Preparation method of clay and modified butadiene styrene rubber nanocomposite for inner liner of tire

A nano-composite material, styrene-butadiene rubber technology, applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of unimproved interfacial strength, increased clay lamella spacing, poor compatibility, etc., to improve Dispersion, improve airtight performance, low cost effect

Inactive Publication Date: 2016-07-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, butyl rubber has some problems like this: these polymers are compared with general-purpose rubber, and the price is very expensive, and butyl rubber and styrene-butadiene rubber, natural rubber that are commonly used as treads are less compatible, so they need to be A high-viscosity component is added between the tire tread and the inner liner to bond
This method effectively increases the distance between the clay sheets, making it easier for the rubber macromolecules to intercalate into the clay sheets, but the rubber and clay are still physically entangled, and the interfacial strength does not change. be improved

Method used

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  • Preparation method of clay and modified butadiene styrene rubber nanocomposite for inner liner of tire
  • Preparation method of clay and modified butadiene styrene rubber nanocomposite for inner liner of tire
  • Preparation method of clay and modified butadiene styrene rubber nanocomposite for inner liner of tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First, add deionized water into the reaction kettle, stir evenly, start stirring and heat up to 50°C, then add 1g of potassium persulfate, 290g of styrene, 10g of 2-vinylpyridine, add 700g of butadiene after vacuuming, and the whole polymerization The process controls the polymerization temperature at 50°C±2°C. When the conversion rate reaches 100%, the polymerization is terminated, and the material is discharged at room temperature to obtain the product. The appearance of the product is milky white and translucent, and its solid content is about 40% (mass percentage, the same below).

[0031] Then commercially available sodium-based bentonite is stirred in deionized water, left standstill after mixing uniformly, and the final solid content is controlled at 0.1% (mass percentage, the same below), and the clay aqueous suspension 100g is mixed with the above-mentioned modified styrene-butadiene latex 250g Stir and mix at room temperature, and then pour it into 0.5% (mass ...

Embodiment 2

[0033] First, add deionized water into the reaction kettle, stir evenly, start stirring and heat up to 55°C, then add 2g of potassium persulfate, 260g of styrene, 20g of 2-vinylpyridine, add 720g of butadiene after vacuuming, and the whole polymerization The process controls the polymerization temperature at 55°C±2°C. When the conversion rate reaches 90%, the polymerization is terminated, and the material is discharged at room temperature to obtain the product. The appearance of the product is milky white and translucent, and its solid content is about 36%.

[0034]Then commercially available sodium-based bentonite was stirred in deionized water, mixed uniformly and left to stand, the final solid content was controlled at 1%, the clay aqueous suspension 100g and the above-mentioned modified styrene-butadiene latex 278g were stirred and mixed at room temperature, Then pour it into 1% hydrochloric acid solution for flocculation. The flocculation product is washed clean, and the...

Embodiment 3

[0036] First, add deionized water into the reaction kettle, stir evenly, start stirring and raise the temperature to 60°C, then add 5g of ammonium persulfate, 240g of styrene, 20g of 2-vinylpyridine, add 740g of butadiene after vacuuming, and the whole polymerization The process controls the polymerization temperature at 60°C±2°C. When the conversion rate reaches 85%, the polymerization is terminated, and the material is discharged at room temperature to obtain the product. The appearance of the product is milky white and translucent, and its solid content is about 34%.

[0037] Then commercially available sodium-based bentonite was stirred in deionized water, mixed uniformly and left to stand, the final solid content was controlled at 2%, and 250 g of the clay aqueous suspension was stirred and mixed with the above-mentioned modified styrene-butadiene latex 294 g at room temperature, Then pour it into 1.5% sodium chloride solution for flocculation. The flocculation product i...

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Abstract

The invention provides a preparation method of clay and modified butadiene styrene rubber nanocomposite for an inner liner of a tire and belongs to the field of rubber products. Modified emulsion polymerized butadiene styrene rubber is synthesized in a free-radical emulsion polymerization manner with 2-vinylpyridine as a third monomer modifier. The prepared modified butadiene styrene rubber latex is mixed with a clay water suspension in certain concentration, the mixture is stirred uniformly, mixed with a flocculant for demulsification and flocculation, washed and dried, and the clay and modified butadiene styrene rubber nanocomposite suitable for production of the inner liner of the tire is prepared. The nanocomposite has very good compatibility with butadiene styrene rubber commonly used for the tread of a tire, is low in hardness, high in vulcanization speed, good in mechanical performance, good in airtightness and lower in cost.

Description

technical field [0001] The invention relates to a preparation method of a clay / modified styrene-butadiene rubber nanocomposite material suitable for making an inner layer of a tire, and belongs to the technical field of rubber products. In this method, the third monomer modifier is added to the styrene-butadiene rubber to form a chemical bond with the lamellar structure and negatively charged clay between the layers, which improves the dispersion of the clay in the rubber matrix and forms a strong The role of the interface, thereby improving the airtight performance of the composite material. Background technique [0002] It is well known in the art that a tire innerliner must be constructed of a material with a low air permeability and yet soft. Butyl rubber, or halobutyl rubber, is pretty much the only rubber used for this purpose, and for a long time was the only polymer of this type to have the properties necessary to make tire innerliners and inner tubes, due to the T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00C08K3/34C08F236/06C08F212/08C08F226/06C08F2/22B60C1/00
CPCC08K3/346B60C1/00C08F236/06C08K2201/011
Inventor 王益庆薛辰沈家锋吴晓辉楼鹏飞张立群
Owner BEIJING UNIV OF CHEM TECH
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