Method of producing thermoplastic synthetic resin compositions with reduced diffusion coefficients

US6066695A · kind A · utility

Assignee

• Roth Werke GmbH · DE

Inventors

• Manfred Roth · Munich, DE
• Jurgen Dreier · Marburg, DE

Key dates

• Filing date: Aug 25, 1998
• Grant date: May 23, 2000
• Expiry date: Aug 25, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L63/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A thermoplastic synthetic resin, especially high-density polyethylene, has its diffusion coefficient especially for hydrocarbons, reduced by the addition of 2 to 8% by weight of an additive consisting essentially of at least one phenoxy and/or epoxy resin, and at least one further component selected from the group which consists of at least one radical forming agent and at least one graft coploymerization catalyst, and optional quantities of an antioxidant selected from the group which consists of at least one phenolic antioxidant, at least one phosphitic antioxidant and mixtures thereof, at least one organosilane ester, at least one UV stabilizer, at least one antistatic composition, and polypropylene.