Abstract:
A powdered composition capable of being worked on heating is prepared from a PVC, or PVC copolymer, base, an/ impact resistant/ antishock additive, stabilisers and lubricants, by first mixing the additives at a temperature of 40* to 120*C. The mixture is allowed to cool and then dispersed in the PVC base by mixing in the cold. The mixture becomes homogeneous during the heating prior to working.
Abstract:
A COMPOSITION COMPRISING A VINYL CHLORIDE POLYMER, A PLASTICIZER AND A SILICONE RESIN SELECTED FROM A SILICONE RESIN HAVING R3SIO1/2 MONOFUNCTIONAL UNITS AND SIO2 TETRAFUNCTIONAL UNITS WITH THE RATIO OF THE MONOFUNCTIONAL UNITS TO THE TETRAFUNCTIONAL UNITS BEING FROM 0.25 TO 0.75 WITH 3.0 TO 5.0% BY WEIGHT OF HYDROXYL GROUPS AND A SILICONE RESIN HAVING R''3SIO1/2 MONOFUNCTIONAL UNITS AND SIO2 TETRAFUNCTIONAL UNITS AND R22SIO DIFUNCTIONAL UNITS WITH THE RATIO OF MONOFUNCTIONAL UNITS TO TETRAFUNCTIONAL UNITS TO DIFUNCTIONAL UNITS BEING FROM 0.25-0.75 TO 1 TO 0.05-0.1 WITH 3.0 TO 5.0% BY WEIGHT OF HYDROXYL GROUPS AND WHEREIN R, R'', R2 ARE MONOFUNCTIONAL HYDROCARBON RADICALS. THE COMPOSITION IS MECHANICALLY FROTHED WITH AIR TO PRODUCE A FOAM WHICH IS THEN HEATED TO GEL AND FUSE THE FOAM. THERE IS PREFERABLY USED IN THE ABOVE COMPOSITION ONE OF THE ABOVE SILICONE RESINS WHICH HAS BEEN FURTHER TREATED SO THAT IT HAS LESS THAN ABOUT 0.5% BY WEIGHT OF HYDROXYL GROUPS. IN ADDITION, THERE IS PROVIDED A VERY EFFECIENT FOAMING AGENT WHICH IS PRODUCED BY ADDING ONE OF THE ABOVE SILICONE RESINS WITH A SELECTED CLASS OF PLASTE ICIZERS, SUCH AS DIOCTYL PHTHALATE.
Abstract:
IT HAS BEEN FOUND THAT PROCESSABILITIES OF VINYL CHLORIDE POLYMER OR COPOLYMER CAN BE IMPROVED, WITHOUT AFFECTING THE SURVACE CHARACTERISTICS AND MECHANICAL PROPERTIES THEREOF, BY THE INCORPORATION OF 0.1 TO 20% BY WEIGHT OF A CROSS-LINKED VINYL CHLORIDE COPOLYMER.
Abstract:
A FOUR STAGE, SEQUENTIALLY PRODUCED POLYMER COMPRISES (A) A RUBBERY, FIRST STAGE POLYMER FORMED BY EMULSION POLYMERIZATION OF A MONOMER CHARGE TO 70 TO 99.9 WEIGHT PERCENT OF AN ALKYLACRYLATE COMPOUND, 0 T0 30 WEIGHT PERCENT OF A VINYLAROMATIC MONOMER INTERPOLYMERIZABLE THEREWITH, AND 0.1 TO 10 WEIGHT PERCENT OF A POLYFUNCTIONAL CROSS-LINKING MONOMER BASED ON THE WEIGHT OF THE MONOMER CHARGE; (B) A SECOND STAGE POLYMER FORMED BY EMULSION POLYMERIZING IN THE PRESENCE OF THE POLYMER STAGE (A), A SECOND MONOMER CHARGE OF 70 TO 99.9 WEIGHT PERCENT OF A VINYLAROMATIC MONOMER FROM 0 TO 30 WEIGHT PERCENT OF ALKYL ACRYLATE, WHEREIN THE ALKYL GROUP OF THE ALKYL ACRYLATE HAS ABOUT 2 TO 8 CARBON ATOMS, INTERPOLYMERIZABLE THEREWITH, AND 0.1 TO 10 WEIGHT PERCENT OF A SECOND POLYFUNCTIONAL CROSS-LINKING AGENT; (C) A THIRD STAGE POLYMER FORMED BY EMULSION POLYMERIZATION IN THE PRESENCE OF THE STAGE (A) AND STAGE (B) POLYMER PRODUCT, AND COMPRISING 80 T0 100 WEIGHT PERCENT OF AN ALKYL METHACRYLATE, WHEREIN THE ALKYL GROUP HAS ABOUT 1 TO 4 CARBON ATOMS; AND (D) A FOURTH STAGE POLYMER FORMED BY THE EMULSION POLYMERIZATION IN THE PRESENCE OF THE STAGE (A), STAGE (B) AND STAGE (C) POLYMER PRODUCT, AND COMPRISING FROM 80 TO 100 WEIGHT PERCENT OF A VINYL HALIDE. PREFERABLY THE POLYMER IS USED AS A MODIFIER FOR VINYL HALIDE POLYMERS. WHEN SO USED, THE REFRACTIVE INDEX OF STAGE (A) + (B) + (D) IS SUBSTANTIALLY EQUAL TO THE REFRACTIVE INDEX OF THE MODIFIED VINYL HALIDE POLYMER + STAGE (C) OF THE MODIFIER.
