The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1987
Filed:
Dec. 05, 1985
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A solvent-containing composition for the cleaning of equipment used to mix and handle reactive multicomponent mixtures of high viscosity, which react to form polymers. In order to improve the capacity of the solvent to dissolve the more or less polymerized mixtures, the solvent contains a chain-terminating agent. For binary systems containing liquid polysulfide polymers, the solvent contains a chain-terminating agent or chain-degrading agent containing mercapto group-containing compounds of the general formula R--SH or disulfide or polysulfide group-containing compounds of the general formula R--S.sub.n --R, in which formulas n.gtoreq.2 and R represents equal or difficult alkyl residues, aryl residues or substituted alkyl or aryl residues. For binary polyurethane systems, the solvent contains chain-terminating compounds which in their molecule contain a Zerewitinoff-active hydrogen atom and have the general formula HY--R.sup.1, wherein ##STR1## where R.sup.2 =H or alkyl and R.sup.1 is an organic radical which will not enter into polyaddition or polycondensation reactions with itself or with isocyanate groups.