Sealer composition of a methacrylate copolymer,an epoxy resin,polymethyl methacrylate and an organic plasticizer

Abstract

Abstract 1. A SEALER COMPOSITION COMPRISING 2-3% BY WEIGHT OF A BINDER DISSOLVED IN 70-98% BY WEGHT OF AN ORGANIC SOLVENT FOR THE BINDER; WHEREIN THE BINDER CONSISTS ESSENTIALLY OF (A) 30-45% BY WEIGHT, BASED ON THE WEIGHT OF THE BINDER, OF A METHACRYLATE COPOLYMER CONSISTING ESSENTING ESSENTIALLY OF 90-99% BY WEIGHT, BASED ON THE WEIGHT OF THE COPOLYMER, OF METHYL METHACRYLATE AND CORRESPONDING 1-10% BY WEIGHT, BASED ON THE WEIGHT OF THE COPOLYMER, OF A HYDROXY AMINOPROPYL ACRYLATE OR A HYDROXY AMINOPROPYL METHACRYLATE; AND THE COPOLYMER HAVING AN INHERENT VISCOSITY OF ABOUT 0.25 TO 0.35 AT 0.5% POLYMER SOLIDS MEASURED IN ETHYLENE DICHLORIDE SOLVENT AT 25*C., (B) 25-45% BY WEIGHT, BASED ON THE WEIGHT OF THE BINDER, OF AN EPOXY RESIN OF THE FORMULA (OXIRANYL-CH2-(O-(1,4-PHENYLENE)-C(-CH3)2-(1,4-PHENYLENE)- O-CH2-CH(-OH)-CH2)N-O-(1,4-PHENYLENE)-C(-CH3)2- (1,4-PHENYLENE)-O-CH2-)-OXIRANE N IS A POSITIVE INTEGER SUFFICIENTLY LARGE TO PROVIDE A WEIGHT AVERAGW MOLECULAR WEIGHT OF ABOUT 15,00045,000 (C) 5-20% BY WEIGHT, BASED ON THE WEIGHT OF THE BINDER, OF POLYMETHYL METHACRYLATE HAVING A RELATIVE VISCOSITY OF 0.25 TO 0.45 MEASURED AT 0.5% POLYMER SOLIDS IN ETHYLENE DICHLORIDE SOLVENT AT 25* C.; AND (D) 5-25% BY WEIGHT, BASED ON THE WEIGHT OF THE BINDER, OF AN ORGANIC PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF BUTYL BENZYL PHTHALATE, DIBUTYL PHTHALAT, 2-ETHYLHEXYL PHTHALATE, DICYCLOHEXYL PHTHALATE, DIBENZYL PHTHALATE, BUTYL CYCLOHEXYL PHTHALATE AND DIMETHYL CYCLOHEXYL PHTHALATE.

Inventors

• 👤 R Hiss

Bibliographic Details