CN115491035A - Nontoxic weather-resistant watchband and preparation method thereof - Google Patents
Nontoxic weather-resistant watchband and preparation method thereof Download PDFInfo
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- CN115491035A CN115491035A CN202211119597.2A CN202211119597A CN115491035A CN 115491035 A CN115491035 A CN 115491035A CN 202211119597 A CN202211119597 A CN 202211119597A CN 115491035 A CN115491035 A CN 115491035A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
- C09C1/3661—Coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application relates to the field of rubber materials, and particularly discloses a nontoxic weather-resistant watch strap and a preparation method thereof; the nontoxic weather-resistant watchband comprises the following raw materials in parts by weight: 85-100 parts of silicon rubber, 1-4 parts of hydroxyl silicone oil, 2-6 parts of modified titanium dioxide, 5-10 parts of nano titanium dioxide, 0.5-2 parts of vulcanizing agent and 0.2-1 part of plasticizer; the watch band prepared by the method is non-toxic and has good weather resistance.
Description
Technical Field
The application relates to the field of rubber materials, in particular to a nontoxic weather-resistant watch strap and a preparation method thereof.
Background
Rubber (Rubber) refers to a high-elasticity polymer material with reversible deformation, which is rich in elasticity at room temperature, can generate large deformation under the action of small external force, and can recover the original shape after the external force is removed. The properties of different types of rubber have respective characteristics, and the silicon rubber as one type of rubber refers to rubber of which the main chain is formed by alternating silicon and oxygen atoms, and the silicon oxygen atom is usually connected with two organic groups; the raw rubber types of the silicon rubber mainly include methyl silicon rubber, methyl vinyl silicon rubber, methyl phenyl vinyl silicon rubber and fluorine silicon rubber.
With the popularization of smart watches and sports watches, rubber materials are widely used in the manufacture of watchbands; compared with other rubber materials, the silicon rubber has better high temperature resistance and low temperature resistance, has small irritation to skin and is comfortable to wear, so that the silicon rubber material is more and more widely applied to watchbands.
In view of the above-mentioned related art, the inventor believes that the conventional watchband has poor weather resistance and is likely to be broken or worn after being worn for a long time and being in contact with the external environment.
Disclosure of Invention
In order to improve the weather resistance of the silica gel watchband, the application provides the nontoxic weather-resistant watchband and the preparation method thereof.
In a first aspect, the present application provides a nontoxic weatherproof watchband, which adopts the following technical scheme:
a nontoxic weather-resistant watchband comprises the following raw materials in parts by weight: 85-100 parts of silicon rubber, 1-4 parts of hydroxyl silicone oil, 2-6 parts of modified titanium dioxide, 5-10 parts of nano titanium dioxide, 0.5-2 parts of vulcanizing agent and 0.2-1 part of plasticizer.
By adopting the technical scheme, the nontoxic weather-resistant watch strap prepared by the method is prepared by adding modified titanium dioxide and nano titanium dioxide into the basic raw materials of silicon rubber, hydroxyl silicone oil, vulcanizing agent and plasticizer, and the prepared watch strap is nontoxic and has good aging resistance; titanium dioxide as a pigment has lattice defects, a plurality of photoactivation points exist on the surface of the titanium dioxide, and the titanium dioxide can generate continuous redox reaction under the irradiation of ultraviolet light for a long time to generate hydroxyl and hydroperoxyl free radicals, which have high activity, can oxidize organic polymers in products to generate macromolecular chain scission and degradation, destroy the continuity of the products, and reduce the weather resistance of the products. The modified titanium dioxide is prepared by modifying titanium dioxide, and the titanium dioxide is subjected to inorganic surface treatment, so that one or more layers of 'films' are coated on the surfaces of titanium dioxide particles, direct irradiation of ultraviolet light on titanium dioxide is prevented, direct contact between titanium dioxide and product organic matters is avoided, the destructive power of photochemical action is reduced, and the weather resistance of the product is improved.
