3m Innovative Properties Company

Constance J Nelson

Audrey A Sherman

Mieczyslaw H Mazurek

Walter R Romanko

Keizo Yamanaka

Naiyong Jing

Albert I Everaerts

Jayshree Seth

Charles M Leir

Tatsuo Fukushi

William D Coggio

Thomas J Blong

Edward E Parsonage

Timothy M Dietz

Kurt C Melancon

Andrew J Callinan

Daniel R Fronek

Sehyun Nam

Trang D Pham

Douglas S Parker

Patricia R Konsti

The present invention provides polydiorganosiloxane oligourea segmented copolymers. The copolymers contain soft polydiorganosiloxane units, hard segments that are diisocyanate residues, the polydiorganosiloxane units and diisocyanate residues being connected by urea linkages, and terminal groups that are non-reactive, reactive under free radical or moisture cure conditions, or amines. The invention also provides methods of preparing the copolymers.

Polydiorganosiloxane oligourea segmented copolymers and a process for making same

Melt-processable polydiorganosiloxane polyurea segmented copolymer compositions are provided. The compositions comprise alternating soft polydiorganosiloxane units and hard diisocyanate residue units, the diisocyanate residue being the diisocyanate minus the &mdash;NCO groups, the units being connected together by urea linkages which also provide hard units. The compositions are prepared by continuously providing at least one diisocyanate and at least one polydiorganosiloxane diamine to a reactor, mixing the diisocyanate and the polydiorganosiloxane diamine in the reactor under substantially solvent-free conditions, allowing the diisocyanate and polydiorganosiloxane diamine to react to form a polydiorganosiloxane polyurea copolymer, and conveying the copolymer from the reactor.

Polydiorganosiloxane polyurea segmented copolymers and a process for making same

This invention provides a method of bonding substantially non-fluorinated polymeric material to a fluoropolymer utilizing a bonding composition comprising primary or secondary di- or poly-amine and a melt-processable, substantantially non-fluorinated component. Multi-layer articles and composite constructions, including retroreflective sheeting and fuel line hoses, made of a fluoropolymer layer and a substantially non-fluorinated layer are also provided.

Multi-layer compositions comprising a fluoropolymer

A multi-layer article comprising a substrate and a dehydrofluorinated fluoropolymer, wherein the dehydrofluorinated polymer contains substantially no grafted adhesion-promoting groups, and the dehydrofluorinated fluoropolymer contains sufficient carbon-carbon unsaturation to increase the adhesion between the dehydrofluorinated fluoropolymer and the substrate.

Method of improving adhesion between a fluoropolymer and a substrate

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Woodbury, MN, United States of America

Constance J Nelson