Patent · US Expired

Method of strengthening geological formations

US4715746A · kind A · utility

21Cited by

10References

8Claims

0Family size

Assignees

Bergwerksverband GmbH · DE
BAYER HEALTHCARE LLC · DE

Inventors

Max Mann · Odenthal, DE
Manfred Kapps · Bensberg, DE

Key dates

Filing date	Apr 15, 1987
Grant date	Dec 29, 1987
Priority date	—
Expiry date	Apr 15, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S507/926
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a method of strengthening geological formations in underground workings or mines by introducing reaction mixtures containing a polyisocyanate component (a), a polyol component (b) and optionally auxiliary agents and additives (c) into the formation which is required to be strengthened and reacting the mixtures to form polyurethanes, wherein polyol component (b) contains mixtures of (i) organic polyhydroxyl compounds having a hydroxyl number of about 100 to 800 and (ii) monovalent alcohols having a molecular weight of 32 to about 600, component (ii) being present in an amount of about 0.01 to 20% by weight, based on the total quantity of component (b).

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