Patent · US Expired

Method for cleaning apparatus for fabricating reactive multiple-component mixtures containing isocyanate

US4799967A · kind A · utility

1Cited by

5References

8Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Jorg Hausdorf · Fürth, DE
Joachim Kandler · Lechenich, DE
Volker Siekermann · Fürth, DE

Key dates

Filing date	Dec 16, 1987
Grant date	Jan 24, 1989
Priority date	—
Expiry date	Dec 16, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D7/5009
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Disclosed is a cleaning agent and method for the cleaning of apparatus used for the fabrication of reactive, multiple-component mixtures containing isocyanate. The cleaning agent consists of 50 to 75 weight-percent of a plasticizer from the group of short to medium chain length phthalic acid esters or alkylsulfonic acid esters of phenols, and 50 to 25 weight-percent of a mineral oil fraction of an aliphatic, naphthenic and/or aromatic hydrocarbon, or mixtures thereof, in the range of from 8 to 17 carbon atoms.

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