CN101906285B - High-adhesion polysulfide sealant - Google Patents
High-adhesion polysulfide sealant Download PDFInfo
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- CN101906285B CN101906285B CN2010102755826A CN201010275582A CN101906285B CN 101906285 B CN101906285 B CN 101906285B CN 2010102755826 A CN2010102755826 A CN 2010102755826A CN 201010275582 A CN201010275582 A CN 201010275582A CN 101906285 B CN101906285 B CN 101906285B
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Abstract
The invention discloses a high-adhesion polysulfide sealant, which comprises base paste and vulcanizing paste. The base paste comprises 30 to 70 percent of liquid polysulfide rubber, 20 to 60 percent of filler, 0.5 to 10 percent of thickener, 5 to 20 percent of plasticizer and 0 to 5 percent of assistant, wherein the thickener polyvinyl butyral and adjusting the adhesive property of the sealant. The vulcanizing paste comprises 25 to 70 percent of vulcanizing agent, 25 to 70 percent of plasticizer and 0.5 to 5 percent of vulcanization accelerator. The mixing weight ratio of the base paste to the vulcanizing paste is 100:6-14. The invention also discloses a method for preparing the polysulfide sealant. The sealant and the method are characterized in that: the polyvinyl butyral is used as the thickener; the adhesive strength of the polysulfide sealant is improved; the use cost of the materials is low; the process is stable; and the repeatability is high. The material of the invention can be used for adhering sealing parts of airplanes, rapid trains, automobiles and the like. Therefore, the sealant has a high industrial application value.
Description
Technical field
The invention belongs to the sealer technical field, particularly a kind of high-adhesion polysulfide glue sealing material and preparation method thereof.
Background technology
The elasticity thiorubber mixture that forms through sulfuration is widely used as sealer in industries such as traffic, building and petrochemical compleies.Known polysulfide rubber sealant normally is matrix with the liquid polysulfide rubber, adds an amount of filler, auxiliary agent and solidifying agent, the two component sealing materials that form through mechanically mixing.In the industrial production in modern times, particularly in the production of bullet train and aircraft, require sealer to have sealing and bonding dual-use function, require sealer to have performances such as ageing-resistant, antifatigue and flexibility be good simultaneously.Known bullet train and automobile sealed glue adopt polyurethanes mostly, and easy construction has good comprehensive performances, but the polyurethanes sealer, and anti-solvent, resistance to weathering can be relatively poor, thereby have limited its application.
Polysulfide sealant itself all has certain cohesiveness to various materials, but its cohesiveness but is not fine.For improving the cohesiveness of elasticity polysulfide sealant, need to add tackifier.Tackifier commonly used comprise resol and bisphenol A type epoxy resin because these materials can produce chemical bond with the band bonding surface in the thiol group functional group of gathering sulphur glue, and its cohesiveness will be higher than common mechanical effect.Jin Gengshuan discloses with bisphenol A type epoxy resin and coupling agent in Chinese patent (ZL 200610150004.3) polysulfide sealant has been carried out modification, obtains the polysulfide sealant of 100% cohesive failure.But up to now, Shang Weijian has the report that adopts polyvinyl butyral acetal to increase the polysulfide sealant adhesive property.
Summary of the invention
The object of the present invention is to provide a kind of have a high-adhesion gather sulphur class sealer and preparation method thereof.
A kind of high-adhesion polysulfide sealant, its main ingredient comprise basic cream and sulfuration cream:
Base cream comprises following component (by weight percentage):
Liquid polysulphide rubber: 30～70%;
Filler: 20～60%;
Tackifier: 0.5～10%;
Softening agent: 5～20%;
Auxiliary agent: 0～5%.
Described liquid polysulfide rubber is the matrix of sealer; Tensile strength and elongation at break adjustment after its molecular-weight average vulcanizes according to sealer; Increase molecular weight and can improve tensile strength; Reduce molecular weight and then can improve elongation at break, can select molecular-weight average for use is one or more the liquid mixture in the liquid polysulfide rubber of 1000-7000; Preferred molecular-weight average is 4000 liquid polysulfide rubber.
Described filler is one or more the mixture in nano-calcium carbonate, light calcium carbonate, white titanium pigment and the carbon black, is preferably the mixture of nano-calcium carbonate, light calcium carbonate and white titanium pigment, and its blending ratio is not limit.Nano-calcium carbonate and light calcium carbonate are the main stuffing and the strengthening agents of polysulfide sealant, and its pH value of general requirement is about 10.Carbon black is also born the function of black colorant as good strengthening agent.
Described tackifier are polyvinyl butyral acetal (PVB), and preferably selecting weight-average molecular weight for use is the product of 30000-90000.PVB has good high and low temperature resistance, and duraluminum and unorganic glass are had good adhesive property.
Described softening agent is Witcizer 300, butyl benzyl phthalate or clorafin.
