Polymerization process for aqueous polymer dispersions of vinyl

Details Polymerization process for aqueous polymer dispersions of vinyl Polymerization process for aqueous polymer dispersions of vinyl

1984-06-28

1985-07-30

Griffin, Ronald W.

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...

524716, 524734, 524798, 524804, 526208, 526227, 526228, 526910, 526911, 526915, C08F21002, C08L 3104, C09J 314, C04B 1324

Patent

active

045322953

ABSTRACT:
A process for the preparation of aqueous polymer dispersions comprising polymerizing vinyl esters and up to 50% by weight of the total monomer of compounds with unsaturated ethylenic bonds at a temperature of 10.degree. to 100.degree. C. in the presence of an at least partially water-soluble free-radical initiator and at least one starch member of the group consisting of cyanalkylated starch, hydroxyalkylated starch and carboxyalkylated starch and optionally present conventional adjuvants with the starting mixture containing not more than one-third of the total monomers and the remaining monomers being added by metering during the polymerization, the initiators being at least one member of the group consisting of hydrogen peroxide and organic hydroperoxides in an amount of at least 30 mmol per kg of total monomer mixture and optionally present water-soluble reducing agent and the amount of starch being at least 1% by weight based on the total monomer weight.

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patent: 4035329 (1977-07-01), Wiest et al.
patent: 4118556 (1978-10-01), Konig et al.
patent: 4219454 (1980-08-01), Iacoviello et al.
patent: 4322322 (1982-03-01), Lambrechts et al.
patent: 4322516 (1982-03-01), Wiest et al.

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