Preferably, the nontoxic weather-proof watchband comprises the following raw materials in parts by weight: 90-95 parts of silicon rubber, 2-3 parts of hydroxyl silicone oil, 3-5 parts of modified titanium dioxide, 6-8 parts of nano titanium dioxide, 1-1.5 parts of vulcanizing agent and 0.4-0.8 part of plasticizer.
By adopting the technical scheme, when the using amount of the raw materials of the nontoxic weather-resistant watchband is optimized, and the using amount of the raw materials of the nontoxic weather-resistant watchband is in the range, the content of lead, cadmium, hexavalent chromium and mercury in the prepared nontoxic weather-resistant watchband meets the national standard requirement, and the content is low.
Preferably, the modified titanium dioxide is prepared by the titanium dioxide through silicide treatment and aluminide treatment respectively and then reacting with zinc aluminide treatment.
Preferably, the preparation method of the modified titanium dioxide comprises the following steps: 1) Firstly, simultaneously adding silicate and a pH regulator which account for 1-2% of the mass fraction of the titanium dioxide base material into the titanium dioxide base material, and homogenizing until the pH value reaches 6.5-7.5 to obtain a first material; 2) Then adding an aluminum compound and a pH regulator which account for 0.5-1% of the mass fraction of the titanium dioxide base material into the first material, and homogenizing to obtain a second material; 3) And then adding a zinc compound, an aluminum compound and a pH regulator which account for 0.5-2% of the mass fraction of the titanium dioxide base material into the first material, and homogenizing until the pH value reaches 8.0-8.5 to obtain the modified titanium dioxide.
By adopting the technical scheme, the uniform and compact laminated silicon dioxide coating is prepared by coating a special silicon film layer on the surface of titanium dioxide particles, namely coating silicon layer by layer; after the multilayer laminated silicon film layer is formed, an amorphous alumina film layer is coated, and then zinc-aluminum composite coating is carried out, so that the titanium dioxide has high weather resistance and dispersibility, and is added into the preparation process of the watch band, thereby effectively improving the weather resistance of the watch band.
Preferably, the nano titanium dioxide is mixed crystal type gas phase nano titanium dioxide.
By adopting the technical scheme, two structures of anatase nano titanium dioxide and rutile nano titanium dioxide in the mixed crystal type gas phase nano titanium dioxide are mixed, so that the TiO is enlarged 2 The defect density in the crystal lattice improves the capture capacity of the gas phase nano titanium dioxide to bacteria, and hasThe weather resistance and the ageing resistance of the gas phase nano titanium dioxide are improved, so that the weather resistance of the watch strap is improved.
Preferably, the vulcanizing agent comprises one or more of a sulfur vulcanizing agent, a silicone rubber bridging agent, a platinum vulcanizing agent, zinc oxide and an organic peroxide.
Through adopting above-mentioned technical scheme, adopt the vulcanizing agent in this application raw materials for the vulcanization intensity of raw materials is higher, thereby makes the watch band quality of making better.
Preferably, the plasticizer is one of DOP, DOS and DOA.
In a second aspect, the application provides a preparation method of a nontoxic weather-resistant watch band, which adopts the following technical scheme:
a preparation method of a nontoxic weather-resistant watchband comprises the following steps:
s1, taking 1/2 of silicon rubber, and mixing for 1-2min at room temperature to obtain a first mixture;
s2, adding hydroxyl silicone oil, modified titanium dioxide powder, nano titanium dioxide and a vulcanizing agent into the first mixture, mixing for 5-6min, and rolling to obtain a second mixture;
s3, taking the rest silicone rubber, mixing for 1-2min, adding the second mixture of S2 and a plasticizer, mixing for 2-3min, and rolling for 3-5 times; adjusting the roller spacing to be small, and rolling for 3-4 times after thinning; adjusting the roll spacing to be large, and discharging and standing to obtain a third mixture;
and S4, vulcanizing and forming the third mixture to obtain the nontoxic weather-resistant watch strap.
