公开(公告)号：US20220010060A1

公开(公告)日：2022-01-13

申请号：US17413030

申请日：2019-12-12

Applicant: King Abdullah University of Science and Technology

Inventor： Xiaoshuang FENG ,  Naganath PATIL ,  Senthil BOOPATHI ,  Yves GNANOU ,  Nikos HADJICHRISTIDIS

IPC: C08G64/34 ,  C08J11/02

Abstract: Embodiments of the present disclosure describe polymerization systems for the synthesis of polycarbonate polyols, methods of synthesizing polycarbonate polyols using the polymerization systems, methods of recovering initiators and/or activators for use or re-use in the synthesis of polycarbonate polyol, and the like. The polymerization systems can comprise an initiator including a mono- or multi-functional carboxylate or carbonate salt having an organic cation as a counter-ion; an optional co-initiator including a mono- or multi-functional protic compound selected from acids, alcohols, water, and combinations thereof; and an activator including a borane compound selected from alkyl boranes and aryl boranes; wherein the activator and one or more of the initiator and co-initiator associate to form an ate complex.

公开(公告)号：US20210309801A1

公开(公告)日：2021-10-07

申请号：US17203931

申请日：2021-03-17

Applicant: King Abdullah University of Science and Technology

Inventor： Xiaoshuang FENG ,  Jobi VARGHESE ,  Yves GNANOU ,  Nikos HADJICHRISTIDIS ,  Mingchen JIA ,  Dhanya AUGUSTINE

IPC: C08G65/10 ,  C08F293/00

Abstract: Degradable ethylene oxide-based copolymers, including random, tapering, and block copolymers are described. For example, the present disclosure describes materials and methods for synthesizing degradable hydrophilic ethylene oxide-based copolymers, degradable amphiphilic ethylene oxide-based block copolymers, degradable hydrophobic polyethers and degradable functionalized polyethers via boron-activated copolymerization of ethylene oxide monomers with carbon dioxide.

公开(公告)号：US20190390007A1

公开(公告)日：2019-12-26

申请号：US16555052

申请日：2019-08-29

Applicant: King Abdullah University of Science and Technology

Inventor： Yves GNANOU ,  Xiaoshuang FENG ,  Dongyue ZHANG ,  Yahya ALZAHRANY ,  Senthil BOOPATHI ,  Nikolaos HADJICHRISTIDIS

IPC: C08G64/34 ,  C08G64/32 ,  C08G81/00 ,  C08K5/057 ,  C08K5/19 ,  C08K5/53 ,  C08K5/5399

Abstract: Embodiments of the present disclosure describe initiating systems comprising an activator and an initiator, wherein the activator includes an alkyl borane or alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen. Embodiments of the present disclosure further describe methods of making a polycarbonate comprising contacting a cyclic monomer and carbon dioxide in the presence of an activator and an initiator to form a polycarbonate, wherein the catalyst is one or more of an alkyl borane and alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen.