Process for producing vinyl chloride resin composition

Claim 1

A METHOD FOR PRODUCING VINYL CHLORIDE RESIN COMPOSITION HAVING EXCELLENT IMPACT STRENGTH, WEATHER RESISTANCE, AND PROCESSABLITITY WHICH CONSISTS ESSENTIALLY OF UNIFORMING BLENDING: 95 TO 70 PARTS BY WEIGHT OF A VINYL CHLORIDE POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF VINYL CHLORIDE, AND COPOLYMERS OF VINYL CHLORIDE CONTAINING THEREIN MORE THAN 70PERCENT BY WEIGHT OF VINYL CHLORIDE, AND 5 30 PARTS BY WEIGHT OF A MULTI-COMPONENT TYPE RESIN WHICH IS PRODUCED BY THE FOLLOWING STEP: A. PREPARING A LATEX OF A RUBBER POLYMER BY POLYMERIZING A MONOMER MIXTURE SELECTED FROM THE GROUP CONSISTING OF A MIXTURE OF 40 TO 95 PERCENT BY WEIGHT OF ACRYLIC ACID ALKYL ESTER, 5 TO 40PERCENT BY WEIGHT OF BUTADIENE, AND 0.1 TO 30PERCENT BY WEIGHT OF METHYLMETHACRYLATE IN THE PRESENCE OF FROM 0.01 TO 3PERCENT BY WEIGHT OF CROSSLINKING AGENT, SAID POLYMER LATEX CONTAINING FROM 50 TO 75 PARTS BY WEIGHT OF SAID RUBBER POLYMER; B. ADDING TO SAID LATEX FROM 50 TO 25 PARTS BY WEIGHT OF STYRENE AND METHYLMETHACRYLATE IN A RATIO OF 90 TO 10PERCENT BY WEIGHT OF STYRENE, 10 TO 90PERCENT BY WEIGHT OF METHYLMETHACRYLATE AND 0.01 TO 3PERCENT BY WEIGHT OF A CROSSLINKING AGENT COPOLYMERIZABLE WITH SAID MONOMERS; C. DIVIDING SAID MONOMER COMPONENTS INTO FIRST AND SECOND GRAFTING COMPONENTS, SAID FIRST GRAFTING COMPONENT BEING COMPOSED OF STYRENE AND METHYLMETHACRYLATE WITH STYRENE AS THE PRINCIPAL COCONSTOTUTENT AND CONTAINING THEREIN THE CROSSLINKING AGENT, AND SAID SECOND GRAFTING COMPONENT BEING COMPOSED OF METHYLMETHACRYLATE ALONE AND CONTAINING THEREIN THE CROSSLINKING AGENT; D. ADDING SAID FIRST GRAFTING COMPONENT TO SAID CROSSLINKED COPOLYMER RUBBER LATEX TO BE GRAFT-POLYMERIZED THEREUPON; E. FURTHER ADDING SAID SECOND GRAFTING COMPONENT TO SAID GRAFT-POLYMERIZED COPOLMER LATEX TO BE FURTHER GRAFTED THEREUPON ANC F. RECOVERING THE MULTI-COMPONENT TYPE RESIN FROM SAID GRAFT-POLYMERIZED LATEX THROUGH THE PROCESSES OF SALTING OUT, DEHYDRATION AND DRYING.

Claim 2

A METHOD FOR PRODUCING VINYL CHLORIDE RESIN COMPOSITION HAVING EXCELLENT IMPACT STRENGTH, WEATHER RESISTANCE, AND PROCESSABLITITY WHICH CONSISTS ESSENTIALLY OF UNIFORMING BLENDING: 95 TO 70 PARTS BY WEIGHT OF A VINYL CHLORIDE POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF VINYL CHLORIDE, AND COPOLYMERS OF VINYL CHLORIDE CONTAINING THEREIN MORE THAN 70PERCENT BY WEIGHT OF VINYL CHLORIDE, AND 5 30 PARTS BY WEIGHT OF A MULTI-COMPONENT TYPE RESIN WHICH IS PRODUCED BY THE FOLLOWING STEP: A. PREPARING A LATEX OF A RUBBER POLYMER BY POLYMERIZING A MONOMER MIXTURE SELECTED FROM THE GROUP CONSISTING OF A MIXTURE OF 40 TO 95 PERCENT BY WEIGHT OF ACRYLIC ACID ALKYL ESTER, 5 TO 40PERCENT BY WEIGHT OF BUTADIENE, AND 0.1 TO 30PERCENT BY WEIGHT OF METHYLMETHACRYLATE IN THE PRESENCE OF FROM 0.01 TO 3PERCENT BY WEIGHT OF CROSSLINKING AGENT, SAID POLYMER LATEX CONTAINING FROM 50 TO 75 PARTS BY WEIGHT OF SAID RUBBER POLYMER; B. ADDING TO SAID LATEX FROM 50 TO 25 PARTS BY WEIGHT OF STYRENE AND METHYLMETHACRYLATE IN A RATIO OF 90 TO 10PERCENT BY WEIGHT OF STYRENE, 10 TO 90PERCENT BY WEIGHT OF METHYLMETHACRYLATE AND 0.01 TO 3PERCENT BY WEIGHT OF A CROSSLINKING AGENT COPOLYMERIZABLE WITH SAID MONOMERS; C. DIVIDING SAID MONOMER COMPONENTS INTO FIRST AND SECOND GRAFTING COMPONENTS, SAID FIRST GRAFTING COMPONENT BEING COMPOSED OF STYRENE AND METHYLMETHACRYLATE WITH STYRENE AS THE PRINCIPAL COCONSTOTUTENT AND CONTAINING THEREIN THE CROSSLINKING AGENT, AND SAID SECOND GRAFTING COMPONENT BEING COMPOSED OF METHYLMETHACRYLATE ALONE AND CONTAINING THEREIN THE CROSSLINKING AGENT; D. ADDING SAID FIRST GRAFTING COMPONENT TO SAID CROSSLINKED COPOLYMER RUBBER LATEX TO BE GRAFT-POLYMERIZED THEREUPON; E. FURTHER ADDING SAID SECOND GRAFTING COMPONENT TO SAID GRAFT-POLYMERIZED COPOLMER LATEX TO BE FURTHER GRAFTED THEREUPON ANC F. RECOVERING THE MULTI-COMPONENT TYPE RESIN FROM SAID GRAFT-POLYMERIZED LATEX THROUGH THE PROCESSES OF SALTING OUT, DEHYDRATION AND DRYING.