CN110819015A - Preparation method of tire vulcanization capsule containing modified gutta-percha - Google Patents
Preparation method of tire vulcanization capsule containing modified gutta-percha Download PDFInfo
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- CN110819015A CN110819015A CN201911157031.7A CN201911157031A CN110819015A CN 110819015 A CN110819015 A CN 110819015A CN 201911157031 A CN201911157031 A CN 201911157031A CN 110819015 A CN110819015 A CN 110819015A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K2003/2231—Oxides; Hydroxides of metals of tin
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a preparation method of a tire vulcanization capsule containing modified gutta-percha, which comprises the following steps: s1, preparing modified chlorinated butyl rubber; s2, preparing modified natural rubber; s3, taking 5-10 parts by weight of the modified butyl rubber in the step S1, the modified natural rubber in the step S2 and the modified eucommia ulmoides rubber, 30 parts by weight of N220 carbon black, 40 parts by weight of N550 carbon black, 1 part by weight of magnesium oxide, 2.5 parts by weight of zinc oxide, 2 parts by weight of stearic acid, 1.5 parts by weight of castor oil, 1 part by weight of an anti-aging agent and 2 parts by weight of stannous chloride, putting the materials into an open mill for mixing at the mixing temperature of 90-95 ℃ for 20-30 min, and tabletting after mixing is finished to obtain a mixed rubber sheet; and S4, injection vulcanization to obtain the tire vulcanization capsule. The invention adopts the modified gutta-percha to replace partial natural rubber, reduces the consumption of the natural rubber, and simultaneously ensures that the tire vulcanization capsule has good mechanical property and aging resistance.
Description
Technical Field
The invention relates to the technical field of tire curing capsules, in particular to a preparation method of a tire curing capsule containing modified gutta-percha.
Background
The tyre vulcanizing capsule is a hollow thin-wall rubber product of a tyre vulcanizer and is used for filling an inner cavity of a tyre blank to be vulcanized and then introducing a heating medium to carry out shaping and vulcanizing operation by matching with the vulcanizer. Tire curing bladders are subjected to harsh operating conditions including high temperatures, substantial flexing, co-vulcanization, and migration of the curing agents from the uncured green tire. The service life of the vulcanizing bladder has great influence on the production efficiency of a tire factory, and the tire vulcanizing bladder mainly has the functions of inflating compressed air, nitrogen or hot water and the like in the tire vulcanizing process to stretch and support a tire rubber blank to form an internal pressure vulcanized tire.
At present, the main material for preparing the tire curing bladder is natural rubber, but the tire curing bladder prepared from the natural rubber has poor aging resistance and short service life.
Meanwhile, natural rubber in China mainly depends on import, and the situation of high dependence on import and continuous rise of rubber price seriously influences and restricts the safety development of rubber industry in China for a long time, develops new rubber resources and solves the problem of lack of natural rubber resources in China. However, eucommia is a unique plant in China, and more than 95% of eucommia resources are in China all around the world. Meanwhile, eucommia ulmoides is also a high-quality glue source tree species which has the widest application range and the greatest development potential in the world. The fruits, leaves, bark and roots of eucommia bark all contain abundant gutta-percha. The gutta-percha with excellent performance can be used as a rubber high-elasticity material, a low-temperature plastic material and a thermoelastic material, is widely applied to various fields of national economy such as rubber industry, aerospace, national defense, ships, chemical engineering, medical treatment, sports and the like, and has extremely wide industrial coverage.
