Henkel IP Holding Gmbh

Henkel Ag & Company, Kgaa

Sean M Burdzy

Andrew D Messana

Anthony Francis Jacobine

Joel D Schall

Laxmisha Sridhar

John Gregory Woods

Eric N Silverberg

Bruce Stevens

Disclosed is a simplified process for formation of polyisobutylene functionalized with at least one terminal primary or secondary alcohol. The process comprises subjecting an olefin functional polyisobutylene, butyl rubber, or mixtures thereof to ozonation and reduction thereby forming mono-alcohol and diol functional polyisobutylene. The formed functional polyisobutylenes can serve as precursors for many other functionalized polyisobutylenes including urethane polyisobutylenes, urethane polyisobutylenes capped with (meth)acrylate functions, and (meth)acrylate capped polyisobutylenes.

Synthesis of functionalized polyisobutylenes

Disclosed are photoinitiators that are ultra violet (UV) reactive. The photoinitiators can be polymerized into polymeric backbones for use in UV curable hot melt pressure sensitive adhesives. The preferred polymeric backbones are acrylic-based polymers. The photoinitiators are very UVC sensitive and have excellent hot melt viscosity stability that is many fold higher than existing photoinitiators. The subject photoinitiators feature aryl ketones linked through an ether linkage to a variety of connector sequences that allow for polymerization of the photoinitiators.

Photoinitiators that are polymeric or polymerizable for use in UV curable pressure sensitive adhesives

The present invention relates to anaerobic curable compositions, such as adhesives and sealants, containing blocked acrylic acid compounds. The blocked acrylic acid compounds are labile (meth)acrylic acid compounds having an acetal linkage, which cleaves to release (meth)acrylic acid during anaerobic cure. In this way, the block acrylic acid compounds acts as an adhesion promoter thereby promoting adhesion to various substrates.

Anaerobic curable compositions containing blocked (meth)acrylic acid compounds

Anaerobic curable compositions, such as adhesives and sealants, containing blocked carboxylic acid compounds are provided. The blocked carboxylic acid compounds are labile carboxylic acid compounds having acetal linkages, which cleave to release the underlying carboxylic acid during anaerobic cure.

Anaerobic curable compositions containing blocked (meth)acrylate acid compounds

Anaerobic curable compositions, such as adhesives and sealants, containing blocked dicarboxylic acid compounds are provided. The blocked dicarboxylic acid compounds are labile dicarboxylic acid compounds having two acetal linkages, which cleave to release the underlying dicarboxylic acid during anaerobic cure. In this way, the dicarboxylic acid can participate in the anaerobic cure of the composition when the blocking group is released.

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Hamden, CT, United States of America

Sean M Burdzy