阅读说明：本技术 一种钢丝包胶及使用该钢丝包胶的胎圈 (Steel wire rubber coating and tire bead using same ) 是由 胡付存 杨全林 李文建 李放 于 2020-07-03 设计创作，主要内容包括：一种钢丝包胶及使用该钢丝包胶的胎圈,所述钢丝包胶包括如下质量份数的原料：橡胶：100-130份；白炭黑：2-4份；炭黑：3-6份；褐煤蜡：0.2-0.5份；硫磺：0.5-1份；氧化锌：1-3份；防老化剂：2-4份；酚醛树脂：4-6份；轮胎热解油：3-6份。本申请采用改性之后的炭黑作为轮胎中的添加剂,并辅以酚醛树脂以及轮胎热解油,使得包胶整体的接触微观柔软程度有一定的提高,但是整体结构的刚度并没有降低,且对于钢丝具有更好的相容性,不易发生由于部分脱离而导致的结构损坏等不良影响。(The steel wire rubber coating comprises the following raw materials in parts by mass: rubber: 100 and 130 parts; white carbon black: 2-4 parts; carbon black: 3-6 parts; montan wax: 0.2-0.5 part; sulfur: 0.5-1 part; zinc oxide: 1-3 parts; an anti-aging agent: 2-4 parts; phenolic resin: 4-6 parts; tire pyrolysis oil: 3-6 parts. The application adopts the modified carbon black as the additive in the tire and is supplemented with the phenolic resin and the tire pyrolysis oil, so that the contact microscopic softness degree of the whole rubber coating is improved to a certain extent, but the rigidity of the whole structure is not reduced, the steel wire has better compatibility, and the adverse effects such as structural damage caused by partial separation are not easy to occur.)

1. The steel wire rubber coating is characterized in that: the steel wire rubber coating comprises the following raw materials in parts by weight: rubber: 100 and 130 parts; white carbon black: 2-4 parts; carbon black: 3-6 parts; montan wax: 0.2-0.5 part; sulfur: 0.5-1 part; zinc oxide: 1-3 parts; an anti-aging agent: 2-4 parts; phenolic resin: 4-6 parts; tire pyrolysis oil: 3-6 parts.

2. The steel wire encapsulation according to claim 1, characterized in that: the tire pyrolysis oil is obtained according to the following method: and (3) placing the tire in a pyrolysis furnace, wherein the pyrolysis temperature is 420-500 ℃, the absolute pressure of the operation is 0.07-0.09MPa, and condensing the obtained gas to obtain the tire pyrolysis oil.

3. The steel wire encapsulation according to claim 2, characterized in that: the tire pyrolysis oil is a fraction of the primary oil obtained after condensation, and the fraction at the temperature of 300-400 ℃ obtained by distilling the primary oil is the tire pyrolysis oil.

4. The steel wire encapsulation according to claim 1, characterized in that: the rubber comprises the following raw materials in percentage by mass: natural rubber: 30-50 parts; butadiene rubber: 70-80 parts.

5. The steel wire encapsulation according to claim 1, characterized in that: the montan wax is residue obtained by repeatedly washing lignite with toluene as a solvent to obtain a solution containing an extract, and then distilling off the solvent from the toluene under mild conditions.

6. The steel wire encapsulation according to claim 1, characterized in that: the steel wire rubber coating is prepared according to the following steps: firstly, toluene is extracted from lignite by using toluene to obtain a toluene solution of montan wax or the montan wax is dissolved in the toluene to obtain the toluene solution, then carbon black is put into the toluene solution, and after full stirring, micro-negative pressure constant pressure drying is carried out to obtain the carbon black attached with the montan wax;

and putting the carbon black, the rubber, the white carbon black, the zinc oxide and the anti-aging agent attached with the montan wax into an internal mixer for primary internal mixing, cooling, then adding sulfur, phenolic resin and tire pyrolysis oil for secondary internal mixing to obtain the steel wire encapsulation.

7. The steel wire encapsulation according to claim 6, characterized in that: and (3) placing the carbon black into an ultrasonic cleaning machine in the process of immersing the carbon black into the toluene solution, wherein the ultrasonic vibration time is not less than 30 min.

8. The steel wire encapsulation according to claim 6, characterized in that: carrying out primary banburying, primary cooling and primary standing treatment, wherein the primary standing time is not less than 3 h; carrying out secondary banburying, carrying out secondary cooling and then carrying out secondary standing treatment, wherein the time of the secondary standing is not less than 5 hours; and vulcanizing the tire tread after secondary standing to obtain the low tire noise tire tread.

