Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1997-03-13
1998-11-24
McCamish, Marion E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524458, 524460, 524832, 524833, C08L 3308
Patent
active
058408045
ABSTRACT:
A method of producing low-viscosity water-based water-soluble polymer dispersions having a high concentration of the principal substance is achieved by polymerizing the following monomer components,
(a1) 50-99.999 wt. % of at least one water-soluble monomer;
(a2) 0.001-1 wt. % of at least one crosslinking monomer with at least two ethylenically unsaturated radically polymerizable groups;
(a3) 0-30 wt. %, particularly 1-25 wt. %, of at least one hydrophobic monomer; and
(a4) 0-25 wt. %, particularly 0.1-15 wt. %, of at least one amphiphilic monomer,
in aqueous solution, in the presence of at least one polymer dispersant, to form a polymer (A), where the sum of the amounts of the components represented by the monomers (a1), (a2), (a3), and (a4) is 100 wt. % of the monomers, the weight average molecular weight of the resulting polymer (A) is at least 500,000 Dalton, and polymer (A) is incompatible with the dispersant.
REFERENCES:
patent: 4380600 (1983-04-01), Hosada et al.
patent: 4673704 (1987-06-01), Flesher et al.
patent: 4835206 (1989-05-01), Farrar et al.
patent: 4929655 (1990-05-01), Takeda et al.
patent: 5403883 (1995-04-01), Messner et al.
Braum Manfred
Carl Joachim
Desch Wolfram
Quis Peter
Guarriello John J.
McCamish Marion E.
Roehm GmbH Chemische Fabrik
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