阅读说明：本技术 一种特定硼杂化甲基乙烯基mq硅树脂及其应用 (Specific boron-hybridized methyl vinyl MQ silicon resin and application thereof ) 是由 朱佳媚 于 2017-10-31 设计创作，主要内容包括：本发明涉及一种特定硼杂化甲基乙烯基MQ硅树脂,以-O-B-O、-O-Si-O为骨架,以乙烯基为活性官能团,其制备方法为：向反应器中加入15份正硅酸酯、4～8份甲基烷氧基硅烷、5～10份硼酸衍生物、10～20份二甲基乙烯基氯硅烷、20份二甲苯,加热至70℃～80℃,然后加入10份10％酸催化剂,反应2～4小时得水解液；向水解液中加入烧碱调至pH＝10,加热水解液至80℃,减压蒸馏进行缩聚反应1h,然后加入硫酸钙,升温至120℃继续减压蒸馏进行缩聚反应1h,得缩聚产物；用去离子水洗涤缩聚产物至中性,真空干燥得所述的特定硼杂化甲基乙烯基MQ硅树脂。制成的特定硼杂化甲基乙烯基MQ硅树脂增粘效果较传统增粘树脂效果好、具有自阻燃效果。(The invention relates to a specific boron hybridized methyl vinyl MQ silicon resin, which takes-O-B-O and-O-Si-O as a framework and vinyl as an active functional group, and the preparation method comprises the following steps: adding 15 parts of orthosilicate ester, 4-8 parts of methylalkoxysilane, 5-10 parts of boric acid derivative, 10-20 parts of dimethylvinylchlorosilane and 20 parts of xylene into a reactor, heating to 70-80 ℃, adding 10 parts of 10% acid catalyst, and reacting for 2-4 hours to obtain hydrolysate; adding caustic soda into the hydrolysate to adjust the pH value to 10, heating the hydrolysate to 80 ℃, carrying out polycondensation reaction for 1h by reduced pressure distillation, then adding calcium sulfate, heating to 120 ℃, and continuing to carry out polycondensation reaction for 1h by reduced pressure distillation to obtain a polycondensation product; washing the polycondensation product with deionized water to neutrality, and vacuum drying to obtain the specific boron-hybridized methyl vinyl MQ silicon resin. Compared with the traditional tackifying resin, the prepared specific boron-hybridized methyl vinyl MQ silicon resin has better tackifying effect and self-flame retardant effect.)

1. A specific boron hybridized methyl vinyl MQ silicon resin is characterized in that-O-B-O, -O-Si-O is used as a framework, vinyl is used as an active functional group, and the preparation method comprises the following steps: adding 15 parts of orthosilicate ester, 4-8 parts of methylalkoxysilane, 5-10 parts of boric acid derivative, 10-20 parts of dimethylvinylchlorosilane and 20 parts of xylene into a reactor, heating to 70-80 ℃, adding 10 parts of 10% acid catalyst, and reacting for 2-4 hours to obtain hydrolysate; adding caustic soda into the hydrolysate to adjust the pH value to 10, heating the hydrolysate to 80 ℃, carrying out polycondensation reaction for 1h by reduced pressure distillation, then adding calcium sulfate, heating to 120 ℃, and continuing to carry out polycondensation reaction for 1h by reduced pressure distillation to obtain a polycondensation product; washing the polycondensation product with deionized water to neutrality, and vacuum drying to obtain the specific boron-hybridized methyl vinyl MQ silicon resin.

2. The specific boron-hybrid methyl vinyl MQ silicone resin as claimed in claim 1, wherein the methyl alkoxy silane is at least one of hexamethyldisiloxane, methyltrimethoxy silane, methyltriethoxy silane, dimethyldimethoxy silane, dimethyldiethoxy silane.

3. The specific boron-hybridized methyl vinyl MQ silicone resin of claim 1, wherein the boric acid derivative is at least one of boric acid, phenylboronic acid, tributyl borate, tri-n-propyl borate, triisopropyl borate, trimethyl borate, 3-fluorophenylboronic acid, sec-butyl boronic acid, 4-fluorophenylboronic acid, 3-methoxyphenylboronic acid, n-butyl boronic acid, and 2-methoxyphenylboronic acid.

4. The specific boron-hybridized methyl vinyl MQ silicone resin of claim 1, wherein the acidic catalyst is at least one of hydrochloric acid, hydrobromic acid and hydroiodic acid.

5. Use of the specific boron-hybridized methyl vinyl MQ silicone resins prepared as claimed in claim 1 as rubber compositions.

6. The specific boron-hybridized methyl vinyl MQ silicone resins prepared as claimed in claim 1 are used for preparing automobile tires.

Technical Field

The invention relates to a divisional application of Chinese patent 'a rubber composition for treads of medium and large automobile tires', the application date is 2017, 10 and 31, and the application number is 201711049174.7. The invention relates to a specific boron-hybridized methyl vinyl MQ silicon resin and application thereof, belonging to the technical field of synthetic resin.

Technical Field

The tire is one of the most important components of the automobile, the main functions of the tire are to support the whole weight of the automobile, bear the load of the automobile, transmit the torque force of traction and braking, ensure the adhesion between the wheel and the road surface, and the tire is mostly made of rubber materials. However, in recent years, with the development of economy, the number of automobiles is increasing, and the requirement on rubber is increasing, so that not only the wear resistance of the automobile is required, but also the comfort of the automobile is pursued, so that how to reduce and absorb the shock and impact force of the automobile during driving, prevent the automobile parts from being subjected to severe shock and early damage, highly adapt to the high-speed performance of the automobile and reduce the noise during driving is required, and the requirement on rubber tires is increasing, and the technology is required to be improved, and the performance is improved.

