CN1786066A - Super strong acid resistant rubber material and its preparation method - Google Patents
Super strong acid resistant rubber material and its preparation method Download PDFInfo
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- CN1786066A CN1786066A CN 200510012987 CN200510012987A CN1786066A CN 1786066 A CN1786066 A CN 1786066A CN 200510012987 CN200510012987 CN 200510012987 CN 200510012987 A CN200510012987 A CN 200510012987A CN 1786066 A CN1786066 A CN 1786066A
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Abstract
The present invention discloses a rubber material with super acid-proof and wear-resistant performance and its preparation method. Its raw material composition includes chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, fluororubber, teflon, zinc methylacrylate, magnesium methylacrylate, carbon black, filler, oligomeric ester, vulcanizing agent and accelerating agent. Besides, said invention also provides the concrete steps and requirements of its preparation method.
Description
Technical field
The present invention relates to a kind of specialty elastomer and preparation method thereof, specifically a kind of elastomeric material that tolerates super acids and preparation method thereof.
Technical background
In industrial production, many equipment work-pieces must carry out work in the super acids medium state.As employed rubber roll in the stainless steel production line, line with rubber pad in the anticorrosion equipment or the like.At present, the general equal etch that tolerates common strong acid media of the elastomeric material that these workpiece adopted, then tolerance is relatively poor to mix the super acids that forms for multiple strong acid (as nitric acid, hydrochloric acid, hydrofluoric acid etc.).
Summary of the invention
Purpose of the present invention just provides a kind of super strong acid resistant and the good elastomeric material of wear resistance, and a kind of method for preparing this rubber is provided simultaneously.
First purpose of the present invention is achieved in that
Raw material of the present invention is formed and is comprised chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, viton, tetrafluoroethylene, zinc methacrylate, magnesinm methacrylate and carbon black, oligomer ester, vulcanizing agent, promotor and filler, and the weight proportion of its each component is:
70～80 parts of chlorosulfonated polyethylene rubbers; 20～30 parts of chlorinated polyethylene rubbers; 10～15 parts of viton; 2～4 parts of tetrafluoroethylene; 5～10 parts of zinc methacrylates; 3～6 parts of magnesinm methacrylates; 15～60 parts of carbon blacks; 5～35 parts of fillers; 5～20 parts of oligomer esters; 2～3 parts of vulcanizing agents; 0.5～2 part of promotor.
The weight part ratio of the preferred chlorosulfonated polyethylene rubber of the present invention, chlorinated polyethylene rubber, viton is 70 parts, 30 parts, 10 parts.
The weight part ratio of the more preferred chlorosulfonated polyethylene rubber of the present invention, chlorinated polyethylene rubber, viton is 75 parts, 25 parts, 15 parts.
The selected filler of the present invention is preferably silica powder or barium sulfate or superfine talcum powder or by its mixture of forming, its consumption also can suitably increase and decrease according to the purposes of made rubber.
Carbon black preferred for this invention is the mixture of N220 carbon black or N220 carbon black and N110 carbon black composition.
The used vulcanizing agent of the present invention can be the thiuram vulcanizing agent, and preferred vulcanizing agent is TRA.
The used promotor of the present invention can be selected thiazole accelerator for use, as MC, MK, DM, and wherein preferred DM.
Can also add vulcanization activators such as yellow lead oxide, stearic acid in the rubber compounding of the present invention, with the degree of crosslinking of further raising rubber of the present invention.
Can also add brightening agent (as rosin) in the rubber compounding of the present invention, with the intermolecular sliding of strongthener.
Chlorosulfonated polyethylene rubber preferred for this invention is CSM-40.
Above-mentioned raw materials is the commercially available prod.
