Patent · US Expired

Hollow body suitable for receiving diffusible substances, coated with resin varnish, and a process for its production and its use

US4364980A · kind A · utility

2Cited by

8References

13Claims

0Family size

Assignees

Daimler-Benz AG · DE
Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

Manfred Mass · Remscheid, DE
Gunter Walter · Metzingen, DE

Key dates

Filing date	Mar 11, 1981
Grant date	Dec 21, 1982
Priority date	—
Expiry date	Mar 11, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31587
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention comprises a hollow body, suitable for receiving diffusible substances and made of plastics material coated with varnish resins, the external surface of which has a roughness, measured in profile according to DIN 4768, Part I, of Rz=from 2 to 150 .mu.m and R.sub.max =from 5 to 250 .mu.m on which a coating, positively linked with that surface to provide a seal against diffusion of liquids and gases present in the body, consisting of a chemically crosslinked polyurethane resin is located in a layer thickness of from 10 to 800 .mu.m.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.