초록 ▼

Disclosed herein is a process for preparing highly filled acrylic articles comprising: (a) providing a solution of an acid-functional acrylic polymer-in-monomer solution; (b) mixing into said solution a catalytic amount of polymerization promoter system; (c) blending into said mixture 40 percent to

Disclosed herein is a process for preparing highly filled acrylic articles comprising: (a) providing a solution of an acid-functional acrylic polymer-in-monomer solution; (b) mixing into said solution a catalytic amount of polymerization promoter system; (c) blending into said mixture 40 percent to 80 percent inert particulate filler to form a casting mixture; (d) introducing said casting mixture to a mold; and (e) curing said molded casting mixture; whereby the viscosity of said casting mixture is controlled and the settling of said filler is minimized by the presence of units from said carboxylic acid in said polymer.

대표청구항 ▼

A process for preparing highly filled acrylic articles having a thickness of about 0.1 to 4.0 inch comprising: (a) providing a solution of polymer in monomer, in a polymer:monomer ratio of from 1:9 to 1:1, wherein (i) said polymer is polymerized from a mixture comprising at least 50 percent by weigh

A process for preparing highly filled acrylic articles having a thickness of about 0.1 to 4.0 inch comprising: (a) providing a solution of polymer in monomer, in a polymer:monomer ratio of from 1:9 to 1:1, wherein (i) said polymer is polymerized from a mixture comprising at least 50 percent by weight C1-8 alkyl methacrylates or mixtures thereof and 0.01 percent to 8 percent by weight copolymerizable ethylenically unsaturated carboxylic acid and is characterized by a molecular weight of from about 20,000 to 100,000; and (ii) said monomer comprises at least 50 percent by weight C1-8 alkyl methacrylate or mixtures thereof; (b) mixing into said solution a catalytic amount of polymerization promoter system; (c) blending into the mixture from (b) above 40 percent to 80 percent inert particulate filler, based on total amount, to form a casting mixture; (d) introducing said casting mixture to a mold; and (e) curing said casting mixture; whereby the viscosity of said casting mixture is controlled and the settling of said filler is minimized by the presence of units from said carboxylic acid in said polymer. A filled acrylic sheet having a thickness of about 0.1 to 4.0 inch prepared by the process of claim 1.