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Synthetic method of hybrid non-isocyanate polyurethane

A non-isocyanate, synthesis method technology, applied in polyurea/polyurethane adhesives, polyurea/polyurethane coatings, adhesive types, etc., can solve the problems of long synthesis time and affecting the mechanical properties of materials, and achieve simple synthesis lines Effect

Active Publication Date: 2012-10-17
HUBEI INST OF AEROSPACE CHEMOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis time of CN 1880360 is longer, and the mixed non-isocyanate polyurethane synthesized by CN 101260232A will cause the separation of the two-phase system of polyurethane and epoxy resin, thereby affecting the mechanical properties of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 200g of epoxy resin E-44 and 1g of tetrabutylammonium bromide into the autoclave, seal the autoclave, turn on the electromagnetic stirring and stirring condensing device, raise the temperature to 80°C, and use CO 2 Gas replacement three times, continuous ventilation and CO 2 The pressure was 1.0 MPa and the reaction was carried out for 3 hours to obtain a cyclocarbonate with an epoxy group at the end. The conversion rate of epoxy group was measured to be 0.47.

[0020] Weigh 100g of the above-mentioned cyclocarbonate, 200g of 1,4-dioxane, 0.5g of triethylamine, and 12g of ethylenediamine into a 500ml four-neck flask, stir and react at room temperature for 9 hours to prepare a hybrid non-isocyanate polyurethane solution, the solution is Pale yellow transparent liquid.

[0021] The above solution was poured into a polytetrafluoroethylene mold, and the solvent was removed in vacuum, then placed at room temperature for 24 hours, and placed in an oven at 50°C for 48 ho...

Embodiment 2

[0024] Add 200g of epoxy resin E-44 and 1g of tetrabutylammonium bromide into the autoclave, seal the autoclave, turn on the electromagnetic stirring and stirring condensing device, raise the temperature to 100°C, and use CO 2 Gas replacement three times, continuous ventilation and CO 2 The pressure was 0.5 MPa and the reaction was carried out for 3 hours to obtain a cyclocarbonate with an epoxy group at the end. The conversion rate of epoxy group was measured to be 0.48.

[0025] Weigh 100g of the above cyclocarbonate, 200g of tetrahydrofuran, 0.5g of triethylamine, and 23.2g of 1,6-hexamethylenediamine into a 500ml four-neck flask, stir and react at room temperature for 6 hours to prepare a hybrid non-isocyanate polyurethane solution, the solution is light yellow Transparent liquid.

[0026] Pour the above solution into a mold, remove the solvent in vacuum, place at room temperature for 24 hours, and place in an oven at 50°C for 48 hours to prepare a hybrid non-isocyanate ...

Embodiment 3

[0029] Add 300g of epoxy resin E-44, 1.5g of tetrabutylammonium chloride, and 0.03g of potassium bromide into the autoclave, seal the autoclave, open the electromagnetic stirring and stirring condensing device, raise the temperature to 100°C, and use CO 2 Gas replacement three times, continuous ventilation and CO 2 The pressure was 2.0 MPa and the reaction was carried out for 1 hour to obtain a cyclocarbonate with an epoxy group at the end. The conversion rate of epoxy group was measured to be 0.46.

[0030] Weigh 100g of the above-mentioned cyclocarbonate, 200g of N,N-dimethylformamide, and 17.4g of 1,6-hexamethylenediamine into a 500ml four-neck flask, and stir and react at 60°C for 2 hours to prepare a hybrid non-isocyanate polyurethane solution. The solution is Pale yellow transparent liquid.

[0031] After removing the solvent, the above solution was poured into a polytetrafluoroethylene mold, placed at room temperature for 24 hours, and placed in an oven at 50°C for 48...

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Abstract

The invention discloses a synthetic method of hybrid non-isocyanate polyurethane, comprising the following steps: adding epoxy resin and catalyst in a high pressure reaction vessel, sealing the high pressure reaction vessel, and opening to stir, heating up to 60-150 DEG C under continuously stirring, continuously introducing air to keep the CO2 pressure at 0.5-2 MPa, reacting for 1-4 h to generate epoxy-terminated cyclic carbonate, then reacting the epoxy-terminated cyclic carbonate with amine in the presence of a solvent at 30-60 DEG C for 2-10 h to obtain a hybrid non-isocyanate polyurethane solution, wherein the additional amount of the catalyst is 0.1-2 wt% of that of the epoxy resin; pouring the non-isocyanate polyurethane solution in a mold, and removing the solvent to obtain a non-isocyanate polyurethane solution film. The synthetic method of the invention has the advantages of environmental protection and simpleness, and the synthetic product has excellent performances of epoxy resin and polyurethane simultaneously, and has excellent caking property, acid and alkali corrosion resistance, solvent resistance, mechanical strength and other physical properties.

Description

technical field [0001] The invention belongs to the field of a synthesis method of a high polymer. It specifically relates to a method for synthesizing hybrid non-isocyanate polyurethane. Background technique [0002] Traditional polyurethane is generally a polymer compound formed by the reaction of organic diisocyanate or polyisocyanate with dihydroxy or polyhydroxy compounds. It is famous for its excellent performance, various forms, and simple molding and processing. Using polyurethane resin, people can make foam plastics, elastomers, coatings, adhesives, fibers, synthetic leather, waterproof materials and paving materials and other products, which are widely used in transportation, construction, machinery, electronic equipment, furniture, food processing , clothing, textiles, synthetic leather, printing, minerals, petrochemicals, water conservancy, national defense, sports, medical equipment and other fields. [0003] However, there are some problems in the process of ...

Claims

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Application Information

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IPC IPC(8): C08G71/04C09D175/04C09J175/04
Inventor 王芳阮家声张宏远
Owner HUBEI INST OF AEROSPACE CHEMOTECH
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