Polymer polyols comprising amine based polyether polyols and a process for preparing these polymer polyols

Patent metadata

Field	Value
Publication number	US-2018201730-A1
Application number	US-201715406828-A
Country	US
Kind code	A1
Filing date	Jan 16, 2017
Priority date	Jan 16, 2017
Publication date	Jul 19, 2018
Grant date	—

Abstract

This invention relates to polymer polyols which comprise one or more base polyols, at least one preformed stabilizer, one or more ethylenically unsaturated monomers, and, in the presence of at least one free radical polymerization catalyst, and optionally, one or more polymer control agents. The base polyol of these polymer polyols comprises one or more amine initiated polyols. The present invention also relates to processes for preparing these polymer polyols, to foams prepared from these polymer polyols, and to processes for producing foams from these polymer polyols.

First claim

What is claimed is:

1 . A polymer polyol comprising the free-radical polymerization product of:
(a) one or more base polyols comprising (1) one or more amine initiated polyols wherein the amine initiator is free of tertiary amine groups and said amine initiated polyols have an equivalent weight of less than 500; (b) at least one preformed stabilizer; (c) one or more ethylenically unsaturated monomers;
in the presence of
(d) at least one free radical polymerization catalyst;

and, optionally,
(e) one or more polymer control agents.

2 . The polymer polyol of claim 1 , wherein (a) said one or more base polyols comprises (1) one or more amine initiated polyols wherein the amine initiator is free of tertiary amine groups, and (2) one or more hydroxyl initiated polyols having a functionality of from about 2 to about 8 and a hydroxyl number of from about 10 to about 1000, wherein said hydroxyl initiated polyols are selected from the group consisting of polyether polyols, polyester polyols, polyetherester polyols and mixtures thereof.

3 . The polymer polyol of claim 1 , wherein the resultant polymer polyol has a viscosity≤V b e 4.2×
wherein:
V b =viscosity of the base polyol in millipascal·second (mPa·s);
and
X=the weight % of solids in the polymer polyol/(100−the weight % of solids in the polymer polyol).

4 . The polymer polyol of claim 1 , wherein (c) said ethylenically unsaturated monomers comprise styrene and acrylonitrile.

5 . The polymer polyol of claim 1 , wherein (a) said one or more base polyols comprise (1) one or more amine initiated polyols having a functionality of about 2 to about 8 and an equivalent weight ranging from about 75 to about 400.

6 . The polymer polyol of claim 4 , wherein styrene and acrylonitrile are present in a weight ratio of from 80:20 to 20:80.

7 . The polymer polyol of claim 1 , wherein the solids content of said polymer polyols ranges from about 15% by weight up to about 75% by weight.

8 . The polymer polyol of claim 1 , wherein (e) a polymer control agent comprising isopropanol is present.

9 . The polymer polyol of claim 1 , wherein (d) said free radical polymerization catalyst is selected from the group consisting of peroxides, azo compounds and mixtures thereof.

10 . A process for the preparation of a polymer polyol comprising
(I) free-radically polymerizing:
(a) one or more base polyols comprising (1) one or more amine initiated polyols wherein the amine initiator is free of tertiary amine group and said amine initiated polyols have an equivalent weight of less than 500;
(b) at least one preformed stabilizer;
(c) one or more ethylenically unsaturated monomers;
in the presence of
(d) at least one free radical polymerization catalyst;
and, optionally,
(e) one or more polymer control agents.

11 . The process of claim 10 , wherein (a) said one or more base polyols comprises (1) one or more amine initiated polyols wherein the amine initiator is free of tertiary amine groups, and (2) one or more hydroxyl initiated polyols having a functionality of from about 2 to about 8 and a hydroxyl number of from about 10 to about 1000, wherein said hydroxyl initiated polyols are selected from the group consisting of polyether polyols, polyester polyols, polyetherester polyols and mixtures thereof.

12 . The process of claim 10 , wherein the resultant polymer polyol has a viscosity ≤V b e 4.2× wherein:
V b =the viscosity of the base polyol in millipascal·second (mPa·s)
and
X=the weight % of solids in the polymer polyol/(100−the weight % of solids in the polymer polyol).

13 . The process of claim 10 , wherein (c) said ethylenically unsaturated monomers comprise styrene and acrylonitrile.

14 . The process of claim 10 , wherein (a) said one or more base polyols comprise (1) one or more amine initiated polyether polyols having a functionality of about 2 to about 8 and an equivalent weight ranging from about 75 to about 400.

15 . The process of claim 13 , wherein styrene and acrylonitrile are present in a weight ratio of from 80:20 to 20:80.

16 . The process of claim 10 , wherein the solids content of said polymer polyols ranges from about 15% by weight up to about 75% by weight.

17 . The process of claim 10 , wherein (e) a polymer control agent comprising isopropanol is present.

18 . The process of claim 10 , wherein (d) said free radical polymerization catalyst is selected from the group consisting of peroxides, azo compounds and mixtures thereof.

19 . A polyurethane foam comprising the reaction product of:
(1) a polyisocyanate component, with (2) an isocyanate-reactive component comprising the polymer polyol of claim 1 ; in the presence of (3) one or more catalysts, (4) one or more blowing agents, and (5) one or more surfactants.

20 . A process for preparing a polyurethane foam, comprising reacting:
(1) a polyisocyanate component, with (2) an isocyanate-reactive component comprising the polymer polyol of claim 1 ; in the presence of (3) one or more catalysts, (4) one or more blowing agents, and (5) one or more surfactants.

Assignees

• Covestro Llc

Inventors

• Adkins Rick L

Classifications

• C08G18/7671

  containing only one alkylene bisphenyl group · CPC title

• C08G18/7614

  containing only one aromatic ring · CPC title

• C08G18/409

  Dispersions of polymers of C08G in organic compounds having active hydrogen · CPC title

• C08G18/0876

  the dispersing or dispersed phase being a polyol · CPC title

• C08G18/8108

  having only one isocyanate or isothiocyanate group · CPC title