CN104371333A - Lightweight flame-retardant silicone rubber - Google Patents

Abstract

The invention discloses lightweight flame-retardant silicone rubber. The lightweight flame-retardant silicone rubber is prepared from the following raw materials in parts by weight: 100-113 parts of methyl vinyl phenyl polysiloxane rubber, 0.6-1 part of hemin, 3-5 parts of polydicyclopentadiene, 2-4 parts of microencapsulated red phosphorus, 1-2 parts of 4, 4'-oxybis(benzenesulfonylhydrazide), 3-5 parts of sillimanite powder, 30-34 parts of lightweight calcium carbonate, 2-3 parts of double-tetradecenoic alcohol ester, 0.6-1 part of polyhexamethylene guanidine, 1-2 parts of silicon nitride, 2-3 parts of polytetrafluoroethylene wax, 0.6-1 part of an anti-aging agent 4010NA, 2-3 parts of aluminum dihydrogen phosphate, 3-4 parts of a rare earth additive and 1-2 parts of a vulcanizing agent pdm. The rare earth additive disclosed by the invention is as follows: a colloid formed by magnesium aluminum silicate and polyvinyl acetal is fully blended under the condition of taking deionized water as a solvent, then a stable and high-viscosity colloidal state can be formed, acidified rare earth after treatment is added into the colloidal system to form a stable rare earth colloidal liquid, and then blending with esterified zeolite is performed for modification, so that the mechanical properties and the surface resistance of a finished product can be effectively improved, the compatibility between the materials can be also enhanced, the stability of the finished product is improved, and the rare earth can simultaneously reduce the volume wear loss and improve the wear resistance of the rubber.

Description

A kind of light flame-retardant silicon rubber

Technical field

The present invention relates generally to rubber materials, particularly relates to a kind of light flame-retardant silicon rubber.

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 light flame-retardant silicon rubber.

The present invention is achieved by the following technical solutions:

A kind of light flame-retardant silicon rubber, is characterized in that what it was made up of the raw material of following weight parts:

Methyl vinyl phenyl silicon rubber 100-113, protohemine 0.6-1, polydicyclopentadiene 3-5, microencapsulated powder oil 2-4,4,4 '-OBSH 1-2, fibrolite powder 3-5, light calcium carbonate 30-34, two ten four carbon alcohols ester 2-3, polyhexamethylene guanidine 0.6-1, silicon nitride 1-2, tetrafluoroethylene wax 2-3, antioxidant 4010NA 0.6-1, aluminium dihydrogen phosphate 2-3, rare-earth additive 3-4, vulcanizing agent pdm 1-2;

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, a preparation method for light flame-retardant silicon rubber as claimed in claim 1, is characterized in that comprising the following steps:

(1) two ten four carbon alcohols esters are mixed with polyhexamethylene guanidine, add aluminium dihydrogen phosphate after stirring, at 60-65 DEG C, be uniformly mixed 3-6 minute, add microencapsulated powder oil, be stirred to normal temperature, obtain composite flame-proof auxiliary agent;

(2) tetrafluoroethylene wax is mixed with light calcium carbonate, at 70-80 DEG C, be uniformly mixed 5-10 minute, add above-mentioned composite flame-proof auxiliary agent, be stirred to normal temperature;

(3) by each raw material mixing after above-mentioned process, add protohemine, stir, at 80-90 DEG C, be uniformly mixed 5-10 minute, then add methyl vinyl phenyl silicon rubber, put in mill evenly mixing, add each raw material except vulcanizing agent pdm, adjustment roll spacing is to 1-2mm, and thin-pass 8-10 time, is uniformly dispersed, add each raw material of residue, mold pressing sulfidization molding at the temperature of 150-200 DEG C, curing time is 5-20 minute, obtains described light flame-retardant silicon rubber.

Advantage of the present invention is:

Rubber articles of the present invention is main stuffing with light calcium carbonate, greatly reduces the weight of rubber product, increases the scope of application of rubber, and rubber product of the present invention is water-fast, resistance to acids and bases good, long service life, and over-all properties is superior.

