Arkema France

Jon Scholte

Jeffrey A Klang

Michael A Bailey

Mahendra Christopher Orilall

Zackariah J Weinert

(Meth)acrylate-functionalized oligomers having a) an oligomeric backbone comprised of first segments and second segments and b) (meth)acrylate-functionalized end groups are provided. Such oligomers are useful as components of curable compositions. The first segments, second segments and (meth)acrylate-functionalized end groups are linked together by linking moieties derived from a polyisocyanate. The first segments are residues of a first segment precursor containing a plurality of repeating units and a plurality of isocyanate-reactive functional groups and having a number average molecular weight of at least 250 daltons. The second segments are residues of a second segment precursor, different from the first segment precursor, containing a plurality of repeating units and a plurality of isocyanate-reactive functional groups and having a number average molecular weight of at least 250 daltons. The first segment and the second segment exhibit a Hansen Solubility Parameter Distance Relative Energy Difference of at least about 4 and not more than about 9.

(meth)acrylate-functionalized oligomers and methods of preparing and using such oligomers

Foamed products are produced using multi-component systems which are advantageously free of isocyanate. The components of the systems are combined, with the resulting mixture then undergoing curing and foaming to provide a foamed product, wherein the characteristics of the foamed product may be varied by selecting particular reactants to be present in the multi-component system. The systems employ at least one (meth)acrylate compound having two or more (meth)acrylate functional groups per molecule, at least one thiol compound having two or more thiol functional groups per molecule, at least one free radical initiator, at least one blowing agent, at least one surfactant, and optionally at least one promoter for the free radical initiator.

Multi-component systems for preparing foamed products

A curable composition provides, upon curing, an adhesive made from energy-curable compounds having one set of adhesive properties (i.e., peel, tack and shear) after curing and a second set of adhesive properties after being subjected to some external stimuli, such as heat, light, chemicals or mechanical stresses. The curable composition comprises at least one urethane (meth)acrylate oligomer having a structure comprising: a1) at least one polyol backbone segment having at least one reacted end; a2) at least one reacted polyisocyanate forming a urethane linkage at the at least one reacted end of each of the at least one polyol backbone segment and a3) at least one blocking end group reacted with the at least one reacted polyisocyanate to form a reversible bond and bearing a (meth)acrylate group and a chain terminator or extender.

Curable compositions for use as adhesives having properties capable of being altered based on external stimuli and methods of making and using the same

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Exton, PA, United States of America

Jon Scholte