Hydrophobic polyols

Patent metadata

Field	Value
Publication number	US-10487171-B2
Application number	US-201615577903-A
Country	US
Kind code	B2
Filing date	May 27, 2016
Priority date	Jun 1, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A curable composition includes a reaction product of an isocyanate component that includes one or more isocyanates, at an isocyanate index being from 90 to 150, and an isocyanate reactive component that includes a blend including from 5 wt % to 95 wt % of a first butylene oxide based polyol and from 5 wt % to 95 wt % of a second butylene oxide based polyol. The first butylene oxide based polyol has a number average molecular weight from 200 g/mol to 1,000 g/mol and a nominal hydroxyl functionality from 2 to 6. The second butylene oxide based polyol has a number average molecular weight greater than 1,000 g/mol and less than 8,000 g/mol and a nominal hydroxyl functionality from 2 to 4. The blend accounts for at least 50 wt % of a total weight of polyols in the isocyanate-reactive component.

First claim

The invention claimed is:

1. A curable composition, comprising:
a reaction product of:
an isocyanate component that includes one or more isocyanates, an isocyanate index being from 90 to 150; and
an isocyanate-reactive component that includes a blend including from 5 wt % to 95 wt % of a first butylene oxide based polyol and from 5 wt % to 95 wt % of a second butylene oxide based polyol, based on a total weight of the blend, the first butylene oxide based polyol having a number average molecular weight from 200 g/mol to 1,000 g/mol and a nominal hydroxyl functionality from 2 to 6, the second butylene oxide based polyol having a number average molecular weight greater than 1,000 g/mol and less than 8,000 g/mol and a nominal hydroxyl functionality from 2 to 4, and the blend accounting for at least 60 wt % of a total weight of polyols in the isocyanate-reactive component.

2. The composition as claimed in claim 1 , wherein the first butylene oxide based polyol is derived from 75 wt % to 100 wt % of butylene oxide, based on a total weight of alkylene oxides, and has a nominal hydroxyl functionality of 3.

3. The composition as claimed in claim 1 , wherein the second butylene oxide based polyol is a polyoxybutylene-polyoxypropylene polyol having a nominal hydroxyl functionality of 2 or a polyoxybutylene-polyoxyethylene polyol having a nominal hydroxyl functionality of 2.

4. The composition as claimed in claim 1 , wherein the second butylene oxide base polyol has a number average molecular weight from 1,500 g/mol to 3,000 g/mol.

5. The composition as claimed in claim 1 , wherein a ratio of a weight percentage of the first butylene oxide based polyol in the isocyanate-reactive component to a weight percentage of the second butylene oxide based polyol in the isocyanate-reactive component in the blend is in a range from 0.1:1.0 to 3.5:1.0.

6. The composition as claimed in claim 1 , wherein the isocyanate-reactive component further includes a polyether polyol different from the first and second butylene oxide based polyols.

7. The composition as claimed in claim 1 , wherein the isocyanate component includes from 20 wt % to 100 wt %, based on the total weight of the isocyanate component, of one or more isocyanate terminated prepolymers having an isocyanate group content from 1 wt % to 35 wt %.

8. A polyurethane based adhesive, comprising the curable composition as claimed in claim 1 .

9. A polyurethane based coating, comprising the curable composition as claimed in claim 1 .

10. The composition as claimed in claim 1 , wherein the blend accounts for at least 80 wt % of the total weight of polyols in the isocyanate-reactive component.

11. The composition as claimed in claim 10 , wherein a ratio of a weight percentage of the first butylene oxide based polyol in the isocyanate-reactive component to a weight percentage of the second butylene oxide based polyol in the isocyanate-reactive component in the blend is in a range from 0.1:1.0 to 3.5:1.0.

12. The composition as claimed in claim 11 , wherein the first butylene oxide based polyol is derived from 75 wt % to 100 wt % of butylene oxide, based on a total weight of alkylene oxides, and has a nominal hydroxyl functionality of 3 and the second butylene oxide based polyol is a polyoxybutylene-polyoxypropylene polyol having a nominal hydroxyl functionality of 2 or a polyoxybutylene-polyoxyethylene polyol having a nominal hydroxyl functionality of 2.

13. The composition as claimed in claim 1 , wherein the blend accounts for at least 90 wt % of the total weight of polyols in the isocyanate-reactive component.

14. The composition as claimed in claim 13 , wherein a ratio of a weight percentage of the first butylene oxide based polyol in the isocyanate-reactive component to a weight percentage of the second butylene oxide based polyol in the isocyanate-reactive component in the blend is in a range from 0.1:1.0 to 3.5:1.0.

15. The composition as claimed in claim 14 , wherein the first butylene oxide based polyol is derived from 75 wt % to 100 wt % of butylene oxide, based on a total weight of alkylene oxides, and has a nominal hydroxyl functionality of 3 and the second butylene oxide based polyol is a polyoxybutylene-polyoxypropylene polyol having a nominal hydroxyl functionality of 2 or a polyoxybutylene-polyoxyethylene polyol having a nominal hydroxyl functionality of 2.

Assignees

• Dow Global Technologies Llc

Inventors

• Colson Adam C
• Stephenson Amber Marie
• Krishnan Bindu

Classifications

• C09J175/08

  from polyethers · CPC title

• C09D175/08

  from polyethers · CPC title

• C08G18/797 Primary

  containing carbodiimide and/or uretone-imine groups · CPC title

• C08G18/6674

  with compounds of group C08G18/3203 · CPC title

• C08G18/4854 Primary

  Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group · CPC title