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

A kind of light flame-retardant silicon rubber, is characterized in that what it was made up of the raw material of following weight parts:

Methyl vinyl phenyl silicon rubber 113, protohemine 0.6, polydicyclopentadiene 5, microencapsulated powder oil 2,4,4 '-OBSH 2, fibrolite powder 5, light calcium carbonate 34, two ten four carbon alcohols esters 2, polyhexamethylene guanidine 0.6, silicon nitride 1, tetrafluoroethylene wax 2, antioxidant 4010NA 0.6, aluminium dihydrogen phosphate 2, rare-earth additive 3-4, vulcanizing agent pdm 2;

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

Magnesium aluminum silicate 3, polyvinyl acetal 16, dodecanedioic acid 1, Lanthanum trichloride 6, nylon acid methyl esters 0.4, urea 0.6, formaldehyde 2, 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 1 hour in the sodium hydroxide solution of 6-10%, 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 40 minutes after dropwising, obtain rare earth glue;

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

A preparation method for light flame-retardant silicon rubber, is characterized in that comprising the following steps:

(1) two ten four carbon alcohols esters are mixed with polyhexamethylene guanidine, add aluminium dihydrogen phosphate after stirring, at 65 DEG C, be uniformly mixed 3 minutes, add microencapsulated powder oil, be stirred to normal temperature, obtain composite flame-proof auxiliary agent;

(2) tetrafluoroethylene wax is mixed with light calcium carbonate, at 80 DEG C, be uniformly mixed 10 minutes, add above-mentioned composite flame-proof auxiliary agent, be stirred to normal temperature;

(3) by each raw material mixing after above-mentioned process, add protohemine, stir, at 90 DEG C, be uniformly mixed 10 minutes, then add methyl vinyl phenyl silicon rubber, put in mill evenly mixing, add each raw material except vulcanizing agent pdm, adjustment roll spacing is to 1-2mm, and thin-pass 10 times, is uniformly dispersed, add each raw material of residue, mold pressing sulfidization molding at the temperature of 200 DEG C, curing time is 20 minutes, obtains described light flame-retardant silicon rubber.

Performance test: tensile strength at yield: >=10MPa;

Elongation: >=350%;

Hot air aging (150 DEG C, 96h):

Tensile strength velocity of variation 13.6%, elongation change rate 23.3%.

Claims (2)

1. a light flame-retardant silicon rubber, is characterized in that what it was made up of the raw material of following weight parts:

Methyl vinyl phenyl silicon rubber 100-113, protohemine 0.6-1, polydicyclopentadiene 3-5, microencapsulated powder oil 2-4,4,4 '-OBSH 1-2, fibrolite powder 3-5, light calcium carbonate 30-34, two ten four carbon alcohols ester 2-3, polyhexamethylene guanidine 0.6-1, silicon nitride 1-2, tetrafluoroethylene wax 2-3, antioxidant 4010NA 0.6-1, aluminium dihydrogen phosphate 2-3, rare-earth additive 3-4, vulcanizing agent pdm 1-2;

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. a preparation method for light flame-retardant silicon rubber as claimed in claim 1, is characterized in that comprising the following steps:

(1) two ten four carbon alcohols esters are mixed with polyhexamethylene guanidine, add aluminium dihydrogen phosphate after stirring, at 60-65 DEG C, be uniformly mixed 3-6 minute, add microencapsulated powder oil, be stirred to normal temperature, obtain composite flame-proof auxiliary agent;

(2) tetrafluoroethylene wax is mixed with light calcium carbonate, at 70-80 DEG C, be uniformly mixed 5-10 minute, add above-mentioned composite flame-proof auxiliary agent, be stirred to normal temperature;

(3) by each raw material mixing after above-mentioned process, add protohemine, stir, at 80-90 DEG C, be uniformly mixed 5-10 minute, then add methyl vinyl phenyl silicon rubber, put in mill evenly mixing, add each raw material except vulcanizing agent pdm, adjustment roll spacing is to 1-2mm, and thin-pass 8-10 time, is uniformly dispersed, add each raw material of residue, mold pressing sulfidization molding at the temperature of 150-200 DEG C, curing time is 5-20 minute, obtains described light flame-retardant silicon rubber.