Cardanol modified epoxy polyol

Patent metadata

Field	Value
Publication number	US-10144845-B2
Application number	US-201315029691-A
Country	US
Kind code	B2
Filing date	Nov 27, 2013
Priority date	Nov 27, 2013
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A cardanol modified epoxy polyol may be used for forming a polyurethane resin system for use in applications such as coatings and composites formed by filament winding. The polyurethane resin system includes an isocyanate-reactive component that has a first cardanol component and the cardanol-modified epoxy polyol, and includes an isocyanate component that includes at least one polyisocyanate. The cardanol-modified epoxy polyol is a reaction product of an epoxy component and an epoxy-reactive component at a ratio of epoxy groups to epoxy reactive groups from 1:0.95 to 1:5, and the epoxy-reactive component includes a second cardanol component.

First claim

The invention claimed is:

1. A polyurethane resin system, comprising:
an isocyanate-reactive component that includes a first cardanol component and a cardanol-modified epoxy polyol, the cardanol-modified epoxy polyol being a reaction product of an epoxy component and an epoxy-reactive component at a ratio of epoxy groups to epoxy reactive groups from 1:0.95 to 1:5, the epoxy-reactive component including a second cardanol component, and
an isocyanate component that includes at least one polyisocyanate.

2. The polyurethane resin system as claimed in claim 1 , wherein:
the first cardanol component has a cardanol content that is from 50 wt % to 80 wt % and cardol content that is from 20% to 50%, based on a total weight of the first cardanol component, and
the second cardanol component has a cardanol content of at least 85 wt %, based on a total weight of the second cardanol component.

3. The polyurethane resin system as claimed in claim 1 , wherein the cardanol content in the second cardanol component is from 90 wt % to 99 wt % and a cardol content in the second cardanol component is from 0.5 wt % to 8 wt %, based on the total weight of the cashew nutshell liquid.

4. The polyurethane resin system as claimed in claim 1 , wherein the isocyanate-reactive component includes from 5 wt % to 30 wt % of the first cardanol component, from 15 wt % to 50 wt % of the cardanol-modified epoxy polyol, and from 15 wt % to 45 wt % of at least one other polyol, based on a total weight of the isocyanate-reactive component.

5. The polyurethane resin system as claimed in claim 4 , wherein the at least one other polyol includes at least one selected from the group of a low molecular weight polyol having a number average molecular weight less than 500, a high hydroxyl number polyol having an average hydroxyl number from 260 to 800 mg KOH/g, and a natural oil derived polyol.

6. The polyurethane resin system as claimed in claim 1 , wherein the isocyanate-reactive component includes from 1 wt % to 15 wt % of a zeolite.

7. The polyurethane resin system as claimed in claim 1 , wherein an isocyanate index of the reaction system is from 60 to 200.

8. A coating including the polyurethane resin system as claimed in claim 1 .

9. A composite material produced with the polyurethane resin system as claimed in claim 1 .

10. A process for forming a composite material with filament winding, the method comprising:
coating a filament with the polyurethane resin system as claimed in claim 1 to form a coated filament,
winding the coated filament around a mandrel, and
curing the coated filament to form a composite material.

Assignees

• Dow Global Technologies Llc

Inventors

• Li Jiang
• Zhang Yi
• Li Wei
• Wang Beilei
• Diena Paolo

Classifications

• C08G18/58

  Epoxy resins {(C08G18/42, C08G18/48 take precedence; reaction products of epoxy resins with at least equivalent amounts of compounds containing active hydrogen C08G18/6407, with at least equivalent amounts of amines C08G18/6415; polymeric products of isocyanates or isothiocyanates with epoxy compounds having no active hydrogen C08G18/003)} · CPC title

• C08G18/4045

  Mixtures of compounds of group C08G18/58 with other macromolecular compounds · CPC title

• C08G18/7664

  containing alkylene polyphenyl groups · CPC title

• C09D175/04 Primary

  Polyurethanes · CPC title

• C08G18/4837

  and other oxyalkylene units · CPC title