Hexion Specialty Chemicals, Inc.

Resolution Specialty Materials LLC

Momentive Specialty Chemicals Research Belgium

Pavel Holub

Edward Enns McEntire

Jiri Havranek

Olga Bernatova

Edita Moudra

Jiri Horalek

Aqueous dispersions are disclosed, having a minimum film formation temperature no greater than about 50&#xb0; C., that include a multi-stage emulsion polymer made by a process that includes a first polymerization stage, in which a first monomer mixture having a calculated glass transition temperature of at least about 50&#xb0; C. is polymerized via free radical emulsion polymerization to obtain a first-stage emulsion polymer, and a second polymerization stage, in which a second monomer mixture, having a calculated glass transition temperature from about &#x2212;30&#xb0; C. to about 10&#xb0; C., is polymerized via free radical emulsion polymerization, in the presence of the first-stage emulsion polymer. The dispersions are useful in a variety of coating compositions that exhibit improved block resistance.

Aqueous dispersions containing multi-stage emulsion polymers

A modified pressure sensitive adhesive (PSA) is produced by polymerizing at least one ethylenically unsaturated monomer to form a base polymer and reacting the base polymer with a modifying polymer comprising units derived from a n-vinyl lactam to thereby produce a modified polymer. The modified polymer can be used to form modified PSAs having improved adhesion properties over PSAs formed from the unmodified base polymer.

Modified pressure sensitive adhesive

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Sokolov, Czechia

Pavel Holub