Gutta-percha is a natural polymer material produced from eucommia trees, is an isomer with hevea rubber (natural gum), has a trans-polyisoprene structure, is more regular and is easy to crystallize, so that the insulation property is excellent. The rubber composition modified by the gutta percha has the advantages of wear resistance, tear resistance, corrosion resistance, wet skid resistance, small rolling resistance, energy conservation and the like, can partially replace natural rubber, is a good material for high-quality tires, and is an integrated material for the tires with excellent comprehensive performance prepared by blending the gutta percha and synthetic rubbers such as polybutadiene rubber and the like due to excellent wear resistance and tear resistance. However, gutta-percha is easy to crystallize, so that the gutta-percha is in a hard plastic state at room temperature and is not beneficial to processing and use.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of a tire curing bladder containing modified gutta-percha, which comprises the following steps:
s1, preparation of modified chlorinated butyl rubber: taking 55 parts by weight of butyl rubber, 5 parts by weight of chlorine-containing activated carbon, 1 part by weight of nano titanium oxide, 5 parts by weight of chloroethylene and 0.5 part by weight of nano tin oxide, and banburying the mixture in a banbury mixer at the banburying temperature of 140-150 ℃ for 20-30 min to obtain modified chlorinated butyl rubber;
s2, preparation of modified natural rubber: according to the weight parts, 30 parts of natural rubber, 10 parts of butadiene rubber, 1 part of silicon rubber, 1 part of chloroprene rubber, 2 parts of sulfur, 1 part of cross-linking agent, 1 part of organic montmorillonite and 0.5 part of nano-alumina are put into an internal mixer for internal mixing at the temperature of 85-105 ℃ for 20-30 min to obtain modified natural rubber;
s3, taking 5-10 parts by weight of the modified butyl rubber in the step S1, the modified natural rubber in the step S2 and the modified eucommia ulmoides rubber, 30 parts by weight of N220 carbon black, 40 parts by weight of N550 carbon black, 1 part by weight of magnesium oxide, 2.5 parts by weight of zinc oxide, 2 parts by weight of stearic acid, 1.5 parts by weight of castor oil, 1 part by weight of an anti-aging agent and 2 parts by weight of stannous chloride, putting the materials into an open mill for mixing at the mixing temperature of 90-95 ℃ for 20-30 min, and tabletting after mixing is finished to obtain a mixed rubber sheet;
s4, injection vulcanization process: placing the film obtained in the step S3 into an injection vulcanizing machine, controlling the temperature of a screw at 75-85 ℃ and controlling the pressure at 10-20 MPa; the injection vulcanization temperature is 175-205 ℃, and the vulcanization time is 20-45 min; and after vulcanization, the injection vulcanizing machine ejects the tire bladder out of the mold cavity, and the tire vulcanizing bladder is prepared.
Preferably, the chlorine content of the chlorine-containing activated carbon in the step S1 is 2.0-3.5 mg/mol.
Preferably, in step S3, the antioxidant is 4010 NA.
Preferably, the modified gutta percha in step S3 is an epoxidized gutta percha elastomer, and the epoxy degree of the epoxidized gutta percha elastomer is 20%.
Preferably, the modified gutta-percha in step S3 is hydrogenated gutta-percha, and the hydrogenation degree of the hydrogenated gutta-percha is 20%.
Compared with the prior art, the invention has the following advantages:
1. the butyl rubber is modified, so that the mechanical properties such as hardness, strength and the like of the tire curing bladder are improved;
2. the natural rubber is modified, so that the aging resistance of the tire curing bladder is improved;
3. and a proper amount of modified eucommia ulmoides gum is added, so that the use amount of natural rubber is reduced, and the mechanical property and the aging resistance of the tire curing bladder are further improved.
