Stable systems based on polyvinyl chloride and reactive plasticizers

Abstract

Abstract BLENDS OF POLYVINYL CHLORIDE AND REACTIVE POLYUNSATURATED ESTER PLASTICIZERS SUCH AS GLYCOL DIACRYLATES AND DIMETHACRYLATES INCLUDING FREE RADICAL GENERATING POLYMERIZATION CATALYST ARE GELLED AT AN INTERMEDIATE TEMPERATURE HIGH ENOUGH TO SOLVATE THE POLYVINYL CHLORIDE BUT INSUFFICIENT TO CURE THE REACTIVE PLASTICIZERS AS BY THE USE OF TEMPERATURES IN THE RANGE OF 90-120*C. FOR SHORT PERIODS OF TIME TO FORM AN AT LEAST PARTLY SOLVATED FLEXIBLE SUBSTANTIALLY UNCURED SOLID MATERIAL WHICH IS STABLE AT ROOM TEMPERATURE AND WHICH CAN BE SUBSEQUENTLY SHAPED, FLOWED, AND CURE BY THE APPLICATION OF APPROPRIATE PRESSURE AT A TEMPERATURE IN THE RANGE OF 120-200*C. FIBER REINFORCED GELS ARE PARTICULARLY CONTEMPLATED. TO FACILITATE HANDLING AND TO PROVIDE BLENDS WITH BETTER FLUIDITY AND VISCOSITY STABILITY AND WHICH FORM NONBRITTLE PRODUCTS EVEN WITHOUT FIBER REINFORCEMENT, MIXTURES OF POLYVINYL CHLORIDE HAVING AN AVERAGE PARTICLE SIZE OF FROM 0.05 TO 30 MICRONS WITH LARGER POLYVINYL CHLORIDE PARTICLES ARE USED IN WEIGHT PROPORTIONS OF FROM 60-80 PARTS OF POLYVINYL CHLORIDE PER 40-20 PARTS OF REACTIVE PLASTICZER.

Inventors

• 👤 Irving E Muskat

Bibliographic Details