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:
Jul. 08, 2025
Filed:
Dec. 13, 2019
Wacker Chemie Ag, Munich, DE;
Volker Stanjek, Ampfing, DE;
Lars Zander, Altötting, DE;
Wacker Chemie AG, Munich, DE;
Abstract
A process for preparing silane-terminated polymers (SP) of the formula (I),Y—[O—C(═O)—NH—(CR)—SiR(OR)] (I),includes in a 1process step at least one polymer (OHP) of the formula (II),Y—[OH] (II),being reacted with at least one isocyanate-functional silane (IS) of the formula (III),O═C═N—(CR)—SiR(OR) (III),with the proviso that the isocyanate-functional silanes (IS) are used in an amount such that there are at least 1.05 isocyanate groups in the silanes (IS) to each hydroxyl group in the compounds (OHP). Subsequently, in a 2process step, the unreacted isocyanate groups of the silanes (IS) are reacted, in the reaction mixture obtained in the 1process step, with at least one alcohol (A) of the formula (IV),ROH (IV)Subsequently, in a 3process step, the reaction mixture obtained in the 2process step is passed through an evaporation unit (VD).