CN1321152C - Concentrated sulfuric acid resistant fluoro-rubber sealing spacer - Google Patents
Concentrated sulfuric acid resistant fluoro-rubber sealing spacer Download PDFInfo
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- CN1321152C CN1321152C CNB2005100406393A CN200510040639A CN1321152C CN 1321152 C CN1321152 C CN 1321152C CN B2005100406393 A CNB2005100406393 A CN B2005100406393A CN 200510040639 A CN200510040639 A CN 200510040639A CN 1321152 C CN1321152 C CN 1321152C
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- sulfuric acid
- concentrated sulfuric
- acid resistant
- rubber sealing
- sealing spacer
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Abstract
The present invention relates to a concentrated sulfuric acid resistant fluororubber sealing gasket which is characterized in that the present invention is composed of raw materials of the following proportion by weight: 60 to 65 of tetrafluoroethlene propylene rubber, 35 to 40 of 23 type fluororubber, 2.5 to 2.8 of dicumyl peroxide, 4 to 4.5 of triallylisocyanurate, 15 to 18 of spraying carbon black, 15 to 18 of barium sulfate and 2 to 2.2 of lubricating agents. The present invention is a concentrated sulfuric acid resistant fluororubber sealing gasket with the advantages of concentrated sulfuric acid resistance, good elasticity and low compression deformation.
Description
Technical field:
The present invention relates to a kind of gasket seal, be specifically related to a kind of concentrated sulfuric acid resistant fluoro-rubber sealing spacer.The plate-type heat exchanger that is mainly used in vitriol oil cooling post is made sealing member.Belong to the sealing member technical field.
Background technology:
The plate-type heat exchanger that is used for vitriol oil cooling post is made up of three big parts: interchanger framework, ripple heat exchanger fin and 4 third fluoro-rubber sealing spacers.And gasket seal also is one of parts of plate-type heat exchanger most critical, and it should concentrated sulfuric acid resistant, keeps good elasticity and lower compression set again, and to guarantee that interchanger keeps complete sealed state in longer use, equipment can have leakage and normally moves.
Before the present invention made, conventional 4 third fluororubber pads that are used for plate-type heat exchanger mainly were made up of following composition raw material: 4 third viton, dicumyl peroxide, triallylcyanurate, spray carbon black and Zinc Stearate.The sizing material of making by this prescription is through compression molding, and promptly is applied to the plate-type heat exchanger assembling after the secondary hot air treatment.After using, find, this backing is under the vitriol oil and compressive action, can normally use in preceding 18 months, it is more that pad weightlessness just took place after 18 months, compression set is difficult to guarantee that greater than the assembling requirement of plate-type heat exchanger pad continues normal the use, and shimming costs an arm and a leg again, it is bigger to change a maintenance cost, so limited the application of plate-type heat exchanger at sulfuric acid industry.
Summary of the invention:
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of should concentrated sulfuric acid resistant, keep the concentrated sulfuric acid resistant fluoro-rubber sealing spacer of good elasticity and lower compression set again.
The object of the present invention is achieved like this: a kind of concentrated sulfuric acid resistant fluoro-rubber sealing spacer is characterized in that it is made up of the raw material of following weight part:
4 third viton 60～65
23 type fluorine glue 35～40
Dicumyl peroxide 2.5～2.8
Triallylcyanurate 4～4.5
Spray carbon black 15～18
Barium sulfate 15～18
Lubricant 2～2.2.
Concentrated sulfuric acid resistant fluoro-rubber sealing spacer of the present invention, described lubricant preferably adopts polyethylene wax.
But 4 third viton concentrated sulfuric acid resistants, manufacturability is also better, but anti-strongly-acid is good not as good as 23 type fluorine glue.But the processing performance of 23 type fluorine glue is poor, can't extrusion moulding, so adopt the blend of two kinds of fluorine glue, carried out performance complement, and both solved the processing performance of material, strengthened the resistance to concentrated acids energy of backing simultaneously greatly.Because 4 third viton and 23 type fluorine glue are glue kinds of two kinds of xenogenesis opposed polarities, so preferably be added with 0.5～0.7 part tackifying assistant in the raw material.Described tackifying assistant is by pitch and resin is mixed forms, and both mixed weight ratios are 1: 2～5.The structural formula of described resin is:
In addition, the spray carbon black in the starting material partly changes transfers the good barium sulfate of part concentrated sulfuric acid resistant performance, has further increased pad patience performance, has reduced the weightlessness in the pad use.
