Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1980-12-04
1982-08-03
Hamrock, William F.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525263, 525265, 525324, 5253338, C08F 806
Patent
active
043428444
ABSTRACT:
A process for the preparation of an organic peroxide master batch comprising about 20-60% by weight of an organic peroxide and about 40-80% by weight of a polymer capable of being cross-linked by the peroxide, is disclosed. The process comprises contacting particles of such a polymer, having a diameter from about 200 microns to about 20 millimeters, at a temperature from about 15.degree. C. to about 95.degree. C., with a liquid medium which is not a physically stable emulsion and which comprises from about 2 to about 100 percent, by weight, of a peroxide which is a liquid at said temperature and from about 0 to about 98 percent, by weight, of a suitable liquid in which the peroxide and the polymer are insoluble, for a period of time sufficient to incorporate from about 20 to about 60 percent of peroxide in the polymer particles, based on the total weight of the polymer particles containing the peroxide, said medium being present in such an amount that after the incorporation of the peroxide essentially all of the polymer particles are completely surrounded by the liquid medium.
REFERENCES:
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patent: 3923947 (1975-12-01), Cook
patent: 4006283 (1977-02-01), MacKenzie et al.
patent: 4243773 (1981-01-01), Arnaud et al.
patent: 4278777 (1981-07-01), Jakabhazy et al.
Drost Gerrit F.
Torenbeek Reinder
van Drumpt Jan D.
Akzona Incorporated
Green Robert F.
Hamrock William F.
Young Francis W.
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