By adopting the technical scheme, the silicon rubber, the hydroxyl silicone oil, the modified titanium dioxide, the nano titanium dioxide, the vulcanizing agent and the plasticizer are blended in a certain sequence to prepare the nontoxic weather-resistant watch band, the preparation process is simple and feasible, and the obtained watch band has low heavy metal content and good weather resistance; when the time and the rolling times in the preparation steps are within the range, the performance of the watchband is not obviously influenced.
In summary, the present application has the following beneficial effects:
1. according to the nontoxic weather-resistant watch strap prepared by the application, modified titanium dioxide and nano titanium dioxide are added into the basic raw materials of silicon rubber, hydroxyl silicone oil, a vulcanizing agent and a plasticizer, so that the prepared watch strap is nontoxic and has good aging resistance; the modified titanium dioxide is prepared by modifying titanium dioxide, the titanium dioxide serving as a pigment has some lattice defects, a plurality of light activation points exist on the surface of the titanium dioxide, and the titanium dioxide can generate continuous oxidation-reduction reaction to generate hydroxyl and peroxyhydroxyl free radicals under the irradiation of ultraviolet light for a long time, and the hydroxyl and peroxyhydroxyl free radicals have high activity, can oxidize organic polymers in products, generate high-molecular chain scission and degradation, destroy the continuity of the products, and reduce the weather resistance of the products. This application is through carrying out inorganic surface treatment to titanium white powder, at titanium dioxide particle surface package one deck or multilayer "membrane", prevents ultraviolet ray to the direct irradiation of titanium dioxide, also can avoid titanium dioxide and the direct contact of goods organic matter, reduces its photochemistry's destructive power to improve goods weatherability.
2. According to the nontoxic weather-resistant watchband prepared by the application, through heavy metal content measurement and weather resistance test, the lead, cadmium, hexavalent chromium and mercury contents meet the national standard requirements, and the contents are low, and meanwhile, after ozone aging resistance test, the watch band is free of cracks and has good weather resistance.
Detailed Description
The present application will be described in further detail with reference to examples.
Raw materials
The raw materials used in the application are all common commercial materials.
Preparation examples
Preparation example 1
The preparation method of the modified titanium dioxide of preparation example 1 is as follows:
1) Firstly, adding Na accounting for 1 percent of the mass fraction of the titanium dioxide base material into the titanium dioxide base material at the same time 2 SiO 3 Solution with dilute H 2 SO 4 Cocurrent flow, maintaining the pH of the slurry at 9.5, homogenization for 20min, then passage through H 2 SO 4 Adjusting pH, reducing pH by 1 each time and homogenizing for 20min until pH reaches 6.5 to obtain a first material;
2) Then adding an aluminum sulfate solution and a NaOH solution which account for 0.5 percent of the mass fraction of the titanium dioxide base material into the first material, and homogenizing for 30min to obtain a second material;
3) And then adding a zinc sulfate solution accounting for 1% of the mass fraction of the titanium dioxide base material, a sodium aluminate solution accounting for 0.5% of the mass fraction of the titanium dioxide base material and a pH regulator into the first material, homogenizing for 40min, and regulating the pH to 8.0 to obtain the modified titanium dioxide.
Preparation example 2
The difference between the modified titanium dioxide and the preparation example 1 is that Na accounting for 2 percent of the mass of the titanium dioxide base material is added in the step 1) 2 SiO 3 The solution and the rest of the steps are the same as those in preparation example 1.
Preparation example 3
The modified titanium dioxide is different from the preparation example 2 in that an aluminum sulfate solution accounting for 1% of the mass fraction of the titanium dioxide base material is added in the step 2), and the rest steps are the same as the preparation example 2.
Preparation example 4
The modified titanium dioxide is different from the preparation example 3 in that zinc sulfate solution accounting for 1% of the mass fraction of the titanium dioxide base material is added in the step 3), and the rest steps are the same as the preparation example 3.
Preparation example 5
The modified titanium dioxide is different from the preparation example 3 in that zinc sulfate solution accounting for 2% of the mass of the titanium dioxide base material is added in the step 3), and the rest steps are the same as the preparation example 3.
