Epoxy chain extender and preparation method thereof

A technology of epoxy chain extender and organic solvent, which is applied in the field of epoxy chain extender and its preparation, can solve the problem of affecting the promotion and application of recycled biodegradable polymer materials, and is not suitable for the environment-friendly characteristics of biodegradable polymer materials. , the thermal stability and poor mechanical properties of biodegradable materials, etc., to achieve the effect of wide source of raw materials and reagents, improved performance and large molecular weight

Active Publication Date: 2014-11-19
贵州一当科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biodegradable polymer materials are a class of environmentally friendly materials, but most biodegradable materials have poor thermal stability and mechanical properties, and their thermal stability and mechanical properties can be improved by chain extension reactions
At present, commercially available chain extenders include oxazolines, epoxy resins, isocyanates, anhydrides and other organic compounds with small molecular weights, which will cause the mechanical properties of the polymer to decline after being added; It will migrate to the surface of the product and cause harm to the environment. It is not suitable for the environmental friendliness of biodegradable polymer materials
The above characteristics have seriously affected the recycling of domestic polyester and polyamide engineering plastics and the promotion and application of biodegradable polymer materials

Method used

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  • Epoxy chain extender and preparation method thereof

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Effect test

Embodiment 1

[0011] Embodiment 1 of the present invention: the preparation of epoxy chain extender, in the 200ml there-necked bottle with magnetic stirrer, add the benzene of 60ml, 25gγ-carotene and 9.8g maleic anhydride, heat to 140 ℃, in D-A reaction occurred under the protection of nitrogen for 4 hours; add 93g epichlorohydrin and 0.7g ammonium bromide to the mixture, heat and reflux for 6 hours; after cooling to 73°C, add excess sodium hydroxide; filter, wash repeatedly with distilled water, pump Filter to obtain 36.75 g of light yellow multi-epoxide functional group chain extender.

Embodiment 2

[0012] Embodiment 2 of the present invention: preparation of epoxy chain extender, add 60ml of toluene, 22g gamma-carotene and 9g maleic anhydride to a 200ml there-necked flask with a magnetic stirrer, heat to 170°C, D-A reaction occurred under protection for 3 hours; add 90g epichlorohydrin and 0.6g ammonium bromide to the mixture, heat and reflux for 5 hours; after cooling to 75°C, add excess sodium hydroxide; filter, wash repeatedly with distilled water, and suction filter 29.82 g of a white polyepoxide functional chain extender was obtained.

Embodiment 3

[0013] Embodiment 3 of the present invention: preparation of epoxy chain extender, add 60ml of acetonitrile, 27g γ-carotene and 11g maleic anhydride to a 200ml there-necked flask with a magnetic stirrer, heat to 130°C, D-A reaction occurred under protection for 5 hours; add 90g epichlorohydrin and 0.6g ammonium bromide to the mixture, heat and reflux for 4 hours; after cooling to 75°C, add excess sodium hydroxide; filter, wash repeatedly with distilled water, and suction filter 33.92 g of a white polyepoxide-functional chain extender were obtained.

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Abstract

The invention discloses an epoxy chain extender and a preparation method thereof. The method includes following steps: on the basis of weight part, adding 22-27 parts of [gamma]-carotene and 9-11 parts of cis-butadiene anhydride to an organic solvent with a material liquid ratio being 31:60-38:60 g / ml; performing a mixing process fully and uniformly; carrying out a D-A reaction at 130-170 DEG C for 3-5 hours with protection of nitrogen; adding 90-95 parts of epichlorohydrin and 0.6-0.8 parts of ammonium bromide to a mixture after the reaction; performing a heating reflux process for 5-7 hours; performing a cooling process to 65-75 DEG C; and adding excessive amounts of sodium hydroxide to obtain a finished product. The epoxy chain extender can be applied in recycle of polyester-type and polyamide-type engineering plastics and performance improvement of biodegradable polymer materials. The method is wide in sources of raw materials and reagents, is low in cost, is mild in reaction conditions, is simple in separation and purification and is especially suitable for large-scale industrial production. By means of the method, the chain extender, which is high in purity, long in molecular chain, large in molecular weight and multiple in epoxy functional groups, can be prepared in high efficiency and yield. The epoxy chain extender is large in molecular weight, is high in molecular chain length, is rich in epoxy functional groups, is easy to subject to a chain-extension reaction, is not reacted with water and is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to an epoxy chain extender and a preparation method thereof. Background technique [0002] In recent years, polyester, polyamide engineering plastics, and biodegradable polymer materials have been widely used in daily life. Due to the low melt viscosity of polyester and polyamide engineering plastics, it is necessary to increase the melt viscosity in order to improve the processing performance. In addition, due to repeated processing and long-term use of polyester and polyamide engineering plastics, the molecular weight has decreased due to degradation. When recycling, the mechanical properties decrease and the viscosity is lower. It is an effective method to measure the melt viscosity of ester and polyamide, and the mechanical properties of products. Biodegradable polymer materials are a kind of environmentally friendly materials, but most biodegradable materials have p...

Claims

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Application Information

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IPC IPC(8): C08F236/22C08F222/06C08F234/02C08G63/91C08G69/48C08L101/16
Inventor 王市伟魏喜苹庄永兵
Owner 贵州一当科技有限公司
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