Polysaccharide-elastomer masterbatch compositions

Patent metadata

Field	Value
Publication number	US-12077640-B2
Application number	US-202318185069-A
Country	US
Kind code	B2
Filing date	Mar 16, 2023
Priority date	Jun 30, 2017
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

Disclosed herein are polysaccharide-elastomer masterbatch compositions and processes for preparing the masterbatch compositions. One method comprises a step of a) mixing i) an aqueous polysaccharide dispersion, or ii) a basic aqueous polysaccharide solution, with a rubber latex solution containing a rubber component to form a mixture. The method further comprises the steps of: b) coagulating the mixture obtained in step a) to produce a coagulated mass; and c) drying the coagulated mass obtained in step b). The masterbatch compositions are useful in preparing rubber-containing articles.

First claim

What is claimed is:

1. A composition comprising rubber and
(i) poly alpha-1,3-glucan, wherein the percentage of glycosidic linkages of the poly alpha-1,3-glucan that are alpha-1,3 is greater than or equal to 50%, or
(ii) a poly alpha-1,3-glucan ester compound represented by Structure I:

wherein
(A) n is at least 6,
(B) each R is independently an —H or a first group comprising —CO—C x —COOH, wherein the —C x — portion of said first group comprises a chain of 2 to 18 carbon atoms,
(C) the poly alpha-1,3-glucan ester compound has a degree of substitution with the first group of about 0.001 to about 3.0, and
(D) the percentage of glycosidic linkages of the poly alpha-1,3-glucan ester compound that are alpha-1,3 is greater than or equal to 50%;

wherein the rubber comprises at least one diene-based sulfur-vulcanizable or peroxide-vulcanizable elastomer.

2. The composition of claim 1 , comprising said poly alpha-1,3-glucan.

3. The composition of claim 2 , wherein the percentage of glycosidic linkages of the poly alpha-1,3-glucan that are alpha-1,3 is greater than or equal to 90%.

4. The composition of claim 2 , wherein the poly alpha-1,3-glucan is in the form of fibrids.

5. The composition of claim 1 , comprising said poly alpha-1,3-glucan ester compound.

6. The composition of claim 5 , wherein the percentage of glycosidic linkages of the poly alpha-1,3-glucan ester compound that are alpha-1,3 is greater than or equal to 90%.

7. The composition of claim 5 , wherein the —C x — portion of said first group comprises a chain of 2 to 6 carbon atoms.

8. The composition of claim 1 , wherein the at least one diene-based sulfur-vulcanizable or peroxide-vulcanizable elastomer has a Tg below −30° C., as determined by dynamic mechanical analysis.

9. The composition of claim 1 , wherein the rubber comprises natural rubber.

10. The composition of claim 1 , wherein the rubber comprises synthetic polyisoprene, styrene butadiene rubber, ethylene propylene diene monomer rubber, hydrogenated nitrile butadiene rubber, polybutadiene, or neoprene.

11. The composition of claim 2 , further comprising a filler that comprises one or more of silica, carbon black, graphene, fullerene, or carbon nanotubes.

12. The composition of claim 1 , further comprising a cationic polymer or anionic polymer.

13. The composition of claim 1 , further comprising carboxymethyl poly alpha-1,3-glucan.

14. The composition of claim 3 , further comprising a filler that comprises one or more of silica or carbon black.

15. The composition of claim 3 , further comprising a filler that comprises one or more of graphene, fullerene, or carbon nanotubes.

16. The composition of claim 6 , further comprising a filler that comprises one or more of silica or carbon black.

17. The composition of claim 6 , further comprising a filler that comprises one or more of graphene, fullerene, or carbon nanotubes.

18. The composition of claim 5 , further comprising a filler that comprises one or more of silica, carbon black, graphene, fullerene, or carbon nanotubes.

19. The composition of claim 3 , wherein the rubber comprises natural rubber.

20. The composition of claim 6 , wherein the rubber comprises natural rubber.

Assignees

• Nutrition & Biosciences Usa 4 Inc

Inventors

• Behabtu Natnael
• Downey Jeffrey S
• Lenges Christian Peter
• Mekonnen Tizazu H

Classifications

• C08L23/16

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title

• C08K2003/309

  Sulfur containing acids · CPC title

• C08K5/54

  Silicon-containing compounds {(C08K5/0091 takes precedence)} · CPC title

• C08K5/17

  Amines; Quaternary ammonium compounds · CPC title

• C08K5/09

  Carboxylic acids; Metal salts thereof; Anhydrides thereof · CPC title