Manufacture of shear-resistant aqueous copolymer emulsions

Details Manufacture of shear-resistant aqueous copolymer emulsions Manufacture of shear-resistant aqueous copolymer emulsions

1975-10-29

1977-09-27

Hayes, Lorenzo B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296H, 260 296SQ, 260 296HN, 427390R, 427391, C08L 2504, C08L 3302

Patent

active

040510930

ABSTRACT:
Shear-resistant aqueous copolymer emulsions which can be used for sizing paper are manufactured by first copolymerizing, in the aqueous phase of an aqueous emulsion, using conventional polymerization initiators which form free radicals, (A) from 0.5 to 15 per cent by weight of monomers containing a polymerizable C.dbd.C bond and at least one carboxyl and/or sulfonic acid or phosphate or phosphite group with (B) from 5 to 30 per cent by weight of monomers containing a C.dbd.C bond and a tertiary or quaternary amino group, or a nitrogen-containing heterocyclic group, and then adding, while continuing the copolymerization, (C) from 0 to 94.5 per cent by weight of styrene and/or acrylonitrile and (D) from 0 to 94.5 per cent by weight of acrylic or methacrylic acid esters of alkanols of 1 to 8 carbon atoms as well as (E) from 0 to 30 per cent by weight of further olefinically unsaturated monomers, and completing the polymerization, the pH during the polymerization being less than 7 and the amount of monomers (C) and (D) together being at least 25 per cent by weight.

REFERENCES:
patent: 3296167 (1967-01-01), Turner et al.
patent: 3404114 (1968-10-01), Snyder et al.
patent: 3536650 (1970-10-01), Jasinski et al.
patent: 3853803 (1974-12-01), Anderson et al.
patent: 3925288 (1975-12-01), Ganslaw et al.
patent: 3957710 (1976-05-01), Rohmann et al.

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