Granted Patent B1

US 6,855,748 · App. 10/088,564 · Granted Feb 15, 2005

Abstract

Claims (33)

1. A curable composition comprising

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

wherein the ratio of the oxetane compound to the polyfunctional cycloaliphatic epoxy compound to the multifunctional hydroxy compound is from 7.5:1.5:1 to 150:10:1.

2. A curable composition according to claim 1 comprising

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; and

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; and

d) at least one curing agent.

3. A curable composition according to claim 1 comprising

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-α-ethanemethanol 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 dendritic polyols; and

d) at least one curing agent.

4. A curable composition according to claim 1 comprising

a) at least one oxetane compound;

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 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 dendritic polyols; and

d) at least one curing agent.

5. A curable composition according to claim 1 , wherein the ratio of the oxetane compound to the polyfunctional cycloaliphatic epoxy compound to the multifunctional hydroxy compound is from 14:2:1 to 91:7:1.

6. A process for preparing a curable composition, which comprises

α) treating a composition comprising

a) at least one oxetane compound;

b) at least one polyfunctional cycloaliphatic epoxy compound; and

c) at least one multifunctional hydroxy compound; with

β) an ultraviolet (UV) curable curing agent

wherein the ratio of the oxetane compound to the polyfunctional cycloaliphatic epoxy compound to the multifunctional hydroxy compound is from 7.5:1.5:1 to 150:10:1.

Assignments (6)