
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel unsaturated carboxy esters for use in dentistry as bonding agents are produced by a reaction of unsaturated alcohols with cyclic acid dianhydrides. The dianhydrides which can be used in the invention are in general symmetrical compounds having an aromatic nucleus substituted with four carboxylic acid groups from which two moles of water have been removed to form two cyclic anhydride groupings. The unsaturated alcohols used for making the unsaturated carboxy esters have the formula ##STR1## wherein R is H or CH.sub.3, R.sub.1 is H, CH.sub.3, or .dbd.CH.sub.2, PA1 n is an integer from 1 to 4 inclusive, and PA1 x is 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.