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Hydrogenation of diene-based polymer latex

A technology of polymer glue and polymer, applied in applications, hangers, clothing, etc.

Active Publication Date: 2010-09-15
LANXESS CORP (CA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, both approaches suffer from deficiencies in order to achieve high conversion and eliminate gel formation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A 300 ml glass lined stainless steel autoclave with temperature control, stirrer and hydrogen addition point was used. A butadiene-acrylonitrile polymer latex with a limited acrylonitrile content of about 38% by weight and a Mooney viscosity (ML1+4 @ 100°C) of about 29 was used. The solids content of the latex was 14.3% by weight. The average diameter of the polymer particles in the latex is about 75 nm. 50ml of this latex, 100ml of water, 0.0378g of catalyst RhCl (PPh 3 ) 3 and 0.594g PPh 3 . The latex was then degassed with hydrogen. The temperature was raised to 145°C and the hydrogen pressure was increased to 900 psi (6.1 MPa). The results are shown in Table 3. After 87 hours, the degree of hydrogenation reached 92%. No gel was produced and the resulting polymer was soluble in methyl ethyl ketone.

Embodiment 2

[0065] The same procedure as described in Example 1 was used. But using 100ml latex, 50ml water, 0.0698g catalyst and 0.695g PPh 3 , the hydrogen pressure is 1000psi (6.8MPa), and the temperature is 145°C. The results obtained are shown in Table 3. The degree of hydrogenation reached 91% in 93 hours, and no gel was produced.

Embodiment 3

[0067] The same procedure as described in Example 1 was used. But using 100ml latex, no water, 0.06g catalyst and 0.6g PPh 3 , the hydrogen pressure is 1000psi (6.8MPa), and the temperature is 145°C. The results obtained are shown in Table 3. The degree of hydrogenation reached 94% in 163 hours, and no gel was produced.

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Abstract

The present invention relates to a process for the hydrogenation of the carbon-carbon double bonds in diene based polymer latex.

Description

technical field [0001] This invention relates to a process for the hydrogenation of carbon-carbon double bonds in diene-based polymers. Background technique [0002] It is known that treating a polymer in organic solution with hydrogen gas in the presence of a catalyst can successfully hydrogenate the carbon-carbon double bonds in the polymer. The method is selective to the double bonds being hydrogenated, eg, does not hydrogenate double bonds within aryl or cycloalkyl groups and does not affect double or triple bonds between carbon and other atoms such as nitrogen or oxygen. There are many examples of catalysts suitable for this hydrogenation in the art, including those based on cobalt, nickel, rhodium, osmium and ruthenium. The suitability of the catalyst depends on the desired degree of hydrogenation, the rate of the hydrogenation reaction and the presence of other groups such as carboxyl and nitrile groups in the polymer. [0003] US 6 410 657 tea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/04C08F4/06C08F36/04C08C19/02
CPCC08C19/02C08F8/04A47G25/0692A47G25/0664
Inventor G·L·伦佩尔潘勤敏吴家龙
Owner LANXESS CORP (CA)