Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for selective hydrogenation of conjugated diolefine polymer

A technology of conjugated diene and polymer, applied in the field of selective hydrogenation of conjugated diene polymer

Inactive Publication Date: 2004-06-09
TAIWAN SYNTHETIC RUBBER
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Can solve the shortcomings of the above three types of hydrogenation catalysts

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

Examples

Experimental program
Comparison scheme
Effect test

reference example 1

[0081] Add 2700 grams of cyclohexane and 90 grams of styrene in the polymerization reactor (inner volume is 5 liters), stir and heat rapidly after adding 0.69 grams of n-butyllithium and THF with 40 times the molar number of n-butyllithium React at 60°C for 3 hours, then add 210 grams of 1,3-butadiene, and then polymerize at 60°C for 2 hours, add 0.9 grams of benzene to the block styrene-butadiene active copolymer solution Phenyl acid coupling, then 29.5% of bound styrene, 43% of 1,2-vinyl content, number average molecular weight of 9.5×10 4 of polymers.

reference example 2

[0083] Add 2600 grams of hexanaphthene, 45 grams of styrene in the polymerization reactor (inner volume is 5 liters), stir rapidly after adding 0.35 grams of n-butyllithium and THF of n-butyl molarity 30 times and heat to React at 60°C for 2 hours, then add 220 grams of 1,3-butadiene and react at 60°C for 2 hours, then add 45 grams of styrene and react at 60°C for 2 hours, and finally add n-butyl Deactivation of methanol with 4 times the number of moles of base lithium yields 29.0% bound styrene, 35% 1,2-vinyl content, and a number-average molecular weight of 9.0×10 4 of polymers.

Embodiment 1

[0099] In the glove box, 0.189 g of biscyclopentadienyl cobalt (II) was dissolved in 100 ml of cyclohexane, and 1.1 ml of n-butyllithium was added as a reducing agent, and the solution was fully stirred for more than 5 hours. The solution of Reference Example 2 was diluted with cyclohexane until the weight percentage of the polymer was 7.3%. 330 grams of the diluted polymer solution was injected into an autoclave with an inner volume of 1 liter. Use nitrogen to remove internal gas impurities, and inject 24ml of prepared hydrogenation catalyst solution, and finally inject hydrogen, and keep 251kg / cm 2 The pressure and the hydrogenation at 80 ° C, the reaction is roughly as follows:

[0100] Reaction time 60min 120min 180min 240min 300min

[0101] Residual amount of trans double bonds (%) 7.2 2.2 0 0 0

[0102] 1,2-vinyl double bond residue (%) 0.2 0 0 0 0

[0103] Hydrogenation rate (%) 95.7 99.2 100 100 100

[0104] Hydrogenation rate of benzene ring (%) <1 <1 <1 <1 <1

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

No PUM Login to View More

Abstract

A process for selective hydrogenation of conjugated diene polymer includes the reaction of conjugated diene polymer with hydrogen in inertial solvent in the presence of special catalyst. Said special catalyst is composed of components A and B. Component A is at least one compound of group 8 transition metals including Co, Ni, Rh, Pd, Pt and Ir, whose core is substituted or non-substituted cyclopentadiolefin. Component B is at least one C-H-Li compound or lithium hydride containing at least one Li atom.

Description

technical field [0001] The present invention relates to a method for selectively hydrogenating a conjugated diene polymer, thereby enhancing the properties of the polymer such as weather resistance, heat resistance, oxidation resistance, ozone resistance, and color change resistance. More specifically, the present invention relates to the use of a hydrogenation catalyst comprising at least one special nickel compound and / or at least one special cobalt compound and an organolithium reducing agent or an active polymer under mild hydrogenation conditions. A method for the permanent hydrogenation of unsaturated olefinic double bonds within conjugated diene units in polymers. Background technique [0002] At present, polymers containing unsaturated olefinic double bonds in polymer molecular chains are often obtained industrially through polymerization or copolymerization of conjugated diene monomers. Such polymers can be advantageously used in vulcanization methods, however, due...

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
IPC IPC(8): C08C19/02C08F8/04C08F36/00C08F36/04
CPCC08F8/04C08C19/02
Inventor 谢其诚杨文贤蒋见超
Owner TAIWAN SYNTHETIC RUBBER