Molding nitrile resin compositions

Abstract

Abstract A MOLDING NITRILE RESIN COMPOSITION SUITABLE AS A MATERIAL FOR FOOD-PACKAGING FILMS OR FOOD CONTAINERS WHICH ARE EXCELLENT IN PROCESSABILITY, TRANSPARENCY, IMPACT RESISTANCE, HARDNESS, APPERANCE AND GAS-IMPERMEABILITY, AND WHICH REQUIRED SUBSTANTIALLY NO HEAT STABILIZER, IS OBTAINED BY EMULSION-POLYMERZING IN AN AQUEOUS MEDIUM 95 TO 40 PARTS BY WEIGHT OF A MONOMERIC MIXTURE (A) OF 55 TO 90% BY WEIGHT OF ACRYLONITRILE OR METHACRYLONITRILE AND 10 TO 45% BY WEIGHT OF A LOWER ALKYL ACRYLATE OR A LOWER ALKYL METHACRYLATE, IN THE PRESENCE OF 5 TO 60 PARTS BY WEIGHT OF A RUBBER-LIKE POLYMER (B) COMPOSED OF 30 TO 80% BY WEIGHT OF AN ALKYL ACRYLATE OR AN ALKYL METACRYLATE, 4 TO 50% BY WEIGHT OF A CONJUGATED DIOLEFIN AND 5 TO 30% BY WEIGHT OF A VINYL AROMATIC HYDROCARBON. THE SAID COMPOSITION CAN BE BLENDED, IF NECESSARY, WITH A COPOLYMER OBTAINED BY POLYMERZING IN AN AQUEOUS MEDIUM OF THE SAID MONOMERIC MIXTURE (A) IN THE ABSENCE OF THE SAID RUBBER-LIKE POLYMER (B), IN A PROPORTION OF UP TO 100 PART BY WEIGHT OF THE COPOLYMER PER 100 PARTS BY WEIGHT OF THE SAID COMPOSITION, TO ADJUST THE CONTENT OF SAID RUBBER-LIKE POLYMER (B) TO ANY VALUE WITHIN THE RANGE OF 5 TO 30% BY WEIGHT BASED ON THE WEIGHT OF THE RESULTING COMPOSITION.

Inventors

• 👤 R Endo

Bibliographic Details