CN103613935A - Low-hardness extrusion rubber and preparation method thereof - Google Patents

Abstract

The invention discloses low-hardness extrusion rubber and a preparation method thereof. The low-hardness extrusion rubber consists of the following raw materials in parts by weight: 100 parts of raw rubber containing 0.03% of vinyl by mole and 20-30 parts of hydrophobic-process fumed silica. The product disclosed by the invention has good extrusion processing characteristics according to practical detection, and can meet the operation requirements in making an extrusion pipe, and the preparation method is convenient to operate.

Description

Soft is extruded glue and manufacture method thereof

Technical field

The present invention relates to the manufacture of silastic material, specifically a kind ofly for soft, extrude glue and manufacture method thereof.

Background technology

silicon rubber possesses the performances that good high-low temperature resistant, resistance to ozone, weathering resistance, insulativity and production inertia etc. are a lot of excellent, in the every field of national economy, has a wide range of applications.The environmental protection characteristic of silicon rubber with and excellent mechanical property determined that it is had ready conditions and become the material of making sealed strip.But be applied in sealed strip aspect, the requirement of extruding the actual extruding pipe of processed-type of soft silicon rubber, therefore, research soft is extruded glue and is had very positive meaning.

Summary of the invention

Technical problem to be solved by this invention is, soft is provided, and has silicon rubber and the manufacture method thereof of extruding preferably processing characteristics simultaneously.

The weight part that soft of the present invention is extruded its raw material composition of glue is:

The rubber 100 of vinyl molar content 0.03%

Hydrophobic method gas-phase silica 20-30

Manufacture method of the present invention is that the raw material based on above-mentioned forms, and its step is followed successively by;

A. the Methyl-ethylenvinyl gum of vinyl molar content 0.03% is joined in kneader and stirs 0.2-0.4 minute, notice that this step only adds 60-70 part by the rubber of contents of ethylene 0.03%;

B. hydrophobic method white carbon black is added several times, add rear abundant stirring at every turn, obtain silicon rubber gross rubber;

C., after kneaded and formed, logical circulating water, stirs half hour, adds residue rubber, stirs half an hour;

D. after plastic emitting, be cooled to room temperature, obtain product.

Product of the present invention, through the actual characteristic with soft that detects, has simultaneously and extrudes preferably processing characteristics, can meet the requirement of extruding pipe completely.

Embodiment

enforcement of the present invention is gone through step manufacture soft and is extruded glue:

E. the Methyl-ethylenvinyl gum of vinyl molar content 0.03% is joined in kneader and stirs 0.2-0.4 minute, notice that this step only adds 60-70 part by the rubber of contents of ethylene 0.03%;

F. hydrophobic method white carbon black is added several times, add rear abundant stirring at every turn, obtain silicon rubber gross rubber;

G., after kneaded and formed, logical circulating water, stirs half hour, adds residue rubber, stirs half an hour;

H. after plastic emitting, be cooled to room temperature, obtain product.

In use procedure, can add again vulcanizing agent sulfuration, under 170 degrees Celsius, vulcanize 5 minutes, 200 degrees Celsius of post cures 4 hours.

Above-mentioned raw-material parts by weight are:

The rubber 100 of vinyl molar content 0.03%

Hydrophobic method gas-phase silica 25

Soft to above-mentioned enforcement manufacture is extruded glue, is pressed into the thick test piece of 2mm, tests its performance, and by plasticity number, characterizes it and extrude processing characteristics, and performance is as following table:

Claims (2)

1. soft is extruded a silicon rubber, and the weight part that its raw material forms is:

The rubber 100 of vinyl molar content 0.03%

Hydrophobic method gas-phase silica 20-30.

2. soft as claimed in claim 1 is extruded a manufacture method for glue, and its step is followed successively by:

A. the Methyl-ethylenvinyl gum of vinyl molar content 0.03% is joined in kneader and stirs 0.2-0.4 minute, notice that this step only adds 60-70 part by the rubber of contents of ethylene 0.03%;

B. hydrophobic method gas-phase silica is added several times, add rear abundant stirring at every turn, obtain silicon rubber gross rubber;

C., after kneaded and formed, logical circulating water, stirs half hour, adds residue rubber, stirs half an hour;

After plastic emitting, be cooled to room temperature, obtain product.