Process for polymerizing formaldehyde

Details Process for polymerizing formaldehyde Process for polymerizing formaldehyde

1980-08-22

1982-06-01

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From aldehyde or derivative thereof as reactant

528232, 528236, 528237, 528238, 528242, 528243, C08G 400

Patent

active

043329306

ABSTRACT:
Undesirable deposition of polyoxymethylene onto the inner wall of a polymerization vessel and onto a stirrer, which deposition is observed in the slurry polymerization of formaldehyde carried out in an inert organic liquid medium in the presence of a polymerization catalyst, can be minimized by carrying out the slurry polymerization in the presence of at least one polyvalent metal salt selected from polyvalent metal salts of alkylsalicylic acids and polyvalent metal salts of dialkyl esters of sulfosuccinic acid. Optionally, a polyethylene glycol monoether may be used in addition to the polyvalent metal salt.

REFERENCES:
patent: 2994687 (1961-08-01), Goodman et al.
patent: 3111503 (1963-11-01), O'Connor et al.
patent: 4246396 (1981-01-01), Sukegawa et al.

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