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    • 31. 发明授权
    • High impact vinyl chloride resin formulations of improved clarity andmethod of making same
    • 高效氯乙烯树脂配方改进的澄清及其制备方法
    • US3763279A
    • 1973-10-02
    • US3763279D
    • 1971-05-12
    • GOODRICH CO B F
    • KELLEY P
    • C08F285/00C08F19/10C08F41/12
    • C08F285/00C08F214/06
    • A METHOD OF MAKING HIGH IMPACT VINYL CHLORIDE RESIN FORMULATIONS COMPRISING TWO CONSECUTIVE STAGES OF OVERPOLYMERIZATION, THE FIRST OF WHICH IS AN OVER-POLYMERIZATION IN AQUEOUS DISPERSION WHICH DEPOSITE A TOUGH, RUBBERY, ESSENTIALLY COMPLETELY-GELLED POLYACRYLATE ON SEED RESIN PARTICLES OF INSOLUBLE OR CROSSLINKED STYRENE COPOLYMER AND , IN THE SECOND STAGE, OVER-POLYMERIZATION, THE RUBBER-COATED FIRST-STAGE STYRENE COPOLYMER SEED PARTICLES ARE ENCASED IN A MATRIX OF HARD VINYL CHLORIDE RESIN. THE PARTICLE SIZE OF THE STYRENE COPOLYMER SEED RESIN LATEX PARTICLWS IS CRITICAL, HIGH IMPACT PRODUCTS BEING OBTAINED ONLY WITH SEED PARTICLES AVERAGING ABOUT 200 TO ABOUT 1700 A., MORE PREFERABLY BETWEEN ABOUT 350 A. AND ABOUT 1300 A. THE THICHNESS OF THE RUBBERY COATING ON THE SEED LATEX PARTICLES RESULTING FROM THE FIRST STAGE OVER-POLYMERIZATION LIKEWISE IS CRITICAL, HIGH IMPACT PRODUCTS BEING OBTAINED WHEN SUCH COATING IS FROM ABOUT 25 TO ABOUT 500 A. IN THICKNESS. A MOST PREFERRED MODIFICATION WHICH IS NOT ONLY ESSENTIALLY CLEAR AND ESSENTIALLY FREE OF HAZE BUT ALSO DEVELOPS HIGH IMPACT RESISTANCE IS PRODUCED WHEN SEED PARTICLES OF CROSS-LINKED STYRENE COPOLYMER AVERAGING FROM ABOUT 200 TO ABOUT 800 A. IN DIAMETER ARE GIVEN A GRAFTED COATING OR SHELL OF GELLED ACRYLATE FROM ABOUT 25 A. TO ABOUT 90 A. IN THICKNESS AND THE RESULTING PRODUCT THEN OVER-POLYMERIZED WITH A HARD VINYL CHLORDE RESIN. BOTH GRAFTING AND A CRITICALLY-THIN ACRLATE SHELL ARE NECESSARY TO PRODUCE THE CLEAR VERSION OF THE PRODUCTS OF THIS INVENTION. GRAFTING IS OBTAINED MOST EASILY BY CROSSLINKING THE STYRENE COPOLYMER SEED RESIN PARTICLES WITH A MONOMER SUCH AS ALLYL METHACRYLATE CONTAINING AT LEAST TWO POLYMERIZABLE GROUPINGS OF MARKEDLY FIEEERING POLYMERIZATION REACTIVITY WITH STYRENE MONOMER SUCH AS TO LEAVE AT LEAST A FEW OF POLYMERIZABLE REACTIVE SITES ON THE SURFACE OF THE SEED PARTICLES.
    • 34. 发明授权
    • Polyvinyl chloride resin composition having excellent impact resistance and weatherability
    • 聚氯乙烯树脂组合物具有优异的耐冲击性和耐候性
    • US3651175A
    • 1972-03-21
    • US3651175D
    • 1970-11-09
    • MITSUBISHI RAYON CO
    • IDE FUMIOMIURA MASANOBU
    • C08L27/00C08F285/00C08L1/00C08L23/00C08L27/06C08L27/24C08L51/00C08L51/02C08L101/00C08F29/24C08F41/12C08F45/24
    • C08L27/06C08F285/00C08L27/24C08L51/003Y10S525/902C08L2666/24
    • A POLYVINYL CHLORIDE RESIN COMPOSITION HAVING EXCELLENT IMPACE RESISTANCE AND WEATHERABILITY CAN BE OBTAINED BY BLENDING 100 PARTS BY WEIGHT OF A VINYL CHLORIDE POLYMER WITH 5 TO 80 PARTS BY WEIGHT OF A RESIN WHICH COMPRISES 20 TO 80 PARTS BY WEIGHT OF A CORE-CRUST STRUCTURAL CROSSLINKED POLYTALKYL ACRYLATE ELASTOMER (A) AND 80 TO 20 PARTS BY WEIGHT OF A POLYMER (B) OBTAINED BY POLYMERIZATION OF A VINYL MONOMER OR A MIXTURE THEREOF, AT LEAST A PART OF THE MONOMER FOR A POLYMER (B) BEING GRAFTPOLYMERIZED IN THE PRESENCE OF ELASTOMER (A), ELASTOMER (A) BEING OBTAINED BY THE STEPS OF DISSOLVING AN ORGANIC PEROXIDE HAVING A DECOMPOSITION TEMPERATURE HIGHER THAN 60*C. IN A MONOMER COMPRISING 80 TO 100% BY WEIGHT OF AT LEAST ONE ALKYL ACRYLATE WHOSE ALKYL GROUP HAS 1 TO 10 CARBON ATOMS AND 0 TO 20% BY WEIGHT OF A VINYL MONOMER, POLYMERIZING SAID MONOMER IN AN AQUEOUS SOLUTION CONTAINING A WATER SOLUBLE REDOX INITIATOR AND AN EMULSIFIER AT A TEMPERATURE LOWER THAN THE DECOMPOSITION TEMPERATURE OF SAID ORGANIC PEROXIDE TO OBTAIN AN ELASTOMER LATEX, HEATING AND STIRRING SAID ELASTOMER LATEX AT A TEMPERATURE HIGHER THAN THE DECOMPOSITION TEMPERATURE OF SAID ORGANIC PERIOXIDE TO OBTAIN A CROSSLINKED ELASTOMER LATEX ADDING TO A LATEX CONTAINING 100 PARTS BY WEIGHT OF SAID CROSSLINKED ELASTOMER 30 TO 150 PARTS BY WEIGHT OF A MONOMER WHICH COMPRISES 80 TO 100% BY WEIGHT OF AT LEAST ONE ALKYL ACRYLATE WHOSE ALKYL GROUP HAS 1 TO 10 CARBON ATOMS AND 0 TO 20% BH WEIGHT OF A VINYL MONOMER AND IN WHICH AN ORGANIC PEROXIDE HAVING A DECOMPOSITION TEMPERATURE HIGHER THAN 60*C. IS DISSOLVED, SEED POLYMERIZING THE MONOMER WITH A WATER SOLUBLE REDOX INITIATOR AT A TEMPERATURE LOWER THAN 60*C. IN THE PRESENCE OF SAID LATEX CONTAINING CROSSLINKED ELASTOMER AND HEATING THE THUS OBTAINED LATEX TO A TEMPERATURE HIGHER THAN 60*C.