Compositions including alpha-alumina particles and methods of their use
Assignee3M Innovative Properties Company
InventorsThomas P. Klun, Chunjie Zhang, Richard J. Pokorny, Benjamin R. Coonce, Benjamin G. Sonnek, Gregg A. Ambur, Jung-Sheng Wu
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Abstract
A curable composition comprises: a) 91 to 98.2 weight percent of: (i) at least one polymerizable compound containing at least one carbamylene group; or (ii) at least one polyurethane precursor system; and b) 0.2 to 9 weight percent of alpha alumina particles having a particle size distribution with a Dv50 of from 0.1 to 1 micron, wherein the weight percentages of a) and b) are based upon the total amount of a) and b). Cured compositions and their use in thermoforming are also disclosed.
Claims10
A curable composition comprising components:
- a) 97 to 99.8 weight percent of:
- at least one polymerizable compound containing at least one carbamylene group;
- and
- b) 0.2 to 3 weight percent of alpha alumina particles having a particle size distribution with a Dv50 of from 0.1 to 1 micron, wherein the weight percentages of components a) and b) are based upon the total amount of components a) and b);
- and
- c) free-radical initiator,
- wherein the at least one polymerizable compound comprises at least one urethane (meth)acrylate monomer, at least one urethane (meth)acrylate oligomer, at least one (meth)acrylated polyurethane, or a combination thereof.
A polymer composition comprising components:
- a) 97 to 99.8 weight percent of at least one polymer comprising a plurality of carbamylene groups, wherein the at least one polymer is covalently crosslinked;
- and
- b) 0.2 to 3 weight percent of alpha alumina particles having a particle size distribution with a Dv50 of from 0.1 to 1 micron, wherein the weight percentages of components a) and b) are based upon the total amount of components a) and b).
Dependencies are inferred from the claim text.