9. A bead encapsulated with a steel wire according to any one of claims 1 to 8, characterized in that: the preparation method comprises the following steps: and placing the rubber coating in a rolling machine, introducing the steel cord into the rolling machine at equal intervals, and attaching the rubber coating to the surface of the steel cord at the temperature of not lower than 100 ℃.

10. A bead according to claim 9, wherein: the calender is a four-roller calender.

Technical Field

The application relates to a steel wire rubber coating and a tire bead using the same.

Background

The bead, also called a bead, refers to the portion of the tire mounted on the rim. The tyre bead is an important bearing part of the tyre, firstly the tyre bead needs to bear the pressure in the tyre to overcome the transverse force action on the tyre, and secondly the tyre bead needs to have strong strength and is not easy to deform. At present, the deformation resistance is mainly realized by a mode of arranging steel wires inside, and rubber coating is arranged outside the steel wires, so that the steel wires are firstly integrated, and secondly, the rubber coating is better integrated with other parts of the tire. Because the finally obtained tire bead has the requirements of strength and sealing property, and the requirement of sealing property is the requirement of local flexibility, only when the tire bead is subjected to large lateral force, the tire bead cannot be damaged, and the occurrence of malignant accidents is ensured as far as possible.

Disclosure of Invention

In order to solve the problems, the application provides a steel wire rubber coating on one hand, which comprises the following raw materials in parts by mass: rubber: 100 and 130 parts; white carbon black: 2-4 parts; carbon black: 3-6 parts; montan wax: 0.2-0.5 part; sulfur: 0.5-1 part; zinc oxide: 1-3 parts; an anti-aging agent: 2-4 parts; phenolic resin: 4-6 parts; tire pyrolysis oil: 3-6 parts. The application adopts the modified carbon black as the additive in the tire and is supplemented with the phenolic resin and the tire pyrolysis oil, so that the overall flexibility of the rubber coating is improved to a certain extent, but the rigidity of the whole structure is not reduced, the steel wire has better compatibility, and the adverse effects such as structural damage caused by partial separation are not easy to occur.

Preferably, the tire pyrolysis oil is obtained according to the following method: and (3) placing the tire in a pyrolysis furnace, wherein the pyrolysis temperature is 420-500 ℃, the absolute pressure of the operation is 0.07-0.09MPa, and condensing the obtained gas to obtain the tire pyrolysis oil.

Preferably, the tire pyrolysis oil is a fraction of the primary oil obtained after condensation, and the fraction at 400 ℃ obtained by distilling the primary oil is the tire pyrolysis oil. The purpose that this application adopted tire pyrolysis oil is mainly to strengthen the combination degree of phenolic resin and rubber to through the strong combination of phenolic resin and rubber, make can promote the rubber coating greatly and adhere to the wholeness behind the steel wire.

Preferably, the rubber comprises the following raw materials in percentage by mass: natural rubber: 30-50 parts; butadiene rubber: 70-80 parts.

Preferably, the montan wax is a residue obtained by repeatedly washing montan with toluene as a solvent to obtain a solution containing an extract, and then distilling off the solvent from the toluene under mild conditions.

Preferably, the steel wire encapsulation is prepared as follows: firstly, toluene is extracted from lignite by using toluene to obtain a toluene solution of montan wax or the montan wax is dissolved in the toluene to obtain the toluene solution, then carbon black is put into the toluene solution, and after full stirring, micro-negative pressure constant pressure drying is carried out to obtain the carbon black attached with the montan wax;

and putting the carbon black, the rubber, the white carbon black, the zinc oxide and the anti-aging agent attached with the montan wax into an internal mixer for primary internal mixing, cooling, then adding sulfur, phenolic resin and tire pyrolysis oil for secondary internal mixing to obtain the steel wire encapsulation.

Preferably, the carbon black is placed in an ultrasonic cleaning machine during the process of immersing the carbon black in the toluene solution, and the ultrasonic vibration time is not less than 30 min.

