Phosphorus compounds as stabilizers

Details Phosphorus compounds as stabilizers Phosphorus compounds as stabilizers

2007-01-23

2007-01-23

Szekely, Peter (Department: 1714)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S154000

Reexamination Certificate

active

10480676

ABSTRACT:
The present invention relates to phosphorus compounds as stabilizers for polymers with respect to exposure to heat or mechanical stress during processing. In particular, even very small concentrations of from 25 to 350 ppm of bis(diphenylphosphino)-2,2-dimethylpropane are highly effective.

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“Kunststoff—Additive” [Plastics Additives]; Gachter & Muller, 3rdEd., pp. 42-50 (1990).

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