CN103396637A - Fluororubber sealing ring - Google Patents

Abstract

The invention discloses a fluororubber sealing ring composed of the following raw materials in parts by weight: 90-100 parts of fluororubber 23, 10-12 parts of fluorite nanopowder, 4-6 parts of celestite powder, 4-5 parts of polyurethane, 2-3 parts of magnesium oxide, 4-5 parts of chlorinated paraffin, 1-2 parts of hexabromocyclododecane, 1-2 parts of anti-aging agent MB, 0.6-1 part of Imarcaptoacetate dioctyltin, 1-2 parts of trimethoxypropylsilane, 2-3 parts of sodium polyacrylate, 0.1-0.2 part of eucalyptus oil, 15-20 parts of reinforcing agent and 0.8-1 part of sulfur S-80. The sealing ring produced by the invention has excellent heat, oil, corrosion, aging, tearing, stretching and ozone resistance and the like; and through adding the reinforcing agent, the binding force of all raw material components is enhanced, and the hardness, the stress at definite elongation and other physical performances are remarkably improved.

Description

A kind of viton seal ring

Technical field

The present invention relates generally to a kind of sealing-ring, relates in particular to a kind of viton seal ring.

Background technology

Viton has the chemical stability of height, is present best a kind of of medium-resistance in all elastomericss.The anti-petroleum base oils of 26 type viton, di-esters oil, silicon ethers oil, silicic acid class oil, inorganic acid resistance, the organic and inorganic solvent of anti-majority, medicine etc., only not anti-low molecular ketone, ether, ester, not anti-amine, ammonia, hydrofluoric acid, chlorsulfonic acid, phosphoric acid class hydraulic efficiency oil.The dielectric behavior of 23 type fluorine glue is similar to 26 types, and unique distinction is more arranged, and the mineral acid of its powerful oxidation corrosion resistance such as nitrosonitric acid, vitriol oil Performance Ratio 26 types are good, and at room temperature in 98% HNO3, its volumetric expansion of dipping 27 days is only 13% ~ 15%.

The resistance to elevated temperatures of viton is the same with silicon rubber, can be described as in present elastomerics best.But 26-41 fluorine glue life-time service under 250 ℃, 300 ℃ of lower short-terms are used; 246 fluorine glue are heat-resisting not worse than 26-41.After the physical property of 26-41 after 300 ℃ * 100 hours air thermal ageings and hot air aging in 300 ℃ * 100 hours, the performance of 246 types is suitable, and its tensile yield can remain on 100% left and right, hardness 90 ~ 95 degree.246 types keep favorable elasticity 350 ℃ of hot air agings after 16 hours, 400 ℃ of hot air agings, keep favorable elasticity after 110 minutes, after 400 ℃ of hot air agings 110 minutes, the sizing material elongation that contains spray carbon black, thermals or carbon fiber rises approximately 1/2 ~ 1/3, strength degradation 1/2 left and right, still keep good elasticity.23-11 type fluorine glue can be at 200 ℃ of lower life-time service, and 250 ℃ of lower short-terms are used.

Viton has fabulous anti-weather-aging property, ozone resistance.According to reports, the VitonA of DuPont exploitation performance after natural storage 10 years is still satisfactory, at ozone concn, is through not obviously be full of cracks of effect in 45 days in 0.01% air.The Weather-resistant of 23 type viton, ozone resistance are also fabulous.

Viton has good physical and mechanical properties.The general brute force that coordinates of 26 type viton is between 10 ~ 20MPa, and tensile yield is between 150 ~ 350%, and tearing toughness is between 3 ~ 4KN/m.23 type viton brute forces are between 15.0 ~ 25MPa, and elongation is 200% ~ 600%, and tearing toughness is between 2 ~ 7MPa.Usually, viton compression set at high temperature is large, if but with the same terms relatively, compression set as the same equal time under 150 ℃, fourth and chloroprene rubber are all large than 26 type fluorine glue, and the compression set of 26 type viton under 200 ℃ * 24 hours is equivalent to fourth rubber the compression set of 150 ℃ * 24 hours.

Summary of the invention

The object of the invention just is to provide a kind of viton seal ring.

The present invention is achieved by the following technical solutions:

A kind of viton seal ring, it is comprised of the raw material of following weight parts:

Fluororubber 23 90-100, nanometer Fluorspar Powder 10-12, celestite powder 4-6, polyurethane(s) 4-5, magnesium oxide 2-3, clorafin 4-5, hexabromocyclododecane 1-2, antioxidant MB 1-2, Imarcaptoacetate dioctyltin 0.6-1, propyl trimethoxy silicane 1-2, sodium polyacrylate 2-3, Oil of Eucalyptus 0.1-0.2, strengthening agent 15-20, Sulfur S-80 0.8-1;

Described strengthening agent is comprised of the raw material of following weight parts:

Polypropylene (T30S) powder 90-100, hexagonal boron nitride 3-4, alum powder 2-3, ethylene group bis-stearamides 1-2, turps 0.8-1, Γ-aminopropyl triethoxysilane 1-2, whiteruss 3-4;

Above-mentioned ethylene group bis-stearamides is heated to 130-140 ℃, add Γ-aminopropyl triethoxysilane, hexagonal boron nitride, insulated and stirred reaction 10-20 minute, will add after turps, alum powder, polypropylene (T30S) powder mixing and stirring, be cooled to normal temperature, 1500-1600 rev/min is disperseed 6-8 minute, and the dropping liquid paraffin body dropwises rear 90-100 ℃ of insulation 1-2 hour, cooling rear ball milling, oven dry, granulation, particle diameter is 0.1-0.2 μ m.

