CN114773694B - Preparation method of TSR9710 modified rubber - Google Patents
Preparation method of TSR9710 modified rubber Download PDFInfo
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- CN114773694B CN114773694B CN202210423152.7A CN202210423152A CN114773694B CN 114773694 B CN114773694 B CN 114773694B CN 202210423152 A CN202210423152 A CN 202210423152A CN 114773694 B CN114773694 B CN 114773694B
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Abstract
The invention discloses a preparation method of TSR9710 modified rubber, which comprises the following steps: the fresh liquid rubber is produced into full emulsion according to the process, and then the full emulsion, SCR10 finished rubber and natural solidification and airing rubber are mixed according to the following steps of 1: mixing and dry stirring the materials in a ratio of 2:2 to prepare the TSR9710 modified rubber. The TSR9710 modified rubber prepared by the method has good tensile resistance effect and high elongation, and fresh liquid rubber is cured, crepe, hammer-milled and granulated and dried to obtain full latex, so that the adsorption force among rubber molecular chains is reduced, and the dispersion of the rubber in SCR10 rubber is facilitated; the uniform dispersion and stable distribution of the SCR10 rubber in the whole latex and the natural solidification and airing rubber are promoted, the two-phase interface is eliminated, and the TSR9710 modified rubber with stable combination of two phases is formed through secondary crepe, secondary dry stirring and mixing, crushing and drying, so that the rubber has good tensile resistance, extensibility and water impermeability.
Description
Technical Field
The invention relates to the technical field of rubber processing, in particular to a preparation method of TSR9710 modified rubber.
Background
The TSR series is a short for technical standard glue and can be divided into a number of categories: TSR5, TSR20, TSR WF, etc. TSR9710 modified rubber is also called radial tire rubber, and is a high-quality product of civil engineering rubber, and the color of the rubber is dark brown. The finished product is processed by taking high-quality carefully-selected raw films, rubber clusters, cup rubber and films as raw materials, wherein the Mooney viscosity value is controlled to be 73-93, and the impurity content of TSR9710 is controlled to be below 0.08%; TSR9720 impurity is slightly higher and is below 0.16%; the product has very good strength performance, good banburying and extrusion performance and is suitable for the joint part of the inner tube. To improve the transportation efficiency, TSR9710 is widely accepted by the tire manufacturing industry, and has a large market demand, so that it has become a main product of civil rubber. Besides tires, TSR9710 modified rubbers are also used for all rubber products, seals, automotive gadgets, vibration mats, bridge mats, protective mats, etc. that require strength and wear characteristics. The tensile resistance effect, the elongation and the water impermeability of the TSR9710 modified rubber of the prior art cannot meet the requirements of social development.
Disclosure of Invention
The invention aims to provide a preparation method of TSR9710 modified rubber, which aims to solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a preparation method of TSR9710 modified rubber comprises the following steps:
s10: adding fresh liquid rubber, preservative and accelerator into an internal mixer, mixing the mixture until the acid concentration is 22-25%, and placing the mixture into a solidification tank for 10 hours for curing;
s20: the cured liquid crepe and the tear grains are put into an oven at 110-180 ℃ to be dried for 4 hours, thus obtaining full emulsion;
s30: mixing the prepared full emulsion with SCR No. 10 rubber, naturally solidifying and airing rubber according to the proportion of 1-2:2-3:2-4, and stirring and mixing at the temperature of 80 ℃;
s40: carrying out primary crepe, dry stirring and mixing at 20 ℃, then carrying out secondary crepe, crushing, and drying at 80 ℃ for 3-4 hours;
s50: cooling to 30-40 deg.c to obtain TSR9710 modified rubber.
Preferably, the fresh liquid rubber in step S10 includes at least one of: isoprene rubber, nitrile rubber, butadiene rubber and styrene butadiene rubber.
Preferably, the preservative in step S10 is N-phenyl-N ' -isopropyl-p-phenylenediamine, N-cyclohexyl-N ' -phenyl-p-phenylenediamine or N-isopropyl-N ' -phenyl-p-phenylenediamine.
