Multi-component systems for preparing foamed products

Patent metadata

Field	Value
Publication number	US-12492293-B2
Application number	US-201917299352-A
Country	US
Kind code	B2
Filing date	Dec 2, 2019
Priority date	Dec 4, 2018
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

Foamed products are produced using multi-component systems which are advantageously free of isocyanate. The components of the systems are combined, with the resulting mixture then undergoing curing and foaming to provide a foamed product, wherein the characteristics of the foamed product may be varied by selecting particular reactants to be present in the multi-component system. The systems employ at least one (meth)acrylate compound having two or more (meth)acrylate functional groups per molecule, at least one thiol compound having two or more thiol functional groups per molecule, at least one free radical initiator, at least one blowing agent, at least one surfactant, and optionally at least one promoter for the free radical initiator.

First claim

What is claimed is:

1 . A multi-component system for preparing a foamed product, comprising:
a) a first component comprised of at least one acrylate compound having two or more acrylate functional groups per molecule; and b) a second component comprised of at least one thiol compound having two or more thiol functional groups per molecule; wherein at least one free radical initiator is present in at least one of the first component or the second component, at least one surfactant is present in at least one of the first component or the second component, and at least one blowing agent is present in at least one of the first component or the second component; wherein in the event the multi-component system has a molar ratio of thiol functional groups to acrylate functional groups of 0.5:1 or greater and the at least one free radical initiator includes at least one organic peroxide, the multi-component system additionally comprises at least one promoter for the at least one organic peroxide, wherein the at least one free radical initiator and the at least one promoter for the at least one free radical initiator are present in different components, and wherein the multi-component system comprises a total of from 50 to 85 weight percent acrylate compound(s) based on the total weight of the multi-component system.

2 . The multi-component system of claim 1 , wherein the multi-component system has a molar ratio of thiol functional groups to acrylate functional groups of 0.4:1 or less.

3 . The multi-component system of claim 2 , wherein the multi-component system comprises at least one promoter for the at least one free radical initiator and the at least one free radical initiator and the at least one promoter for the at least one free radical initiator are present in different components.

4 . The multi-component system of claim 1 , wherein the first component is comprised of at least one acrylate compound having two or more acrylate functional groups per molecule and a number average molecular weight of up to 1000 daltons.

5 . The multi-component system of claim 1 , wherein the first component is comprised of at least one acrylate compound selected from the group consisting of dipropylene glycol diacrylate and tricyclodecane dimethanol diacrylate.

6 . The multi-component system of claim 1 , wherein the second component is comprised of at least one thiol compound having two or more aliphatic thiol functional groups per molecule.

7 . The multi-component system of claim 1 , wherein the second component is comprised of at least one thiol compound having three or more aliphatic thiol functional groups per molecule.

8 . The multi-component system of claim 1 , wherein the second component is comprised of at least one thiol compound which is a 2-mercaptoacetate, 3-mercaptopropionate ester or 3-mercaptobuyrate ester of a polyalcohol containing two or more hydroxyl groups per molecule.

9 . The multi-component system of claim 1 , wherein the at least one free radical initiator includes at least one free radical initiator selected from the group consisting of azo compounds, organic peroxides, hydroperoxides, perketals, peresters, peroxydicarbonates, and peracids.

10 . The multi-component system of claim 1 , wherein the at least one surfactant includes at least one silicon-containing surfactant.

11 . The multi-component system of claim 1 , wherein the at least one blowing agent includes at least one physical blowing agent.

12 . The multi-component system of claim 1 , comprising a total of from 5 to 20 weight percent thiol compound based on the total weight of the multi-component system.

13 . A multi-component system for preparing a foamed product, comprising:
a) a first component comprised of at least one acrylate compound having two or more acrylate functional groups per molecule, at least one thiol compound having two or more thiol functional groups per molecule, at least one promoter, and at least one stabilizer; and b) a second component comprised of at least one free radical initiator; wherein the at least one promoter is a promoter for the at least one free radical initiator, at least one surfactant is present in at least one of the first component or the second component, and at least one blowing agent is present in at least one of the first component or the second component, and wherein the multi-component system comprises a total of from 50 to 85 weight percent acrylate compound(s) based on the total weight of the multi-component system.

14 . The multi-component system of claim 13 , wherein the multi-component system has a molar ratio of thiol functional groups to (meth)acrylate functional groups of 0.4:1 or less.

15 . The multi-component system of claim 13 , wherein the at least one promoter includes at least one promoter which is a salt or complex of a metal selected from the group consisting of Li, Al, Mg, Co, Fe, Cu, Zn, Ni, Mn, Cr, Sn, Au, Pd, V and Pt.

16 . The multi-component system of claim 13 , wherein the at least one stabilizer includes at least one stabilizer selected from the group consisting of phenolic compounds; phosphonic acid compounds; phosphite compounds; hydroquinones; hydroxylamine salts; organic acids; dialkyl polysulfides; and combinations thereof.

17 . A method of making an article comprised of a foamed product, the method comprising combining the first component and the second component of the multi-component system of claim 1 to obtain a mixture and contacting the mixture with at least one substrate.

Assignees

• Arkema France

Inventors

• Weinert Zackariah J
• Scholte Jon
• Bailey Michael A
• Orilall Mahendra C

Classifications

• C08L81/02

  Polythioethers; Polythioether-ethers · CPC title

• C08J2483/04

  Polysiloxanes · CPC title

• C08J2381/02

  Polythioethers; Polythioether-ethers · CPC title

• C08J2203/14

  Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons · CPC title

• C08J9/0061

  characterized by the use of several polymeric components · CPC title