Polar-modified rice husk wax

Patent metadata

Field	Value
Publication number	US-10676618-B2
Application number	US-201615744503-A
Country	US
Kind code	B2
Filing date	Jul 14, 2016
Priority date	Jul 14, 2015
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

The invention provides polar-modified rice husk waxes obtainable by free-radical grafting of unmodified rice husk waxes with graft comonomers selected from the group of the α,β-unsaturated mono- or polybasic carboxylic acids or derivatives thereof. The invention further provides derivatization products prepared by chemical conversion of the polar-modified rice husk waxes of the invention. The invention further provides processes for producing the products of the invention and for the use thereof.

First claim

The invention claimed is:

1. A polar-modified rice husk wax obtained by free-radical grafting of unmodified rice husk wax with one or more graft comonomers selected from the group consisting of α,β-unsaturated mono- or polybasic carboxylic acids and derivatives thereof selected from the group consisting of esters, amides and anhydrides, wherein the polar-modified rice husk wax has an acid number of 2 to 120 mg KOH/g, a melt viscosity measured at 90° C. of 20 to 500 mPa·s and a dropping point of 40 to 90° C.

2. The polar-modified rice husk wax as claimed in claim 1 , wherein the graft comonomer is maleic anhydride.

3. A process for producing the polar-modified rice husk wax as claimed in claim 1 , comprising reacting refined rice husk wax with an α,β-unsaturated mono- or polybasic carboxylic acid or with a derivative thereof selected from the group consisting of an ester, an amide and an anhydride in the presence of a free-radical initiator to form the polar-modified rice husk wax.

4. A product obtained from the polar-modified rice husk wax as claimed in claim 1 , where the polar-modified rice husk is subjected to one or more of hydrolysis, alcoholysis, esterification, amidation, hydrolysis, ethoxylation, anhydride formation and decarboxylation.

5. A hydrolysis product formed by hydrolysis of the polar-modified rice husk wax as claimed in claim 1 , wherein the hydrolysis is effected with metal oxides, metal hydroxides or metal carbonates.

6. An aqueous dispersion comprising the polar-modified rice husk wax as claimed in claim 1 .

7. A solvent-based dispersion comprising the polar-modified rice husk wax as claimed in claim 1 .

8. A lubricant additive in plastics comprising the polar-modified rice husk wax as claimed in claim 1 .

9. A dispersant for pigment masterbatch formulation for coloring of plastics comprising the polar-modified rice husk wax as claimed in claim 1 .

10. An adhesion promoter in composite materials composed of plastics and wood or plastics and glass fibers comprising the polar-modified rice husk wax as claimed in claim 1 .

11. A compatibilizer in blends of different plastics comprising the polar-modified rice husk wax as claimed in claim 1 .

12. A hotmelt adhesive comprising the polar-modified rice husk wax as claimed in claim 1 .

13. A solvent-containing paste comprising the polar-modified rice husk wax as claimed in claim 1 .

14. An aqueous dispersion comprising a derivatization product of the polar-modified rice husk wax as claimed in claim 1 .

15. A solvent-based dispersion comprising a derivatization product of the polar-modified rice husk wax as claimed in claim 1 .

16. A lubricant additive in plastics comprising a derivatization product of the polar-modified rice husk wax as claimed in claim 1 .

17. A dispersant for pigment masterbatch formulation for coloring of plastics comprising a derivatization product of the polar-modified rice husk wax as claimed in claim 1 .

18. An adhesion promoter in composite materials composed of plastics and wood or plastics and glass fibers comprising a derivatization product of the polar-modified rice husk wax as claimed in claim 1 .

19. A hotmelt adhesive comprising a derivatization product of the polar-modified rice husk wax as claimed in claim 1 .

20. A solvent-containing paste comprising a derivatization product of the polar-modified rice husk wax as claimed in claim 1 .

Assignees

• Clariant Int Ltd

Inventors

• Broehmer Manuel
• Can Aran Halil
• Hauck Erik
• Hohner Gerd
• Goeres Stefanie
• Weber Rosemarie
• Fell Rainer

Classifications

• C08F289/00

  Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00 · CPC title

• C09F1/04

  Chemical modification, e.g. esterification (resin soaps C11D) · CPC title

• C08L91/06 Primary

  Waxes · CPC title

• C08F222/06

  Maleic anhydride · CPC title

• C08F8/46

  Reaction with unsaturated dicarboxylic acids or anhydrides thereof, e.g. maleinisation · CPC title