Described auxiliary agent comprises: anti-sag agent-gas-phase silica; Stablizer-calcium stearate.
The characteristics of polysulfide sealant of the present invention are in proportioning, to have added the PVB tackifier.The PVB tackifier can increase the internal cohesive energy of gathering sulphur glue, are the good tackifier of thiorubber.
Sulfuration cream comprises following component (by weight percentage):
Vulcanizing agent: 25～70%;
Softening agent: 25～70%;
Vulcanization accelerator: 0.5～5%;
Described vulcanizing agent is Manganse Dioxide, plumbic oxide, calcium superoxide, ZPO or organo-peroxide, is preferably Manganse Dioxide.Manganse Dioxide can be realized the room temperature-vulcanized possibility of thiorubber, and thermotolerance is superior to plumbic oxide, is the main vulcanizing agent of thiorubber, and its pH value should be slightly acidic between 6-8.
Described promotor is selected vulkacit D for use.Vulkacit D can be accelerated sulfidation, is the general promotor of liquid polysulfide rubber.
Selecting for use of softening agent with basic cream.
When above-mentioned high-adhesion polysulfide sealant uses, can prepare by following method:
1) preparation of basic cream: in the ratio of each component in the prescription of basic cream, the weight of each component of weighing base cream; The mixing of materials that takes by weighing is even, grind repeatedly until obtaining even paste;
2) preparation of sulfuration cream: in the ratio of each component in the prescription of sulfuration cream, the weight of each component of weighing sulfuration cream; The mixing of materials that takes by weighing is even, grind repeatedly until obtaining even paste.
3) basic cream is 100: 6～14 with the weight ratio that is mixed of sulfuration cream.
Can adopt common mill or Banbury mixer to carry out mechanically mixing during preparation, allocating technology is simple, is convenient to mass production.
Binding type polysulfide sealant of the present invention can be implemented bonding and sealing to multiple metal, non-metallic material, is applicable to the sealing of aviation, high-speed train body and high-grade automobile etc.Through the component fine setting, be suitable under Various Seasonal, varying environment condition, using.
Embodiment
Below in conjunction with case study on implementation the present invention is further specified.
Embodiment 1-6
6 kinds of formulation of employing table 1 are gathered sulphur glue bond agent.
Base cream (A component) with vulcanize cream (B component) dispose respectively, mixing.
During the weighing of base cream starting material, solid material such as first weighing nano-calcium carbonate, light calcium carbonate, white titanium pigment, carbon black, gas-phase silica, liquid material such as weighing liquid polysulfide glue again; After the aforesaid liquid material mixes, mix with the load weighted solid material in front respectively in order again, fully wetting.
During the configuration of sulfuration cream, first weighing Manganse Dioxide and softening agent mix; Other components of weighing are fully wetting after the mixing again.
The amount of vulkacit D is regulated by different environments for use, suitably increases its usage quantity during low temperature, and the adjustment curing cycle is about 7 days.
All raw material is fully wetting, stirs after the mixing polysulfide sealant of processing is respectively charged in the sealed vessel in component and ratio, and sealing is stored in dry shady and cool place.
The prescription of table 1 case study on implementation (component weighing unit: g)
The test-results of table 2 case study on implementation prescription
Visible by table 2, to improve and performance test through the proportioning of 6 tests, the performance index of test meet the demands basically, 2 the best results of wherein filling a prescription.
Polysulfide sealant of the present invention has good bond effect (100% cohesive failure) and mechanical property (tensile strength >=1.3MPa; Elongation at break >=250%); Can realize bonding and sealing function simultaneously; Satisfy HS and the ageing-resistant requirement of aviation, bullet train and high-grade automobile, possess good low-temperature bending performance sealing material.
Claims (4)
1. a high-adhesion polysulfide sealant comprises basic cream and sulfuration cream, it is characterized in that:
With the weight percent meter of basic cream gross weight, basic cream comprises:
Liquid polysulfide rubber: 30～70%;
Filler: 20～60%;
Tackifier: 0.5～10%;
Softening agent: 5～20%;
Auxiliary agent: 0～5%;
Described liquid polysulfide rubber is that molecular-weight average is one or more the liquid mixture in the liquid polysulfide rubber of 1000-7000;
Described filler is one or more the mixture in nano-calcium carbonate, light calcium carbonate, white titanium pigment and the carbon black;
Described tackifier are polyvinyl butyral acetal; The weight-average molecular weight of described polyvinyl butyral acetal is 30000-90000;
Described softening agent is a kind of in Witcizer 300, butyl benzyl phthalate or the clorafin;
Described auxiliary agent is the mixture of gas-phase silica and calcium stearate;
With the weight percent meter of sulfuration cream gross weight, sulfuration cream comprises
Vulcanizing agent: 25～70%;
Softening agent: 25～70%;
Vulcanization accelerator: 0.5～5%;
Described vulcanizing agent is Manganse Dioxide, plumbic oxide, calcium superoxide, ZPO or organo-peroxide;
Described softening agent is Witcizer 300, butyl benzyl phthalate or clorafin;
Described promotor is vulkacit D;
Base cream is 100: 6～14 with the weight ratio that is mixed of sulfuration cream.
