Method for bleaching tackifying resins

Details Method for bleaching tackifying resins Method for bleaching tackifying resins

1991-05-17

1994-06-14

Lipman, Bernard

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525313, 5253328, 5253329, 5253331, 5253334, 5253333, 525356, 5253337, 5253341, C08F 822, 525

Patent

active

053210921

ABSTRACT:
A method for bleaching hydrocarbon tackifier resins which comprises adding a bleaching agent to a molten resin and recovering a bleached hydrocarbon tackifier resin. The bleaching agent comprises from about 0.04 wt.% to about 0.06 wt.%, based on the weight of the reaction mixture, of an iodine supplying compound and from about 2.0 wt.% to about 10.0 wt.%, based on the weight of the reaction mixture, of an activating terpene compound. The iodine supplying compound is selected from the group consisting of elemental iodine and hydrogen iodide. The activating compound is selected from the group consisting of .alpha.-terpinene, .gamma.-terpinene, d-limonene, 1,4-cyclohexadiene and abietic acid.

REFERENCES:
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patent: 3671630 (1972-06-01), Carroll et al.
patent: 4107420 (1978-08-01), Schluenz et al.
patent: 4131556 (1978-12-01), Klopotek et al.
patent: 4222954 (1980-09-01), Cuscurida et al.
patent: 4879351 (1989-11-01), Schluenz

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