Inventors:
Daniel L. Holguin - Fullerton CA
H. Paul Barker - Sherman Oaks CA
Ivan S. P. Lee - Arcadia CA
Kenneth S. Lin - San Marino CA
Assignee:
Avery Dennison Corporation - Pasadena CA
International Classification:
C08F22068
US Classification:
526320, 5263285, 526319, 526 74, 526 89, 526210, 526212, 526217, 5263171, 5263183, 5263184, 52631842, 5263292, 428 415
Abstract:
A method for the preparation of gel-free poly 2-hydroxyethyl methacrylate substantially in the absence of a chain transfer agent, comprising introducing monomeric 2-hydroxyethyl methacrylate containing ethylene glycol dimethacrylate impurities in the range of about 0. 05 to 0. 1% by weight into alcohol, polymerizing the 2-hydroxyethyl methacrylate to form a polymerization mixture, and removing the alcohol. Hydrophilic pressure sensitive adhesives are provided by adding polyethylene glycol to the polymerization mixture prior to removing the alcohol. A method for the preparation of an acrylic emulsion ink jet receptive clear coating, comprising forming a alkyl acrylate monomer-containing pre-emulsion feed mixture, introducing an activator into the alkyl acrylate monomer-containing pre-emulsion feed mixture, reacting a water soluble monomer feed in the alkyl acrylate monomer-containing pre-emulsion feed mixture, the water soluble monomer feed comprising 2-hydroxyethyl methacrylate and a cationic monomer to form a clear polymer in the reaction mixture. In another embodiment, the clear polymer in the butyl acrylate-containing pre-emulsion feed mixture is subsequently reacted with a water insoluble monomer feed mixture comprising 2-hydroxyethyl methacrylate, n-vinyl pyrrolidone, butyl acrylate, and methacrylic acid to form a second clear polymer in addition to the clear polymer in the alkyl acrylate monomer containing pre-emulsion feed mixture.