Second purpose of the present invention is achieved in that
Preparation method of the present invention may further comprise the steps:
A, take by weighing each component by above-mentioned raw materials and weight proportion;
B, chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, viton are placed Banbury mixer, under 160～170 ℃ of conditions, time 4min～10min plasticates; Add tetrafluoroethylene under 160～170 ℃ of conditions, time 4min～6min plasticates; Add zinc methacrylate, magnesinm methacrylate, carbon black, filler, oligomerisation fat,, shut down, turn over warehouse discharging at 155～165 ℃ of 6～8min that plasticate, cool to using below 65 ℃;
C, add vulcanizing agent, promotor in mill, under≤65 ℃ of conditions, after material feeding finishes, stamp triangle Bao Si time, thin-pass is six times under roll spacing 0.5～0.8mm, and following sheet 3～4mm is thick, stand-by.
Sulfuration rerum natura of the present invention is 150 ℃ * 30mim.
It is crosslinked that the present invention adopts chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, viton and polytetrafluoroethylene powder to carry out rubber and plastic, obtained superb cross-linking density, and the coordinating and unifying of integral formulation, further improved the cross-linking density of rubber and plastic; The shortcoming that wherein adding of oligomer ester and zinc methacrylate, magnesinm methacrylate is big from the compression set that another side has solved rubber-plastics material, elastic force is little, improved simultaneously rubber and plastic cross-linking density, solved the big problem of extraction of DOP phosphorus benzene bis-acid potassium dioctyl ester; Rubber intensity and super strong acid resistant thereof and wear resistance have also been significantly improved; Also strengthened the binding property (its anti-can improve 9%) of elastomeric material and 45# steel in addition from intensity.
Can also add brightening agent in the present invention's prescription, as rosin, with the intermolecular sliding of strongthener.
Adopt the elastomeric material of such scheme preparation, have superpower acidproof, wear resistance, the equipment work-piece that the particularly suitable manufacturing is worked under the multiple strong acid admixture of being everlasting is as rubber roll, liner, gasket or the like.
Elastomeric material of the present invention its performance after testing is:
Relative density: 1.47～1.7; Shao Shi intensity 58～107; Tensile strength 19.6mpa～22mpa;
Elastic force 32～38%; Tensile yield 150～510%; Akron abrasion 0.052/cm
285 ℃ of working temperatures; Acid resistance is extremely strong; Gel content 〉=43.1%.
Elastomeric material of the present invention immerses in the mixed solution of the vitriol oil, nitric acid, three kinds of acid of hydrofluoric acid (reagent stoste) (volume ratio of three kinds of acid is 1: 1: 1), temperature by boiling point-74 ℃ condition under, soaked 7 days, with 20 times of magnifying glasses observations, no abnormality seen.Under 72 ℃ of conditions, continue to soak 20 days after, observe no abnormality seens with 40 times of magnifying glasses.
Adopt the rubber roll of elastomeric material preparation of the present invention, 4 months no abnormality seens of in the titanium steel production line, working.
Volume change was after various acidic mediums were immersed in the present invention after testing:
| Soak various media (14 days) back volume change: 22 ℃ 70 ℃ | ||
| Chromic acid 50% | +1％ | -1.8％ |
| Chromic acid 20% | -0.7％ | +5％ |
| Hydrochloric acid 38% | +1.7％ | +8.9％ |
| Nitric acid 38% | +2.2％ | +29.9％ |
| The vitriol oil | +3.1％ | (50℃)+11.3％ |
| The vitriol oil 50% | 0 | (70℃)-0.3％ |
| Clorox | -0.3％ | -0.2％ |
Embodiment
Embodiment 1
A, take by weighing chlorosulfonated polyethylene rubber (CSM-40) 70kg; Chlorinated polyethylene rubber CM-352L) 30kg; Viton (fKM-2463) 10kg; Tetrafluoroethylene 4kg; Zinc methacrylate 10kg; Magnesinm methacrylate 5kg; N220 carbon black 20kg; Silica powder 20kg; Barium sulfate 5kg; Superfine talcum powder 5kg; Rosin 10kg; Stearic acid 0.5kg; TP-95 oligomer ester 5kg; TRA vulcanizing agent 2.5kg; DM promotor 0.5kg; Yellow lead oxide 10kg.
