Liquid polybutadiene, preparation method and application thereof, composition, polymer coating, adhesive and cross-linking agent

A liquid polybutadiene and initiator technology, applied in the direction of conjugated diene adhesives, adhesives, adhesive types, etc., can solve the problem of difficult to achieve low molecular weight liquid polybutadiene preparation, wide molecular weight distribution, peeling Low strength and other problems, to achieve good application prospects, narrow molecular weight distribution, and improve the effect of adhesion

Active Publication Date: 2021-11-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] High-vinyl liquid polybutadiene refers to liquid polybutadiene with a 1,2-structure content of more than 65% by weight. High-vinyl liquid polybutadiene is generally prepared by iron-based, cobalt-based and molybdenum-based catalysts, The above-mentioned catalyst system has the following disadvantages: (1) it is difficult to realize the preparation of low molecular weight liquid polybutadiene; (2) the molecular weight distribution is wide and the peel strength is low; and (3) it contains variable valence metals and has poor weather resistance

Method used

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  • Liquid polybutadiene, preparation method and application thereof, composition, polymer coating, adhesive and cross-linking agent
  • Liquid polybutadiene, preparation method and application thereof, composition, polymer coating, adhesive and cross-linking agent
  • Liquid polybutadiene, preparation method and application thereof, composition, polymer coating, adhesive and cross-linking agent

Examples

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preparation example Construction

[0047] According to the second aspect of the present invention, the present invention provides a method for preparing liquid polybutadiene, the method comprising: under anionic polymerization conditions, 1,3-butadiene and structure regulator and organic lithium The initiator is contacted in a polymerization solvent to obtain a polymerization reaction mixture liquid containing polybutadiene, and the contact is carried out at a temperature not higher than 40°C.

[0048] According to the preparation method of the present invention, the structure regulator contains component A and component B, the component A is one or two or more selected from ethers and amines, and the component B is selected from alkalis One or more than two kinds of metal alkoxides.

[0049] According to the preparation method of the present invention, the component A is one or more selected from the compound shown in formula I and the compound shown in formula II:

[0050]

[0051] In formula I, R 1 and ...

Embodiment 1

[0119] This example is used to illustrate the liquid polybutadiene of the present invention and its preparation method.

[0120] (1) Under nitrogen protection, add cyclohexane, structure regulator 1, structure regulator 2, 1,3-butadiene (see Table 1 for the type and consumption, and the consumption listed in the table) in the 5L reactor All are measured with pure compound), the control reactor temperature is below 10 ℃, in the 5L reactor, add the n-butyllithium of design amount (consumption is shown in Table 1, and the consumption listed in the table is all measured with pure compound); And in the table Carry out anionic polymerization under the temperature and reaction pressure listed in 1 to obtain a polymerization reaction mixture containing polybutadiene.

[0121] (2) add water and acid (concrete consumption and the kind of acid are listed in table 2 in the polymerization reaction mixed solution that step (1) obtains, and the consumption listed in the table is all metered ...

Embodiment 2-7

[0124] Examples 2-7 are used to illustrate the liquid polybutadiene of the present invention and its preparation method.

[0125] Embodiment 2-7 adopts the method identical with embodiment 1 to prepare liquid polybutadiene, difference is, under the condition listed in table 1, prepare the composition PB2-PB7 that contains liquid polybutadiene according to the present invention, Among them, the structural property parameters of the prepared liquid polybutadiene are listed in Table 3.

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Abstract

The invention discloses liquid polybutadiene as well as a preparation method and application thereof. According to the liquid polybutadiene, the number-average molecular weight is 2500-5500, and the molecular weight distribution index is 1-1.2; on the basis of the total amount of the liquid polybutadiene, the content of a 1, 2-structural unit in the liquid polybutadiene is 85-95 wt%, the content of 1, 4-structural unit in the liquid polybutadiene is 5-15wt%, and the molar ratio of the cis-1, 4-structural unit to the trans-1, 4-structural unit in the liquid polybutadiene is (1-2): 1; and the dynamic viscosity of the liquid polybutadiene at 45 DEG C is 100-500P. The liquid polybutadiene disclosed by the invention has good flowing property, film-forming property and coating property, and a coating formed by the liquid polybutadienehas improved adhesive force to a base material.

Description

technical field [0001] The present invention relates to a kind of liquid polybutadiene and its preparation method and application; The present invention also relates to the composition containing said liquid polybutadiene; The present invention further relates to containing said liquid polybutadiene and said composition polymer coatings, adhesives and crosslinkers. Background technique [0002] Liquid polybutadiene is a viscous flowable polymer with a number average molecular weight of 500-10000. It is an oily liquid at room temperature. It has a wide range of uses in coatings, inks, surfactants and polymer modifiers. . [0003] According to the classification of microstructure, liquid polybutadiene can be divided into 1,4-addition (cis and trans isomers) and 1,2-addition products, in 1,2-addition products, according to ethylene According to the base content, it can be divided into medium vinyl liquid polybutadiene and high vinyl liquid polybutadiene. [0004] High-vinyl ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F136/06C08F2/44C08K5/06C08K5/3435C08K5/057C08L9/00C09J109/00
CPCC08F136/06C08F2/44C08K5/06C08K5/3435C08K5/057C08L9/00C09J109/00C08K2201/014C08K5/526C08L23/22C08F4/44C08F4/565C08K5/56C08L9/02C08L2201/52C09D109/00
Inventor 李建成邵明波刘天鹤
Owner CHINA PETROLEUM & CHEM CORP
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