Application of lignin in preparing radial tire

Patent metadata

Field	Value
Publication number	US-11814516-B2
Application number	US-202117305327-A
Country	US
Kind code	B2
Filing date	Jul 5, 2021
Priority date	Jul 8, 2020
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

The invention belongs to the field of rubber tire processing, and particularly discloses an application of a lignin in preparing a radial tire, wherein the lignin is capable of completely or partially replacing resorcinol, and meanwhile, the lignin is also capable of completely or partially replacing an anti-aging agent. Compared with the prior art, the resorcinol is replaced or partially replaced by a biomass-derived lignin or a modified lignin in the invention, so that requirements of cost reduction, environmental protection and no toxicity are satisfied. Especially, the lignin modified by demethylation according to the invention is capable of effectively enhancing various properties of rubber.

First claim

What is claimed is:

1. A method for preparing a radial tire with a lignin comprising a step of mixing the lignin in the radial tire; wherein the lignin is a modified lignin prepared by modifying an acetic acid lignin; the modifying is a demethylation or a vulcanization; wherein M100 is 4.9-5.2 MPa, M300 is 18.0-18.9 MPa, a tensile strength of the radial tire at break is 25.6-26.2 TB/MPa, hardness is 79-80 HS.

2. The method according to claim 1 , wherein the lignin completely or partially replaces a resorcinol in preparing the radial tire.

3. The method according to claim 2 , wherein the lignin completely or partially replaces an anti-aging agent in preparing the radial tire.

4. The method according to claim 3 , wherein in parts by weight, an amount of the anti-aging agent is 0 part to 1 part per 100 parts of rubber.

5. The method according to claim 2 , wherein in parts by weight, an amount of the resorcinol is 0 part to 0.5 part per 100 parts of rubber.

6. The method according to claim 5 , wherein the radial tire further comprises the following ingredients: a filler, a zinc oxide, an adhesion accelerator, a vulcanizing agent, an adhesive and a vulcanizing accelerator.

7. The method according to claim 6 , wherein based on 100 parts of rubber, weight parts of the ingredients are as follows:
45 parts to 65 parts of the filler;
6 part to 10 parts of the zinc oxide;
0.2 part to 1 part of the adhesion accelerator;
3 parts to 6 parts of the vulcanizing agent;
4 parts to 8 parts of the adhesive; and
1 part to 3 parts of the vulcanizing accelerator.

8. The method according to claim 1 , wherein the lignin completely or partially replaces an anti-aging agent in preparing the radial tire.

9. The method according to claim 8 , wherein in parts by weight, an amount of the anti-aging agent is 0 part to 1 part per 100 parts of rubber.

10. The method according to claim 1 , wherein in parts by weight, an amount of the lignin is 2 parts to 25 parts per 100 parts of rubber; wherein a particle size d50 of the lignin is 1 μm to 10 μm.

Assignees

• Nanjing University Of Technology

Inventors

• Zhu Chenjie
• Ying Hanjie
• Li Ming
• Ouyang Pingkai
• Shen Jiannong
• Xu Xinjian
• Zhuang Wei
• Shen Tao

Classifications

• C08L7/00 Primary

  Compositions of natural rubber · CPC title

• B60C1/0041

  Compositions of the carcass layers · CPC title

• B60C1/0016 Primary

  Compositions of the tread · CPC title

• C08L2201/08

  Stabilised against heat, light or radiation or oxydation · CPC title

• C08K2003/2296

  of zinc · CPC title