B, with chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, viton places Banbury mixer, at 165 ℃, time 10min plasticates; Add tetrafluoroethylene, rosin at 160 ℃ of 4min that plasticate; Add zinc methacrylate, magnesinm methacrylate, stearic acid, carbon black and superfine talcum powder, silica powder, barium sulfate, oligomerisation fat,, shut down, turn over warehouse discharging at 160 ℃ of 6min that plasticate, cool to using below 65 ℃.
C, add altax, vulcanizing agent TRA, vulcanization activator yellow lead oxide in mill, under 60 ℃ of conditions, after material feeding finishes, stamp triangle Bao Si time, thin-pass is six times under roller hard iron 0.5～0.8mm, and 3～4mm sheet is stand-by down.
The rubber of preparation can be used for preparing rubber roll.After testing, its relative density 1.7; 83 ° of Shao Shi intensity; Tensile strength 19.6mpa; Elastic force 32%; Tensile yield 300%; Akron abrasion 0.052/cm
285 ℃ of working temperatures; Acid resistance is extremely strong; Gel content 43.1%.
Embodiment 2～6 sees the following form:
The preparation method of embodiment 2-6 is identical with embodiment 1, and just processing parameter and feed composition consumption are different, but all have effect of the present invention.
Claims (9)
1, a kind of super elastomeric material of anti-strong acid is characterized in that it contains the raw material of following weight part ratio:
70～80 parts of chlorosulfonated polyethylene rubbers; 20～30 parts of chlorinated polyethylene rubbers; 10～15 parts of viton; 2～4 parts of tetrafluoroethylene; 5～10 parts of zinc methacrylates; 3～6 parts of magnesinm methacrylates; 15～60 parts of carbon blacks; 5～30 parts of fillers; 5～20 parts of oligomer esters; 2～3 parts of vulcanizing agents; 0.5～2 part of promotor.
2, the super elastomeric material of anti-strong acid according to claim 1, the weight part ratio that it is characterized in that described chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, viton are 70 parts, 30 parts, 10 parts.
3, the super elastomeric material of anti-strong acid according to claim 1, the weight part ratio that it is characterized in that described chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, viton are 75 parts, 25 parts, 15 parts.
4,, it is characterized in that described filler is silica powder or barium sulfate or superfine talcum powder or by its mixture of forming according to claim 1, the 2 or 3 described super elastomeric materials of anti-strong acid.
5,, it is characterized in that described carbon black is the mixture of N220 carbon black or N220 carbon black and N110 carbon black composition according to claim 1, the 2 or 3 described super elastomeric materials of anti-strong acid.
6,, it is characterized in that described vulcanizing agent is the TRA vulcanizing agent according to claim 1, the 2 or 3 described super elastomeric materials of anti-strong acid.
7,, it is characterized in that described chlorosulfonated polyethylene rubber is CSM～40 according to claim 1, the 2 or 3 described super elastomeric materials of anti-strong acid.
8,, it is characterized in that containing in the described raw material weight part ratio and be 0～20 part vulcanization activator according to claim 1, the 2 or 3 described super elastomeric materials of anti-strong acid.
9, a kind of method for preparing the super elastomeric material of anti-strong acid is characterized in that it may further comprise the steps:
A, take by weighing each component by described raw material of claim 1 and weight proportion;
B, chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, viton are placed Banbury mixer, under 160～170 ℃ of conditions, time 4min～10min plasticates; Add polytetrafluoroethylene powder under 160～170 ℃ of conditions, time 4min～6min plasticates; Add zinc methacrylate, magnesinm methacrylate, carbon black, filler, oligomerisation fat,, shut down, turn over warehouse discharging at 155～165 ℃ of 6min～8min that plasticate, cool to using below 65 ℃;
C, add vulcanizing agent, vulcanization activator in mill, under≤65 ℃ of conditions, after material feeding finishes, stamp triangle Bao Si time, thin-pass is six times under roll spacing 0.5～0.8mm, and 3～4mm sheet is stand-by down.
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