Preferably, the accelerator in step S10 comprises one or more of the following materials: n-tert-butyl-2-benzothiazole sulfenamide, ethylene thiourea.
Preferably, the naturally coagulated and air-dried rubber in step S30 is a coagulated rubber cooled to room temperature by fresh liquid rubber.
Preferably, the ratio of the whole latex to the SCR No. 10 rubber and the naturally solidified and dried rubber in the step S30 is 1:2:2.
Preferably, the ratio of the whole latex to the SCR No. 10 rubber in the step S30 is 2:3:4.
Preferably, the ratio of the whole latex to the SCR No. 10 rubber in the step S30 is 1:3:3.
Compared with the prior art, the invention has the beneficial effects that: the TSR9710 modified rubber prepared by the preparation method of the TSR9710 modified rubber has good tensile resistance effect, high elongation and strong water impermeability, and fresh liquid rubber is firstly banburying, curing, creping, tearing and drying to obtain full latex, so that the adsorption force among rubber molecular chains is reduced, and the dispersion of the TSR9710 modified rubber in SCR10 rubber is facilitated; and then blending the whole latex, the SCR10 rubber and the naturally solidified and dried rubber, and carrying out dry mixing, so as to further promote the uniform dispersion and stable distribution of the SCR10 rubber in the whole latex and the naturally solidified and dried rubber, eliminate two-phase interfaces, and form the TSR9710 modified rubber with stable combination of two phases through secondary crepe, secondary dry mixing, crushing and drying, thereby having good tensile resistance, elongation performance and water impermeability, and also having good processability, low-temperature performance and weather resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only one embodiment of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A preparation method of TSR9710 modified rubber comprises the following steps:
s10: adding fresh liquid rubber, preservative and accelerator into an internal mixer, mixing the acid concentration to 24%, and placing the mixture into a solidification tank for 10 hours for curing;
s20: the cured liquid crepe and the cured tear grains are put into an oven at 150 ℃ to be dried for 4 hours, so as to obtain full emulsion;
s30: mixing the prepared full latex with SCR No. 10 rubber and naturally coagulated and dried rubber according to the proportion of 1:2:2, and stirring and mixing at 80 ℃;
s40: carrying out primary crepe, dry stirring and mixing at 20 ℃, then carrying out secondary crepe, crushing, and drying at 80 ℃ for 3 hours;
s50: cooling to 35 deg.c to obtain TSR9710 modified rubber.
In this embodiment, the fresh liquid rubber in step S10 includes isoprene rubber and styrene-butadiene rubber.
Specifically, the preservative in the step S10 adopts N-phenyl-N' -isopropyl p-phenylenediamine, and the accelerator in the step S10 comprises N-tertiary butyl-2-benzothiazole sulfenamide and N-tertiary butyl-2-benzothiazole sulfenamide.
It is to be noted that the naturally coagulated and air-dried rubber in step S30 is a coagulated rubber cooled to room temperature by fresh liquid rubber.
The TSR9710 modified rubber prepared in the embodiment has good tensile resistance effect, high elongation and strong water impermeability, and fresh liquid rubber is firstly banburying, curing, creping, tearing and drying to obtain full latex, so that the adsorption force among rubber molecular chains is reduced, and the dispersion of the rubber in SCR10 rubber is facilitated; and then blending the whole latex, the SCR10 rubber and the naturally solidified and dried rubber, and carrying out dry mixing, so as to further promote the uniform dispersion and stable distribution of the SCR10 rubber in the whole latex and the naturally solidified and dried rubber, eliminate the two-phase interface, and form the TSR9710 modified rubber resistance with stable combination of two phases through secondary crepe, secondary dry mixing, crushing and drying.
