HK1086587B - A self-lubricating organic-silicone rubber material, the preparation process and use thereof - Google Patents
A self-lubricating organic-silicone rubber material, the preparation process and use thereof Download PDFInfo
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- HK1086587B HK1086587B HK06106422.9A HK06106422A HK1086587B HK 1086587 B HK1086587 B HK 1086587B HK 06106422 A HK06106422 A HK 06106422A HK 1086587 B HK1086587 B HK 1086587B
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Description
Technical Field
The invention relates to an organic silicon rubber material, in particular to a self-lubricating organic silicon rubber material containing a self-lubricating solid additive. The invention also relates to a preparation method of the silicon rubber material and application of the silicon rubber material in the aspect of automobile windshield wipers.
Background
The windshield wiper on the automobile windshield can clean the windshield and improve the driving sight in rain, snow and other weather. The traditional windshield wiper is made of natural rubber materials, and is easy to age due to poor weather resistance of the natural rubber materials, so that the windshield wiper cannot be well cleaned and rainwater cannot be removed in a short time, and the windshield wiper can bounce and generate noise.
Many attempts have been made to solve the above problems. For example, various coatings are applied to the rubber surface to improve the rubber-to-glass contact surface, thereby enhancing the cleaning effect. Attempts have also been made to use silicone rubber instead of conventional rubber because silicone rubber itself has good weather resistance and can prevent aging, but the silicone rubber generates great friction with glass, resulting in difficulty in application.
TW412487 discloses a silicone rubber wiper blade which is based on silicone rubber, and contains a fluorine-containing compound and minute glass beads to improve the disadvantage of excessive friction between silicone rubber and glass. However, the addition of the glass balls causes mixing difficulty, and how to bond the glass balls and the silicone rubber is also one of the problems. In addition, whether the glass ball is broken after being added and whether the safety problem of the windshield wiper is caused needs to be solved.
WO 03/050191 discloses an abrasion-reducing wiper blade using a material comprising a methyl vinyl siloxane polymer, a filler and an abrasion-reducing additive such as PTFE (polytetrafluoroethylene) or the like. Although the addition of a certain amount of PTFE can reduce friction, the plasticity of the material is enhanced, so that the extrusion and molding are difficult or even impossible.
Disclosure of Invention
The inventors of the present invention have surprisingly found that a self-lubricating silicone rubber material can be obtained by mixing a silicone rubber with a self-lubricating solid additive while adding other auxiliary components. The silicon rubber material has excellent self-lubricating property, is convenient to prepare, overcomes the defects in the prior art, and has wide application prospect.
An object of the present invention is to provide an organic silicone rubber material having self-lubricating properties.
Another object of the present invention is to provide a method for preparing the silicone rubber material.
It is yet another object of the present invention to provide products made from the self-lubricating silicone rubber materials of the present invention.
The invention provides a self-lubricating organic silicon rubber material which comprises organic silicon rubber, a self-lubricating additive, a filler and a vulcanizing agent, and optionally a release agent and a pigment.
The invention also provides a method for preparing the self-lubricating organic silicon rubber material, which comprises the following steps: the silicone rubber, the self-lubricating additive and the filler are mixed, and then a vulcanizing agent, optionally a mold release agent and optionally a pigment are added to the resulting mixture.
The present invention will be explained in detail below.
Silicone rubber:
the silicone rubber suitable for use in the present invention is not particularly limited, and silicone rubbers conventionally used in the art can be used in the present invention.
The silicone rubbers preferably used are those with methyl, vinyl or combinations thereof end groups, for example:
Me3SiO(Me2SiO)nSiMe3；
Me3SiO(Me2SiO]n(MeViSiO)mSiMe2R；
RMe2SiO(Me2SiO)n(MePhSiO)l(MeViSiO)mSiMe3；
Me3SiO[Me(CF3CH2CH2)SiO]nSiMe3，
wherein Me represents a methyl group; n, m and l, which may be the same or different, represent an integer greater than 0; r represents methyl or vinyl; vi denotes a vinyl group.
The silicone rubber may be present in the self-lubricating silicone rubber material of the present invention in an amount of 10 to 70 weight percent, preferably 30 to 60 weight percent, based on the total weight of the self-lubricating silicone rubber material.
Self-lubricating additive:
self-lubricating additives are those which impart self-lubricating properties to silicone rubber to reduce friction between the silicone rubber and glass and/or to allow the silicone rubber to slide in contact with glass without generating run-out and noise.