Detailed Description
Example 1:
a preparation method of a tire curing bladder containing modified gutta-percha comprises the following steps:
s1, preparation of modified chlorinated butyl rubber: taking 55 parts by weight of butyl rubber, 5 parts by weight of chlorine-containing activated carbon (the chlorine content is 2.0-3.5 mg. mol/g), 1 part by weight of nano titanium oxide, 5 parts by weight of vinyl chloride and 0.5 part by weight of nano tin oxide, and banburying the mixture in a banbury mixer at the banburying temperature of 140-150 ℃ for 20-30 min to obtain modified chlorinated butyl rubber;
s2, preparation of modified natural rubber: according to the weight parts, 30 parts of natural rubber, 10 parts of butadiene rubber, 1 part of silicon rubber, 1 part of chloroprene rubber, 2 parts of sulfur, 1 part of cross-linking agent, 1 part of organic montmorillonite and 0.5 part of nano-alumina are put into an internal mixer for internal mixing at the temperature of 85-105 ℃ for 20-30 min to obtain modified natural rubber;
s3, taking 5 parts by weight of the modified butyl chloride rubber in the step S1, 5 parts by weight of the modified natural rubber in the step S2 and an epoxidized eucommia ulmoides rubber elastomer (the epoxy degree is 20%), 30 parts by weight of N220 carbon black, 40 parts by weight of N550 carbon black, 1 part by weight of magnesium oxide, 2.5 parts by weight of zinc oxide, 2 parts by weight of stearic acid, 1.5 parts by weight of castor oil, 4010NA1 parts by weight of an anti-aging agent and 2 parts by weight of stannous chloride, putting the mixture into an open mill for mixing at the mixing temperature of 90-95 ℃ for 20-30 min, and tabletting after mixing is finished to obtain a mixed rubber sheet;
s4, injection vulcanization process: placing the film obtained in the step S3 into an injection vulcanizing machine, controlling the temperature of a screw at 75-85 ℃ and controlling the pressure at 10-20 MPa; the injection vulcanization temperature is 175-205 ℃, and the vulcanization time is 20-45 min; and after vulcanization, the injection vulcanizing machine ejects the tire bladder out of the mold cavity, and the tire vulcanizing bladder is prepared.
Example 2:
the amount of the epoxidized gutta percha elastomer (degree of epoxy: 20%) used in example 1 was changed to 10 parts, and the remaining formulation and process conditions were the same as those in example 1.
Example 3:
the epoxidized gutta percha elastomer (degree of epoxy: 20%) in example 1 was replaced with hydrogenated gutta percha (degree of hydrogenation: 20%) in an amount of 5 parts, and the remaining formulation and process conditions were the same as those in example 1.
Example 4:
the hydrogenated gutta-percha (degree of hydrogenation: 20%) in example 4 was changed to 10 parts, and the remaining formulation and process conditions were the same as those in example 4.
And (3) performance testing:
the tire curing bladder obtained in the above examples 1 to 4 was subjected to a mechanical property test with the tire curing bladders of comparative example 1 and comparative example 2, the comparative example 1 being the tire curing bladder obtained by removing the modified gutta percha from the formulations of examples 1 to 4; comparative example 2 is a conventional curing bladder sample.
TABLE 1 mechanical Property test data for tire curing bladders of examples and comparative examples
As can be seen from the above table, the butyl rubber and the natural rubber are simultaneously modified, and the obtained tire curing bladder has various performances superior to those of the conventional tire curing bladder; the hardness, tensile strength, elongation at break and 300% stress at definite elongation of the tire curing bladder can be further improved by adding the modified gutta percha during mixing, but the elongation at break is slightly reduced along with the increase of the using amount of the modified gutta percha.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (5)
1. A preparation method of a tire curing bladder containing modified gutta-percha is characterized by comprising the following steps:
s1, preparation of modified chlorinated butyl rubber: taking 55 parts by weight of butyl rubber, 5 parts by weight of chlorine-containing activated carbon, 1 part by weight of nano titanium oxide, 5 parts by weight of chloroethylene and 0.5 part by weight of nano tin oxide, and banburying the mixture in a banbury mixer at the banburying temperature of 140-150 ℃ for 20-30 min to obtain modified chlorinated butyl rubber;
