Oxidic silicon particle dispersion in polyol

Patent metadata

Field	Value
Publication number	US-11479635-B2
Application number	US-201816478588-A
Country	US
Kind code	B2
Filing date	Jan 25, 2018
Priority date	Jan 31, 2017
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A graft macromer, comprising the reaction product of at least one macromer being at least one molecule which comprises in its structure one or more hydroxyl-terminated polyether and/or polyester chains, with at least one grafting compound which comprises in its structure at least one at least monoalkoxylated or at least monohalogenated silyl group and at least one alkyl, cycloalkyl or aryl containing group which is reactive towards the hydroxyl group of the macromer, is used for dispersing e.g. SiO 2 in a polyol.

First claim

The invention claimed is:

1. A dispersion, comprising:
a graft macromer comprising
a reaction product of
at least one macromer which comprises in its structure one or more
hydroxyl-terminated polyether and/or polyester chains,
with
at least one grafting compound which comprises in its structure at least
one at least monoalkoxylated or at least monohalogenated silyl group
and at least one alkyl, cycloalkyl or aryl comprising group which is
reactive towards a hydroxyl group of the at least one macromer,

reacted with oxidic silicon particles selected from the group consisting of silicon dioxide, silicates, silicic acid and mixtures thereof, in at least one polyol, which is different from the graft macromer,
wherein the oxidic silicon particles have an arithmetic mean diameter (d) in a range of from 0.5 to 20 μm.

2. The dispersion of claim 1 , wherein the oxidic silicon particles have an arithmetic mean diameter (d) in a range of from 1 to 10 μm.

3. The dispersion of claim 1 , wherein the at least one polyol is selected from two- to eight-functional polyether polyols and/or polyester polyols having a molecular weight (Mn) of from 500 to 30000 g/mol.

4. The dispersion of claim 1 , wherein the oxidic silicon particles are selected from silicon dioxide particles and aluminium silicate particles.

5. The dispersion of claim 1 , wherein the at least one macromer is selected from two- to eight-functional polyether polyols and/or polyester polyols having a molecular weight (Mn) of from 500 to 30,000 g/mol.

6. The dispersion of claim 1 , wherein the at least one macromer has an OH-value of from 6 to 200 mg KOH/g macromer.

7. The dispersion of claim 1 , wherein the at least one grafting compound comprises in its structure at least one methoxy silyl or ethoxy silyl group or at least one chloro silyl group.

8. The dispersion of claim 1 , wherein the at least one grafting compound comprises in its structure at least one alkyl, cycloalkyl or aryl comprising isocyanate or epoxide group.

9. The dispersion of claim 8 , wherein the at least one grafting compound is a ((tri-C1-12-alkoxy)silyl)C1-12-alkyl isocyanate.

10. A process for preparing the dispersion of claim 1 , the process comprising reacting the graft macromer with the oxidic silicon particles in the at least one polyol.

11. The process of claim 10 , wherein the reaction is carried out at a temperature in a range of from 0 to 260° C.

12. The process of claim 10 , wherein the reaction is carried out in the presence of trans-esterification catalysts.

13. A process for preparing a polyurethane, the process comprising
mixing the dispersion of claim 1 with isocyanate and/or polyisocyanates having at least 1.7 isocyanate groups and,
optionally,
(a) one or more of further compounds having hydrogen atoms which are reactive towards isocyanates,
(b) chain extenders and/or crosslinkers,
(c) catalysts,
(d) blowing agents and/or additives other than (a), (b), (c) and (d), to obtain a mixture, and

reacting the mixture to form the polyurethane.

14. The process of claim 13 , wherein the polyurethane is a polyurethane foam and the mixture comprises blowing agents.

15. The process of claim 13 , wherein the polyurethane is a compact polyurethane material.

16. A polyurethane, obtainable by the process of claim 13 .

Assignees

• Basf Se

Inventors

• Thielbeer Frank
• Koenig Christian
• Doroodian Amir
• Lutter Heinz-Dieter
• Richter Sebastian
• Hadick Udo

Classifications

• C08G63/695

  containing silicon · CPC title

• C08G2101/00

  Manufacture of cellular products · CPC title

• C08G18/10 Primary

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• C08G18/3895 Primary

  Inorganic compounds, e.g. aqueous alkalimetalsilicate solutions; Organic derivatives thereof containing no direct silicon-carbon bonds · CPC title

• C08J9/04

  using blowing gases generated by a previously added blowing agent · CPC title