Method of and composition for manufacturing an object of cross-l

Details Method of and composition for manufacturing an object of cross-l Method of and composition for manufacturing an object of cross-l

1975-09-04

1978-08-15

Derrington, James H.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

260 37P, 260 4221, 260764, 264 78, 264174, 264236, 264325, 264328, 264347, C08K 500

Patent

active

041072456

ABSTRACT:
An object of cross-linked polymer, such as insulation for a cable conductor or a cable sheath, is formed by using a starting material containing a peroxide and a polymer material with the ability to undergo a cross-linking reaction in the presence of peroxide. The reaction is carried out during at least a part of the process in the presence of a substance which has the ability to undergo a color change during the cross-linking reaction of the polymer material so that a color change of the substance is obtained. There may also be added a dye which does not have the ability to undergo a color change during the cross-linking of the polymer material. The substance may be an aromatic compound containing at least one halogen atom and/or at least one heterocyclic ring in which ring there is at least one nitrogen atom to which no hydrogen atom is linked.

REFERENCES:
patent: 2084399 (1937-06-01), Kuettel
patent: 2500023 (1950-05-01), Burk
patent: 3030329 (1962-04-01), Warnsdorfer
patent: 3773706 (1973-11-01), Dunn
patent: 3891597 (1975-06-01), Needham
patent: 3931097 (1976-01-01), Fujio et al.

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