s2, preparation of modified natural rubber: according to the weight parts, 30 parts of natural rubber, 10 parts of butadiene rubber, 1 part of silicon rubber, 1 part of chloroprene rubber, 2 parts of sulfur, 1 part of cross-linking agent, 1 part of organic montmorillonite and 0.5 part of nano-alumina are put into an internal mixer for internal mixing at the temperature of 85-105 ℃ for 20-30 min to obtain modified natural rubber;
s3, taking 5-10 parts by weight of the modified butyl rubber in the step S1, the modified natural rubber in the step S2 and the modified eucommia ulmoides rubber, 30 parts by weight of N220 carbon black, 40 parts by weight of N550 carbon black, 1 part by weight of magnesium oxide, 2.5 parts by weight of zinc oxide, 2 parts by weight of stearic acid, 1.5 parts by weight of castor oil, 1 part by weight of an anti-aging agent and 2 parts by weight of stannous chloride, putting the materials into an open mill for mixing at the mixing temperature of 90-95 ℃ for 20-30 min, and tabletting after mixing is finished to obtain a mixed rubber sheet;
s4, injection vulcanization process: placing the film obtained in the step S3 into an injection vulcanizing machine, controlling the temperature of a screw at 75-85 ℃ and controlling the pressure at 10-20 MPa; the injection vulcanization temperature is 175-205 ℃, and the vulcanization time is 20-45 min; and after vulcanization, the injection vulcanizing machine ejects the tire bladder out of the mold cavity, and the tire vulcanizing bladder is prepared.
2. The method for preparing the tire curing bladder containing the modified gutta-percha as the claim 1, wherein the method comprises the following steps: in the step S1, the chlorine content of the chlorine-containing activated carbon is 2.0-3.5 mg/mol.
3. The method for preparing the tire curing bladder containing the modified gutta-percha as the claim 1, wherein the method comprises the following steps: in step S3, the antioxidant is 4010 NA.
4. The method for preparing the tire curing bladder containing the modified gutta-percha as the claim 1, wherein the method comprises the following steps: in the step S3, the modified gutta percha is an epoxidized gutta percha elastomer, and the epoxy degree of the epoxidized gutta percha elastomer is 20%.
5. The method for preparing the tire curing bladder containing the modified gutta-percha as the claim 1, wherein the method comprises the following steps: in the step S3, the modified gutta-percha is hydrogenated gutta-percha, and the hydrogenation degree of the hydrogenated gutta-percha is 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911157031.7A CN110819015A (en) | 2019-11-22 | 2019-11-22 | Preparation method of tire vulcanization capsule containing modified gutta-percha |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911157031.7A CN110819015A (en) | 2019-11-22 | 2019-11-22 | Preparation method of tire vulcanization capsule containing modified gutta-percha |
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| CN110819015A true CN110819015A (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548540A (en) * | 2020-06-05 | 2020-08-18 | 正新橡胶（中国）有限公司 | Rubber composition for tire forming capsule and forming capsule |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105647038A (en) * | 2016-03-09 | 2016-06-08 | 孟红琳 | Method for preparing high-strength tire vulcanizing capsules |
| CN105670145A (en) * | 2016-03-09 | 2016-06-15 | 孟红琳 | Preparation method of ageing-resistant tire curing bladder |
| CN106496657A (en) * | 2016-09-27 | 2017-03-15 | 沈阳化工大学 | A kind of gutta-percha aviation sidewall rubber and preparation method thereof |
-
2019
- 2019-11-22 CN CN201911157031.7A patent/CN110819015A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105647038A (en) * | 2016-03-09 | 2016-06-08 | 孟红琳 | Method for preparing high-strength tire vulcanizing capsules |
| CN105670145A (en) * | 2016-03-09 | 2016-06-15 | 孟红琳 | Preparation method of ageing-resistant tire curing bladder |
| CN106496657A (en) * | 2016-09-27 | 2017-03-15 | 沈阳化工大学 | A kind of gutta-percha aviation sidewall rubber and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548540A (en) * | 2020-06-05 | 2020-08-18 | 正新橡胶（中国）有限公司 | Rubber composition for tire forming capsule and forming capsule |
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Application publication date: 20200221 |