Patent ID: 6613444
Filing Date: 2003-09-02
Classification: A47K,C08J,Y10T

Abstract:
A backing-lined sanitary article comprising an acrylic glass molding having a finished side and an opposite reverse side, which is reinforced on its reverse side with 1.5 to 10 mm thick polymer material that is free from glass fibers and asbestos and is bonded to the acrylic glass molding without additional adhesion promoters, wherein the reinforcing material comprises a first and a second layer, the first layer obtained by curing a polymerizable, cold-curing, reactive first (meth)acrylate system that is sprayed onto the reverse side of the acrylic glass molding and which comprisesA) a) a (meth)acrylate component, in an amount of 50-100 wt. %, which consists of a1) methyl (meth)acrylate, in an amount of 0-100 wt. %, a2) C2-C4 (meth)acrylate, in an amount of 0-100 wt. %; a3)&gE;C5 (meth)acrylate, in an amount of 10-50 wt. %, and a4) polyfunctional (meth)acrylates selected from the group consisting of di-, tri-, and tetra-functional (meth)acrylates, in an amount of 0-50 wt. % b) a comonomer component, in an amount of 0-50 wt. %, which consists of b1) vinylaromatics, in an amount of 0-30 wt. %, and b2) vinyl esters, in an amount of 0-30 wt. %, wherein all weight percents are based on the total weight of the monomer component A), B) a (pre)polymer, which is soluble or swellable in the monomer component A), in an amount of 0.05-5 parts by weight per 1 part by weight of A), C) a redox system, which is to be kept separate from the constituents of the system to be polymerized until the polymerization, and which comprises an accelerator, and a periodic catalyst or initiator, in an amount sufficient for cold-curing of component A), D) customary additives, E) fine fillers, which are inert under the conditions of depolymerization of acrylic polymers, including heat treatment at a temperature greater than 200Â° F., and which have a particle diameter of &lE;100 &mgr;m, in an amount of 0-75 wt. %, based on the sum of A)-E), and F) hollow microparticles filled with inert gas, in an amount of 0.1-50 wt. %, based on the sum of A)-F), the second layer obtained by curing a polymerizable, cold-curing, reactive second (meth)acrylate system that is sprayed onto the first layer and which comprisesA) a) a (meth)acrylate component, in an amount of 50-100 wt. %, which consists of a1) methyl (meth)acrylate, in an amount of 0-100 wt. %, a2) C2-C4 (meth)acrylate, in an amount of 0-100 wt. %, a3)&gE;C5 (meth)acrylate, in an amount of 0-<10 wt. %, and a4) polyfunctional (meth)acrylates selected from the group consisting of di-, tri-, and tetra functional (meth)acrylates, in an amount of 0-50 wt. %, b) a comonomer component, in an amount of 0-50 wt. %, which consists of b1) vinylaromatics, in an amount of 0-30 wt. %, and b2) vinyl esters, in an amount of 0-30 wt. %, wherein all weight percents are based on the total weight of the monomer component A), B) a (pre)polymer, which is soluble or swellable in the monomer component A), in an amount of 0.05-5 parts by weight per 1 part by weight of A), C) a redox system, which is to be kept separate from the constituents of the system to be polymerized until the polymerization, and which comprises an accelerator, and a periodic catalyst or initiator, in an amount sufficient for cold-curing of component A), D) customary additives, E) fine fillers, which are inert under the conditions of depolymerization of acrylic polymers, including heat treatment at a temperature greater than 200Â° F., and which have a particle diameter of &gE;100 &mgr;m, in an amount of 0-75 wt. %, based on the sum of A)-E), and F) hollow microparticles filled with inert gas, in an amount of 0-50 wt. %, based in the sum of A)-F).