Self-lubricating additives suitable for use in the present invention may be selected from graphite, fluorine-containing compounds, boron nitride, dimethyl silicone oil, methyl hydrogen silicone oil, ethyl silicone oil, vinyl silicone oil, stearates and mixtures thereof. Preferred self-lubricating additives are selected from the group consisting of graphite fluoride, teflon powder, methyl hydrogen silicone oil, vinyl silicone oil, zinc stearate, barium stearate, and mixtures thereof.
The content of the self-lubricating additive is not particularly limited as long as the material can be imparted with the desired self-lubricating property. Generally, the content of the self-lubricating additive may be 2% to 30%, preferably 3% to 20% by weight based on the total weight of the self-lubricating silicone rubber material.
Filling:
known fillers that improve the mechanical properties of silicone rubbers are suitable for use in the present invention, such as those known for reinforcing fillers. Fillers preferably used in the present invention include synthetic fine silica powder, natural quartz powder, diatomaceous earth, kaolin, and the like.
The filler content may be 20% to 70%, preferably 30% to 60% by weight of the total weight of the self-lubricating silicone rubber material.
Vulcanizing agent:
known vulcanizing agents may be used in the present invention. Preferred vulcanizing agents include various organic peroxides. Benzoyl peroxide is preferably used in the present invention.
Generally, 1-2% by weight of vulcanizing agent based on the total weight of the self-lubricating silicone rubber material is required to be added.
Releasing agent:
release agents known in the art may be used in the present invention. The amount can be determined by one of ordinary skill in the art based on his or her own general knowledge.
Pigment:
according to the color requirement, various commercially available pigments which are suitable for being added into the organic silicon rubber can be added. The amount can be determined by a person skilled in the art on the basis of his own general knowledge and the requirements made on the color.
The self-lubricating silicone rubber of the invention can be prepared by the following method:
(1) adding organic silicon rubber, a self-lubricating additive and a filler into an internal mixer for mixing;
(2) adding a vulcanizing agent, an optional release agent and an optional pigment to the mixture obtained in the step (1);
(3) standing the mixture obtained in the step (2); and
(4) optionally, forming the product obtained in step (3) into a desired article.
Specifically, the silicone rubber, the self-lubricating additive and the filler are added to an internal mixer, mixed uniformly, and left to stand for 1 to 24 hours to sufficiently disperse the self-lubricating additive in the filler, and then the mixture thus obtained is added to an open mill, and the vulcanizing agent, optionally the mold release agent and optionally the pigment are added to mix them. The mixture thus obtained was allowed to stand for 12 hours or more to disperse the vulcanizing agent uniformly.
The self-lubricating organic silicon rubber material can be prepared into a required product by a conventional molding or extrusion method.
The self-lubricating silicone rubber material can be used in various places needing self-lubricating materials, such as various glass cleaning tools, self-lubricating pipes such as peristaltic pump pipes and the like.
The self-lubricating organic silicon rubber material is particularly suitable for automobile wipers. The automobile windshield wiper made of the self-lubricating organic silicon rubber has excellent self-lubricating property and water repellency, can well clean the surface of glass without generating water marks, and prevents the windshield wiper from jumping and sounding. In addition, the windshield wiper prepared in the way has very excellent temperature resistance, ultraviolet resistance, ozone resistance and the like, thereby having ideal stability, weather resistance and aging resistance, and enabling the windshield wiper to have excellent self-lubricating cleaning performance and not to be a short-term consumable. The following table compares the characteristics of a conventional wiper blade with those of the wiper blade of the present invention:
| common windshield wiper | The invention relates to a windshield wiper | |
| Weather resistance | Difference (D) | Jia |
| Water repellency | Go and can | Self-moistening water-drawing device |
| Jumping property | Go and can | Is free of |
| Windshield wiper color | Black color | Is adjustable |
Detailed Description
The general preparation steps are as follows:
adding a certain amount of organic silicon rubber, the self-lubricating additive and the filler into an internal mixer, uniformly mixing the organic silicon rubber, the self-lubricating additive and the filler, and standing for 24 hours to fully disperse the self-lubricating additive in the filler. Then, this mixture was added to an open mill, an appropriate amount of a vulcanizing agent, a mold release agent and a pigment were further added, mixed thoroughly, and the resulting mixture was allowed to stand for 24 hours.
