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Low-odour SEBS (styrene butadiene styrene block copolymer) melt-grafting maleic anhydride and preparation method thereof

A technology of maleic anhydride and melt grafting, which is applied in the field of low-odor SEBS melt grafted maleic anhydride and its preparation, can solve the problems of large residue, yellow product color, and low grafting efficiency, and achieve simple preparation process, The effect of low product odor and high grafting rate

Inactive Publication Date: 2012-01-11
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional SEBS melt-grafted maleic anhydride uses DCP as the initiator, the grafting efficiency is low, the residue is large, the color of the product is yellow, and the odor is strong
At the same time, maleic anhydride is prone to copolymerization during the grafting process, and the material is severely cross-linked.

Method used

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  • Low-odour SEBS (styrene butadiene styrene block copolymer) melt-grafting maleic anhydride and preparation method thereof
  • Low-odour SEBS (styrene butadiene styrene block copolymer) melt-grafting maleic anhydride and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] Weigh the styrene monomer as 1% by weight (the following are the weight ratio) and pour it into the container, dissolve 0.15% of BIPB in the styrene monomer, stir evenly, and then press SEBS 96.25%, maleic anhydride 1.2%, Hexamethyltriamine phosphate 0.4%, 1010 / 168 0.2 / 0.1%, EBS 0.7%, weighed, poured into a blender, slowly added the previously prepared styrene / BIPB mixed solution to the material, and stirred evenly. The mixed material is put into the hopper of the twin-screw extruder, grafted through melting reaction, extruded and granulated. Among them, the temperature settings of each heating zone of the screw are as follows: first zone temperature: 150°C; second zone: 160°C; third zone: 170°C; fourth zone: 160°C; machine head: 165°C; ~5min, the pressure is 14MPa.

Embodiment 2

[0039] Weigh the styrene monomer as 1% by weight (the following are the weight ratio) and pour it into the container, dissolve 0.15% of BIPB in the styrene monomer, stir evenly, and then press SEBS 95.65%, maleic anhydride 1.8%, Hexamethyltriamine phosphate 0.4%, 1010 / 168 0.2 / 0.1%, and other 0.7% were weighed, poured into a blender, slowly added the previously prepared styrene / BIPB mixed solution to the material, and stirred evenly. The mixed material is put into the hopper of the twin-screw extruder, grafted through melting reaction, extruded and granulated. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 150°C; zone 2: 160°C; zone 3: 170°C; zone 4: 160°C; machine head: 165°C; ~5min, the pressure is 14MPa.

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Abstract

The invention discloses low-odour SEBS (styrene butadiene styrene block copolymer) melt-grafting maleic anhydride and a preparation method thereof. The low-odour SEBS melt-grafting maleic anhydride consists of the following components in percentage by weight: 95 to 97 percent of SEBS; 0 to 0.2 percent of initiator, 1.0 to 2.0 percent of maleic anhydride, 0.8 to 1.5 percent of styrene monomer, 0.2to 0.5 percent of Hexamethylphosphoramide, 0.2 to 0.4 percent of antioxidant and 0.5 to 1 percent of other auxiliaries. The low-odour SEBS melt-grafting maleic anhydride disclosed by the invention has high grafting efficiency which reaches 85 percent and 82.8 percent, has low odour and white color and cannot influence the color of a finished product when being blended with other materials.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a low-odor SEBS melt-grafted maleic anhydride and a preparation method thereof. Background technique [0002] SEBS is a linear three-block copolymer with polystyrene as the terminal block and ethylene-butene copolymer obtained by hydrogenation of polybutadiene as the middle elastic block. SEBS does not contain unsaturated double bonds, has good low temperature resistance, weather resistance, ozone oxidation resistance, and good thermal stability. Blending with engineering plastics can greatly improve the impact strength and low temperature resistance of engineering plastics. However, the SEBS molecular chain does not contain polar or reactive groups, and has poor compatibility with polar plastics such as polyamide PA, polyester, and polyurethane TPU. In order to improve the compatibility of SEBS with these polar plastics, SEBS often needs to be modified. For the grafti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08F287/00C08K5/134C08K5/526C08K5/20B29C47/92B29C48/92
Inventor 徐东徐永周兵
Owner SHENZHEN KEJU NEW MATERIAL
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