Fluorine and silicon-containing polyurethane prepolymer-modified epoxy resin and preparation method thereof

A polyurethane prepolymer and epoxy resin technology, which is applied in the field of resin composite materials, can solve the problems of poor toughening effect, reduced cross-linking degree, restriction of chain segment movement, etc., and achieves good toughening effect and good thermal stability. , the effect of improving toughness

Inactive Publication Date: 2017-05-31
SUZHOU DEJIE MEMBRANE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method uses polyurethane grafting to modify the epoxy resin, but the above polyurethane modified epoxy resin has the following problems: the diluent used contains volatile organic solvents and is highly toxic; the polyurethane long chain is used to combine with epoxy resin When the resin is grafted and modified, because the long-chain molecules are prone to entanglement, the distance between molecules is reduced, the movement of chain segments is restricted, and the toughening effect is deteriorated; at the same time, the cross-linking reaction between epoxy resins is hindered, resulting in cross-linking The joint degree is reduced, and the strength is also reduced

Method used

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  • Fluorine and silicon-containing polyurethane prepolymer-modified epoxy resin and preparation method thereof
  • Fluorine and silicon-containing polyurethane prepolymer-modified epoxy resin and preparation method thereof
  • Fluorine and silicon-containing polyurethane prepolymer-modified epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add 80g D to a 500ml four-neck flask 3 F, 0.8g ethylenediamine, 0.4g H 2 O, at 60°C, turn on the nitrogen protection and stir for 10 hours, then raise the temperature to 100°C, and vacuumize for 1 hour to remove moisture and ethylenediamine. Heat and gradually add 29.6g of SCA-603 dropwise, keep the temperature at 60°C, and continue to react for 4 hours. After the reaction is completed, raise the temperature to 120°C, and vacuum for 2 hours;

[0031] (2) Take 22.2g of isoflurane diketone diisocyanate and add it to a four-necked flask, add 50g of polyoxypropylene diol with a molecular weight of 1000 drop by drop, raise the temperature to 75°C, add a drop of catalyst dibutyltin dilaurate, pass through N 2 , reacted for 3 hours; lowered the temperature to 40°C, added dropwise 1.332g of aminofluorosilicone oil in step (1), raised the temperature to 75°C, reacted for 80min, and stopped the reaction to obtain a fluorine-containing silicon polyurethane prepolymer.

[003...

Embodiment 2

[0042] (1) Add 40g D to a 500ml four-neck flask 3 F, 0.4g ethylenediamine, a drop of H 2 O, at 60°C, turn on the nitrogen protection and stir for 10 hours, then raise the temperature to 100°C, and vacuumize for 1 hour to remove moisture and ethylenediamine. Heat and gradually add 14.8g of SCA-603 dropwise, keep the temperature at 60°C, and continue to react for 4 hours. After the reaction is completed, raise the temperature to 120°C, and vacuum for 2 hours;

[0043] (2) Take 22.2g of isoflurane diketone diisocyanate and add it to a four-necked flask, add 55g of polyoxypropylene diol with a molecular weight of 1100 drop by drop, raise the temperature to 75°C, add a drop of catalyst dibutyltin dilaurate, and pass in N 2 , reacted for 3 hours; lowered the temperature to 40°C, added dropwise 1.332g of aminofluorosilicone oil in step (1), raised the temperature to 75°C, reacted for 80min, and stopped the reaction to obtain a fluorine-containing silicon polyurethane prepolymer.

...

Embodiment 3

[0047] (1) Add 80g D to a 500ml four-neck flask 3 F, 0.8g ethylenediamine, 0.4g H 2 O, at 60°C, turn on the nitrogen protection and stir for 10 hours, then raise the temperature to 100°C, and vacuumize for 1 hour to remove moisture and ethylenediamine. Heat and gradually add 29.6g of SCA-602 dropwise, keep the temperature at 60°C, and continue to react for 4 hours. After the reaction is completed, raise the temperature to 120°C, and vacuum for 2 hours;

[0048] (2) Take 22.2g of isoflurane diketone diisocyanate and add it to a four-necked flask, add 50g of polyoxypropylene diol with a molecular weight of 1000 drop by drop, raise the temperature to 75°C, add a drop of catalyst dibutyltin dilaurate, pass through N 2 , reacted for 3 hours; lowered the temperature to 40°C, added dropwise 1.332g of aminofluorosilicone oil in step (1), raised the temperature to 75°C, reacted for 80min, and stopped the reaction to obtain a fluorine-containing silicon polyurethane prepolymer.

[004...

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PUM

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Abstract

The invention discloses a fluorine and silicon-containing polyurethane prepolymer-modified epoxy resin and a preparation method thereof. The preparation method comprises the following steps: firstly synthesizing an amino fluorosilicone oil-modified polyurethane prepolymer; and modifying the epoxy resin by using the polyurethane prepolymer. The epoxy resin has relatively good tensile strength and also has good heat stability, and the toughness is greatly improved. The invention provides the preparation method of the fluorine and silicon-containing polyurethane prepolymer-modified epoxy resin. By adopting a simple solution reaction, the preparation process is simple and the method is easy to popularize and apply.

Description

technical field [0001] The invention relates to a modified epoxy resin composite material, in particular to an epoxy resin composite material modified by a fluorine-containing silicon polyurethane prepolymer and a preparation method thereof, belonging to the technical field of resin composite materials. Background technique [0002] Most epoxy resins are liquid at room temperature and are thermoplastic linear polymers. Under normal temperature or heating conditions, epoxy resin oligomers react with curing agents to form insoluble and infusible three-dimensional network polymer plastics. , At the same time, there are its unique epoxy groups in the epoxy resin, as well as active groups such as hydroxyl groups and ether bonds. This allows epoxy resins to exhibit their inherently good properties. Such as excellent mechanical properties, chemical resistance, adhesive properties, good wear resistance, electrical insulation properties, while curing does not release low molecular s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/58C08G18/48C08G18/61C08G18/32C08G18/75C08G18/12C08G18/66
CPCC08G18/58C08G18/12C08G18/3234C08G18/4045C08G18/4825C08G18/61C08G18/6685C08G18/755C08G18/6529
Inventor 金浴雅谢洪德吴越文
Owner SUZHOU DEJIE MEMBRANE MATERIAL SCI & TECH
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