The examples listed in the table below were operated according to the general preparation procedure described above:
QT-040U: produced by Yingcommercially Kangda scientific and technical International Inc., and is commercially available;
QT-060U: produced by Yingcommercially Kangda scientific and technical International Inc., and is commercially available;
QT-080U: produced by Yingcommercially Kangda scientific and technical International Inc., and is commercially available;
MD-188A: a mixture of a fluorochemical compound and a stearate salt, commercially available from taiwan xinzhongji;
QA-850B: manufactured by uk kanda scientific international limited, commercially available;
PD-30: 30 μ calcined kaolin, manufactured by Liyang electronics, Inc., is commercially available.
And (3) self-lubricating effect test:
the self-lubricating silicone rubber material prepared in the above examples was molded to obtain a finished product. After the finished product is kept stand and is exposed to the sun for 1 to 2 weeks, the surface of the finished product still has water and grease which are slight and has lubricating feeling.
The above-described embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Those skilled in the art can make various changes and modifications to the present invention without departing from the spirit of the present invention, and such changes and modifications are also within the scope of the present invention.
Claims (24)
1. A self-lubricating organic silicon rubber material comprises organic silicon rubber, a self-lubricating additive, a filler and a vulcanizing agent, wherein the self-lubricating additive is selected from graphite fluoride, teflon powder, methyl hydrogen silicone oil, vinyl silicone oil, zinc stearate, barium stearate and a mixture thereof.
2. The material of claim 1, further comprising a release agent.
3. The material of claim 1, further comprising a pigment.
4. The material of any of claims 1-3, wherein the self-lubricating additive is MD-188A.
5. The material of any of claims 1-3, wherein the filler is selected from the group consisting of quartz powder, kaolin, and mixtures thereof.
6. A material as claimed in any one of claims 1 to 3 wherein the filler is kaolin.
7. The material of any one of claims 1-3, wherein the vulcanizing agent is benzoyl peroxide.
8. The material of any one of claims 1-3, wherein the silicone rubber comprises 10-70% by weight of the total weight of the self-lubricating silicone rubber material.
9. The material of any one of claims 1-3, wherein the self-lubricating additive comprises 2-30% by weight of the total weight of the self-lubricating silicone rubber material.
10. The material of any one of claims 1-3, wherein the self-lubricating additive comprises 3-20% by weight of the total weight of the self-lubricating silicone rubber material.
11. The material of any one of claims 1-3, wherein the filler comprises 20-70% by weight of the total weight of the self-lubricating silicone rubber material.
12. A method of preparing the self-lubricating silicone rubber material of claim 1, comprising the steps of: mixing organic silicon rubber, a self-lubricating additive and a filler, wherein the self-lubricating additive is selected from graphite fluoride, teflon powder, methyl hydrogen silicone oil, vinyl silicone oil, zinc stearate, barium stearate and a mixture thereof, and then adding a vulcanizing agent into the obtained mixture.
13. The method of claim 12, further comprising adding a release agent to the resulting mixture.
14. The method of claim 12, further comprising adding a pigment to the resulting mixture.
15. The method of any one of claims 12-14, further comprising the steps of:
(1) adding the organic silicon rubber, the self-lubricating additive and the filler into an internal mixer, mixing, and standing for 1-24 hours;
(2) adding the mixture obtained in the step (1) into an open mill, adding a vulcanizing agent, a release agent and a pigment into the open mill, and mixing; and
(3) allowing the mixture obtained in step (2) to stand for 12 hours or more.
16. The method of any one of claims 12-14, wherein the self-lubricating additive is MD-188A.
17. The method of any of claims 12-14, wherein the filler is selected from the group consisting of quartz powder, kaolin, and mixtures thereof.
18. The method of any of claims 12-14, wherein the filler is kaolin.
19. The method of any one of claims 12-14, wherein the vulcanizing agent is benzoyl peroxide.
20. The method of any one of claims 12-14 wherein the silicone rubber comprises 10-70% by weight of the total weight of the self-lubricating silicone rubber material.
21. The method of any one of claims 12-14, wherein the self-lubricating additive comprises 2-30% by weight of the total weight of the self-lubricating silicone rubber material.
22. The method of any one of claims 12-14, wherein the self-lubricating additive comprises 3-20% by weight of the total weight of the self-lubricating silicone rubber material.
23. The method of any one of claims 12-14, wherein the filler comprises 20-70% by weight of the total weight of the self-lubricating silicone rubber material.
24. An automobile wiper made of the self-lubricating silicone rubber material as recited in any one of claims 1 to 11.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410048973A CN1706888B (en) | 2004-06-11 | 2004-06-11 | Self-lubricating organic silicon rubber material, preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| HK1086587A1 HK1086587A1 (en) | 2006-09-22 |
| HK1086587B true HK1086587B (en) | 2010-12-17 |
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