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Chitosan-polyurethane composite rigid closed-cell foam material and preparation method thereof

A technology of composite polyurethane and closed-cell foam, which is applied in the field of rigid closed-cell foam of chitosan composite polyurethane and its preparation

Inactive Publication Date: 2010-07-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, there is no report on the application of chitosan in the preparation of polyurethane rigid closed-cell materials.

Method used

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  • Chitosan-polyurethane composite rigid closed-cell foam material and preparation method thereof
  • Chitosan-polyurethane composite rigid closed-cell foam material and preparation method thereof
  • Chitosan-polyurethane composite rigid closed-cell foam material and preparation method thereof

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Embodiment Construction

[0025] The embodiments of the present invention will be described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention. Detailed implementation modes and specific operation procedures are given, but the protection scope of the present invention is not limited to the following implementations. example.

[0026] In the first step, the polyether polyol and polymethylene polyphenyl isocyanate are vacuum dried at 40°C for 8 hours, and the chitosan powder is vacuum dried at 110°C for 8 hours, and placed at room temperature for later use. Then, the chitosan powder was added to polymethylene polyphenyl isocyanate, and mechanical stirring was used for 2 hours to obtain component A.

[0027] In the second step, weigh the polyether polyol according to the formula of the embodiment shown in Table 1. In the polyether polyol, add water, flame retardant, catalyst, and foam stabilizer according to the formula, and stir fully with a mecha...

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Abstract

The invention provides a chitosan-polyurethane composite rigid closed-cell foam material and a preparation method thereof, which belong to the technical field of polyurethane materials. The material comprises the following components in part by weight: 100 parts of polyether glycol, 140 to 160 parts of polymethylene polyphenyl isocyanate, 0 to 3 parts of physical foaming agent and water, 10 to 15 parts of flame retardant, 1 to 4 parts of catalyst, 1.5 to 10 parts of foam stabilizer and 5 to 20 parts of chitosan powder. The preparation method comprises the following steps: drying polyether glycol, polymethylene polyphenyl isocyanate and chitosan powder; placing the obtained product to room temperature for later use; adding chitosan powder into polymethylene polyphenyl isocyanate and mechanically stirring the two for 2 hours to obtain a component A; performing mixing treatment to obtain a component B; performing polymerization and polymerization treatment to obtain a pouring die billet; curing the pouring die billet after die release to obtain a foamed material. The foam material prepared by the method has the advantages of biocompatibility and degradability, and the preparation method ensures that every property of the material is equivalent to that of polyurethane foam materials containing no chitosan.

Description

Technical field [0001] The invention relates to a foam material in the technical field of polyurethane materials and a preparation method thereof, in particular to a rigid closed-cell foam material of chitosan composite polyurethane and a preparation method thereof. Background technique [0002] The main characteristics of polyurethane rigid foam materials are porosity, low density, and high specific strength. They have been widely used in construction, transportation, refrigerators and freezers, petrochemical pipelines and aviation. However, the main raw materials for the production of polyurethane rigid foam materials are synthetic polymers based on petroleum resources. During the production process, toxic by-products will be produced, which will pollute the environment, and the discarded products are difficult to biodegrade, which will cause secondary damage to the environment. Pollution. In addition, human beings are faced with the severe reality of depletion of petroleum re...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/64C08G18/48C08K5/521C08J9/14C08G101/00
Inventor 张子男张飞张洪斌
Owner SHANGHAI JIAO TONG UNIV
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