Claims for Patent: 10,487,175

Summary for Patent: 10,487,175

Title:	Use of alcohols containing at least two urethane groups for preparation of polyether polyols
Abstract:	The present invention relates to a process for preparing polyether polyols by adding alkylene oxides onto H-functional starter compounds, characterized in that at least one alcohol containing at least two urethane groups is used as H-functional starter compound. The invention further provides the polyether polyols containing a structural unit of the formula (IV) where R1 is linear or branched C2 to C24-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, preferably CH2—CH2 or CH2—CH(CH3), R2 is linear or branched C2 to C24-alkylene, C3 to C24-cycloalkylene, C4 to C24-arylene, C5 to C24-aralkylene, C2 to C24-alkenylene, C2 to C24-alkynylene, each of which may optionally by interrupted by heteroatoms such as O, S or N and/or may each be substituted by alkyl, aryl and/or hydroxyl, preferably C2 to CM alkylene, R3 is H, linear or branched C1 to C24-alkyl, C3 to C24-cycloalkyl, C4 to C24-aryl, C5 to C24-aralkyl, C2 to C24-alkenyl, C2 to C24-alkynyl, each of which may optionally be interrupted by heteroatoms such as O, S or N and/or each of which may be substituted by alkyl, aryl and/or hydroxyl, preferably H, R4, is H, linear or branched O to C24-alkyl, C24-cycloalkyl, C4 to C24-aryl, C5 to C24-aralkyl, C2 to C24-alkenyl, C2 to C24-alkynyl, each of which may be interrupted by heteroatoms such as O, S or N and/or each of which may be substituted by alkyl, aryl and/or hydroxyl, preferably H, IV is linear or branched C2 to C24-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, preferably CH2—CH2 or CH2—CH(CH3), and where R1 to R5 may be identical or different from one another, and the polyether polyols obtainable by the process according to the invention.
Inventor(s):	Jörg Hofmann, Urs Rauwald, Bert Klesczewski, Hartmut Nefzger
Assignee:	Covestro Deutschland AG
Application Number:	US15/573,875

Details for Patent 10,487,175

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Genentech, Inc.	TECENTRIQ	atezolizumab	Injection	761034	May 18, 2016		2036-05-19
Genentech, Inc.	TECENTRIQ	atezolizumab	Injection	761034	March 08, 2019		2036-05-19

International Patent Family for US Patent 10,487,175

Country	Patent Number	Estimated Expiration
World Intellectual Property Organization (WIPO)	2016188838
United States of America	2018312632
Spain	2873574
European Patent Office	3619253
European Patent Office	3098251
China	107636042