Polyacetals having an improved maximum sustained-use temperature

Details Polyacetals having an improved maximum sustained-use temperature Polyacetals having an improved maximum sustained-use temperature

1981-10-28

1983-05-31

Kight, III, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524227, 524291, 524538, 524542, 525398, C08K 534, C08L 6128

Patent

active

043861784

ABSTRACT:
Polyacetal molding materials which contain, as a stabilizer, from 0.1 to 10% by weight of a melamine resin, the latter being a melamine-formaldehyde condensate, having a mean degree of polymerization of from 1.2 to 6.0 and a melamine:formaldehyde ratio of from 1:2 to 1:5.5, which has been partially etherified with a C.sub.1 -C.sub.4 -alkanol so that the ratio melamine:ether radicals is from 1:1.5 to 1:5.0 and the ratio melamine:free methylol groups is from 1:0.5 to 1:3. The molding materials can be converted to moldings which can be used industrially at elevated ambient temperatures.

REFERENCES:
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patent: 3940365 (1976-02-01), Grossmann et al.
patent: 3960984 (1976-06-01), Kohan
patent: 3963668 (1976-06-01), Wurmb et al.
patent: 4139575 (1979-02-01), Amann et al.
patent: 4230606 (1980-10-01), Amann et al.
patent: 4342680 (1982-08-01), Sugio et al.

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