CN104403323A - Conductive silicone rubber with high rebound resilience - Google Patents

Abstract

The invention discloses a conductive silicone rubber with high rebound resilience. The conductive silicone rubber is prepared from the following raw materials in parts by weight: 100-110 parts of methyl vinyl phenyl silicone rubber, 2-3 parts of polyaniline, 0.3-1 part of nickel aminosulfonate, 3-4 parts of fused magnesite, 2-3 parts of polypropylene oxide diol, 0.4-1 part of magnesium sulfate, 10-13 parts of triethylene glycol di-2-ethylhexoate, 1-2 parts of an accelerant DM (2,2'.-Dibenzothiazyl disulfide), 1-2 parts of an anti-ageing agent 4010, 10-16 parts of conductive black, 1-2 parts of ammonium molybdate, 0.4-1 parts of diazolidinyl urea, 1-2 parts of naphthenic oil, 0.7-2 parts of sulfur, and 3-4 parts of a rare earth additive. The rear earth additive is prepared by adopting the following steps: sufficiently blending colloid formed by magnesium aluminum silicate and polyvinyl acetal under the condition that deionized water is used as a solvent, so as to form a stable and high-viscosity colloidal state; adding the processed acidized rear earth to the colloidal state system to form a stable rear earth colloidal liquid; performing blending modification on the colloidal liquid with esterified zeolite. Therefore, the mechanical properties and the surface resistance of the product can be effectively improved; the compatibility of the materials can be strengthened; the stability of the finished product can be improved; meanwhile, the rear earth can reduce the abrasive volume and improve the abrasive resistance of the rubber.

Description

A kind of conductive silicon rubber with high resilience

Technical field

The present invention relates generally to rubber materials, particularly relates to a kind of conductive silicon rubber with high resilience.

Background technology

Silicon rubber has the performances such as excellent thermotolerance, winter hardiness, dielectricity, resistance to ozone and resistance to atmospheric aging, and the outstanding performance of silicon rubber is that use temperature is broad, can at-60 DEG C (or lower temperature) to+250 DEG C (or higher temperature) life-time service.

But the mechanical propertys such as the tensile strength of silicon rubber and tearing toughness are poor, its physical and mechanical properties is not as good as most of synthetic rubber at normal temperatures, and except nitrile silicon, trifluoropropyl siloxane, general silicon rubber oil resistant, solvent resistance is not good enough, therefore silicon rubber should not be used for the occasion of usual terms, therefore in silicon rubber, add various auxiliary agent to improve its proper property, its integrated quality can be improved, improve the suitability in each field.

Summary of the invention

The object of the invention is exactly to provide a kind of conductive silicon rubber with high resilience.

The present invention is achieved by the following technical solutions:

There is a conductive silicon rubber for high resilience, it is characterized in that what it was made up of the raw material of following weight parts:

Methyl vinyl phenyl silicon rubber 100-110, polyaniline 2-3, nickel sulfamic acid 0.3-1, electrosmelted magnesite clinker 3-4, polyoxypropyleneglycol 2-3, magnesium sulfate 0.4-1, triglycol two 2-ethylhexoate 10-13, altax 1-2, antioxidant 4010 1-2, graphitized carbon black 10-16, ammonium molybdate 1-2, two Imidurea 0.4-1, naphthenic oil 1-2, sulphur 0.7-2, rare-earth additive 3-4;

Described rare-earth additive is made up of the raw material of following weight parts:

Magnesium aluminum silicate 2-3, polyvinyl acetal 10-16, dodecanedioic acid 1-2, Lanthanum trichloride 5-6, nylon acid methyl esters 0.4-1, urea 0.6-1, formaldehyde 2-4, deionized water 120-130, quadrol 0.1-0.3, scolecite 40-50;

By dodecanedioic acid, Lanthanum trichloride mixing, add the 20-30% of above-mentioned deionized water weight, be uniformly mixed 40-50 minute, drip quadrol, stir after dropwising, obtain acidifying rare earth;

Scolecite being placed on concentration is soak 1-2 hour in the sodium hydroxide solution of 6-10%, mixes, be uniformly mixed 10-20 minute, obtain esterification zeolite at 60-70 DEG C after filtering washing with nylon acid methyl esters;

Polyvinyl acetal is joined in residue deionized water, at 90-95 DEG C, be uniformly mixed 30-40 minute, add acidifying rare earth, formaldehyde, magnesium aluminum silicate, continue insulation reaction 10-20 minute, drip urea, at 60-65 DEG C, be uniformly mixed 30-40 minute after dropwising, obtain rare earth glue;

Rare earth glue is mixed with esterification zeolite, puts into teflon-lined stainless steel cauldron, in the baking oven of 140-150 DEG C, place 2-3 hour, take out cooling, dry under room temperature, obtain described rare-earth additive.

