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A kind of functionalized elastomer and modified asphalt and preparation method thereof

An elastomer and functionalized technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of inability to take into account the conversion rate and effective improvement of modifiers, and poor compatibility with asphalt.

Active Publication Date: 2018-10-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect that the existing method cannot take into account the conversion rate of the modifier and effectively improve the contact angle of the elastomer, resulting in poor compatibility with asphalt, and to provide a method that can take care of the modifier Conversion rate and preparation method of functionalized elastomer effective in improving the contact angle of the elastomer and thereby enhancing the compatibility with asphalt

Method used

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  • A kind of functionalized elastomer and modified asphalt and preparation method thereof
  • A kind of functionalized elastomer and modified asphalt and preparation method thereof
  • A kind of functionalized elastomer and modified asphalt and preparation method thereof

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preparation example Construction

[0017] The preparation method of the functionalized elastomer provided by the present invention is characterized in that the method includes contacting the elastomer with a modifier, a stabilizer and an initiator in an inert atmosphere, and the conditions of the contact are such that the modifier Chemically bonded to the elastomer to functionalize the elastomer; the elastomer is a block copolymer having a double bond in the side chain capable of chemically reacting with a modifier having the formula (I) At least one of the mercaptosilane of the shown structure, the substance containing both mercapto and hydroxyl groups in the molecule, and the substance containing both mercapto and carboxyl groups in the molecule:

[0018]

[0019] Among them, R 1 -R 4 for C 1 -C 20 straight-chain or branched-chain hydrocarbon groups or C containing heteroatoms 1 -C 20 A linear or branched hydrocarbon group, the heteroatom is selected from one or more of halogen, oxygen, sulfur, silico...

Embodiment 1

[0208] This example is used to illustrate the modified styrene-butadiene-styrene block copolymer provided by the present invention and its preparation method.

[0209] Synthesize styrene-butadiene-styrene block copolymer according to the method of comparative example 1, then add 3.4ml (4.1g) 3-mercaptopropionic acid, 31.7mg antioxidant 1010 thereinto, add 634.3 after heating to 70 ℃ mg of azobisisobutyronitrile, reacted at 70°C for 2 hours to obtain a modified styrene-butadiene-styrene block copolymer, sampled and dried in vacuum at 60°C for 24h, then carried out H NMR spectrum test. The test result shows that the content of the vinyl structural unit is 13.3%, and the molar percentage content of the propionic acid structural unit is 0.8%. The nuclear magnetic spectrum proves that the modifier has been bonded to the polymer chain, and the above-mentioned product before drying is detected by gas chromatography, in which no 3-mercaptopropionic acid is detected, indicating that th...

Embodiment 2

[0211] This example is used to illustrate the modified styrene-butadiene-styrene block copolymer provided by the present invention and its preparation method.

[0212] (1) Under the protection of high-purity nitrogen, 2200g cyclohexane, 45g styrene and 4.4mmol THF were successively added to a 5-liter stainless steel stirred tank, and 4.4mmol n-butyllithium was added after heating to 50°C to initiate. 1 hour after the start of the polymerization reaction, 170 g of isoprene was added, and after the reaction was continued for 1 hour, 45 g of styrene was added again, and the reaction was continued for 1 hour to obtain a styrene-butadiene-styrene block copolymer. It is measured that the conversion rate of butadiene reaches 100%, the total content of vinyl structural units and 3,4-PI structural units is 13.9 mol%, the number average molecular weight (Mn) is 121,000, and the molecular weight distribution (Mw / Mn) is 1.04 , the sum of the number average molecular weight of the two styr...

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Abstract

The present invention provides a functionalized diolefin polymer preparation method, which comprises that a diolefin polymer containing at least a conjugated diolefin structure unit contacts a modifier, a stabilizer and an initiator in an inert atmosphere, such that the modifier is chemically bonded to the diolefin polymer through the contacting condition, wherein the average molecular weight of the diolefin polymer is 50000-1000000, the content of the conjugated diolefin structure unit having the double bond on the side chain is 15-85 wt% by adopting the weight of the conjugated diolefin structure unit as the reference, the modifier is at least one selected from mercaptosilane having a structure represented by a formula (I), a substance concurrently containing a mercapto group and a hydroxyl group in the molecule, and a substance concurrently containing a mercapto group and a carboxyl group, and the stabilizer is one or a plurality of materials selected from an arylamine type antioxidant, a hindered phenol type antioxidant and a phosphite antioxidant. According to the present invention, with the method, the conversion rate of the modifier is substantially and completely achieved, and the relation between the wet skid resistance and the rolling resistance can be effectively improved. The formula (I) is defined in the specification.

Description

technical field [0001] The invention relates to a preparation method of a functionalized elastomer, a functionalized elastomer prepared by the method and a modified asphalt containing the functionalized elastomer as an asphalt modifier. Background technique [0002] Thermoplastic elastomer Styrene-butadiene-styrene block copolymer (SBS) is a block copolymer synthesized from two monomers of styrene and butadiene, which has both plastic melt processability and rubber elasticity. An important application field of SBS at present is the laying of modified asphalt for highway pavement. Facts have proved that the comprehensive performance of SBS modified asphalt is the best among polymer modified asphalt, which can significantly improve the low-temperature plasticity, high-temperature stability, aging resistance, adhesion, elasticity, and stability of the mixture of asphalt, and improve the asphalt. Wear resistance and service life and other properties. [0003] Due to the large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C19/25C08C19/20C08F297/04C08F8/34C08L95/00C08L53/02
Inventor 刘孟轲梁爱民王妮妮刘辉孙文娟康新贺徐林李传清王雪
Owner CHINA PETROLEUM & CHEM CORP