Mono and bis(meth)-acrylates, and uses thereof
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorWolfgang Ritter
Life of this patent
Estimating the term…
Abstract
(Meth)-acrylate compounds having one or two terminal (meth)-acrylic acid groups on an oligomer chain which have low volatility and are liquid to solid at room temperature, wherein the oligomer chain is mainly in the form of a polyester oligomer formed from one or more hydroxycarboxylic acids. The preferred (meth)-acrylate compounds are based on polyester-oligomers with a mean molecular weight in the range of about 200 to 600. The invention also relates to the use of these new reactive (meth)-acrylate compounds in construction adhesives.
Claims22
A two component reactive adhesive comprising
- (a) an adhesive component containing two terminal (meth)-acrylyl groups on a polyester-oligomer chain that contains hydroxy-carboxylic acid segments having the structural characteristic ##STR7## wherein R is a straight or branched chain alkylene group, an unsubstituted or alkyl substituted cycloalkylene group, or an unsubstituted or alkyl substituted phenylene group and n is an integer chosen so that the mean molecular weight of the polyester-oligomer chain is in the range of from about 200 to about 600;
- and
- (b) a hardener component, maintained separately from said adhesive component, which contains an initiator to initiate free radical polymerization.
A two component reactive adhesive comprising
- (a) an adhesive component containing two terminal (meth)-acrylyl groups and an internal structure containing hydroxycarboxylic acid segments and at least one moiety derived from the following:
- a difunctional alcohol, a dicarboxylic acid, and a reactive derivative of a dicarboxylic acid, in which such moieties do not contain more than 25 carbon atoms, wherein the adhesive component is prepared by the steps of
- (i) cocondensing at least one hydroxycarboxylic acid of the formula ##STR8## wherein R is a straight or branched chain alkylene group, an unsubstituted or alkyl substituted cycloalkylene group, or an unsubstituted or alkyl substituted phenylene group, with a coreactant which is one or more of a difunctional alcohol, a dicarboxylic acid, and a reactive derivative of a dicarboxylic acid, wherein such coreactant does not contain more than 25 carbon atoms, to form an intermediate product containing either two terminal hydroxy groups, two terminal carboxyl groups, or one terminal hydroxy group and one terminal carboxyl group;
- and
- (ii) reacting any terminal hydroxy groups on the intermediate product with (meth)-acrylic acid or an ester thereof, and reacting any terminal carboxyl groups on the intermediate product with the glycidyl ester of (meth)-acrylic acid;
- and
- (b) a hardener component, maintained separately from said adhesive component, which contains an initiator to initiate free radical polymerization.
Dependencies are inferred from the claim text.