Method for increasing brightness in pulp paper and polymeric mat

Details Method for increasing brightness in pulp paper and polymeric mat Method for increasing brightness in pulp paper and polymeric mat

1997-10-08

2000-02-29

Buttner, David

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

1621645, 162177, 525408, 527300, 528360, 536 59, 560147, D21H 1709

Patent

active

060304952

ABSTRACT:
Novel substantially odor-free polymeric thiol-containing antioxidant compounds suitable for preventing light induced brightness reversion or yellowing of pulps and papers and polymeric materials are described. The novel compounds are based on a polymeric backbone having thiolactate or thioglycolate groups grafted onto the ends thereof and are soluble in water or alcohol.

REFERENCES:
patent: 4066392 (1978-01-01), Abel
Cole "Bleaching and Brightness Stabilization of High Yield Pulps" Tappi Journal Nov. 1987 pp. 117-122.

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