公开(公告)号：US20180148534A1

公开(公告)日：2018-05-31

申请号：US15825680

申请日：2017-11-29

Applicant: LANXESS Solutions US Inc.

Inventor： Zhenya Zhu ,  Gerald King ,  George Brereton

IPC: C08G18/10 ,  C08G18/76 ,  C08G18/18 ,  C08J5/18

CPC classification number: C08G18/10 ,  C08G18/1816 ,  C08G18/4277 ,  C08G18/44 ,  C08G18/48 ,  C08G18/7614 ,  C08G18/7621 ,  C08J5/18 ,  C08J2375/04 ,  C08G18/2805 ,  C08G18/3243 ,  C08G18/3814

Abstract: Blocked isocyanate terminated prepolymers with improved handling and processing properties are prepared from isocyanate terminated prepolymers with very low free isocyanate monomer content. The blocked prepolymers have lower melting points and/or viscosities compared to similar blocked isocyanate terminated having traditional, higher amounts of free isocyanate monomer. Curing compositions comprising the blocked prepolymers are prepared and cured to form polyurethane polymers with excellent properties.

公开(公告)号：US20180016378A1

公开(公告)日：2018-01-18

申请号：US15648001

申请日：2017-07-12

Applicant: LANXESS SOLUTIONS US INC.

Inventor： Zhenya Zhu ,  George Brereton

IPC: C08G18/10 ,  C08G18/76 ,  C08G18/48

CPC classification number: C08G18/10 ,  C08G18/0852 ,  C08G18/12 ,  C08G18/4202 ,  C08G18/4277 ,  C08G18/4808 ,  C08G18/4825 ,  C08G18/4854 ,  C08G18/7614 ,  C08G18/3206

Abstract: Co-distilling a mixture of para-phenylene diisocyanate (PPDI) and solvent, collecting the mixture of solvent and PPDI as a solution, reacting this solution with a polyol to form a prepolymer, and then removing unreacted PPDI by distillation in the presence of one or more solvents provides lower color prepolymer and higher quality polyurethane resin than a similar process that omits the co-distillation of PPDI and solvent prior to reaction with the polyol.

公开(公告)号：US20180016382A1

公开(公告)日：2018-01-18

申请号：US15649746

申请日：2017-07-14

Applicant: LANXESS SOLUTIONS US INC.

Inventor： Zhenya Zhu ,  Gerald King ,  George Brereton

IPC: C08G18/44 ,  C08G18/10 ,  C08G18/42 ,  C08G85/00

CPC classification number: C08G18/44 ,  C08G18/10 ,  C08G18/12 ,  C08G18/4202 ,  C08G18/4286 ,  C08G18/73 ,  C08G18/7614 ,  C08G85/002 ,  C08G18/3215 ,  C08G18/3814

Abstract: Polycarbonate based polyurethane prepolymers having a low amount of free isocyanate monomer with excellent handling and processing properties are prepared and used in the preparation of cast polyurethane polymers with excellent performance and handling properties.