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A kind of preparation method and application of resin for improving wet skid resistance of rubber
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A wet skid resistance, resin technology, applied in the field of rubber industry, can solve problems such as increasing fuel consumption, reducing tire service life, and increasing Tanδ value
Active Publication Date: 2020-11-13
JIANGSU QIXIANG HIGH NEW MATERIAL
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[0005] The above-mentioned resins are low-molecular-weight polymers with a high glass transition temperature. Although they can improve wet grip to a certain extent in the rubber composition, there will often be a glass transition of the resin phase in the high-temperature region, resulting in a Tanδ of 60°C. As the value increases, the rolling resistance increases significantly, which affects the mechanical properties of the rubber, reduces the service life of the tire, increases fuel consumption, and forms a waste of non-renewable resources.
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[0068] 3. Add 20g of phenol and xylene mixture dropwise, keep the system temperature at 70-80°C, and stir continuously for 2-3h; the weight ratio of C9 petroleum resin to phenol is 4:1;
[0069] 4. Add water to the reaction solution for extraction, take the upper organic phase and distill under reduced pressure to obtain 90 g of the first step yellow resin product;
[0070] 5. 90g resin product is dissolved in xylene, adds the 3-chloropropyl triethoxysilane of resin product weight simultaneously, adds the NaI of the sodium ethylate of resin product weight 0.4% ...
Embodiment 2
[0072] Embodiment 2 (resin B: preparation of terpene-phenol-silane)
[0073] Replace the C9 resin in Example 1 with a terpene resin, and the rest of the steps are the same, the preparation reaction formula of resin B is as follows, and resin B is obtained.
[0076] The preparation method of functionalized resin C is as follows:
[0077]
[0078] Specific steps:
[0079] 1. In a four-necked flask, cool 50g of xylene solvent to -10°C, add 1% borontrifluoride catalyst based on the weight of xylene solvent, and stir for 0.5h;
[0080] 2. Add 100g ams monomer (a-methylstyrene) dropwise to the reaction system, and control the drop rate to control the system temperature at -8-0°C;
[0081] 3. After adding ams dropwise, continue to add 20g of ENB (5-ethylidene-2-norbornene) and xylene mixture dropwise, keep the system temperature at -8-0°C, and react for 3h; the ams monomer and ENB The weight ratio of (5-ethylidene-2-norbornene) is 4:1;
[0082] 4. Raise the temperature of the system to 70-80°C, and at the same time add 0.3% of the free radical initiator AIBN of the ams monomer weight and 3% of the ams monomer weight of γ-methacryloxypropyltrimethoxysilane ;
[0083] 5. ...
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Abstract
Provided is a preparation method for resin for improving wet skid resistance of rubber, the first step: subjecting R resin and B functional group compound to a reaction, to obtain R-B resin and improve degree of polymerization of R resin; wherein R resin is selected from C9 petroleum resin, C5 petroleum resin, α-methylstyrene homopolymer resin, DCPD resin, terpene resin, pinene resin or copolymerized resin based on α-methylstyrene as a principal chain, B functional group compound is selected from phenol, cardanol, ethylidene norbornene (ENB), rosin, hexa methoxy melamine resin (HMMM) or divinylbenzene; the second step: subjecting R-B resin to a reaction with S silane, to obtain R-B-S resin. The prepared resin is used for being added into the rubber, can be effectively dispersed inside the rubber and is distributed in tire tread during vulcanization, which remarkably improves the wet skid resistance of the rubber.
Description
technical field [0001] The invention belongs to the field of rubber industry, and in particular relates to a method for preparing a resin for improving the wet skid resistance of rubber. Background technique [0002] With the development of the economy and the progress of the society, people have higher and higher requirements on the safety, fuel economy and durability of tires. The indicators to measure these three performances are mainly grip, rolling resistance, and wear. However, improving one performance indicator will often lead to a decrease in other performance indicators, which is the so-called tire devil’s triangle. Therefore, how to effectively balance the devil’s triangle is a key issue for tire companies. important problem. [0003] Among them, among the various parts of the tire, the contribution of the tread to the rolling resistance and wet grip is very important. About 50% of the rolling resistance in the tire comes from the tread, and the braking of the ti...
Claims
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