Processing a graft polymer or elastomer

US4117063A · kind A · utility

Assignee

• Kabel- und Metallwerke Gutehoffnungshutte AG · DE

Inventors

• Hermann Uwe Voigt · Langenhagen, DE
• Martin Volker · Worms, DE
• Hans Peter Stehmann · Fuhrberg, DE

Key dates

• Filing date: Dec 22, 1975
• Grant date: Sep 26, 1978
• Expiry date: Dec 22, 1995

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2301/10
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A cross-linking polyolefine, preferably a polyethylene powder is mixed with a silane solution (containing additives, such as a graft initiator, activator and anti-oxidant) and heated while worked, so that the wetted powder melts. The silane solution can also be blended into the melting powder. Grafting occurs in the melt and the stream of molten material is then degassed, while still warm in the final work shaping device, e.g. an extruder jacketing a conductor. The resulting product (to the extent it consists of the said material) will then cross-link.