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US 6,673,958 B2Granted
Multifunctional dentin bonding agent
AssigneeBisco, Inc.
InventorsAmer Tiba, Martin Hamer, Byoung I. Suh
Life of this patent
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Abstract
Novel unsaturated esters for use in dentistry as bonding agents are produced by a stepwise reaction of a cyclic dianhydride with a) unsaturated alcohols, b) unsaturated glycidyl ethers, and c) unsaturated isocyanates. The products used as bonding agents have the formula: wherein R2 is H or CH3.
Claims9
A compound having the formula:
- wherein R2 is H or CH3.
A method of making a compound having the formula
- wherein R2 is H or CH3, the method comprising:
- (a) contacting a cyclic anhydride having the formula:
- with an ethylenically unsaturated alcohol having 3 to 12 carbon atoms having the formula:
- wherein R1 is H, CH3, or ═CH2;
- R2 is H or CH3;
- n is 1, 2, 3, or 4;
- and x is 0 or 1;
- (b) contacting the product of step (a) with an ethylenically unsaturated glycidyl ether having 3 to 12 carbon atoms having the formula:
- (c) contacting the product of step (b) with an ethylenically unsaturated isocyanate having 3 to 12 carbon atoms having the formula:
6 more elements
Dependencies are inferred from the claim text.