Henkel Corporation

Loctite Corporation

Other

Susanne D Morrill

John Gregory Woods

Anthony Francis Jacobine

Brendan J Kneafsey

Ciaran B McArdle

Jianzhao Wang

Rick Danheiser

The present invention relates to a process for hydroxyalkylating terminal carboxylic acid groups. More specifically, this invention provides a process for preparing hydroxyl-functionalized materials, such as butadiene nitrile polymers, from carboxylic acid-functionalized materials, such as butadiene nitrile polymers, using a carbocyclic carbonate, such as ethylene carbonate, or a carbocyclic sulfite, such as ethylene sulfite.

Process for hydroxyalkylating carboxylic acid-functionalized materials

Adhesive compositions are disclosed which cure rapidly and completely on confinement between passive substrates, such as magnesium alloys, that are deficient in transition metals and transition metal ions. The compositions include one or more acrylate resins, one or more peroxy free radical initiators, one or more onium salts, and an accelerator such as acetylphenyl hydrazine desirably in an amount of about 1.0% or less by weight of the composition. These compositions provide exceptional bonding to such substrates without the need for a transition metal primer. Methods of making and using such compositions are also disclosed.

Adhesive compositions for bonding passive substrates

Adhesive compositions are disclosed which include acrylates, their polymers, and free radical initiators. The compositions include a multi-functional alpha-alkoxyalkyl (meth)acrylate compound and a free radical initiator. The multi-functional alpha-alkoxyalkyl (meth)acrylate compound is the reaction product of: (a) a (meth)acrylic acid or a (meth)acrylate ester having a free carboxylic acid group; and (b) a compound including two or more 1-alkenyl ether groups and free of acetal and ketal groups, or a compound free of acetal and ketal groups and including one or more 1-alkenyl ether groups and a (meth)acrylate group. The compositions are easier and less expensive to prepare than conventional acrylate compositions and degrade when contacted with an acid medium or when heated. The compositions are useful in a wide range of applications and are compatible with conventional adhesive additives.

Multi-functional alpha-alkoxyalkyl acrylate and methacrylate ester compositions and reworkable polymers formed therefrom

The present invention discloses reworkable epoxy compositions suitable for encapsulation of and underfill for electronic components comprising (a) a curable epoxy component which is the reaction product of an epoxidized 1-alkenyl ether or 1-cycloalkenyl ether and a polycarboxylic acid, the reaction product being substantially free of unreacted acid or acid impurities; and (b) a curing agent for the epoxy component, wherein the reaction products of the epoxy composition are reworkable. The cured epoxy compositions of this invention contain thermally labile weak &#x3b1;-alkoxy ester linkages which provide for the reworkable aspect of the invention.

Reworkable epoxidized 1-(cyclo) alkenyl ether/polycarboxylic acid product

The present invention discloses reworkable epoxy compositions suitable for encapsulation of and underfill for electronic components including (a) the epoxidized reaction product of a multifunctional 1-alkenyl ether or 1-cycloalkenyl ether and an alkenyl carboxylic acid, the epoxidized reaction product having two or more thermally labile alpha-alkoxy ester linkages; and (b) a curing agent for the epoxy component. The epoxy composition, when cured, provides a composition which is thermally reworkable, the weak &#x3b1;-alkoxy ester linkages providing for the reworkable aspect of the invention.

Thermally reworkable epoxy resins and compositions based thereon

A toughened cyanoacrylate adhesive composition including a cyanoacrylate monomer and an elastomeric copolymer soluble in the monomer, the copolymer being the reaction product of an olefin C and a (meth)acrylate ester. The invention further discloses novel elastomeric copolymers which do not contain additives or functional groups which can interfere with the cure rate or stability of the adhesive composition in which they are included. Benefits of the copolymers include improved toughness of the cured adhesive composition as measured by Dynamic Mechanical Analysis.

Toughened cyanoacrylate adhesives containing alkene-acrylate copolymers and method for production

Acetal and hemiacetal ester linked propylene carbonate functional (meth)acrylic esters and method of making same

The present invention is directed to radical-curable adhesive compositions which include a (meth)acrylate component; a thermal resistance-conferring component; and a radical cure-inducing composition. Reaction products of the compositions of this invention exhibit superior resistance of thermal degradation.

Radical-curable adhesive compositions, reaction products of which demonstrate superior resistance to thermal degradation

Curable compositions include at least one monomer compound having both (meth)acrylic ester functionality and an allylic phenyl ether functional group on the same molecule, the allylic phenyl ether functional group having at least one unsubstituted position on the phenyl ring which is ortho or para to the allylic ether group, and a free radical catalyst system. The composition may also includes a latent thermally activated acid generator. Claisen Rearrangement of radically polymerized polymers produced from the compositions may be induced at temperatures of about 100&deg; C. or more to give crosslinked products of improved thermal resistance. Novel monomers which may be used in such compositions are characterized by formulas I and II:

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West Hartford, CT, United States of America

Susanne D Morrill