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Method for preparing air blocking agent for tire inner liners by taking black talc as raw material

An air blocker and airtight layer technology, applied in chemical instruments and methods, fibrous fillers, climate sustainability, etc., can solve the problems of low product purity, difficult exclusion of associated minerals and heavy metal impurities, and rubber matrix affinity There are still some problems to be improved to achieve the effect of shortening the process flow, excellent air tightness and certain reinforcement performance, modification effect and improvement of crushing efficiency

Pending Publication Date: 2020-04-14
湖南鑫天源新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the crushing precision of the method for preparing the air blocker for the tire inner liner needs to be improved, the difficult-to-grind associated minerals and heavy metal impurities are difficult to get rid of, the product purity is not high, and the dispersibility of black talcum powder is compatible with the rubber matrix Therefore, there is an urgent need to develop a method for preparing an air blocker for tire inner liners using black talc as a raw material.

Method used

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  • Method for preparing air blocking agent for tire inner liners by taking black talc as raw material
  • Method for preparing air blocking agent for tire inner liners by taking black talc as raw material
  • Method for preparing air blocking agent for tire inner liners by taking black talc as raw material

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Effect test

Embodiment approach 1

[0031] A method for preparing an air stopper for a tire inner liner using black talc as a raw material, is characterized in that it comprises the following steps:

[0032] (1) Raw ore pretreatment: After the massive raw ore is washed with water, associated minerals such as quartz, calcite, dolomite, and magnetite are manually removed, and the raw ore with high talc content and good sheet structure is retained.

[0033] (2) Coarse crushing: Use the jaw crusher to crush the raw ore to 2-5cm, then use the roller crusher to crush the raw ore to 2-5mm, and finally use the Raymond mill to crush the raw ore to 80 mesh.

[0034] (3) Magnetic separation: select electromagnetic dry type automatic magnetic separator, under the magnetic field strength of 12000GS, the material after coarse crushing is screened, and iron oxide content is 0.05% in the material after magnetic separation.

[0035] (4) Integration of ultrafine pulverization and modification: Utilize 0.7MPa, superheated air flow...

Embodiment approach 2

[0041]Utilize the product prepared in embodiment 1, utilize bromobutyl rubber to do airtightness test under different air blocking agent dosages.

[0042] The rubber formula is: bromobutyl rubber (100 parts), stearic acid (1 part), naphthenic oil V700 (9 parts), sulfur (1 part), zinc oxide (3.5 parts), accelerator DM (1.3 parts ), leveling agent (7 parts), resin (4 parts), air blocker (30, 40, 50 and 60 parts). Using the 1-stage mixing process, add the raw materials in the formula to the internal mixer one by one and mix them evenly, then make triangular bags in the open mixer for 3 times, and pass them thinly for 3 times. After standing for 6 hours, use a flat vulcanizer to vulcanize for 20 minutes under the pressure of 15Mpa. , Test the airtightness after vulcanization and molding for 24 hours. The airtightness of the samples is shown in Table 2.

[0043] Table 2 The relationship between the amount of air barrier agent and air permeability in bromobutyl rubber

[0044] ...

Embodiment approach 3

[0046] Utilize the product prepared in embodiment 1, utilize styrene-butadiene rubber to do air-tightness test under different air blocking agent dosages. The rubber formula is: styrene-butadiene rubber (100 parts), stearic acid (1 part), sulfur (1.75 parts), zinc oxide (3 parts), accelerator NS (1 part), air blocker (30, 40, 50 and 60 servings). Using the 1-stage mixing process, add the raw materials in the formula to the internal mixer one by one and mix them evenly, then make a triangular bag in the open mixer for 3 times, thin pass 3 times, and after standing for 6 hours, use a flat vulcanizer to vulcanize for 17 minutes under a pressure of 15Mpa. , Test the air tightness after vulcanization and molding for 24 hours. The airtightness of the samples is shown in Table 3.

[0047] Table 3 Relation table between air blocking agent dosage and air permeability in styrene-butadiene rubber

[0048] Blocker dosage (parts) 0 30 40 50 60 Air permeability Q(×10-...

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Abstract

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a method for preparing an air blocking agent for tire inner liners by taking black talc as a rawmaterial. The method comprises the following steps: 1, raw ore pretreatment including two steps of water washing and screening, wherein in the step of water washing, clay impurities attached to the surface of ore are removed through a water washing method, and in the screening step, associated minerals such as quartz, calcite, dolomite and magnetite are manually removed; 2, coarse crushing, wherein coarse crushing equipment is used for crushing the raw ore to 80-200 meshes; and 3, magnetic separation, wherein a magnetic separation machine is adopted to remove particles in crushed raw ore withhigh iron content. The method is capable of improving the precision of crushing of black talc, improving the dispersity of the black talc powder and the affinity of the black talc powder with a rubbermatrix, and meanwhile the comprehensive effect that associated minerals and heavy metal impurities which are difficult to grind can be effectively removed is achieved.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a method for preparing an air stopper for a tire inner liner using black talc as a raw material. Background technique [0002] Black talc is a kind of industrial talc in my country, because there is a layer of graphene-like sheet structure between the molecular layers, so it appears black. Black talc belongs to a layered magnesium silicate mineral with a Mohs hardness of only 1-1.5, stable chemical properties, high temperature resistance and acid and alkali corrosion. The main mineral composition of black talc is talc, quartz, calcite, dolomite and organic carbon, and its main chemical composition is magnesium oxide, silicon nitride, calcium oxide, aluminum oxide and a small amount of iron oxide, sodium oxide, titanium oxide, etc. my country's black talc reserves are extremely rich, and the domestic proven reserves are 600-800 million tons, and 90% of the reserves are dis...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/04C09C3/08C09C3/10C09C3/12C08K9/04C08K9/06C08K3/22C08K3/34C08L23/28C08L9/06C08K13/06
CPCC01P2004/61C01P2004/62C01P2006/12C01P2006/22C08K3/22C08K3/34C08K9/04C08K9/06C08K9/08C08K13/06C08K2003/2206C08K2003/222C08K2003/2227C08K2201/005C08K2201/006C08K2201/016C08L23/283C08L2205/03C09C1/28C09C3/003C09C3/006C09C3/04C09C3/041C09C3/08C09C3/10C09C3/12C08L91/00C08L9/06Y02P20/10
Inventor 尚志新邱瑜
Owner 湖南鑫天源新材料有限公司
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