Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1988-07-19
1989-11-14
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
252511, 264105, B29C 3508
Patent
active
048805777
ABSTRACT:
A process for producing a self-restoring overcurrent protective device by the grafting method, wherein an organic peroxide is added to colloidal graphite, at least one kind of carbon black selected from among acetylene black, Ketjen black and furnace black having a high structure, and at least one kind of crystalline polyner substance while heating and milling the latter three components, and the heated mixture having a high viscosity is forcibly milled, whereby the organic peroxide is reacted with the polymer substance to give unpaired electrons to the polymer substance to thereby form polymer radicals. Subsequently, the formed polymer radicals are preferentially grafted onto the above-mentioned graphite and carbon black to form a milled mass wherein the grafting products are homogeneously dispersed in the above-mentioned polymer substance. The milled mass is molded into a predetermined shape while it still retains thermoplasticity. Subsequently, the above-mentioned organic peroxide not involved in the formation of the above-mentioned polymer radicals is thermally decomposed to crosslink the above-mentioned grafting products and polymer substance, whereby a molding having a three-dimensional network structure is obtained.
REFERENCES:
patent: 3914363 (1975-10-01), Bedard et al.
patent: 4237441 (1980-12-01), van Konynenburg et al.
patent: 4318881 (1982-03-01), Sopory
patent: 4511445 (1986-04-01), Forrest et al.
patent: 4514620 (1985-04-01), Cheng et al.
patent: 4775500 (1988-10-01), Funakoshi et al.
"Carbon Black Graft Polymer Having Network Structure", Journal of the Soc. of Rubber Industry, Okita et al., vol. 44, No. 1, pp. 63-68, 1971.
Abe Toshiaki
Kiriyama Masaru
Okita Kumakazu
Daito Communication Apparatus Co. Ltd.
Nilles James E.
Thurlow Jeffery
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