Process for the production of high molecular weight oxymethylene

Details Process for the production of high molecular weight oxymethylene Process for the production of high molecular weight oxymethylene

1980-08-11

1982-01-26

Phynes, Lucille M.

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

Synthetic resins

From aldehyde or derivative thereof as reactant

528232, C08G 206

Patent

active

043129773

ABSTRACT:
A process for the production of high molecular weight oxymethylene copolymer in the presence of impurity is provided. The process provides a high molecular weight oxymethylene copolymer having a predetermined comonomer content. The process comprises the steps of determining the optimal catalyst concentration in a first oxymethylene copolymerization system which contains less than approximately 10 p.p.m. impurity; determining the concentration of impurity containing at least one active proton in a second copolymerization system; adjusting the catalyst concentration in the second copolymerization system so that the total concentration of catalyst and impurity in the second copolymerization system is maintained at the optimal concentration of catalyst in the first copolymerization system; and adjusting the concentration of comonomer in the second copolymerization system so as to maintain the predetermined comonomer content in the oxymethylene copolymer product.

REFERENCES:
patent: 3027352 (1962-03-01), Walling et al.
patent: 3376361 (1968-04-01), Halek et al.
patent: 3597397 (1971-08-01), Chen
patent: 4087411 (1978-05-01), Sugio et al.
patent: 4224435 (1980-09-01), Sugio et al.

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