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:
Dec. 21, 2021
Filed:
Jan. 31, 2018
Wacker Chemie Ag, Munich, DE;
Michael Stepp, Ueberackern, AT;
Birgit Peschanel, Burghausen, DE;
WACKER CHEMIE AG, Munich, DE;
Abstract
Urea-functional organopolysiloxanes containing units of the formulaRSiO  (I),where R is a radical Ror a radical —ORor a radical Q, Q is a urea-functional radical of the formula—R—[NR—R—]NRR  (II),where the radicals Rare identical or different and are each a radical R' or a radical R, where R′ is hydrogen or a monovalent C-C-hydrocarbon radical where Ris radical of the formula —C(═O)—NH, and where at least one urea-functional radical Q having a radical Ris present per molecule are prepared by reacting amino-functional organopolysiloxanes comprising units of the formulaR′SiO  (IV),where A is an amino-functional radical of the formula—R—[NR′—R—]NR′R  (V),with the proviso that at least one amino-functional radical A is present per molecule in the organopolysiloxanes made up of units of the formula (III),with ortho-substituted aryl carbamates of the formulaR—Ar—O—C(═O)—NH  (VI),where Ar is an ortho-substituted aryl radical.