CN103724703A - Oil-proof leather ring rubber - Google Patents

Abstract

The invention discloses oil-proof leather ring rubber. The oil-proof leather ring rubber is prepared from the following raw materials by weight: 94-88 parts of natural rubber, 8-10 parts of ethylene propylene diene monomer rubber, 1-2 parts of white oil, 1-2 parts of methyl-2,2-dithienyl glycolate, 1-2 parts of epoxy n-butyl oleate, 2-4 parts of dioctyl adipate, 3-5 parts of zinc stearate, 1.5-2.5 parts of antioxidant BZ (Zinc Dibutyldithiocarbamate), 1-2 parts of dicumyl peroxide, 1-2 parts of nanometer barite, 1.2-2.4 parts of sulphur powder, 1.3-2.5 parts of accelerant TMTD (Tetramethylthiuram Disulfide) and 30-50 parts of modified filler. Through the addition of the modified filler and the methyl-2,2-dithienyl glycolate to the formula and the compounding and mixing of all the rubber, the oil-proof performance is improved, and the service life is long.

Description

A kind of oil resistant apron rubber

Technical field

The present invention relates to rubber enclosed field, is exactly a kind of oil resistant apron rubber.

Background technology

The circular cowling that rubber seal apron is comprised of one or several part, be fixed on lasso of bearing or packing ring and contact or form narrow labyrinth clearance with another lasso or packing ring, prevent that lubricating oil from spilling and foreign object is invaded, take rubber elastomer (butyronitrile, viton, silica gel, natural gum and other rubber) as main raw, strengthening cloth (nylon, glass fiber, Nomex (Nomex nylon) and other extraordinary cloth of strengthening) is skeleton, can select different elastomericss and skeleton to be processed into the rubber diaphragm of different thickness according to customer requirement.

Summary of the invention

The object of the present invention is to provide a kind of oil resistant apron rubber.

Above-mentioned purpose realizes by following scheme:

A kind of oil resistant apron rubber, it is characterized in that: it is to be made by the raw material of following weight parts: natural rubber 94-88, terpolymer EP rubber 8-10, white oil 1-2,2,2-dithienyl methyl glycolate 1-2, epoxyoleic acid butyl ester 1-2, Octyl adipate 2-4, Zinic stearas 3-5, antioxidant BZ 1.5-2.5, the different phenylpropyl alcohol 1-2 of peroxidation two, nano barite 1-2, SULPHUR POWDER 1.2-2.4, Vulcanization accelerator TMTD 1.3-2.5, modified filler 30-50;

Described modified filler is made by the raw material of following weight part:

Kaolin 20-25, silica powder 3.5-4.2, manganese naphthenate 1-2, magnesium oxide 1-2, epoxy oleum lini 2.5-3.5, tindioxide 1-3, sodium-acetate 1-3, zinc borate 1-2, Melamine 1.5-2.3, antimonous oxide 6-12, lead sulfate tribasic 1-2;

The preparation method of described modified filler is:

In the hydrogen peroxide that is 10-20% in concentration by kaolin, silica powder, soak 4-6 hour, take out, dry, put into sudden strain of a muscle firing and at 880-950 ℃, dodge burning 2-4 second, take out, the acetic acid solution of putting into 10-15% soaks 3-6 hour, after filtration, deionized water wash 3-4 time, dries, be added to the water, add again epoxy oleum lini, zinc borate, sodium-acetate, Melamine, stir, obtain slurry, spraying is dried to obtain dried powder, then mixes and get final product with surplus stock.

Described a kind of oil resistant apron rubber, is characterized in that: get by weight natural rubber, terpolymer EP rubber fully mixing after, then according to weight part add other raw materials fully the mixing rubber unvulcanizate of obtaining after over cure, obtain product.