Example 2
A preparation method of TSR9710 modified rubber comprises the following steps:
s10: adding fresh liquid rubber, preservative and accelerator into an internal mixer, mixing the acid concentration to 22%, and placing the mixture into a solidification tank for 10 hours for curing;
s20: the cured liquid crepe and the cured tear grains are put into an oven at 110 ℃ to be dried for 4 hours, so as to obtain full emulsion;
s30: mixing the prepared full latex with SCR No. 10 rubber and naturally coagulated and dried rubber according to the proportion of 2:3:4, and stirring and mixing at 80 ℃;
s40: carrying out primary crepe, dry stirring and mixing at 20 ℃, then carrying out secondary crepe, crushing, and drying at 80 ℃ for 3 hours;
s50: cooling to 30 deg.c to obtain TSR9710 modified rubber.
In this embodiment, styrene-butadiene rubber is used as the fresh liquid rubber in step S10.
Specifically, the preservative in the step S10 adopts N-cyclohexyl-N' -phenyl p-phenylenediamine, and the accelerator in the step S10 comprises N-tertiary butyl-2-benzothiazole sulfenamide and ethylene thiourea.
It is to be noted that the naturally coagulated and air-dried rubber in step S30 is a coagulated rubber cooled to room temperature by fresh liquid rubber.
The TSR9710 modified rubber prepared in the embodiment has good tensile resistance effect, high elongation and strong water impermeability, and fresh liquid rubber is firstly banburying, curing, creping, tearing and drying to obtain full latex, so that the adsorption force among rubber molecular chains is reduced, and the dispersion of the rubber in SCR10 rubber is facilitated; and then blending the whole latex, the SCR10 rubber and the naturally solidified and dried rubber, and carrying out dry mixing, so as to further promote the uniform dispersion and stable distribution of the SCR10 rubber in the whole latex and the naturally solidified and dried rubber, eliminate the two-phase interface, and form the TSR9710 modified rubber resistance with stable combination of two phases through secondary crepe, secondary dry mixing, crushing and drying.
Example 3
A preparation method of TSR9710 modified rubber comprises the following steps:
s10: adding fresh liquid rubber, preservative and accelerator into an internal mixer, mixing the acid concentration to 25%, and placing the mixture into a solidification tank for 10 hours for curing;
s20: the cured liquid crepe and the cured tear grains are put into an oven at 180 ℃ to be dried for 4 hours, so as to obtain full emulsion;
s30: mixing the prepared full latex with SCR No. 10 rubber and naturally coagulated and dried rubber according to the proportion of 1:3:3, and stirring and mixing at 80 ℃;
s40: carrying out primary crepe, dry stirring and mixing at 20 ℃, then carrying out secondary crepe, crushing, and drying at 80 ℃ for 4 hours;
s50: cooling to 40 deg.c to obtain TSR9710 modified rubber.
In this embodiment, the fresh liquid rubber in step S10 includes isoprene rubber, nitrile rubber, butadiene rubber and styrene butadiene rubber.
Specifically, the preservative in the step S10 adopts N-phenyl-N' -isopropyl p-phenylenediamine, and the accelerator in the step S10 comprises a mixture of N-tertiary butyl-2-benzothiazole sulfenamide, N-tertiary butyl-2-benzothiazole sulfenamide and ethylene thiourea.
It is to be noted that the naturally coagulated and air-dried rubber in step S30 is a coagulated rubber cooled to room temperature by fresh liquid rubber.
