Ultra-violet light curable compositions for abrasion resistant articles
AssigneeMinnesota Mining and Manufacturing Company
InventorRamon F. Hegel
Life of this patent
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Abstract
Inherently highly abrasion-resistant cast articles are prepared by polymerizing a composition comprising (I) as a first component from 0 to 100 parts of urethane polyacrylic ester and (II) as a second component, correspondingly from 100 to 0 parts of a composition containing (A) 30 to 60% by weight of a polyacrylic ester having 4 to 10 acryloyloxy groups, (B) 20 to 70% by weight of a polymerization shrinkage modifier, and (C) 0 to 30% of a diluent monomer. A source of free-radicals may be added to the composition.
Claims16
An article having an inherent abrasion resistance to 000 steel wool of at least 140 kPa comprising a polymerization product of
- (a) from 45 to 60 percent by weight of a polyacrylic ester;
- and
- (b) from 20 to 55 percent by weight of a polymerization shrinkage modifier comprising a polymerizable carbamic compound having at least two groups selected from ##STR10## and at least two acrylic groups per 168 to 2000 of molecular weight and a molecular weight of 168 to 5000 which is an acryloyloxyalkyisocyanurate of the formula ##STR11## in which:
- R.sup.7 is polyvalent aliphatic group selected from R.sup.6 and ##STR12## in which R.sup.6 is an alkylene group having 1 to 6 carbon atoms or a 5- or 6-membered cycloalkylene group having 5 to 10 carbon atoms and R.sup.11 has a valence of g+1 and is a polyvalent aliphatic group having 4 to 10 carbon atoms and, optionally, one caternary oxygen atom;
- g is an integer of 1 to 3;
- and
- (c) from 0 to 30 percent by weight of a diluent monomer;
- and
- (d) a source of free radicals.
Dependencies are inferred from the claim text.