| abstract |
High density thermoset foams of acrylic polymers are prepared by dry mixing a hydroxy-functional acrylic polymer, e.g., a copolymer of styrene, ethyl acrylate, hydroxy alkyl acrylate and acrylic acid, with a crosslinking agent, e.g., a melamineformaldehyde condensate, and then subjecting the resulting mixture to conditions sufficient to cause the mixture to foam and to crosslink to a thermoset material. |