Abstract 1. A MOLDING POWDER WHICH COMPRISES A PARTICULATE, INTIMATE MIXTURE OF (A) A COPOLYMER (1) CONSISTING OF ABOUT 15 TO ABOUT 40 WEIGHT PERCENT GLYCIDYL METHACRYLATE, ABOUT 10 TO ABOUT 30 WEIGHT PERCENT METHACRYLATE, AND A REMAINDER CONSISTING ESSENTIALLY OF METHYL METHACRYLATE, AND (2) HAVING AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF ABOUT 1,500 TO ABOUT 16,000, WITH LESS THAN 5 PERCENT OF THE MOLECULES OF SUCH COPOLYMER HAVING A MOLECULAR WEIGHT BELOW 1,000, A SOFTENING POINT ABOVE 25:C., AND EPOXIDE GROUPS IN ITS MOLECULAR STRUCTURE RESULTANT OF INCLUSION OF SAID GLYCIDYL METHACRYLATE AS A CONSTITUENT MONOMER THEREOF, AND (B) A MONOMERIC ANHYDRATE PRESENT IN AN AMOUNT WHICH PROVIDES ABOUT 0.5 TO ABOUT 1.5 ANHYDRIDE GROUPS PER EACH EPOXY GROUP IN THE MOLDING POWDER.
A MOLDING POWDER WHICH COMPRISES A PARTICULATE, INTIMATE MIXTURE OF (A) A COPOLYMER (1) CONSISTING OF ABOUT 15 TO ABOUT 40 WEIGHT PERCENT GLYCIDYL METHACRYLATE, ABOUT 10 TO ABOUT 30 WEIGHT PERCENT METHACRYLATE, AND A REMAINDER CONSISTING ESSENTIALLY OF METHYL METHACRYLATE, AND (2) HAVING AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF ABOUT 1,500 TO ABOUT 16,000, WITH LESS THAN 5 PERCENT OF THE MOLECULES OF SUCH COPOLYMER HAVING A MOLECULAR WEIGHT BELOW 1,000, A SOFTENING POINT ABOVE 25:C., AND EPOXIDE GROUPS IN ITS MOLECULAR STRUCTURE RESULTANT OF INCLUSION OF SAID GLYCIDYL METHACRYLATE AS A CONSTITUENT MONOMER THEREOF, AND (B) A MONOMERIC ANHYDRATE PRESENT IN AN AMOUNT WHICH PROVIDES ABOUT 0.5 TO ABOUT 1.5 ANHYDRIDE GROUPS PER EACH EPOXY GROUP IN THE MOLDING POWDER.
Claim 2
Dependent Claim
124 words
A MOLDING POWDER WHICH COMPRISES A PARTICULATE, INTIMATE MIXTURE OF (A) A COPOLYMER (1) CONSISTING OF ABOUT 15 TO ABOUT 40 WEIGHT PERCENT GLYCIDYL METHACRYLATE, ABOUT 10 TO ABOUT 30 WEIGHT PERCENT METHACRYLATE, AND A REMAINDER CONSISTING ESSENTIALLY OF METHYL METHACRYLATE, AND (2) HAVING AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF ABOUT 1,500 TO ABOUT 16,000, WITH LESS THAN 5 PERCENT OF THE MOLECULES OF SUCH COPOLYMER HAVING A MOLECULAR WEIGHT BELOW 1,000, A SOFTENING POINT ABOVE 25:C., AND EPOXIDE GROUPS IN ITS MOLECULAR STRUCTURE RESULTANT OF INCLUSION OF SAID GLYCIDYL METHACRYLATE AS A CONSTITUENT MONOMER THEREOF, AND (B) A MONOMERIC ANHYDRATE PRESENT IN AN AMOUNT WHICH PROVIDES ABOUT 0.5 TO ABOUT 1.5 ANHYDRIDE GROUPS PER EACH EPOXY GROUP IN THE MOLDING POWDER.