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Hydrogenation method for thermoplastic elastomer in series of styrene

A thermoplastic elastomer and thermoplastic elastic technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve the problem of difficult recovery of precious metal catalysts, increased production costs, and unnecessary Safety and environmental protection and other issues, to achieve stable and reliable preparation process, increased hydrogenation degree, and good hydrogenation effect

Inactive Publication Date: 2007-10-10
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited solubility of the elastomer in the solvent and the certain limitation of the solution viscosity by the hydrogenation process, the recovery of the precious metal catalyst is not easy to complete, the unsafe high-pressure hydrogenation and the impact of solvent loss on the environment make this hydrogenation process possible. It is quite difficult and greatly increases the production cost, so it is urgent to improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take by weighing 100 grams of SBS solution (solid content 20%), add in the there-necked flask that stirs is housed, add the graft copolymer of 1.0 grams of SBS and hydrophilic monomer maleic anhydride, 1.6 grams of OP-10 wherein, 0.6 g of DBSNa, 60 ml of distilled water, stirred at high speed to emulsify. After the emulsion was stabilized, the water bath was heated to 70°C, and the solvent cyclohexane in the emulsion was distilled off. Add 10 ml of hydrazine hydrate and CuSO with a concentration of 8.0 mmol / l successively in the obtained latex 4 1ml of the solution was used as a catalyst. Heat to 55°C, start to drop 15ml of H 2 o 2 After 5 hours of dripping, keep warm for another two hours, pour the hydrogenated emulsion into acetone to demulsify and coagulate to obtain wet glue. Rinse the wet glue repeatedly with distilled water until it becomes neutral, then soak it in a solvent containing anti-aging agent 264 for 24 hours, take out the wet glue after soaking and ...

Embodiment 2

[0020] Take by weighing 100 grams of SBS solution (solid content 20%), add in the there-necked flask that stirs is housed, add the graft copolymer of 1.5 grams of SBS and hydrophilic monomer acrylamide wherein, 2.0 grams of TritonX-100, DBSNa. .8 grams, 60ml of distilled water, high-speed stirring to emulsify. After the emulsion was stabilized, the water bath was heated to 70°C, and the solvent cyclohexane in the emulsion was distilled off. Add 11ml of hydrazine hydrate and CuSO with a concentration of 8.0mmol / l to the above emulsion 4 1ml of the solution was used as a catalyst. Heat to 55°C, start adding 16.5ml of H 2 o 2 After 5 hours of dripping, keep warm for another two hours, pour the hydrogenated emulsion into acetone to demulsify and coagulate. The wet glue is rinsed repeatedly with distilled water until it becomes neutral, and then soaked in a solvent containing anti-aging agent 264 for 24 hours. After soaking, the wet glue is taken out and placed in a fume hood, ...

Embodiment 3

[0022] Take by weighing 100 grams of SBS solution (solid content 20%), add in the there-necked flask that stirs is housed, add the graft copolymer of 1.5 grams of SBS and hydrophilic monomer maleic anhydride, 2.0 grams of TritonX-100 wherein, 0.8 g of DBSNa, 60 ml of distilled water, stirred at high speed to emulsify. After the emulsion was stabilized, the water bath was heated to 70°C, and the solvent cyclohexane in the emulsion was distilled off. Add 10ml of hydrazine hydrate and CuSO with a concentration of 8.0mmol / l to the above emulsion 4 1ml of the solution was used as a catalyst. Heat to 60°C, start to drop 15ml of H 2 o 2 After 5 hours of dripping, keep warm for another two hours, pour the hydrogenated emulsion into acetone to demulsify and coagulate. The wet glue is rinsed repeatedly with distilled water until it becomes neutral, and then soaked in a solvent containing anti-aging agent 264 for 24 hours. After soaking, the wet glue is taken out and placed in a fume...

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PUM

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Abstract

This invention relates to a method for hydrogenating styrene-series thermoplastic elastomer with N2H4.H2O / H2O2 / catalyst system. The method comprises: (1) preparing styrene-series thermoplastic elastomer latex; (2) hydrogenating styrene-series thermoplastic elastomer latex with N2H4.H2O / H2O2 / catalyst system. The method does not need high-pressure apparatus, compressed H2, noble metal catalyst or a large amount of solvent. The product has hydrogenation degree of 85% and gel content lower than 2%. The method has such advantages as simple process, high stability, high reliability, no pollution and wide applications.

Description

technical field [0001] The invention belongs to the field of modification of thermoplastic elastomers, in particular to a 2 h 4 ·H 2 O / H 2 o 2 Process for the hydrogenation of styrenic thermoplastic elastomers with a catalyst system. Background technique [0002] Styrenic thermoplastic elastomers, including styrene-butadiene-styrene triblock copolymer (SBS) and styrene-isoprene-styrene triblock copolymer (SIS), are a class of heterophasic Polymers are also a very useful thermoplastic elastomer, but due to the presence of unsaturated bonds, they are resistant to oxygen and ozone and have poor aging properties. This deficiency can be improved by hydrogenation. Elastomer hydrogenation is an important means of elastomer modification. It prepares a series of elastomers and thermoplastic elastomers with unique structures and excellent properties. Compared with unhydrogenated polymers, hydrogenated elastomers have good oxygen resistance and heat aging resistance in addition ...

Claims

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Application Information

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IPC IPC(8): C08F8/04C08F12/08B01J31/02
Inventor 廖桂英姜胜斌谢光勇尤庆亮
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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