2. high-adhesion polysulfide sealant according to claim 1 is characterized in that: the molecular-weight average of described liquid polysulfide rubber is 4000.
3. high-adhesion polysulfide sealant according to claim 1 is characterized in that: described filler is the mixture of nano-calcium carbonate, light calcium carbonate and white titanium pigment.
4. high-adhesion polysulfide sealant according to claim 1 is characterized in that: described softening agent is a butyl benzyl phthalate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102755826A CN101906285B (en) | 2010-09-08 | 2010-09-08 | High-adhesion polysulfide sealant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102755826A CN101906285B (en) | 2010-09-08 | 2010-09-08 | High-adhesion polysulfide sealant |
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| Publication Number | Publication Date |
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| CN101906285A CN101906285A (en) | 2010-12-08 |
| CN101906285B true CN101906285B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102755826A Expired - Fee Related CN101906285B (en) | 2010-09-08 | 2010-09-08 | High-adhesion polysulfide sealant |
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Families Citing this family (16)
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| CN102250470B (en) * | 2011-06-09 | 2013-01-30 | 广东科顺化工实业有限公司 | Dynamic sealant and preparation method thereof |
| CN102850990B (en) * | 2011-07-01 | 2014-08-13 | 上海渊信建筑材料有限公司 | Nano-filler modified bi-component polysulfide hollow glass elastic sealant and its preparation method |
| CN102329595B (en) * | 2011-08-10 | 2013-05-08 | 浙江大学 | High-strength polysulfide sealant |
| CN102838964B (en) * | 2012-08-29 | 2014-01-08 | 浙江大学 | High-weather-fastness polysulfide sealant |
| CN103555264B (en) * | 2013-10-11 | 2014-11-26 | 中国航空工业集团公司北京航空材料研究院 | High peeling strength polysulfide sealant and sealing method |
| CN104762055A (en) * | 2015-03-16 | 2015-07-08 | 如皋市滨江城建投资有限公司 | Waterproof building glue |
| CN104762054A (en) * | 2015-03-16 | 2015-07-08 | 如皋市滨江城建投资有限公司 | Novel waterproof building glue |
| CN105440951B (en) * | 2015-11-30 | 2018-08-28 | 中国航空工业集团公司北京航空材料研究院 | A kind of quick drying promoter in polysulfide sealant surface and preparation method thereof |
| CN106046789A (en) * | 2016-07-14 | 2016-10-26 | 安庆师范大学 | Window gap sealing material |
| CN106520058B (en) * | 2016-10-31 | 2019-07-23 | 中国航空工业集团公司北京航空材料研究院 | A kind of graphene nickel composite conductive anticorrosion polysulfide sealant |
| CN106753191A (en) * | 2016-12-28 | 2017-05-31 | 童道庆 | A kind of roof roof waterproof fluid sealant |
| CN108443604B (en) * | 2018-03-30 | 2019-12-17 | 北京世纪永峰防水材料有限公司 | Method for connecting cement pipelines |
| CN109266000A (en) * | 2018-08-16 | 2019-01-25 | 南通通江橡胶制品有限公司 | A kind of high intensity polysulfide rubber and its production technology |
| CN109280532B (en) * | 2018-08-22 | 2021-03-26 | 中国航发北京航空材料研究院 | Polysulfide sealant with designable long construction period |
| CN112523169B (en) * | 2020-11-25 | 2021-12-07 | 郑州中原思蓝德高科股份有限公司 | A waterproof sealing system for concrete structure |
| CN113831889B (en) * | 2021-10-13 | 2023-05-23 | 中国航发北京航空材料研究院 | Polysulfide sealants with low volatile content and low volume change and method of making same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084541A (en) * | 1992-09-19 | 1994-03-30 | 南京大学 | A kind of method that improves rubber and Bond Strength and resistance to boiling water thereof |
| CN101434826A (en) * | 2008-12-12 | 2009-05-20 | 河南永丽化工有限公司 | Preparations of bicomponent PSU type liquid rubber-based sealant and PSU liquid rubber thereof |
-
2010
- 2010-09-08 CN CN2010102755826A patent/CN101906285B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084541A (en) * | 1992-09-19 | 1994-03-30 | 南京大学 | A kind of method that improves rubber and Bond Strength and resistance to boiling water thereof |
| CN101434826A (en) * | 2008-12-12 | 2009-05-20 | 河南永丽化工有限公司 | Preparations of bicomponent PSU type liquid rubber-based sealant and PSU liquid rubber thereof |
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| CN101906285A (en) | 2010-12-08 |
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Granted publication date: 20120704 Termination date: 20210908 |