Preferably, after once banburying, once cooling and then carrying out once standing treatment, wherein the time of once standing is not less than 3 hours; carrying out secondary banburying, carrying out secondary cooling and then carrying out secondary standing treatment, wherein the time of the secondary standing is not less than 5 hours; and vulcanizing the tire tread after secondary standing to obtain the low tire noise tire tread. This application adopts the mode of secondary banburying, mainly be for adjusting phenolic resin's combination time, the raw materials through once banburying have basically carried out intensive mixing, if add phenolic resin wherein, difficult play local moulding's effect, but whole improvement, and add at the secondary banburying, then under the prerequisite that rubber network formed basically, make phenolic resin get into wherein, can play the contradiction between harmonious softness degree and deformability, make can have under the prerequisite of better flexibility at external butt portion, whole rigidity can accord with technical requirement again after adding the steel wire.

On the other hand, the application also discloses a tire bead, which is prepared according to the following method: and placing the rubber coating in a rolling machine, introducing the steel cord into the rolling machine at equal intervals, and attaching the rubber coating to the surface of the steel cord at the temperature of not lower than 100 ℃.

Preferably, the calender is a four-roll calender.

This application can bring following beneficial effect:

1. the modified carbon black is used as an additive in the tire, and the phenolic resin and the tire pyrolysis oil are used as auxiliary materials, so that the overall flexibility of the rubber coating is improved to a certain extent, but the rigidity of the overall structure is not reduced, the steel wire has better compatibility, and the adverse effects such as structural damage and the like caused by partial separation are not easy to occur;

2. the purpose of adopting the tire pyrolysis oil is mainly to enhance the bonding degree of the phenolic resin and the rubber, and the integrity of the rubber coating after being attached to the steel wire can be greatly improved through the strong bonding of the phenolic resin and the rubber;

3. this application adopts the mode of secondary banburying, mainly be for adjusting phenolic resin's combination time, the raw materials through once banburying have basically carried out intensive mixing, if add phenolic resin wherein, difficult play local moulding's effect, but whole improvement, and add at the secondary banburying, then under the prerequisite that rubber network formed basically, make phenolic resin get into wherein, can play the contradiction between harmonious softness degree and deformability, make can have under the prerequisite of better flexibility at external butt portion, whole rigidity can accord with technical requirement again after adding the steel wire.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present application will be explained in detail through the following embodiments.

S1, preparing raw materials:

tire pyrolysis oil: placing the tire in a pyrolysis furnace, wherein the pyrolysis temperature is 420-500 ℃, the absolute pressure of operation is 0.07-0.09MPa, condensing the obtained gas to obtain tire pyrolysis oil, and distilling the primary oil obtained after condensation to obtain 300-400 ℃ fraction which is the tire pyrolysis oil;

modified carbon black: repeatedly washing lignite by using toluene as a solvent to obtain a solution containing an extract, wherein the mass ratio of the toluene to the dried lignite is 1:1, adding carbon black after the extract is colorless and transparent, fully stirring, and then drying under a micro-negative pressure and a constant pressure to obtain carbon black attached with montan wax, and measuring the relative amount of residual montan wax toluene before and after the carbon black is attached to obtain the mass ratio of the carbon black to the montan wax;

s2, tire tread banburying:

putting the carbon black, the rubber, the carbon black, the montan wax, the silane coupling agent, the stearic acid and the paraffin wax attached with the montan wax into an internal mixer for primary internal mixing, carrying out primary standing treatment after primary cooling, wherein the primary standing time is 3 hours, then adding the sulfur, the phenolic resin and the tire pyrolysis oil for secondary internal mixing, carrying out secondary standing treatment after secondary cooling, and the secondary standing time is 5 hours; the contents of the components are shown in Table 1;

table 1:

s3, preparing a tire bead:

and S2, obtaining a rubber coating material, placing the rubber coating material in a four-roll calender, introducing the steel cord into the calender at equal intervals, and coating rubber on the surface of the steel cord at the temperature of 100 ℃ to obtain the tire bead.

S4, measuring the tensile strength and the steel wire bonding strength of the tire bead, wherein the specific data are shown in Table 2.

Table 2:

serial number	Tensile strength (Mpa)	Adhesion strength to Steel wire (N/50mm)
			1	23	2500
2	25	2450
			3	22	2600
4	18	1800
			5	19	1850
6	19	1700
			7	17	1650
8	18	1600
			5	18	1750

Therefore, the carbon black, the phenolic resin and the tire pyrolysis oil which are modified by the montan wax can greatly improve the tensile strength and the bonding strength with steel wires, and have more optimized properties compared with paraffin modified carbon black or unmodified carbon black and no phenolic resin or tire pyrolysis oil, so that the mechanical property of the tire bead is greatly improved.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.