Preparation method of full-bio-based non-isocyanate polyurethane capable of being recycled and reprocessed

A non-isocyanate, all-biological technology, applied in the field of bio-based polymer materials, can solve problems such as unfavorable sustainable development, and achieve the effect of good mechanical properties and thermal stability

Active Publication Date: 2021-06-18
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are reports in the prior art on the use of oils to prepare non-isocyanate polyurethanes, only part of the bio-based raw materials are used. With the depletion of petrochemical resources in recent years, there are still certain limitations, which is not conducive to sustainable development. The development and utilization of bio-based polymer materials have received more and more attention

Method used

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  • Preparation method of full-bio-based non-isocyanate polyurethane capable of being recycled and reprocessed
  • Preparation method of full-bio-based non-isocyanate polyurethane capable of being recycled and reprocessed
  • Preparation method of full-bio-based non-isocyanate polyurethane capable of being recycled and reprocessed

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Epoxidized soybean oil (95g, 97.4mmol) was added to the pressure reactor, and tetrabutylammonium iodide (6.325g) was added as a catalyst, then carbon dioxide was introduced into the pressure reactor, and it was evacuated after staying for 2min. Repeat three times to exhaust the air in the reactor, and finally maintain the pressure at 2MPa, control the reaction temperature at 80°C, stir and react for 12 hours to obtain soybean oil-based cyclocarbonate; soybean oil-based cyclocarbonate (6g) was derivatized with pinene The compound 1,8-menthanediamine (1.661g) was stirred and mixed at room temperature, poured into a polytetrafluoroethylene mold, and cured in an oven at 150°C for 48 hours to obtain a fully bio-based non-isocyanate polyurethane.

[0032] Such as figure 1 As shown, the epoxy group in epoxidized soybean oil is at 822cm -1 The characteristic absorption peak at disappears, and 1797cm in soybean oil base cyclocarbonate -1 The appearance of a new absorption peak...

Embodiment 2

[0034] Epoxy tung oil (50g) is joined in the pressure reactor, add tetrabutylammonium iodide (3g) and L-ascorbic acid (0.8g) as catalyst, then pass into carbon dioxide in the reactor, evacuate after staying 1min, After this process was repeated three times, carbon dioxide was introduced again, and the pressure was maintained at 0.35 MPa, and the reaction temperature was controlled at 80° C., stirred, and after 8 hours of reaction, soybean oil-based cyclocarbonate was obtained; tung oil cyclocarbonate (6 g) was mixed with 1,8 - Menthane diamine (1.6 g) was stirred and mixed at room temperature, poured into a polytetrafluoroethylene mold, and cured in an oven at 140° C. for 36 hours to obtain a fully bio-based non-isocyanate polyurethane. The obtained non-isocyanate polyurethane has a tensile strength of 23.75MPa. At the same time, the broken sample can be remolded after hot pressing at 150°C for 4 hours at a pressure of 3MPa, and the tensile strength after remolding is 22.8MPa. ...

Embodiment 3

[0036] Epoxidized soybean oil (60g) is joined in the pressure reactor, add tetrabutyl ammonium bromide (3.8g) and L-ascorbic acid (1.1g) as catalyst, then pass into carbon dioxide in the pressure reactor, stay after 3min Empty, repeat this process three times to exhaust the air in the reactor, and finally maintain the pressure at 1.4MPa, control the reaction temperature at 80°C, stir, and obtain soybean oil-based cyclocarbonate after reacting for 8 hours; soybean oil-based cyclocarbonate (3g) and castor oil derivative decanediamine (1.65g) were stirred and mixed at room temperature, poured into a polytetrafluoroethylene mold, and cured in an oven at 150° C. for 48 hours to obtain a fully bio-based non-isocyanate polyurethane. The obtained non-isocyanate polyurethane has a tensile strength of 21.35MPa. At the same time, the broken sample can be reshaped after hot pressing at 150°C for 4 hours at a pressure of 3MPa. The tensile strength after remolding is 20.68MPa.

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Abstract

The invention discloses a preparation method of full-bio-based non-isocyanate polyurethane capable of being recycled and reprocessed. The non-isocyanate polyurethane is obtained by carrying out curing reaction on grease-based cyclic carbonate and bio-based amine containing a rigid structure, and a catalyst and high-toxicity isocyanate are not needed in the reaction process. The prepared material has excellent properties of self-repairing, recycling and reprocessing, high biocompatibility, high mechanical strength and the like. The problem that existing polyurethane uses high-toxicity isocyanate is effectively solved, a bio-based raw material is used for replacing a petrochemical product, the green sustainability of the material is further improved, the recycling and reprocessing capacity enables the damaged material to be reused, and therefore more excellent economic benefits are achieved; the material has a wide development prospect in replacing the existing polyurethane material.

Description

technical field [0001] The invention relates to a preparation method of a recyclable and renewable all-bio-based non-isocyanate polyurethane, which belongs to the technical field of bio-based polymer materials. Background technique [0002] Polyurethane materials have superior performance and can be widely used in construction, aviation industry, shoe industry, automobile and medical industries as coatings, adhesives, foams, elastomers, etc. It is a class of polymers with great development prospects in recent years. Material. Traditional polyurethane materials are mostly obtained by the reaction of isocyanate and polyol. However, isocyanate is highly toxic, and the phosgene used in the preparation process is also highly toxic and can be fatal, so its preparation and use will cause great danger to human health and the environment. With the promotion of "green chemistry", the use of non-toxic and highly biocompatible biomass raw materials to prepare polyurethane has become a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G71/04C08J11/24C08L75/04
CPCC08G71/04C08J11/24C08J2375/04Y02W30/62
Inventor 刘鹤杨欣欣刘秀秀商士斌宋湛谦
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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