UV-curable compositions
View Patent ↗The present invention relates to UV-curable compositions, the process for preparing the compositions and to the use of the curable compositions. The compositions contain: a) at least one oxetane compound; b) at least one polyfunctional cycloaliphatic epoxy compound; c) at least one multifunctional hydroxy compound; and d) at least one curing agent.
1. A curable composition consisting essentially of:
a) at least one oxetane compound of the formula
wherein R and R′ independently of one another represent aliphatic, cycloaliphatic or araliphatic groups and n represents an integer from one to four;
b) at least one polyfunctional cycloaliphatic epoxy compound containing a group of the formula
wherein R is a straight chain C 2 –C 6 alkylene group;
c) at least one multifunctional hydroxy compound
Q(OH) n (III),
in which Q represents an aliphatic, cycloaliphatic or araliphatic group and n an integer from 2 up to 128;
d) at least one curing agent; and
e) at least one acrylate or methacrylate compound.
2. A curable composition consisting essentially of:
a) at least one oxetane compound selected from the group consisting of 3,3-[1,4-phenylene-bis(methyleneoxymethylene)]-bis(3-ethyloxetane), 3-methyl-3-oxethanemethanol and 3-ethyl-3 -oxethanemethanol;
b) at least one polyfunctional cycloaliphatic epoxy compound selected from the group consisting of 7-oxabicyclo[4.1.0]hept-3-ylmethyl ester-7-oxabicyclo[4.1.0]heptane-3-carboxylic acid, 2,2′-oxy-bis(6-oxabicyclo[3.1.0]hexane), bis(7-oxabicyclo[4.1.0]hept-3 -yl)methyl ester hexanedioic acid, 3,3′-(dioxane-2,5-diyl)-bis(7-oxabicyclo[4.1.0]heptane) and 2,2-bis(7-oxabicyclo[4.1.0]hept-3-ylcarbonyloxy)-methyl]-1,3-propanediyl ester-7-oxabicyclo[4.1.0]heptane-3-carboxylic acid;
c) a multifunctional hydroxy compound selected from the group consisting of pentaerythritol ethoxylate, polyethylene glycol, polytetrahydrofuran, polycaprolactone diol or triol, tripropylene glycol, glycerol propoxylate and dendtric polyols;
d) at least one curing agent; and
e) at least one acrylate or methacrylate compound.
3. A curable composition consisting essentially of:
a) at least one oxetane compound;
b) at least one polyfunctional cycloaliphatic epoxy selected from the group consisting of 7-oxabicyclo[4.1.0]hept-3-ylmethyl ester-7-oxabicyclo[4.1.0]heptane-3-carboxylic acid and bis(7-oxabicyclo[4.1.0]hept-3-yl)-methyl ester hexanedioic acid;
c) a multifunctional hydroxy compound selected from the group consisting of pentaerythritol ethoxylate, polyethylene glycol, polytetrahydrofuran, polycaprolactone diol or triol, tripropylene glycol, glycerol propoxylate and dendtric polyols;
d) at least one curing agent; and
e) at least one acrylate or methacrylate compound.