Vinyl halide polymer impact modifiers

Abstract

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.

Inventors

• 👤 L Smiley
• 👤 N Bortnick
• 👤 W Niederhauser

Bibliographic Details