Method for recycling discolored polyolefins

Details Method for recycling discolored polyolefins Method for recycling discolored polyolefins

1990-07-31

1992-09-22

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

525259, 525379, 521 47, C08F 832

Patent

active

051497743

ABSTRACT:
Polyolefins, especially those containing a phenolic antioxidant, are prone to discoloration upon improper processing at elevated temperatures or upon prolonged aging. Such discolored polyolefins can be reclaimed and recycled as essentially non-colored useful polymers by the addition thereto of a hydroxylamine of the formula

REFERENCES:
patent: 3310541 (1967-03-01), Breuers et al.
patent: 4590231 (1986-05-01), Seltzer et al.
patent: 4876300 (1989-10-01), Seltzer et al.

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