Improved pad after using in 3 years, and pad still remains intact state, pad hardness step-down phenomenon behind the no acid etching, substantially not weightless, compression set is satisfied the assembling requirement of heat exchanger fully less than 28%, can guarantee that seal degree is good, pad continues can use more than 2 years even 2 years after the reuse.
Embodiment:
Embodiment 1:
Get 60 parts of 4 third viton, 40 parts in 23 type fluorine glue, 2.5 parts of vulcanizing agent dicumyl peroxides, 4.5 parts of cocuring agent triallylcyanurate, 15 parts of filler spray carbon blacks, 2 parts in 18 parts in filler barium sulfate and lubricant polyethylene wax, place a container for stirring to mix after, through compression molding, and promptly get the concentrated sulfuric acid resistant fluoro-rubber sealing spacer finished product after the secondary hot air treatment.
Embodiment 2:
Get 65 parts of 4 third viton, 35 parts in 23 type fluorine glue, 2.8 parts of dicumyl peroxides, 4 parts of triallylcyanurate, 18 parts of spray carbon blacks, 2.2 parts of 15 parts in barium sulfate and polyethylene waxs, place a container for stirring to mix after, through compression molding, and promptly get the concentrated sulfuric acid resistant fluoro-rubber sealing spacer finished product after the secondary hot air treatment.
Embodiment 3:
Get 63 parts of 4 third viton, 38 parts in 23 type fluorine glue, 2.6 parts of dicumyl peroxides, 4.3 parts of triallylcyanurate, 17 parts of spray carbon blacks, 0.6 part of 16 parts in barium sulfate, 2.1 parts of polyethylene waxs and thickening auxiliary agent, place a container for stirring to mix after, through compression molding, and promptly get the concentrated sulfuric acid resistant fluoro-rubber sealing spacer finished product after the secondary hot air treatment.Described tackifying assistant is by pitch and resin is mixed forms, and this is 1: 2～5 for both mixed weight.The structural formula of described resin is:
Annotate:
A kind of rubbery copolymer [rubber industry handbook revised edition first fascicle that 23 type viton system is made with suspension polymerization by vinylidene and trifluorochloroethylene, the 606th page of rubber and framework material, Chemical Industry Press, Xie Suizhi, Liu Dengxiang, week ring mountains in a range, 1998 the 3rd printings in Beijing in June].
Polyethylene wax is the low molecular weight polyethylene between the molecular-weight average 1500～5000.White powder.About relative density 0.9, about 101 ℃～110 ℃ of softening temperature.Function: rubber, plastics are with lubricator.Compare with other hydro carbons lubricant, its internal lubrication effect is stronger.Be applicable to and extrude and rolling processing.But anti is improved filler or dispersing of pigments.
Claims (3)
1, a kind of concentrated sulfuric acid resistant fluoro-rubber sealing spacer is characterized in that it is made up of the raw material of following weight part:
4 third viton 60～65
23 type fluorine glue 35～40
Dicumyl peroxide 2.5～2.8
Triallylcyanurate 4～4.5
Spray carbon black 15～18
Barium sulfate 15～18
Lubricant 2～2.2.
2, a kind of concentrated sulfuric acid resistant fluoro-rubber sealing spacer according to claim 1, it is characterized in that: described lubricant is a polyethylene wax.
