Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of polybutadiene grafted isoprene rubber and its preparation method and vulcanized rubber and mixed rubber

A technology of polybutadiene and isoprene rubber, which is applied in the field of polybutadiene grafted isoprene rubber and its preparation, vulcanized rubber and mixed rubber, can solve the problem of high viscosity of glue liquid, unfavorable cold flow of raw rubber, Unfavorable heat transfer and other issues

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the progress of the industrialization of isoprene rubber, people in the industry also discovered some disadvantages of rare earth isoprene rubber, such as the excessive viscosity of the glue solution in the late stage of the polymerization reaction, which is not conducive to the heat transfer of the system and the transportation of the glue solution, and the viscosity of the raw rubber. Cold flow is not conducive to storage and transportation and other disadvantages

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of polybutadiene grafted isoprene rubber and its preparation method and vulcanized rubber and mixed rubber
  • A kind of polybutadiene grafted isoprene rubber and its preparation method and vulcanized rubber and mixed rubber

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of polybutadiene grafted isoprene rubber provided by the invention comprises the following steps:

[0025] (1) In the presence of the first catalyst, butadiene is polymerized in the first organic solvent, the conditions of the polymerization reaction are such that the number average molecular weight is 2000-10000, preferably 3000-7500, and the molecular weight distribution is 2-3 polybutadiene, and 80-95 mole % of said polybutadiene contains conjugated double bonds;

[0026] (2) In the presence of a second catalyst, the polybutadiene obtained in step (1) is contacted with isoprene in a second organic solvent, and the contact conditions are such that the polybutadiene and isoprene The diene is copolymerized to obtain a number average molecular weight of 2×10 5 -5×10 5 , preferably 3×10 5 -4×10 5 , a polybutadiene grafted isoprene rubber with a molecular weight distribution of 3-4; based on the total weight of the polybutadiene and isoprene, the...

preparation example 1

[0062] This preparation example is used to illustrate the nickel-based catalyst provided by the present invention and its preparation method.

[0063] Under nitrogen protection at 10 °C, 0.3 mol nickel naphthenate (purchased from Shanghai Minghuan Chemical Co., Ltd., the same below), 3 mol sesquiethyl aluminum chloride, 0.45 mol N-methylpyrrolidone (NMP) and 2 L Hexane was uniformly mixed in a dry aging tank and aged for half an hour to obtain a nickel-based catalyst with a concentration of 0.15 mol / L (calculated as nickel element).

preparation example 2

[0065] This preparation example is used to illustrate the neodymium-based catalyst provided by the present invention and its preparation method.

[0066] Under nitrogen protection, mix 180ml of 0.05mol / L hexane solution of neodymium neodecanoate, 45ml (0.45mol) isoprene and 1kg of hexane, and adjust the temperature to 10°C, add 34ml of A hexane solution of 0.8mol / L diethylaluminum chloride was aged for 15 minutes; after adding 50ml of a hexane solution of triisobutylaluminum with a concentration of 2mol / L, the aging was continued for 24h to obtain a concentration of 0.005mol / L (calculated as neodymium element) neodymium-based catalyst.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
molecular weight distributionaaaaaaaaaa
Branching factoraaaaaaaaaa
molecular weight distributionaaaaaaaaaa
Login to View More

Abstract

The invention provides a kind of polybutadiene grafted isoprene rubber, a preparation method of polybutadiene grafted isoprene rubber / polybutadiene grafted isoprene rubber prepared by the method and the polybutadiene grafted isoprene rubber obtained by the polybutadiene grafted isoprene rubber Butadiene-grafted isoprene rubber compounds and vulcanizates. In the polybutadiene grafted isoprene rubber, based on the total weight of the polybutadiene grafted isoprene rubber, the content of the butadiene structural unit is 0.5-8% by weight, and the isoprene The content of structural units is 92-99.5% by weight; the number average molecular weight of the polybutadiene grafted isoprene rubber is 2×105-5×105, the molecular weight distribution is 3-4, and the branching factor is 0.5-0.98, The content of cis 1,4-structure is 95-99% by weight. The polybutadiene grafted isoprene rubber provided by the invention not only has excellent mechanical properties, but also has better processability. In addition, the preparation method of the present invention is simple and easy to control, can simultaneously efficiently and accurately control the composition and molecular weight of the prepared polymer, and has great industrial application prospects.

Description

technical field [0001] The present invention relates to a kind of polybutadiene grafted isoprene rubber, a kind of preparation method of polybutadiene grafted isoprene rubber and the polybutadiene grafted isoprene rubber and vulcanized rubber and the mixture prepared by the method Rubber mixing. Background technique [0002] In recent years, with the rapid development of my country's automobile industry and highway construction, the demand for natural rubber has continued to rise. However, most parts of our country are located in the subtropical zone, with insufficient natural rubber resources and limited development space. Therefore, realizing the industrialization of synthetic natural rubber has become a hot spot that industry people pay attention to in recent years. Since the microstructure and mechanical properties of rare earth isoprene rubber are most similar to natural rubber, it can partially or even completely replace natural rubber in rubber products using natura...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F279/02C08F236/08C08L51/04
CPCC08F279/02C08F236/02C08F136/06C08F4/70C08F36/04C08J3/24C08L9/00C08F253/00C08F279/00C08L51/04
Inventor 孙伟张杰李传清赵姜维杨亮亮辛益双谭金枚欧阳素芳于国柱
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com