Examples
Examples 1 to 4
The nontoxic weatherproof watch band of examples 1 to 4 was prepared as follows, using the following raw materials in the amounts shown in the following table:
s1, mixing 1/2 of silicon rubber for 2min to obtain a first mixture;
s2, adding hydroxyl silicone oil, modified titanium dioxide powder, nano titanium dioxide and a vulcanizing agent into the first mixture, mixing for 6min, and rolling to obtain a second mixture;
s3, taking the residual silicone rubber, mixing for 2min at room temperature, adding the second mixture of the S2 and a plasticizer, mixing for 2min, and rolling for 5 times; adjusting the roller spacing to be small, and rolling for 3 times after thinning; adjusting the roll spacing to be large, and discharging and standing to obtain a third mixture;
and S4, vulcanizing and forming the third mixture to obtain the nontoxic weather-resistant watch strap.
Wherein the modified titanium dioxide is prepared from preparation example 1, the nano titanium dioxide is mixed crystal type gas phase nano titanium dioxide, the vulcanizing agent is a sulfur vulcanizing agent, and the plasticizer is DOP.
TABLE 1 materials and amounts (kg) of materials of examples 1-4
| Example 1 | Example 2 | Example 3 | Example 4 | |
| Silicone rubber | 85 | 90 | 95 | 100 |
| Hydroxyl silicone oil | 4 | 3 | 2 | 1 |
| Modified titanium white powder | 2 | 2 | 2 | 2 |
| Nano titanium dioxide | 5 | 6 | 8 | 10 |
| Vulcanizing agent | 2 | 1.5 | 1 | 0.5 |
| Plasticizer | 0.2 | 0.4 | 0.8 | 1 |
Example 5
A nontoxic weather-resistant watchband is different from that in example 3 in that modified titanium dioxide is obtained from preparation example 2, and the rest steps are the same as those in example 3.
Example 6
The nontoxic weather-resistant watchband is different from the watchband in example 5 in that the modified titanium dioxide is obtained from preparation example 3, and the rest steps are the same as those in example 5.
Example 7
A nontoxic weather-resistant watchband is different from that in example 6 in that modified titanium dioxide is obtained from preparation example 4, and the rest steps are the same as those in example 6.
Example 8
A nontoxic weather-resistant watchband is different from that in example 6 in that modified titanium dioxide is obtained from preparation example 5, and the rest steps are the same as those in example 6.
Example 9
A nontoxic weather-resistant watchband is different from that in the example 8 in that the addition amount of the modified titanium dioxide is 3kg, and the rest steps are the same as those in the example 8.
Example 10
The difference between the nontoxic weather-resistant watchband and the watch band in example 8 is that the addition amount of the modified titanium dioxide is 5kg, and the other steps are the same as those in example 8.
Example 11
The difference between the nontoxic weather-resistant watchband and the watch band in example 8 is that the addition amount of the modified titanium dioxide is 6kg, and the other steps are the same as those in example 8.
Comparative example
Comparative example 1
A nontoxic weather-resistant watchband is different from the watchband in example 1 in that the addition amount of the modified titanium dioxide is 0.5kg, and the rest steps are the same as those in example 1.
Comparative example 2
The difference between the nontoxic weather-resistant watchband and the watch band in example 1 is that the addition amount of the modified titanium dioxide is 8kg, and the other steps are the same as those in example 1.
Comparative example 3
A nontoxic weather-resistant watchband is different from the watchband in the embodiment 1 in that the same amount of titanium dioxide is used for replacing modified titanium dioxide and is added into raw materials, and the rest steps are the same as the steps in the embodiment 1.
Performance test
Detection method/test method
Nontoxic weather-resistant watch bands were prepared according to the preparation methods of examples 1 to 11 and comparative examples 1 to 3, and then examined according to the following examination methods, the examination results of which are shown in Table 2.