Beneficial effect of the present invention is: the present invention is by add modified filler and 2,2-dithienyl methyl glycolate in formula, and the complex compounding of each rubber, has improved oil resistance, long service life.。

Embodiment

A kind of oil resistant apron rubber, it is to be made by the raw material of following weight kg: natural rubber 88, terpolymer EP rubber 8, white oil 2,2,2-dithienyl methyl glycolate 1, epoxyoleic acid butyl ester 2, Octyl adipate 4, Zinic stearas 5, antioxidant BZ 1.8, the different phenylpropyl alcohol 2 of peroxidation two, nano barite 2, SULPHUR POWDER 2.4, Vulcanization accelerator TMTD 2.5, modified filler 38;

Described modified filler is made by the raw material of following weight kg:

Kaolin 25, silica powder 3.8, manganese naphthenate 2, magnesium oxide 1, epoxy oleum lini 3.5, tindioxide 3, sodium-acetate 1, zinc borate 2, Melamine 1.8, antimonous oxide 12, lead sulfate tribasic 2;

The preparation method of described modified filler is:

In the hydrogen peroxide that is 20% in concentration by kaolin, silica powder, soak 6 hours, take out, dry, put into and dodge firing and at 950 ℃, dodges and burn 4 seconds, taking-up, puts into 15% acetic acid solution and soaks 6 hours, after filtration, deionized water wash 4 times, dries, be added to the water, add again epoxy oleum lini, zinc borate, sodium-acetate, Melamine, stir, obtain slurry, spraying is dried to obtain dried powder, then mixes and get final product with surplus stock.

Described a kind of oil resistant apron rubber, get natural rubber, terpolymer EP rubber fully mixing after, then add other raw materials fully the mixing rubber unvulcanizate of obtaining after over cure, obtain product.

The present embodiment tensile strength is 14.8Mpa,

The present embodiment, in 80 ° of C thermostatic baths, is placed 720 hours, below before and after test, changes in hardness 10 is spent;

Cold-hot shock test: the present embodiment is made to sealing-ring and be placed under-20 ° of C and 100 ° of C conditions each 1 hour, and in 200 cycles, its changes in hardness is below 15 degree.

High temperature resistant test: 125 ° of C*164h, outward appearance without distortion, contraction, crackle, be clamminess and separate out phenomenon.

Claims (2)

1. an oil resistant apron rubber, it is characterized in that: it is to be made by the raw material of following weight parts: natural rubber 94-88, terpolymer EP rubber 8-10, white oil 1-2,2,2-dithienyl methyl glycolate 1-2, epoxyoleic acid butyl ester 1-2, Octyl adipate 2-4, Zinic stearas 3-5, antioxidant BZ 1.5-2.5, the different phenylpropyl alcohol 1-2 of peroxidation two, nano barite 1-2, SULPHUR POWDER 1.2-2.4, Vulcanization accelerator TMTD 1.3-2.5, modified filler 30-50;

Described modified filler is made by the raw material of following weight part:

Kaolin 20-25, silica powder 3.5-4.2, manganese naphthenate 1-2, magnesium oxide 1-2, epoxy oleum lini 2.5-3.5, tindioxide 1-3, sodium-acetate 1-3, zinc borate 1-2, Melamine 1.5-2.3, antimonous oxide 6-12, lead sulfate tribasic 1-2;

The preparation method of described modified filler is:

In the hydrogen peroxide that is 10-20% in concentration by kaolin, silica powder, soak 4-6 hour, take out, dry, put into sudden strain of a muscle firing and at 880-950 ℃, dodge burning 2-4 second, take out, the acetic acid solution of putting into 10-15% soaks 3-6 hour, after filtration, deionized water wash 3-4 time, dries, be added to the water, add again epoxy oleum lini, zinc borate, sodium-acetate, Melamine, stir, obtain slurry, spraying is dried to obtain dried powder, then mixes and get final product with surplus stock.

2. a kind of oil resistant apron rubber according to claim 1, is characterized in that: get by weight natural rubber, terpolymer EP rubber fully mixing after, then according to weight part add other raw materials fully the mixing rubber unvulcanizate of obtaining after over cure, obtain product.