公开(公告)号：US20240174861A1

公开(公告)日：2024-05-30

申请号：US18432603

申请日：2024-02-05

Applicant: MCPU Polymer Engineering LLC

Inventor： Thomas M. GARRETT ,  Swarup Kumar MAITI

IPC: C08L97/00 ,  C07G1/00 ,  C08G18/12 ,  C08G18/18 ,  C08G18/42 ,  C08G18/48 ,  C08G18/64 ,  C08G18/76 ,  C08H7/00 ,  C08J9/14 ,  C08K3/22 ,  C08K3/30 ,  C08K3/32 ,  C08K5/00 ,  C08K5/521 ,  C08G101/00

CPC classification number: C08L97/005 ,  C07G1/00 ,  C08G18/12 ,  C08G18/18 ,  C08G18/4208 ,  C08G18/4837 ,  C08G18/6492 ,  C08G18/7657 ,  C08H6/00 ,  C08J9/141 ,  C08K3/22 ,  C08K3/30 ,  C08K3/32 ,  C08K5/0066 ,  C08K5/521 ,  C08G2101/00 ,  C08G2110/0025 ,  C08J2201/026 ,  C08J2203/14 ,  C08J2205/10 ,  C08J2375/06 ,  C08J2375/12 ,  C08K2003/2248 ,  C08K2003/3045 ,  C08K2003/321

Abstract: Modified lignin products, processes for making them, and their use to produce rigid polyurethane or polyisocyanurate foams are disclosed. The processes comprise heating a lignin source with a nitrogen source and a starved concentration of a C1-C5 aldehyde to give a reaction mixture comprising a Mannich condensation product, neutralizing the reaction mixture, and isolating the modified lignin product. The process is performed at a mass ratio of lignin source to nitrogen source within the range of 1:1 to 1:5 and at a molar ratio of nitrogen source to C1-C5 aldehyde within the range of 3.5:1 to 1:1. Polyol blends and performance additives that contain the modified lignin products are described. Rigid foams that process well and incorporate up to 60 wt. %, based on the amount of polyol component, of the modified lignin contribute to excellent flame retardancy and low-temperature R-value performance.

公开(公告)号：US20230025729A1

公开(公告)日：2023-01-26

申请号：US17385000

申请日：2021-07-26

Applicant: MCPU POLYMER ENGINEERING LLC

Inventor： Thomas M. GARRETT ,  Swarup Kumar MAITI

IPC: C08L97/00 ,  C08K5/21 ,  C08K3/22 ,  C08K5/07 ,  C08K5/00 ,  C08K5/521 ,  C08K3/30 ,  C08K3/32 ,  C08G18/12 ,  C08G18/42 ,  C08G18/48 ,  C08G18/64 ,  C08G18/76 ,  C08G18/18 ,  C08J9/14

Abstract: Modified lignin products, processes for making them, and their use to produce rigid polyurethane or polyisocyanurate foams are disclosed. The processes comprise heating a lignin source with a nitrogen source and a starved concentration of a C1-C5 aldehyde to give a reaction mixture comprising a Mannich condensation product, neutralizing the reaction mixture, and isolating the modified lignin product. The process is performed at a mass ratio of lignin source to nitrogen source within the range of 1:1 to 1:5 and at a molar ratio of nitrogen source to C1-C5 aldehyde within the range of 3.5:1 to 1:1. Polyol blends and performance additives that contain the modified lignin products are described. Rigid foams that process well and incorporate up to 60 wt.%, based on the amount of polyol component, of the modified lignin contribute to excellent flame retardancy and low-temperature R-value performance.