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Preparation method for airtight liner material and raw material formula of airtight liner material

A technology of airtight layer and formula, which is applied in the field of preparation of airtight layer materials, can solve the problems that the output does not meet the design requirements, and achieve the effect of low glass transition temperature, excellent aging resistance, and not easy to harden at low temperature

Inactive Publication Date: 2015-09-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production capacity of brominated butyl rubber in my country is 30,000 tons per year, but because this device needs to share the production line with butyl rubber, the actual output has not reached the design requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] With the degree of branching as 106 branched chains / 1000 carbons (wherein the methyl content is 50.6 mol%, the ethyl content is 13.2 mol%, the propyl content is 6.7 mol%, the butyl content is 4.9 mol%, the amyl content 3.7mol%, carbon number ≥ 6 branched chain content is 20.8mol%), glass transition temperature is -65°C, weight average molecular weight is 250,000, and Mooney viscosity ML(1+4) is 16.75 at 125°C Polyethylene is the main raw material.

[0034] Components of the processing formula and parts by weight of each component: branched polyethylene 100; zinc oxide 1; stearic acid 0.1; carbon black N330 30; DBPH 2; DM 0.3.

[0035] The processing steps are as follows:

[0036] Step (1) Set the initial temperature of the internal mixer to 40°C, and the rotor speed to 50 rpm, and keep it for 10 minutes after the temperature stabilizes;

[0037] Step (2) 100 parts by weight of branched polyethylene was masticated in an internal mixer for 1.5 minutes, added 1 part by w...

Embodiment 2

[0041] Change the vulcanization temperature of step (4) in Example 1 to 175° C., change the vulcanization time to 12 minutes, and keep other conditions constant.

Embodiment 3

[0043] Change the vulcanization temperature of step (4) in Example 1 to 175° C., change the vulcanization time to 10 minutes, and keep other conditions constant.

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Abstract

The invention relates to airtight materials and provides a preparation method for an airtight liner material and a raw material formula of the airtight liner material. The raw material formula involves, by weight, 100 parts of branched polyethylene, 30-100 parts of carbon black, 2-10 parts of peroxide crosslinking agents, 1-10 parts of zinc oxide, 0.1-1 part of lubricants and 0.3-1 part of accelerants. The branched polyethylene serves as a principal raw material of the airtight liner material, and raw material cost is lower than that of butyl rubber; the glass-transition temperature is low, cold endurance is good, and the phenomenon of low-temperature hardening is unlikely to occur; no unsaturated double bonds exist in the molecular structure, and ageing-resistant performance is excellent; mobility is good, and the dispersion effect of filler is good; the airtight liner material has the same air tightness as the butyl rubber and is better than the butyl rubber in abrasive resistance and rebound resilience.

Description

technical field [0001] The invention relates to an airtight material, in particular to a method for preparing an airtight layer material and its raw material formula. Background technique [0002] Butyl rubber is widely used in tire production due to its excellent gas barrier properties, and has become an irreplaceable raw material for the production of tire inner tubes and airtight layers. With the strong growth of tire consumption, the increase of medical demand and the rapid growth of the environmental protection market, the total consumption of butyl rubber in the world has shown a steady growth trend in the past few years, and the annual growth rate has remained at about 2%. The demand has increased in the last two years, with an average annual growth rate of about 5%. In 2009, the total consumption of butyl and halogenated butyl rubber in the world reached 1 million tons, of which the proportion of consumption of halogenated butyl rubber exceeded 80%. The total consu...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K3/22C08K5/09C08K3/04C08K5/14C08K5/47C08K5/3492
CPCC08K3/22C08K3/04C08K5/09C08K5/14C08K5/3492C08K5/47C08K2003/2296C08L23/06
Inventor 傅智盛范志强
Owner ZHEJIANG UNIV
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