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1. (WO2018106363) METHOD FOR PRODUCING A GRANULAR POLYMER BLEND

Pub. No.:    WO/2018/106363    International Application No.:    PCT/US2017/059631
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Fri Nov 03 00:59:59 CET 2017
IPC: C08J 3/12
C08L 33/02
C11D 1/37
C11D 3/37
C11D 11/00
Applicants: ROHM AND HAAS COMPANY
Inventors: BACKER, Scott
BUTTERICK, Robert
ROBERTS, Roy
Title: METHOD FOR PRODUCING A GRANULAR POLYMER BLEND
Abstract:
A method for producing a blend of at least one first polymer and at least one second polymer. The first polymer comprises: (a) polymerized units of 22 to 80 wt % of one or more monoethylenically unsaturated C3-C6 carboxylic acid monomers, and (b) polymerized units of 20 to 78 wt % of one or more C1-C12 alkyl (meth)acrylate monomers, and has a weight-average molecular weight from 20,000 to 100,000; and the second polymer comprises polymerized units of 50 to 100 wt% of one or more monoethylenically unsaturated C3-C6 carboxylic acid monomers and has a weight-average molecular weight from 1,000 to 45,000. The first polymer comprises from 1 to 50 wt% of total weight of the first and second polymers. At least one first polymer at a pH from 3 to 4 with at least one second polymer at a pH from 2 to 4 are combined.