And (3) heavy metal content determination: the nontoxic weather-resistant watch bands of examples 1 to 11 and comparative examples 1 to 3 were subjected to heavy metal content measurement according to the detection method and standard in GB/T38295-2019 limit of lead, cadmium, hexavalent chromium and mercury in plastic materials.
Ozone aging resistance test: according to GB/T7762-2003 static tensile test for ozone crack resistance of vulcanized rubber or thermoplastic rubber, the rubber is exposed to air with certain ozone concentration under certain static tensile strain condition in an ozone aging phase box, and the rubber is subjected to ozone crack resistance test in an environment without direct influence of light at a specified temperature (40 ℃).
TABLE 2 examination results of examples 1 to 11 and comparative examples 1 to 3
As can be seen from the data in Table 2, the nontoxic weather-resistant watch strap is prepared by adding modified titanium dioxide and nano titanium dioxide into the basic raw materials of silicon rubber, hydroxyl silicone oil, a vulcanizing agent and a plasticizer, and the nontoxic weather-resistant watch strap prepared by the method is nontoxic and has better weather resistance.
According to the detection data of the embodiments 1 to 4, the proportion of the raw materials in the embodiment 3 is excellent, and the nontoxic weather-resistant watchband prepared by adopting the proportion in the embodiment 3 has the advantages that the contents of lead, cadmium, hexavalent chromium and mercury meet the national standard requirements, the contents are low, and meanwhile, the nontoxic weather-resistant watchband has no crack after an ozone aging resistance test and has good weather resistance.
As can be seen by combining the detection data of the embodiment 3 and the embodiment 5, when the modified titanium dioxide is prepared, na accounting for 2 percent of the mass fraction of the titanium dioxide base material is added in the step 1) 2 SiO 3 And adding the modified titanium dioxide into the raw materials of the watch band to obtain the nontoxic watch band with good weather resistance. By combining the detection data of the example 6, it can be seen that, when the modified titanium dioxide is prepared, the aluminum sulfate solution accounting for 1% of the mass fraction of the titanium dioxide base material in the step 2) is added into the raw material of the watch band, and the prepared watch band has the contents of lead, cadmium, hexavalent chromium and mercury which meet the national standard requirements, and is lower in content, and meanwhile, has no crack after the ozone aging resistance test, which indicates that the watch band is also better in weather resistance.
By combining the detection data of the embodiments 7 to 8, it can be seen that when the modified titanium dioxide is prepared, the higher the mass fraction of the zinc sulfate solution added in the step 3), the obtained modified titanium dioxide is added into the raw material of the watch band, and the prepared watch band has lower contents of lead, cadmium, hexavalent chromium and mercury and better weather resistance.
By combining the detection data of the embodiment 8, the embodiments 9 to 11 and the comparative examples 1 to 2, it can be seen that when the addition amount of the modified titanium dioxide is 3kg, the contents of lead, cadmium, hexavalent chromium and mercury of the prepared nontoxic weather-resistant watchband meet the national standard requirements, and the content is low, and meanwhile, the nontoxic weather-resistant watchband has no crack after ozone aging resistance test, which indicates that the weather resistance is also good.
According to the detection data of the embodiment 1 and the comparative example 3, when the same amount of titanium dioxide is used to replace the modified titanium dioxide and added into the raw materials, the heavy metal content and the weather resistance of the prepared nontoxic weather-resistant watchband are not better than those of the prepared nontoxic weather-resistant watchband added with the modified titanium dioxide, which indicates that the modified titanium dioxide can reduce the heavy metal content of the watchband material and improve the weather resistance of the watchband material.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A nontoxic weather-resistant watchband is characterized by comprising the following raw materials in parts by weight: 85-100 parts of silicon rubber, 1-4 parts of hydroxyl silicone oil, 2-6 parts of modified titanium dioxide, 5-10 parts of nano titanium dioxide, 0.5-2 parts of vulcanizing agent and 0.2-1 part of plasticizer.
