CN103937439B - A kind of liquid locking fluid sealant of precoating type threaded fastener - Google Patents
A kind of liquid locking fluid sealant of precoating type threaded fastener Download PDFInfo
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- CN103937439B CN103937439B CN201310024063.6A CN201310024063A CN103937439B CN 103937439 B CN103937439 B CN 103937439B CN 201310024063 A CN201310024063 A CN 201310024063A CN 103937439 B CN103937439 B CN 103937439B
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- threaded fastener
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Abstract
The present invention provides a kind of liquid locking fluid sealant of precoating type threaded fastener, solves the locking fluid sealant quantity for spray of existing threaded fastener and problem that coating thickness is difficult to control.A kind of liquid locking fluid sealant of precoating type threaded fastener, by weight percentage, including: alcohol-soluble nylon 1 ~ 50%, acrylic resin 0 ~ 50%, polyvinyl acetate 0 ~ 50%, filler 0 ~ 10%, pigment 0 ~ 1%, viscosity thixotropic agent 0 ~ 5%, solvent 30 ~ 70%.The present invention is directed to conventional melt painting method to improve, be formed with the liquid nylon mixture of certain viscosity, in that context it may be convenient in room temperature state by being coated with, dripping, the method such as leaching is attached to bolt thread surface, plays effect that is locking and that seal.
Description
Technical field
The present invention relates to that the screw fastener of non-mechanical means is locking, technical field of sealing technology, particularly to a kind of liquid locking fluid sealant of precoating type threaded fastener.
Background technology
Bolt or screw can be described as ubiquitous as a kind of securing member, but because the reasons such as shock and vibration are faced with loosening danger.For threaded fastener, engineering circles is devoted to the research of two aspects always.The first improves its bearing capacity；It two is locking.Before chemistry locking and Sealing Technology occur, people once adopted multiple locking design, as locked spacer, split pin, thread interference or interference deform, and added spring washer and used internal damping nut etc..These mechanical means are all increase parts, improve based on machining accuracy, result in the increase of cost.Moreover still cannot loosen from basic prevention, more cannot avoid the seepage at screw thread place, and chemistry fastens the appearance with Sealing Technology, solves an above-mentioned difficult problem well.
It is low that chemistry locking locking relatively mechanical means has cost, the feature that efficiency of assembling is high, is used widely in automobile, electronic assemblies field.The chemistry engineering resin material such as locking employing nylon least, it is attached on thread face by special processed, make screw bolt and nut produce frictional force by extrusion resin material in locking process, thus the frictional force added between thread, form the resistance to shock and vibration.
The hard nylon that the primary screw of practicality such as present electronic assemblies such as mobile phone, notebook computer, panel computer etc. and glasses etc. is commonly used is locking.Being sprayed on screw after melted for nylon powder, the method can only spray a bit on screw or half cycle, quantity for spray and coating thickness control difficulty.
Summary of the invention
The present invention provides a kind of liquid locking fluid sealant of precoating type threaded fastener, solves the locking fluid sealant quantity for spray of existing threaded fastener and problem that coating thickness is difficult to control.
The technical scheme is that and be achieved in that: a kind of liquid locking fluid sealant of precoating type threaded fastener, by weight percentage, including alcohol-soluble nylon 1 ~ 50%, acrylic resin 0 ~ 50%, polyvinyl acetate 0 ~ 50%, filler 0 ~ 10%, pigment 0 ~ 1%, viscosity thixotropic agent 0 ~ 5%, solvent 30 ~ 70%.
Wherein it is preferred to, described a kind of liquid locking fluid sealant of precoating type threaded fastener by weight percentage, including alcohol-soluble nylon 10 ~ 30%, acrylic resin 10 ~ 30%, filler 0 ~ 10%, pigment 0 ~ 1%, viscosity thixotropic agent 0 ~ 5%, solvent 30 ~ 70%.
Wherein it is preferred to, described a kind of liquid locking fluid sealant of precoating type threaded fastener by weight percentage, including alcohol-soluble nylon 10 ~ 30%, polyvinyl acetate 10 ~ 30%, filler 0 ~ 10%, pigment 0 ~ 1%, viscosity thixotropic agent 0 ~ 5%, solvent 30 ~ 70%.
Wherein it is preferred to, described filler is glass fibre micropowder or glass microballoon.
Wherein it is preferred to, described viscosity thixotropic agent is aerosil.
Wherein it is preferred to, described solvent is methanol or the mixed solvent of methanol, trichloro ethylene.
Alcohol-soluble nylon used in the present invention, has another name called polycaprolactam, ((NH(CN2) 5CO) n), commodity turn to polyamide 6 or nylon six, for translucent or opaque creamy white crystals shape polymer, there is thermoplasticity, good toughness, there is after coating scratch wear-resisting, resistance to, oil resistant, chemical-resistant resistance.