Chinese patent CN03818135.5 provides a crosslinkable or crosslinked rubber composition for use in a tire tread having improved wear resistance, and also discloses said tread and tire incorporating said rubber composition, said rubber composition comprising a plasticizing resin having a number average molecular weight of 400-2000g/mol being characterized in that it comprises units derived from vinylcyclohexene. However, the rubber composition of the present invention is required to have improved flame retardancy and grip performance.

Disclosure of Invention

In order to overcome the defects and shortcomings of the prior art, the invention aims to provide a rubber composition for a tread of a medium-large automobile tire.

The invention relates to a rubber composition for treads of medium and large automobile tires, which comprises the following components in parts by weight: the matrix rubber is: 65-75 parts of styrene-butadiene rubber and 25-35 parts of natural rubber; the functional filler is: 30-60 parts of modified fumed silica and 30-60 parts of carbon black; the tackifying resin is: 10-20 parts of specific boron-hybridized methyl vinyl MQ silicon resin and 5-10 parts of synthetic terpene resin; 5-10 parts of a vulcanizing agent and 2-5 parts of a vulcanization accelerator.

The specific boron hybridized methyl vinyl MQ silicon resin takes-O-B-O, -O-Si-O as a framework and vinyl as an active functional group, and the preparation method comprises the following steps: adding 15 parts of orthosilicate ester, 4-8 parts of methylalkoxysilane, 5-10 parts of boric acid derivative, 10-20 parts of dimethylvinylchlorosilane and 20 parts of xylene into a reactor, heating to 70-80 ℃, adding 10 parts of 10% acid catalyst, and reacting for 2-4 hours to obtain hydrolysate; adding caustic soda into the hydrolysate to adjust the pH value to 10, heating the hydrolysate to 80 ℃, carrying out polycondensation reaction for 1h by reduced pressure distillation, then adding calcium sulfate, heating to 120 ℃, and continuing to carry out polycondensation reaction for 1h by reduced pressure distillation to obtain a polycondensation product; washing the polycondensation product with deionized water to neutrality, and vacuum drying to obtain the specific boron-hybridized methyl vinyl MQ silicon resin.

The molecular weight of the styrene-butadiene rubber is 1000000-5000000.

The carbon black is preferably 100 mesh sieve residue<0.1% and nitrogen adsorption specific surface area of 100-130 m²(ii) 120-180 mg/g of iodine adsorption amount.

The melting point of the synthetic terpene resin is 120-150 ℃.

The vulcanizing agent is at least one of dibenzoyl peroxide, tetramethyl thiuram disulfide, barium peroxide, cadmium peroxide, magnesium peroxide, zinc peroxide, bis (2, 4-dichloroformyl) peroxide, di-tert-butyl peroxide, 1, 4-bis-tert-butylperoxyisopropyl benzene, dicumyl peroxide, tert-butyl perbenzoate, tert-butyl cumyl peroxide, dicumyl peroxide, tert-butyl isopropyl carbonate and tert-butyl peroxycarbonate.

The vulcanization accelerator is at least one of zinc dibutyl dithiocarbamate, hexamethylene diamine carbamate, ethylene diamine formate and N, N' -m-phenylene bismaleimide.

The modified fumed silica is fumed silica modified by KH 570.

The methylalkoxysilane is at least one of hexamethyldisiloxane, methyltrimethoxysilane, methyltriethoxysilane, dimethyldimethoxysilane and dimethyldiethoxysilane.

The boric acid derivative is at least one of boric acid, phenylboronic acid, tributyl borate, tri-n-propyl borate, triisopropyl borate, trimethyl borate, 3-fluorophenylboronic acid, sec-butyl boronic acid, 4-fluorophenylboronic acid, 3-methoxyphenylboronic acid, n-butyl boronic acid and 2-methoxyphenylboronic acid.

The acidic catalyst is at least one of hydrochloric acid, hydrobromic acid and hydroiodic acid.

Compared with the prior art, the rubber composition for the tread of the medium and large automobile tire has the following advantages:

(1) styrene-butadiene rubber and natural rubber are used as matrixes, and methyl vinyl MQ silicon resin containing double bonds, vinyl modified fumed silica and rubber are used as auxiliary materials, so that the composition can be crosslinked into a three-dimensional network structure under the action of a free radical vulcanizing agent and a vulcanization accelerator, and the rubber is ensured to have high elasticity.

(2) KH570 modified fumed silica is selected, carbon-carbon double bonds are combined on the surface of the fumed silica through-O-Si-O-, and can participate in the chemical vulcanization process of the rubber, and the fumed silica and the rubber are combined into a whole through chemical bonds, so that the tire rubber of the composition has high wear resistance.

(3) Specific boron-hybridized methyl vinyl MQ silicon resin and terpene resin are used as tackifying resin, wherein the effect of tackifying by the boron-hybridized methyl vinyl MQ silicon resin is better than that of the traditional tackifying resin.

(4) The boron-hybridized methyl vinyl MQ silicon resin is tackified, and simultaneously, the characteristic functional group vinyl can be crosslinked with the vinyl of the main rubber, and the vulcanized rubber tire has improved gripping performance and gripping durability in a balanced manner due to the main chain of the boron-hybridized methyl vinyl MQ silicon resin in which-O-B-O-, -O-Si-O-with larger bond energy is adopted.

(5) The boron-hybridized methyl vinyl MQ silicon resin takes-O-B-O-, -O-Si-O-as a framework, has a self-flame-retardant effect, and does not need to be additionally added with a flame retardant.

Detailed Description

The rubber composition for a tread of a large or medium-sized automobile tire according to the present invention will be further described with reference to the following examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.