Production of an improved non-reinforced polyoxymethylene moldin

Details Production of an improved non-reinforced polyoxymethylene moldin Production of an improved non-reinforced polyoxymethylene moldin

1977-10-28

1981-10-06

Anderson, Harold D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 459D, 525398, C08K 516, C08L 5902

Patent

active

042934699

ABSTRACT:
The mold deposit problem commonly associated with non-reinforced polyoxymethylene molding compositions which creates a non-uniform surface on a molded article effectively is minimized. The polyoxymethylene polymer initially is heated (as described) while in admixture with about 0.25 to about 3 percent by weight based upon the weight of the polyoxymethylene polymer of a certain polycarbodiimide. The polycarbodiimide contains at least three carbodiimide units per polycarbodiimide molecule and is derived from one or more aromatic diisocyanates which are unsubstituted or are substituted with up to one methyl substituent on each aromatic ring.

REFERENCES:
patent: 3135718 (1964-06-01), Wagner et al.
patent: 3170896 (1965-02-01), Wagner et al.
patent: 3755242 (1973-08-01), Reich
patent: 3839267 (1974-10-01), Golder
patent: 4071503 (1978-01-01), Thomas et al.

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