A kind of preparation method of viton seal ring comprises the following steps:

Above-mentioned celestite powder is mixed with clorafin, heating 4-6 minute under 80-90 ℃, add propyl trimethoxy silicane, be cooled to normal temperature, add nanometer Fluorspar Powder, sodium polyacrylate hexabromocyclododecane, Oil of Eucalyptus, 300-400 rev/min is disperseed 3-4 minute, adds each raw material of residue except Sulfur S-80, Imarcaptoacetate dioctyltin, mixing, compression moulding; Rubber mass after moulding is joined in the mould in vulcanizing equipment, add each raw material of residue, carry out sulfidizing, time-temperature is 180-190 ℃, and curing time is 280-300s; Deburring, check, packing, warehouse-in, obtain described viton seal ring.

Advantage of the present invention is:

The superior performances such as the sealing-ring that the present invention produces is heat-resisting, oil resistant, corrosion-resistant, anti-aging, anti tear, stretch-proof, anti-ozone, by adding strengthening agent of the present invention, strengthened the bonding force with each material composition, the physicalies such as hardness stress at definite elongation all are significantly improved.

Embodiment

Embodiment 1

A kind of viton seal ring, it is comprised of the raw material of following weight parts (kilogram):

Fluororubber 23 100, nanometer Fluorspar Powder 12, celestite powder 6, polyurethane(s) 5, magnesium oxide 3, clorafin 5, hexabromocyclododecane 2, antioxidant MB 2, Imarcaptoacetate dioctyltin 0.6, propyl trimethoxy silicane 1, sodium polyacrylate 3, Oil of Eucalyptus 0.2, strengthening agent 20, Sulfur S-80 0.8;

Described strengthening agent is comprised of the raw material of following weight parts:

Polypropylene (T30S) powder 100, hexagonal boron nitride 3, alum powder 3, ethylene group bis-stearamides 2, turps 0.8, Γ-aminopropyl triethoxysilane 2, whiteruss 4;

Above-mentioned ethylene group bis-stearamides is heated to 140 ℃, add Γ-aminopropyl triethoxysilane, hexagonal boron nitride, insulated and stirred reaction 20 minutes, will add after turps, alum powder, polypropylene (T30S) powder mixing and stirring, be cooled to normal temperature, 1600 rev/mins were disperseed 6 minutes, and the dropping liquid paraffin body dropwises rear 100 ℃ of insulations 1 hour, cooling rear ball milling, oven dry, granulation, particle diameter is 0.2 μ m.

A kind of preparation method of viton seal ring comprises the following steps:

Above-mentioned celestite powder is mixed with clorafin, under 90 ℃, heating is 6 minutes, add propyl trimethoxy silicane, be cooled to normal temperature, add nanometer Fluorspar Powder, sodium polyacrylate hexabromocyclododecane, Oil of Eucalyptus, 400 rev/mins were disperseed 4 minutes, and added each raw material of residue except Sulfur S-80, Imarcaptoacetate dioctyltin, mixing, compression moulding; Rubber mass after moulding is joined in the mould in vulcanizing equipment, add each raw material of residue, carry out sulfidizing, time-temperature is 190 ℃, and curing time is 300s; Deburring, check, packing, warehouse-in, obtain described viton seal ring.

Performance test

Claims (2)

1. viton seal ring is characterized in that what it was comprised of the raw material of following weight parts:

Fluororubber 23 90-100, nanometer Fluorspar Powder 10-12, celestite powder 4-6, polyurethane(s) 4-5, magnesium oxide 2-3, clorafin 4-5, hexabromocyclododecane 1-2, antioxidant MB 1-2, Imarcaptoacetate dioctyltin 0.6-1, propyl trimethoxy silicane 1-2, sodium polyacrylate 2-3, Oil of Eucalyptus 0.1-0.2, strengthening agent 15-20, Sulfur S-80 0.8-1;

Described strengthening agent is comprised of the raw material of following weight parts:

Polypropylene (T30S) powder 90-100, hexagonal boron nitride 3-4, alum powder 2-3, ethylene group bis-stearamides 1-2, turps 0.8-1, Γ-aminopropyl triethoxysilane 1-2, whiteruss 3-4;

Above-mentioned ethylene group bis-stearamides is heated to 130-140 ℃, add Γ-aminopropyl triethoxysilane, hexagonal boron nitride, insulated and stirred reaction 10-20 minute, will add after turps, alum powder, polypropylene (T30S) powder mixing and stirring, be cooled to normal temperature, 1500-1600 rev/min is disperseed 6-8 minute, and the dropping liquid paraffin body dropwises rear 90-100 ℃ of insulation 1-2 hour, cooling rear ball milling, oven dry, granulation, particle diameter is 0.1-0.2 μ m.

2. the preparation method of a viton seal ring as claimed in claim 1 is characterized in that comprising the following steps:

Above-mentioned celestite powder is mixed with clorafin, heating 4-6 minute under 80-90 ℃, add propyl trimethoxy silicane, be cooled to normal temperature, add nanometer Fluorspar Powder, sodium polyacrylate hexabromocyclododecane, Oil of Eucalyptus, 300-400 rev/min is disperseed 3-4 minute, adds each raw material of residue except Sulfur S-80, Imarcaptoacetate dioctyltin, mixing, compression moulding; Rubber mass after moulding is joined in the mould in vulcanizing equipment, add each raw material of residue, carry out sulfidizing, time-temperature is 180-190 ℃, and curing time is 280-300s; Deburring, check, packing, warehouse-in, obtain described viton seal ring.