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Rigid closed-cell foam material of chitosan composite polyurethane and preparation method thereof

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

Inactive Publication Date: 2012-02-15
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Rigid closed-cell foam material of chitosan composite polyurethane and preparation method thereof
  • Rigid closed-cell foam material of chitosan composite polyurethane and preparation method thereof
  • Rigid closed-cell foam material of chitosan composite polyurethane and preparation method thereof

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Embodiment Construction

[0025] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0026] In the first step, polyether polyol and polymethylene polyphenylisocyanate were vacuum-dried at 40°C for 8 hours, chitosan powder was vacuum-dried at 110°C for 8 hours, and placed at room temperature for use. Then chitosan powder was added into polymethylene polyphenylisocyanate, and mechanically stirred for 2 hours to obtain component A.

[0027] In the second step, according to the formula of the embodiment shown in Table 1, take the polyether polyol, in the polyether polyol, add water, flame retardant, catalyst, foam stabilizer according to the formula, fully stir with a mechanical stirring device, Mix e...

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Abstract

A rigid closed-cell foam material of chitosan composite polyurethane in the technical field of polyurethane materials and a preparation method thereof. Its components and contents in parts by weight are: polyether polyol 100, polymethylene polyphenyl isocyanate 140-160, physical foaming agent, water 0-3, flame retardant 10-15, catalyst 1-4, foam Stabilizer 1.5~10, Chitosan powder 5~20. Preparation method: dry the polyether polyol, polymethylene polyphenyl isocyanate and chitosan powder, and place it at room temperature for use; then add the chitosan powder to the polymethylene polyphenyl isocyanate, and use a mechanical Stirring for 2 hours to obtain component A; performing mixing treatment to obtain component B, and then performing polymerization and foaming treatment to obtain a casting mold blank, and after demoulding, the casting mold blank is subjected to aging treatment to obtain a foamed material. The foam material prepared by the invention has biocompatibility and degradability, and the invention ensures that the properties of the material are equivalent to those of the polyurethane foam material without 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 rigid polyurethane foam materials are porosity, low density, and high specific strength. It has been widely used in construction, transportation, refrigerator 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 pollution to the environment. pollute. In addition, human beings are facing the severe reality of the depletion of petroleum res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G101/00C08J9/14C08G18/48C08G18/64C08K5/521
Inventor 张子男张飞张洪斌
Owner SHANGHAI JIAOTONG UNIV