Resin system for intumescent coating with enhanced metal adhesion

Abstract

The invention relates to an intumescent coating with improved metal adhesion.

1 . Resin system for an intumescent coating comprising at least one ethylenically unsaturated monomer component, characterized in that there is at least one polymeric component comprising an acid (meth)acrylate or copolymerizable polyfunctionalized carboxylic acids present. 
   
   
       2 . Resin system for an intumescent coating according to  claim 1 , characterized in that the acid (meth)acrylate is selected from the group of dicarboxylic acids. 
   
   
       3 . Resin system for an intumescent coating according to  claim 2 , characterized in that the acid (meth)acrylate is selected from the group of beta-CEA. 
   
   
       4 . Resin system for an intumescent coating according to  claim 1 , characterized in that the copolymerizable polyfunctionalized carboxylic acids are selected from the group of itaconic acids, fumaric acids or maleic acids. 
   
   
       5 . Resin system for an intumescent coating according to  claim 1 , characterized in that one polymeric component is selected from the group of thermoplastic resins. 
   
   
       6 . Resin system for an intumescent coating according to  claim 5 , characterized in that one polymeric component is selected from the group of homopolymers, copolymers and/or terpolymers of a (meth)acrylic resin. 
   
   
       7 . Resin system for an intumescent coating according to  claim 1 , characterized in that one polymeric component comprises a (meth)acrylate copolymer. 
   
   
       8 . Resin system for an intumescent coating according to  claim 1 , characterized in that one polymeric component comprises one methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth) acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate and/or 2-ethylhexyl (meth)acrylate. 
   
   
       9 . Resin system for an intumescent coating according to  claim 1 , characterized in that one polymeric component comprises a reaction product of one or more dienes with at least one of styrene, vinyltoluene, vinyl chloride, vinyl acetate, vinylidene chloride and/or vinyl ester. 
   
   
       10 . Resin system for an intumescent coating according to  claim 1 , characterized in that one ethylenically unsaturated monomer component comprises one methacrylate or acrylate functionality. 
   
   
       11 . Resin system for an intumescent coating according to  claim 9 , characterized in that one ethylenically unsaturated monomer component comprises methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate, 2 hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate and/or 2-ethylhexyl (meth)acrylate. 
   
   
       12 . Process for curing an intumescent coating comprising a resin system according to  claim 1 , characterized in that at least one ethylenically unsaturated monomer component and at least one polymeric component comprising an acid (meth)acrylate or copolymerizable, polyfunctionalized carboxylic acids and the typical intumescent auxiliaries and additives are polymerized by means of free radical polymerization. 
   
   
       13 . Process for curing an intumescent coating according to  claim 11 , characterized in that auxiliaries and additives used are initiators, preferably organic peroxides. 
   
   
       14 . Process for curing an intumescent coating according to  claim 12 , characterized in that initiators used are dialkyl peroxides, keto peroxides, peroxy esters, diacyl peroxides, hydroperoxides and/or peroxy ketals. 
   
   
       15 . Use of the intumescent coating according to  claim 1  for coating metal surfaces and wood surfaces.