Other

Hercules Corporation

Solutia Incorporated

Allnex Belgium S.a.

Arkema France

Cytec Surface Specialties, S.a.

Leo Ternorutsky

Augustin T Chen

Ming Zhao

Hui C Liu

Jong-Shing Guo

Victor Xinya Lu

Patrice Mariucci

Nathan K Ramsey

Victor Xynia Lu

Sandipan Dutta

Susanne Marie Hoff

Lars Kilian

Kang I Lee

Augustin Chen

Lee Kang

The present disclosure is directed to an ultra-high solids emulsion comprising a plurality of multiphase polymer particles, in which the multiphase particles comprises an acrylic-based copolymer derived from monomers comprising an alkyl methacrylate; an alkyl acrylate; a hydroxyalkyl acrylate; at least one or more acids; a vinyl aromatic compound; and a vinyl ester or vinyl lactam, a copolymerizable surfactant, at least one or more alkylphenol ethoxylate (APE) free nonionic surfactants, and at least one or more APE free anionic surfactants in aqueous medium in the presence of an initiator and a buffer. Additionally, methods for preparing such ultra-high solids emulsion and applications of such emulsion in coatings and adhesives are disclosed.

Ultra-high solids emulsion and application

The present invention relates to urethane(meth)acrylate resins obtained from the reaction, in a first step, of at least one polyisocyanate (I) with at least one compound (II) containing at least two reactive groups capable to react with isocyanate groups and at least one (meth)acrylate (III) containing essentially one reactive group capable to react with isocyanate groups, and, in a subsequent step, reacting the product obtained from the first step with at least one polyisocyanate (IV) different from the poly-isocyanate (I) used in the first step, and their use for making radiation cured pressure sensitive adhesives.

Radiation curable adhesive

A removable, plasticizer resistant pressure sensitive composition that is particularly useful for PSA applications on plasticizer containing vinyl films is provided. The pressure sensitive adhesive comprises: (a) at least one hydrophobic monomer; (b) about 0.2 to about 10 wt. % of at least one hydrophilic monomer; (c) about 1 to about 40 wt. % of one partially hydrophilic monomer (d) an effective amount of a crosslinker selected from diallyl maleate or a compound represented by the formula:wherein R is selected from hydrogen, methyl, or ethyl, and R' is selected from vinyl, allyl, or methallyl; wherein the pressure sensitive adhesive does not contain a plasticizer.

Removable pressure sensitive adhesives with plasticizer resistance properties

A plasticized polyvinylchloride (PVC) substrate coated with a plasticizer-resistant pressure-sensitive adhesive comprising a plasticized PVC substrate on which is deposited an adhesive acrylic PSA polymerized in the presence of a chain transfer agent, comprising about 50 to about 99.8% C.sub.1 -C.sub.12 alkyl acrylate monomer, 0 to about 40% vinyl unsaturated monomer, 0.1 to about 10% carboxylic acid functionalized monomer, 0 to about 10% hydroxyl functionalized monomer and about 0.1 to about 10% internal crosslinking monomer wherein the PSA has a glass transition temperature, T.sub.g, of less than -10.degree. C. and greater than about -45.degree. C. and wherein said substrate retains at least 40% peel adhesion and 50% shear strength after heat aging.

Plasticizer resistant emulsion acrylic pressure sensitive adhesive

Growing community of inventors

East Longmeadow, MA, United States of America

Leo Ternorutsky