Abstract:
A SYNTHETIC PITCH OR FIELD FOR CRICKET, TENNIS, AND LIKE BALL GAMES IS PROVIDED, WHICH, IN CONTACTS TO PREVIOUS PROPOSED PITCHES, CLOSELY SIMULATES GRASS, PARTICULARLY IN ITS BOUNCES CHARACTERISTICS, ESPECIALLY FOR SPINNING BALLS. THE SYNTHETIC PITCH OR FIRELD CONTAINS 25% TO 75% OF LASTICIZED POLYVINYL CHLORIDE MATERIAL, 5% TO 20% OF A FINELY DIVINDED FIBROUS MATERIAL, 0% TO 20% OF A NATURAL OR SYNTHETIC RUBBER, PREFERABLY A NITRILE RUBBER, AND 10% TO 60% OF A FINELY DIVIDED, PREFERABLY LOW DENSITY FILLER, FOR EXAMPLE CHALK AND CLAY, AND MAY ALSO CONTAIN A GREEN PIGMENT.
Abstract:
A RESIN COMPOSITION COMPRISNG (I) 100 PARTS BY WEIGHTS OF A MIXTURE CONSISTING OF 50 TO 95% BY WEIGHT OF A SUSPENSION-POLYMERIZED POLYVINYL CHLORIDE HAVING AN AVERAGE PARTICLE SIZE OF 10 TO 40U, AND AN AVERAGE POLYMERIZATION DEGREE OF 700 TO 1,400 WHICH HAS BEEN PREPARED BY SUPENSION-POLYMERIZING VINYL CHLORIDE IN THE PRESENCE OF CELLULOSE DERIVATIVES CONTAINING ALKYL GROUP AND/OR HYDORXY-ALKYL GROUP IN THEIR UNITS AS A SUSPENSION STABILIZER AND AN ANIONIC EMULSIFYING AGENT AS AN AUXILIARY SUSPENSION STABILIZER AND 50 TO 5%, BY WEIGHT OF AN EMULSIONPOLYMERIZED POLYVINYL CHLORIDE HAVING AN AVERAGE POLYMERIZATION DEGREE OF 700 TO 1,400 IN WHICH PARTICLES HAVING AN AVERAGE PRIMARY PARTICLE SIZE OF 0.1 TO 1.5U HAVE BEEN AGGLOMERATED TO PARTICLES HAVING AN AVERAGE SECONDARY PARTICLE SIZE OF 20 TO 50U, AND (II) 0.1 TO 3 PARTS BY WEIGHT OF A NONIONIC ANTISTATIC AGENT IS HIGH IN PROCESSABILITY AND IS SUITABLE FOR PRODUCING A BATTERY SEPARATOR EXCELLENT IN MECHANICAL STRENGTH AND ELECTRIC RESISTANCE.
Abstract:
Vinyl halide polymers which exhibit improved processing characteristics without sacrificing physical properties are prepared by polymerizing vinyl halide monomer in the presence of an aliphatic polymercaptan having at least three mercaptan groups in an amount based on -SH equivalence of from about 0.00015 to about 0.05 equivalence -SH per mole of monomeric material. The monomer is preferably 100 percent vinyl chloride though mixtures containing a predominant amount of vinyl chloride with minor amounts of other ethylenically unsaturated monomers can also be used.
Abstract:
Molding composition containing tactic vinyl chloride homo or copolymer and 5 to 25 weight percent of at least one member selected from the group consisting of a binary copolymer of methyl methacrylate and 1 to 20 weight percent of another methacrylate or 1 to 10 weight percent of an acrylate each having an alcoholic moiety of two to 10, preferably two to four, carbon atoms; a graft copolymer of methyl methacrylate, butadiene and styrene; and a graft copolymer of acrylonitrile, butadiene and styrene. This molding composition has improved physical properties as compared to tactic vinyl chloride polymers alone.
Abstract:
Interpolymers especially useful as processing aids for polyvinyl chloride (PVC) are prepared by polymerizing vinyl chloride in the presence of polymethacrylonitrile (PMAN) or by polymerizing methacrylonitrile in the presence of polyvinyl chloride. In a preferred method, a conventional PVC polymerization is halted at or near its completion, unreacted monomer is removed, a minor proportion up to about 50 percent of methacrylonitrile (MAN) monomer, based on the weight of the interpolymer, is added and the reaction continued until the MAN polymerizes. The PVC-PMAN interpolymer recovered from such a system is an effective aid in processing conventional PVC, or it can be used per se since it is readily processable by calendering or extruding.
Abstract:
Thermoplastic resinous compositions comprising a blend of (1) 20 to 60 percent by weight of vinyl chloride resin and (2) 80 to 40 percent by weight of (A) 40 to 80 percent by weight of a resin prepared by copolymerizing 30 to 80 percent by weight of alpha methylstyrene, 5 to 50 percent by weight of methyl methacrylate, and 3 to 30 percent by weight of acrylonitrile; and (B) 60 to 20 percent by weight of a graft copolymer prepared by graft copolymerization of 65 to 35 percent by weight butadienic polymer and 35 to 65 percent by weight of a monomer mixture of 50 to 80 percent by weight of styrene, 20 to 50 percent by weight of methyl methacrylate, and 0 to 30 percent by weight of acrylonitrile.