公开(公告)号：US20250136838A1

公开(公告)日：2025-05-01

申请号：US18834678

申请日：2023-01-27

Applicant: PRC-Desoto International, Inc.

Inventor： Razmik Boghossian ,  James Smith ,  Laxman Gurung ,  Renhe Lin

IPC: C09D175/12 ,  C08G18/12 ,  C08G18/32

Abstract: Isocyanate-functional polyurethane prepolymers are prepared by reacting a polymeric diol, a non-linear short chain diol, a multifunctional polyol, and a diisocyanate. Coating compositions comprising the isocyanate-functional polyurethane prepolymers and a polyamine curing agent can be used to prepare topcoats that meet the demanding performance requirements of aerospace and other applications.

公开(公告)号：US11807707B2

公开(公告)日：2023-11-07

申请号：US17499042

申请日：2021-10-12

Applicant: PRC-DeSoto International, Inc.

Inventor： Razmik Boghossian ,  James Smith

IPC: C08G18/10 ,  C08G18/48 ,  C08G18/44 ,  C08G18/32 ,  C08G18/42 ,  C08G18/76 ,  C09D175/02 ,  C08G18/66 ,  C08G18/75 ,  C08G18/12

CPC classification number: C08G18/3206 ,  C08G18/10 ,  C08G18/12 ,  C08G18/3212 ,  C08G18/42 ,  C08G18/44 ,  C08G18/4825 ,  C08G18/4854 ,  C08G18/664 ,  C08G18/6674 ,  C08G18/758 ,  C08G18/7671 ,  C09D175/02 ,  C08G18/10 ,  C08G18/3234

Abstract: Polyurethane prepolymers having non-linear short chain diols and/or soft diisocyanates incorporated into the backbone are used to provide cured polyurethane coatings having a high hard segment content and low haze. The polyurethane prepolymers can also be used to improve the dispersion of filler in cured polyurethane compositions having a high filler loading. Cured coatings prepared from the two-part polyurethane systems meet the requirements for aerospace applications.

公开(公告)号：US11098222B2

公开(公告)日：2021-08-24

申请号：US16026083

申请日：2018-07-03

Applicant: PRC-DeSoto International, Inc.

Inventor： Razmik Boghossian ,  James Smith

IPC: C09D175/02 ,  C09D181/02 ,  C08G18/77 ,  C08G75/045

Abstract: Isocyanate-terminated chain-extended polythioether prepolymers, compositions thereof, and methods of use thereof are disclosed. The isocyanate-terminated chain-extended polythioether prepolymers are useful in sprayable coatings and sealants and especially sprayable coatings and sealants having a high filler content.

公开(公告)号：US11180604B2

公开(公告)日：2021-11-23

申请号：US15384346

申请日：2016-12-20

Applicant: PRC-DeSoto International, Inc.

Inventor： Razmik Boghossian ,  James Smith

IPC: C08G18/12 ,  C08G18/32 ,  C08G18/10 ,  C08G18/42 ,  C08G18/76 ,  C08G18/48 ,  C08G18/44 ,  C09D175/02 ,  C08G18/66 ,  C08G18/75

Abstract: Polyurethane prepolymers having non-linear short chain diols and/or soft diisocyanates incorporated into the backbone are used to provide cured polyurethane coatings having a high hard segment content and low haze. The polyurethane prepolymers can also be used to improve the dispersion of filler in cured polyurethane compositions having a high filler loading. Cured coatings prepared from the two-part polyurethane systems meet the requirements for aerospace applications.