The acrylic resin that this method adopts is main body by esters of acrylic acid, methyl acrylic ester, is aided with functional acrylic ester, by the resin that combined polymerization is formed.
The amorphous polymer that the present invention adopts polyvinyl acetate to be polymerized by vinyl acetate and obtains.Belong to thermoplastic resin.Molecular weight 20,000～200,000.Colourless latex or water white transparency pearl solid can be prepared with polymerization difference.Solid relative density 1.19；Refractive index 1.47；Glass transition temperature 28～40 DEG C；Hot strength 34MPa；Dielectric constant (103Hz) 1.15；Water absorption 2%～5%.It is dissolved in aromatic hydrocarbons, ketone, alcohol, ester and chloroform.Adhesion is strong, resistance to diluted acid, diluted alkaline.Stablize under sunlight and 125 DEG C of temperature.
Add glass fibre micropowder in the present invention or glass microballoon can improve temperature tolerance and coating hardness.
Add pigment in the present invention to be easy to different bolts are carried out labelling, also can conveniently check whether coated coating.
Add aerosil in the present invention and adjust the viscosity of mixture, be coated operation to facilitate in different occasions.
The method of the liquid locking fluid sealant of precoating type threaded fastener of the preparation present invention is made up of following step successively:
(1) dissolve adding in methanol at alcohol-soluble nylon temperature more than 50 DEG C, stir；
(2) polyvinyl acetate is added at normal temperatures in methanol and dissolve, stir；Or acrylic resin is added at normal temperatures dissolving in trichloro ethylene, stir；
(3) by two kinds of solution mixing of step 1 and step 2 gained, add filler, pigment and viscosity thixotropic agent, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
The present invention prepares the organic solvent solution of alcohol-soluble nylon, acrylic resin or polyvinyl acetate mixing, this solution is coated between the thread of bolt, volatilization along with solvent, one layer of resilient coating of densification of thread surface attachment at bolt, bolts and nuts assembling process is deformed by extruding, thus forming frictional force, prevent and treat because impact or vibration generation get loose.
Advantages of the present invention:
1. comparing traditional melted spray process mode, it is not necessary to high-temperature (generally wanting more than 200 DEG C) especially, safe operation process is high, and energy consumption reduces.
2. the mixture physical property that prepared by this method is stable, it is possible to bottling stores, transport, facilitates user to adopt leaching according to oneself bolt feature, drip, be coated with operation, it is also possible to add solvent dilution, allotment according to screw size oneself.
3. the mixture that prepared by this method forms 360 degree of coatings on thread surface, except locking, chemically-resistant, has excellent weather resistance, has Packed function.
4. scribble mixture prepared by this method bolt can Reusability, the repeatable operation of more than 5 times can be carried out at most.
Detailed description of the invention
Below the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
The nylon trade mark that in following example, alcohol-soluble nylon adopts is Du PontThe 60# nylon of PA6 or Yixing chemical reagent work, what acrylic resin adopted is LP64/12, what polyvinyl acetate adopted isB-100。
Embodiment 1
The alcohol-soluble nylon of 15 weight portions is added at the temperature of 55 DEG C in the methanol of 30 weight portions and dissolve, stir；The acrylic resin of 12 weight portions is added at normal temperatures in the trichloro ethylene of 36.5 weight portions and dissolve, stir；Above two solution is mixed, adds the aerosil of the glass fibre micropowder of 5 weight portions, the pigment of 0.5 weight portion and 1 weight portion, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
Embodiment 2
The alcohol-soluble nylon of 15 weight portions is added at the temperature of 60 DEG C in the methanol of 60 weight portions and dissolve, stir；Add the polyvinyl acetate of 15 weight portions, stir；Add the aerosil of the glass microballoon of 8.5 weight portions, the pigment of 0.5 weight portion and 1 weight portion, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
Embodiment 3
The alcohol-soluble nylon of 20 weight portions is added at the temperature of 60 DEG C in the methanol of 60 weight portions and dissolve, stir；Add the polyvinyl acetate of 10 weight portions, stir；Add the aerosil of the glass fibre micropowder of 7 weight portions, the pigment of 0.5 weight portion and 2.5 weight portions, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
Embodiment 4
The alcohol-soluble nylon of 30 weight portions is added at the temperature of 55 DEG C in the methanol of 50 weight portions and dissolve, stir；Add the polyvinyl acetate of 7 weight portions, stir；Add the aerosil of the glass microballoon of 8 weight portions, the pigment of 1 weight portion and 4 weight portions, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
Embodiment 5
The alcohol-soluble nylon of 10 weight portions is added at the temperature of 65 DEG C in the methanol of 60 weight portions and dissolve, stir；Add the polyvinyl acetate of 20 weight portions, stir；Add the aerosil of the glass fibre micropowder of 5 weight portions, the pigment of 1 weight portion and 4 weight portions, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
Embodiment 6
The alcohol-soluble nylon of 20 weight portions is added at the temperature of 60 DEG C in the methanol of 40 weight portions and dissolve, stir；The acrylic resin of 10 weight portions is added at normal temperatures in the trichloro ethylene of 20 weight portions and dissolve, above two solution is mixed, add the aerosil of the glass microballoon of 7 weight portions, the pigment of 0.5 weight portion and 2.5 weight portions, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
Embodiment 7
The alcohol-soluble nylon of 30 weight portions is added at the temperature of 65 DEG C in the methanol of 45 weight portions and dissolve, stir；The acrylic resin of 5 weight portions is added at normal temperatures in the trichloro ethylene of 10 weight portions and dissolve, above two solution is mixed, add the aerosil of the glass fibre micropowder of 8.5 weight portions, the pigment of 0.5 weight portion and 1 weight portion, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
Embodiment 8
The alcohol-soluble nylon of 10 weight portions is added at the temperature of 55 DEG C in the methanol of 20 weight portions and dissolve, stir；The acrylic resin of 20 weight portions is added at normal temperatures in the trichloro ethylene of 40 weight portions and dissolve, above two solution is mixed, add the aerosil of the glass microballoon of 5 weight portions, the pigment of 1 weight portion and 4 weight portions, stir, obtain the described liquid locking fluid sealant of precoating type threaded fastener.