2. The non-toxic, weatherable watch band according to claim 1, wherein: the nontoxic weather-resistant watchband comprises the following raw materials in parts by weight: 90-95 parts of silicon rubber, 2-3 parts of hydroxyl silicone oil, 3-5 parts of modified titanium dioxide, 6-8 parts of nano titanium dioxide, 1-1.5 parts of vulcanizing agent and 0.4-0.8 part of plasticizer.
3. The non-toxic weatherable watchband according to claim 1, wherein: the modified titanium dioxide is prepared by the reaction of titanium dioxide and zinc aluminide after silicide treatment and aluminide treatment respectively.
4. The non-toxic weatherable watchband according to claim 3, wherein: the preparation method of the modified titanium dioxide comprises the following steps: 1) Firstly, simultaneously adding silicate and a pH regulator which account for 1-2% of the mass fraction of the titanium dioxide base material into the titanium dioxide base material, and homogenizing until the pH value reaches 6.5-7.5 to obtain a first material; 2) Then adding an aluminum compound and a pH regulator which account for 0.5-1% of the mass fraction of the titanium dioxide base material into the first material, and homogenizing to obtain a second material; 3) And then adding a zinc compound, an aluminum compound and a pH regulator which account for 0.5-2% of the mass fraction of the titanium dioxide base material into the first material, and homogenizing until the pH value reaches 8.0-8.5 to obtain the modified titanium dioxide.
5. The non-toxic weatherable watchband according to claim 1, wherein: the nano titanium dioxide is mixed crystal type gas phase nano titanium dioxide.
6. The non-toxic, weatherable watch band according to claim 1, wherein: the vulcanizing agent comprises one or more of a sulfur vulcanizing agent, a silicon rubber bridge frame agent, a platinum vulcanizing agent, zinc oxide and organic peroxide.
7. The non-toxic, weatherable watch band according to claim 1, wherein: the plasticizer is one of DOP, DOS and DOA.
8. A method for the preparation of a non-toxic weatherable watch band as claimed in any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1, taking 1/2 of silicon rubber, and mixing for 1-2min to obtain a first mixture;
s2, adding hydroxyl silicone oil, modified titanium dioxide powder, nano titanium dioxide and a vulcanizing agent into the first mixture, mixing for 5-6min, and rolling to obtain a second mixture;
s3, taking the residual silicone rubber, mixing for 1-2min, adding the second mixture of the S2 and a plasticizer, mixing for 2-3min, and rolling for 3-5 times; adjusting the roller spacing to be small, and rolling for 3-4 times after being thinned; adjusting the roll spacing to be large, and discharging and standing to obtain a third mixture;
and S4, vulcanizing and forming the third mixture to obtain the nontoxic weather-resistant watch strap.
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| CN106433135A (en) * | 2016-09-08 | 2017-02-22 | 黄品超 | Curable rubber composition and curable rubber |
| CN107936569A (en) * | 2017-12-25 | 2018-04-20 | 安徽微威环保科技有限公司 | A kind of fire resistant silicon rubber and its processing method |
| CN113088105A (en) * | 2021-03-22 | 2021-07-09 | 龙蟒佰利联集团股份有限公司 | High-weather-resistance titanium dioxide and preparation method thereof |
-
2022
- 2022-09-15 CN CN202211119597.2A patent/CN115491035A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616872A (en) * | 1992-07-03 | 1994-01-25 | Nippon Zeon Co Ltd | Rubber composition |
| CN102876047A (en) * | 2012-09-20 | 2013-01-16 | 吴江市天源塑胶有限公司 | Tearing-resistant silicone rubber composition |
| CN106433135A (en) * | 2016-09-08 | 2017-02-22 | 黄品超 | Curable rubber composition and curable rubber |
| CN107936569A (en) * | 2017-12-25 | 2018-04-20 | 安徽微威环保科技有限公司 | A kind of fire resistant silicon rubber and its processing method |
| CN113088105A (en) * | 2021-03-22 | 2021-07-09 | 龙蟒佰利联集团股份有限公司 | High-weather-resistance titanium dioxide and preparation method thereof |
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