3, a kind of concentrated sulfuric acid resistant fluoro-rubber sealing spacer according to claim 1 and 2, it is characterized in that: the tackifying assistant that is added with 0.5～0.7 part in the raw material, described tackifying assistant is by pitch and resin is mixed forms, both mixed weight ratios are 1: 2～5, and the structural formula of described resin is:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100406393A CN1321152C (en) | 2005-06-20 | 2005-06-20 | Concentrated sulfuric acid resistant fluoro-rubber sealing spacer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100406393A CN1321152C (en) | 2005-06-20 | 2005-06-20 | Concentrated sulfuric acid resistant fluoro-rubber sealing spacer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1699463A CN1699463A (en) | 2005-11-23 |
| CN1321152C true CN1321152C (en) | 2007-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100406393A Active CN1321152C (en) | 2005-06-20 | 2005-06-20 | Concentrated sulfuric acid resistant fluoro-rubber sealing spacer |
Country Status (1)
| Country | Link |
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| CN (1) | CN1321152C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067403B (en) * | 2007-05-29 | 2010-06-02 | 南昌大学 | Technology for producing new viton coating metal sealing gasket for internal combustion engine use |
| CN102617959A (en) * | 2011-03-30 | 2012-08-01 | 中国石油化工股份有限公司 | Sulfur-resistant rubber composition |
| CN102250437B (en) * | 2011-06-29 | 2013-04-03 | 中国石油大学(北京) | Acidproof, alkali-proof and hydrogen-sulphide-corrosion-resistant aflas composite |
| CN103408873A (en) * | 2013-07-01 | 2013-11-27 | 芜湖市银鸿液压件有限公司 | Corrosion-resistant terafluoroethylene-propylene rubber/chlorosulfonated polyethylene rubber sealing gasket and preparation method thereof |
| CN103665675B (en) * | 2013-11-15 | 2016-04-13 | 安徽宏发节能设备有限公司 | Gasket material that a kind of good airproof performance intensity is high and preparation method thereof |
| CN107001751B (en) * | 2014-11-28 | 2019-08-13 | Ａｇｃ株式会社 | Fluoro-rubber composite and crosslinked fluororubber article |
| CN105111642B (en) * | 2015-07-30 | 2017-10-20 | 巨化集团技术中心 | A kind of 4 third fluorubber with low compression set performance and preparation method thereof |
| CN105175903B (en) * | 2015-07-30 | 2018-06-26 | 巨化集团技术中心 | A kind of modified rubber addition auxiliary agent and preparation method thereof |
| CN105419178A (en) * | 2015-11-30 | 2016-03-23 | 安徽锦洋氟化学有限公司 | Fluororubber material used for seal gaskets of engines |
| CN105419176A (en) * | 2015-11-30 | 2016-03-23 | 安徽锦洋氟化学有限公司 | Modified fluororubber material for flange gasket |
| CN105820482A (en) * | 2016-05-24 | 2016-08-03 | 中国航空工业集团公司北京航空材料研究院 | Tetrafluoroethylene-propylene rubber material and preparation method thereof |
| CN113717482A (en) * | 2021-08-16 | 2021-11-30 | 浙江峻和科技股份有限公司 | Super-medium-resistant post-processor rubber tube, preparation process thereof and rubber tube assembly |
Citations (4)
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| CN1008495B (en) * | 1986-07-24 | 1990-06-20 | 重庆钢铁公司设计院 | Digital control microcomputer control system for crossed change frequency of bi-feed motor |
| CN1009921B (en) * | 1986-07-25 | 1990-10-10 | 株式会社上野制药应用研究所 | Prepn. of 2-hydroxynaphthalene-6-carboxylic acid |
| WO2002092683A1 (en) * | 2001-05-15 | 2002-11-21 | Dupont Dow Elastomers L.L.C. | Curable base-resistant fluoroelastomers |
| WO2003029306A1 (en) * | 2001-09-26 | 2003-04-10 | Nichias Corporation | Moldings of fluororubbers and process for their production |
-
2005
- 2005-06-20 CN CNB2005100406393A patent/CN1321152C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1008495B (en) * | 1986-07-24 | 1990-06-20 | 重庆钢铁公司设计院 | Digital control microcomputer control system for crossed change frequency of bi-feed motor |
| CN1009921B (en) * | 1986-07-25 | 1990-10-10 | 株式会社上野制药应用研究所 | Prepn. of 2-hydroxynaphthalene-6-carboxylic acid |
| WO2002092683A1 (en) * | 2001-05-15 | 2002-11-21 | Dupont Dow Elastomers L.L.C. | Curable base-resistant fluoroelastomers |
| WO2003029306A1 (en) * | 2001-09-26 | 2003-04-10 | Nichias Corporation | Moldings of fluororubbers and process for their production |
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| Publication number | Publication date |
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| CN1699463A (en) | 2005-11-23 |
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