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A kind of preparation method of modified aromatic petroleum resin

A technology for the modification of aromatic petroleum resins, applied in the field of petroleum resins, can solve the problems of complex molecular structure, wide molecular weight distribution, and high glass transition temperature, and achieve the effects of low fluorescence intensity, strong molecular rigidity, and high aromaticity

Active Publication Date: 2021-12-21
NINGBO YONGHUA RESIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the above-mentioned published documents, the content involved is basically that styrene and its derivatives are used as the main comonomer to participate in the Friedel-Crafts alkylation reaction catalyzed by Lewis acid, etc., and a large number of conjugated diene groups in the reaction monomer are present in the Under the action of temperature, different Diels-Alder addition reactions will occur to produce ring structures, so similar to synthetic resins, the molecular structure is complex, the molecular weight distribution is wide, the glass transition temperature is high, and the scope of use is limited.

Method used

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  • A kind of preparation method of modified aromatic petroleum resin
  • A kind of preparation method of modified aromatic petroleum resin
  • A kind of preparation method of modified aromatic petroleum resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix 4-MS and DVB at a mass ratio of 1:0.02 to obtain the ingredients, put 50% of the total mass of methylcyclohexane and 0.8% of boron trifluoride ether catalyst into the reactor with stirring, and fill it with N 2 protection, and then slowly add the ingredients dropwise at -20°C, the reaction time is 1h; after the dropwise addition is completed, the temperature is raised to 45°C, and MAH accounting for 0.2% of the total material mass is added, and the reaction is 20min to obtain a polymer resin liquid; the above polymer resin liquid is Wash with 15% sodium hydroxide lye, wash with water several times until neutral, and remove the catalyst; then rectify under reduced pressure to 240°C under vacuum degree -0.085MPa, remove solvent and oligomer, and obtain the softening point 101.5°C, Gardner color number 2.5#, Mw 940, aromaticity 44.6% modified aromatic petroleum resin.

Embodiment 2～4

[0027] Taking 4-MS and DVB as raw materials, under the same process conditions as in Example 1, changing the DVB content in the batching has the following effects on the performance of the modified aromatic petroleum resin:

[0028] DVB ratio Softening Point Color thermal stability mw Transmittance Aromaticity Example 2 0∶1 93.5℃ 2.1 6.0 875 75％ 52.2 Example 3 0.03∶1 105.6℃ 2.3 5.5 1090 86％ 42.8 Example 4 0.05∶1 114.0℃ 2.5 5.4 1240 90％ 40.1

[0029] It can be seen from the above table that the softening point, color number, weight average molecular weight Mw and light transmittance of the modified aromatic petroleum resin all increase with the increase of the proportion of DVB in the ingredients, while the thermal stability gradually decreases. That is, DVB as a modifying component can increase the degree of internal crosslinking of resin molecules, increase the molecular weight and softening point, and improve the...

Embodiment 5～8

[0031]

[0032] In embodiment 5~8, all the other process conditions are identical with embodiment 1.

[0033] It can be seen from the above table that with the increase of MAH addition, the softening point and Mw of the modified aromatic petroleum resin will decrease significantly, and the acid value will increase accordingly, but at the same time, the color number of the resin will be significantly deteriorated. By adjusting the MAH reaction time, the performance of the modified aromatic petroleum resin is less affected, and the color number and acid value of the resin are only slightly increased.

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Abstract

The invention relates to a preparation method of modified aromatic petroleum resin, which comprises using methylstyrene or its derivatives and divinylbenzene as ingredients, adding maleic anhydride to react after catalytic reaction, finally removing catalyst and solvent and Oligomers yield modified aromatic petroleum resins. The process of the invention is simple, the reaction conditions are mild, and the prepared aromatic hydrocarbon petroleum resin has light color number, high aromaticity, high transparency, strong molecular rigidity, good compatibility with BR, SBR and other rubbers, and can effectively improve its resistance. Wet and slippery, and the softening point and molecular weight are easy to adjust, suitable for the modification of rubber, plastics, and hot-melt adhesives.

Description

technical field [0001] The invention belongs to the field of petroleum resins, in particular to a preparation method of modified aromatic petroleum resins. Background technique [0002] Petroleum resin is a solid or viscous liquid medium-low relative molecular weight polymer obtained by catalyzed polymerization or free radical polymerization with the by-product C5 and C9 fractions of the ethylene plant as the main raw material. According to the monomer and molecular structure of the resin, it can be roughly divided into aromatic petroleum resin, aliphatic petroleum resin, alicyclic petroleum resin, hydrogenated modified petroleum resin, etc. The aromatic petroleum resins include C9 petroleum resins, C5 / C9 copolymerized petroleum resins, styrene-indene resins, and the like. [0003] In the above-mentioned conventional aromatic petroleum resins, the polymerized monomers are usually mainly styrene, α-methylstyrene and indene and their derivatives. For example, US Pat. No. 6,3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/12C08F212/36C08F222/06
CPCC08F212/12C08F212/36C08F222/06
Inventor 王斌孙向东贾立朋
Owner NINGBO YONGHUA RESIN
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