Take the liquid locking fluid sealant of precoating type threaded fastener that above-mentioned 8 embodiments prepare respectively, be coated with respectively owing to, on the steel bolt of M3, drying 20 minutes at 70 DEG C, being cooled to room temperature and make precoating bolt.Fit on nut on precoating bolt, cold curing 24 ~ 72 hours, recording first time, to screw in the back-out moment of torsion of moment and continuous 5 times as follows: (IFI-524TestProcedureforthePerformanceofMetricNonmetallic ResistantElementPrevailing-TorqueScrews) (U.S.'s securing member association IFI-524 metric system bolt adopts nonmetal anti-loose method torsion-testing specification)
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (3)
1. the liquid locking fluid sealant of precoating type threaded fastener, it is characterised in that composed of the following components by weight percentage: alcohol-soluble nylon 10～30%, polyvinyl acetate 10～30%, filler 0～10%, pigment 0～1%, viscosity thixotropic agent 0～5%, solvent 30～70%.
2. a kind of liquid locking fluid sealant of precoating type threaded fastener according to claim 1, it is characterised in that: described filler is glass fibre micropowder or glass microballoon；Described solvent is methanol or the mixed solvent of methanol, trichloro ethylene.
3. a kind of liquid locking fluid sealant of precoating type threaded fastener according to claim 1, it is characterised in that: described viscosity thixotropic agent is aerosil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310024063.6A CN103937439B (en) | 2013-01-22 | 2013-01-22 | A kind of liquid locking fluid sealant of precoating type threaded fastener |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310024063.6A CN103937439B (en) | 2013-01-22 | 2013-01-22 | A kind of liquid locking fluid sealant of precoating type threaded fastener |
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| CN103937439A CN103937439A (en) | 2014-07-23 |
| CN103937439B true CN103937439B (en) | 2016-06-29 |
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| CN201310024063.6A Active CN103937439B (en) | 2013-01-22 | 2013-01-22 | A kind of liquid locking fluid sealant of precoating type threaded fastener |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107029969A (en) * | 2016-11-15 | 2017-08-11 | 安徽江淮汽车集团股份有限公司 | Compartment spraying coating process |
| CN113105858A (en) * | 2021-04-12 | 2021-07-13 | 惠州鸿为新材料科技有限公司 | Nylon glue for preventing screw from loosening |
| CN113999584A (en) * | 2021-11-15 | 2022-02-01 | 长春中科应化特种材料有限公司 | Preparation method of anti-loosening marking paste containing polysilazane bolt |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948417A (en) * | 2006-11-09 | 2007-04-18 | 郭英 | Sealant and its preparation method |
| WO2008138021A2 (en) * | 2007-05-10 | 2008-11-20 | Isovolta Ag | Use of polyamide as an encapsulating material for photovoltaic modules |
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2013
- 2013-01-22 CN CN201310024063.6A patent/CN103937439B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948417A (en) * | 2006-11-09 | 2007-04-18 | 郭英 | Sealant and its preparation method |
| WO2008138021A2 (en) * | 2007-05-10 | 2008-11-20 | Isovolta Ag | Use of polyamide as an encapsulating material for photovoltaic modules |
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| CN103937439A (en) | 2014-07-23 |
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Address after: 264000 No. 2 Changsha Street, Yantai Economic and Technological Development Zone, Shandong Province Patentee after: Yantai Hailitai Adhesive Material Co., Ltd. Address before: 264000 Heilongjiang Road, Yantai Development Zone, Shandong Province Patentee before: YANTAI HAITAI CHEMICAL ENGINEERING TECHNOLOGY CO., LTD. |
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