There is a preparation method for the conductive silicon rubber of high resilience, it is characterized in that comprising the following steps:

(1) above-mentioned nickel sulfamic acid is joined in polyoxypropyleneglycol, after stirring, add polyaniline, at 50-60 DEG C, be uniformly mixed 3-5 minute, add graphitized carbon black, magnesium sulfate, dehydration, puts into vacuum drying oven, at 40-60 DEG C, dry 10-12 hour, obtains composite conducting material;

(2) triglycol two 2-ethylhexoate is mixed with naphthenic oil, be uniformly mixed 4-5 minute at 60-70 DEG C, obtain esterised oil;

(3) methyl vinyl phenyl silicon rubber is mixed with composite conducting material, thermal treatment 10-20 minute at 100-180 DEG C, add esterised oil and each raw material except altax, sulphur, continue the mixing 20-30 minute of insulation, be cooled to room temperature, send into mill, add each raw material of residue, at the temperature of 150-200 DEG C, mold pressing sulfidization molding, has the conductive silicon rubber of high resilience described in obtaining.

Advantage of the present invention is:

The present invention is by the polyaniline after process and graphitized carbon black blending and modifying, and the matrix material obtained has good electroconductibility, and finished product is easy to shaping, and can need to process the corresponding sealing article of preparation further according to different sealed structures.

Rare-earth additive of the present invention: the colloid that magnesium aluminum silicate and polyvinyl acetal are formed fully is merged under the condition being solvent with deionized water, stable, full-bodied colloidal state can be formed, acidifying rare earth after process is joined in this colloid system, form stable rare earth glue, then with esterification zeolite blending and modifying, not only effectively can improve mechanical property and the surface resistive of finished product, and the consistency of each storeroom can be strengthened, improve the stability of finished product, rare earth can reduce volume wear simultaneously, improves the wear resistance of rubber.

Embodiment

Embodiment 1

There is a conductive silicon rubber for high resilience, it is characterized in that what it was made up of the raw material of following weight parts:

Methyl vinyl phenyl silicon rubber 110, polyaniline 3, nickel sulfamic acid 0.3, electrosmelted magnesite clinker 3, polyoxypropyleneglycol 3, magnesium sulfate 0.4, triglycol two 2-ethylhexoate 13, altax 1, antioxidant 4010 2, graphitized carbon black 16, ammonium molybdate 2, two Imidurea 0.4, naphthenic oil 1, sulphur 0.7, rare-earth additive 3;

Described rare-earth additive is made up of the raw material of following weight parts:

Magnesium aluminum silicate 2, polyvinyl acetal 16, dodecanedioic acid 1, Lanthanum trichloride 6, nylon acid methyl esters 0.4, urea 0.6, formaldehyde 4, deionized water 130, quadrol 0.3, scolecite 50;

By dodecanedioic acid, Lanthanum trichloride mixing, add 30% of above-mentioned deionized water weight, be uniformly mixed 50 minutes, drip quadrol, stir after dropwising, obtain acidifying rare earth;

Scolecite being placed on concentration is soak 2 hours in the sodium hydroxide solution of 10%, mixes, be uniformly mixed 20 minutes, obtain esterification zeolite at 70 DEG C after filtering washing with nylon acid methyl esters;

Polyvinyl acetal is joined in residue deionized water, at 95 DEG C, be uniformly mixed 40 minutes, add acidifying rare earth, formaldehyde, magnesium aluminum silicate, continue insulation reaction 20 minutes, drip urea, at 65 DEG C, be uniformly mixed 30 minutes after dropwising, obtain rare earth glue;

Rare earth glue is mixed with esterification zeolite, puts into teflon-lined stainless steel cauldron, place 3 hours in the baking oven of 150 DEG C, take out cooling, dry under room temperature, obtain described rare-earth additive.

