Synthetic-resin body support material

US4502234A · kind A · utility

Assignee

• Secans AG · CH

Inventors

• Helmut Schaefer · Pirmasens, DE
• Philipp Schaefer · Wattenscheid, DE

Key dates

• Filing date: Jul 28, 1982
• Grant date: Mar 5, 1985
• Expiry date: Jul 28, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249981
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A foamed material, which is adapting under pressure to the shape of parts, particularly of parts of the human body, but which on pressure relief again returns to a vast extent and after a certain restoring time into the original shape, consists of the following constituents: PA0 (a) substantially saturated liquid hydrocarbons; PA0 (b) unsaturated liquid hydrocarbons, preferably polybutadiene; PA0 (c) a reactive agent, preferably polyisocyanate, with which the unsaturated liquid hydrocarbons are reacted; PA0 (d) a cross-linking agent, for example ethylene hexane diol; PA0 (e) hollow microspheres, the thin shell of which consists of vinylidene chloride copolymer and the interior of which contains a gas. The production of such a foamed material is preferably such that the substantially saturated liquid hydrocarbons and the unsaturated hydrocarbons are intermixed, noting that particles consisting of a vinylidene chloride copolymer and containing an inflating agent are added to this mixture or to a constituent of this mixture, and noting that the mixture is, prior or after this addition, heated to a temperature between 92.degree. C. and 165.degree. C. and preferably 105.degree. C., so t…