The following table shows the detection index of each example:
| detecting items | Rubber tensile strength (N/5 cm) | Elongation (%) | Waterproof property (KN) |
| Example 1 | 316 | 135 | 0.53 |
| Example 2 | 320 | 134 | 0.62 |
| Example 3 | 326 | 142 | 0.58 |
The TSR9710 modified rubber prepared by the preparation method of the TSR9710 modified rubber has good tensile resistance effect, high elongation and strong water impermeability, and the fresh liquid rubber is firstly banburying, curing, creping, tearing and drying to obtain the full latex, so that the adsorption force among rubber molecular chains is reduced, and the dispersion of the TSR9710 modified rubber in SCR10 rubber is facilitated; and then blending the whole latex, the SCR10 rubber and the naturally solidified and dried rubber, and carrying out dry mixing, so as to further promote the uniform dispersion and stable distribution of the SCR10 rubber in the whole latex and the naturally solidified and dried rubber, eliminate two-phase interfaces, and form the TSR9710 modified rubber with stable combination of two phases through secondary crepe, secondary dry mixing, crushing and drying, thereby having good tensile resistance, elongation performance and water impermeability, and also having good processability, low-temperature performance and weather resistance.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A preparation method of TSR9710 modified rubber is characterized by comprising the following steps: the method comprises the following steps:
s10: adding fresh liquid rubber, preservative and accelerator into an internal mixer, mixing the mixture until the acid concentration is 22-25%, and placing the mixture into a solidification tank for 10 hours for curing;
s20: the cured liquid crepe and the tear grains are put into an oven at 110-180 ℃ to be dried for 4 hours, thus obtaining full emulsion;
s30: mixing the prepared full emulsion with SCR No. 10 rubber, naturally solidifying and airing rubber according to the proportion of 1-2:2-3:2-4, and stirring and mixing at the temperature of 80 ℃;
s40: carrying out primary crepe, dry stirring and mixing at 20 ℃, then carrying out secondary crepe, crushing, and drying at 80 ℃ for 3-4 hours;
s50: cooling to 30-40 ℃ to obtain TSR9710 modified rubber;
the fresh liquid rubber in step S10 includes at least one of: isoprene rubber, nitrile rubber, butadiene rubber and styrene butadiene rubber;
the preservative in the step S10 adopts N-phenyl-N ' -isopropyl p-phenylenediamine, N-cyclohexyl-N ' -phenyl-p-phenylenediamine or N-isopropyl-N ' -phenyl-p-phenylenediamine;
the naturally coagulated and air-dried rubber in step S30 is a coagulated rubber cooled to room temperature by fresh liquid rubber.
2. The method for producing a TSR9710 modified rubber according to claim 1, characterized in that: the accelerator in step S10 comprises a mixture of one or more of the following materials: n-tert-butyl-2-benzothiazole sulfenamide, ethylene thiourea.
3. The method for producing a TSR9710 modified rubber according to claim 1, characterized in that: in the step S30, the proportion of the whole latex to the SCR No. 10 rubber and the natural solidification and airing rubber is 1:2:2.
4. The method for producing a TSR9710 modified rubber according to claim 1, characterized in that: in the step S30, the proportion of the whole latex to the SCR No. 10 rubber and the natural solidification and airing rubber is 2:3:4.
5. The method for producing a TSR9710 modified rubber according to claim 1, characterized in that: in the step S30, the proportion of the whole latex to the SCR No. 10 rubber and the natural solidification and airing rubber is 1:3:3.
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| CN202210423152.7A CN114773694B (en) | 2022-04-21 | 2022-04-21 | Preparation method of TSR9710 modified rubber |
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| CN115368647B (en) * | 2022-09-06 | 2023-11-17 | 西双版纳合盛橡胶科技有限公司 | Acid-resistant natural rubber and preparation process and application thereof |
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| JP2006176594A (en) * | 2004-12-21 | 2006-07-06 | Bridgestone Corp | Natural rubber and its manufacturing method |
| CN100496929C (en) * | 2006-05-15 | 2009-06-10 | 海南中化橡胶有限公司 | Working process for producing TSR9710 rubber using ran sheet rubber as raw material |
| CN106243415B (en) * | 2016-01-14 | 2017-11-24 | 济南圣泉集团股份有限公司 | A kind of store method of natural emulsion and obtained latex product |
| CN108044831B (en) * | 2017-12-08 | 2020-10-02 | 海南中化橡胶有限公司 | Method for producing TSR9710 rubber by using standard rubber as raw material |
| CN113773415A (en) * | 2021-09-16 | 2021-12-10 | 中国热带农业科学院橡胶研究所 | Method for improving quality consistency of whole latex |
| CN114230690B (en) * | 2021-12-31 | 2023-04-14 | 中国热带农业科学院橡胶研究所 | Preparation method of low-heat-generation high-performance natural rubber |
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