There is a preparation method for the conductive silicon rubber of high resilience, it is characterized in that comprising the following steps:

(1) above-mentioned nickel sulfamic acid is joined in polyoxypropyleneglycol, after stirring, add polyaniline, at 60 DEG C, be uniformly mixed 3 minutes, add graphitized carbon black, magnesium sulfate, dehydration, puts into vacuum drying oven, at 60 DEG C, drying 12 hours, obtains composite conducting material;

(2) triglycol two 2-ethylhexoate is mixed with naphthenic oil, be uniformly mixed 5 minutes at 70 DEG C, obtain esterised oil;

(3) methyl vinyl phenyl silicon rubber is mixed with composite conducting material, thermal treatment 20 minutes at 180 DEG C, add esterised oil and each raw material except altax, sulphur, continue mixing 30 minutes of insulation, be cooled to room temperature, send into mill, add each raw material of residue, at the temperature of 200 DEG C, mold pressing sulfidization molding, has the conductive silicon rubber of high resilience described in obtaining.

Performance test: its volume specific resistance≤3 Ω cm; Tensile strength >=4MPa, compression set≤10%, rebound degree >=65%.

Claims (2)

1. there is a conductive silicon rubber for high resilience, it is characterized in that what it was made up of the raw material of following weight parts:

Methyl vinyl phenyl silicon rubber 100-110, polyaniline 2-3, nickel sulfamic acid 0.3-1, electrosmelted magnesite clinker 3-4, polyoxypropyleneglycol 2-3, magnesium sulfate 0.4-1, triglycol two 2-ethylhexoate 10-13, altax 1-2, antioxidant 4010 1-2, graphitized carbon black 10-16, ammonium molybdate 1-2, two Imidurea 0.4-1, naphthenic oil 1-2, sulphur 0.7-2, rare-earth additive 3-4;

Described rare-earth additive is made up of the raw material of following weight parts:

Magnesium aluminum silicate 2-3, polyvinyl acetal 10-16, dodecanedioic acid 1-2, Lanthanum trichloride 5-6, nylon acid methyl esters 0.4-1, urea 0.6-1, formaldehyde 2-4, deionized water 120-130, quadrol 0.1-0.3, scolecite 40-50;

By dodecanedioic acid, Lanthanum trichloride mixing, add the 20-30% of above-mentioned deionized water weight, be uniformly mixed 40-50 minute, drip quadrol, stir after dropwising, obtain acidifying rare earth;

Scolecite being placed on concentration is soak 1-2 hour in the sodium hydroxide solution of 6-10%, mixes, be uniformly mixed 10-20 minute, obtain esterification zeolite at 60-70 DEG C after filtering washing with nylon acid methyl esters;

Polyvinyl acetal is joined in residue deionized water, at 90-95 DEG C, be uniformly mixed 30-40 minute, add acidifying rare earth, formaldehyde, magnesium aluminum silicate, continue insulation reaction 10-20 minute, drip urea, at 60-65 DEG C, be uniformly mixed 30-40 minute after dropwising, obtain rare earth glue;

Rare earth glue is mixed with esterification zeolite, puts into teflon-lined stainless steel cauldron, in the baking oven of 140-150 DEG C, place 2-3 hour, take out cooling, dry under room temperature, obtain described rare-earth additive.

2. there is a preparation method for the conductive silicon rubber of high resilience as claimed in claim 1, it is characterized in that comprising the following steps:

(1) above-mentioned nickel sulfamic acid is joined in polyoxypropyleneglycol, after stirring, add polyaniline, at 50-60 DEG C, be uniformly mixed 3-5 minute, add graphitized carbon black, magnesium sulfate, dehydration, puts into vacuum drying oven, at 40-60 DEG C, dry 10-12 hour, obtains composite conducting material;

(2) triglycol two 2-ethylhexoate is mixed with naphthenic oil, be uniformly mixed 4-5 minute at 60-70 DEG C, obtain esterised oil;

(3) methyl vinyl phenyl silicon rubber is mixed with composite conducting material, thermal treatment 10-20 minute at 100-180 DEG C, add esterised oil and each raw material except altax, sulphur, continue the mixing 20-30 minute of insulation, be cooled to room temperature, send into mill, add each raw material of residue, at the temperature of 150-200 DEG C, mold pressing sulfidization molding, has the conductive silicon rubber of high resilience described in obtaining.