Low-molecular weight acrylate resins and a process for their production

Abstract

Abstract A process for the production of a crosslinkable low-molecular weight acrylic resin containing hydroxyl-groups and having a low-molecular consistency factor by the radical bulk copolymerization of (A) 0 to 30 parts by weight of a hydroxyalkyl ester of acrylic acid or methacrylic acid or mixtures thereof; (B) 0 to 60 parts by wt. of styrene or a substituted styrene or methyl methacrylate or mixtures thereof; (C) 10 to 90 parts by weight of an acrylic acid ester or of a methacrylic acid ester with 2 to 12 carbon atoms in the alcohol radical or mixtures thereof; (D) 0 to 30 parts by weight of an α,β-monoolefinically saturated mono- or di-carboxylic acid with 3 to 5 carbon atoms or of a maleic acid semiester or mixtures thereof or reaction products thereof with a monoglycidyl compound, in the presence of 10 to 70 parts by weight of a monoallyl ether of an at least trihydric alcohol, The sum of the parts by weight of all the monomers A - E amounting to 100, Wherein the indicated quantity of monomer E is initially introduced and, at temperatures above 100° C, monomers A to D together with 0.5 to 6% by weight, based on A to D, of an initiator with a half-life period at 100 to 160° C of 0.01 to 100 minutes, are introduced over a period of 1 to 6 hours and polymerized, at least 98% by weight of the monomers A to D and from 36 to 95% by weight of monomer E being converted. Acrylate resins of this type are eminently suitable for the production of readily processible binder mixtures which although low in viscosity, have a very high solids content.

Inventors

• 👤 Frank Wingler
• 👤 Josef Pedain
• 👤 Walter Uerdingen

Bibliographic Details