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Polylactic acid polyurethane material and preparation method thereof

A technology of polyurethane material and polylactic acid, applied in the field of polyurethane foaming, can solve the problems of high rigidity, poor toughness and limited application prospect of pure polylactic acid, and achieve the effect of simple and easy preparation method and good biocompatibility.

Pending Publication Date: 2020-12-01
ZIBO ZHENGDA ENERGY SAVING NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high rigidity and poor toughness of pure polylactic acid, it is hard and brittle at room temperature, which greatly limits its application prospects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Take 50 parts of polyether polyol DX-1 (functionality 2, molecular weight 1000), and 50 parts of polyether polyol DX-2 (functionality 3, molecular weight 2000) into a three-necked flask, and heat up under nitrogen protection to 110°C, dehydrate until the water content is less than 0.02%, lower the temperature to 80°C, add 38 parts of TDI dropwise under the protection of nitrogen, and stir for 2 hours to obtain component A.

[0033] (2) Take 20 parts of 20-mesh polylactic acid, 25 parts of 1,4-butanediol, and 10 parts of vinyltriethoxysilane, stir and mix evenly at 50°C to obtain component B.

[0034] (3) Mix component A and component B at a mass ratio of 3:1, stir under nitrogen protection, the stirring temperature is 120°C, and the stirring time is 3 hours to obtain the product.

Embodiment 2

[0040] (1) Take 150 parts of polyether polyol DX-1 (functionality 2, molecular weight 6000) and 50 parts of polyether polyol DX-2 (functionality 3, molecular weight 8000) into a three-necked flask, and heat up under nitrogen protection to 110°C, dehydrate until the water content is less than 0.02%, lower the temperature to 90°C, add 30 parts of TDI dropwise under the protection of nitrogen, stir and react for 2.5 hours to obtain component A.

[0041] (2) Take 50 parts of 80-mesh polylactic acid, 55 parts of trimethylolpropane, and 15 parts of vinyltrimethoxysilane, stir and mix evenly at 50°C to obtain component B.

[0042] (3) Mix component A and component B at a mass ratio of 2:1, stir under nitrogen protection, the stirring temperature is 140°C, and the stirring time is 4h to obtain the product.

Embodiment 3

[0048] (1) Take 200 parts of polyether polyol DX-1 (functionality 2, molecular weight 10000), and 100 parts of polyether polyol DX-2 (functionality 3, molecular weight 5000) into a three-necked flask, and heat up under nitrogen protection to 110°C, dehydrate until the water content is less than 0.02%, lower the temperature to 100°C, add 42 parts of TDI dropwise under the protection of nitrogen, stir and react for 3 hours to obtain component A.

[0049] (2) Take 100 parts of 100-mesh polylactic acid, 25 parts of triethanolamine, and 35 parts of vinyltris(β-methoxyethoxy)silane, stir and mix at 50°C to obtain component B.

[0050] (3) Mix component A and component B at a mass ratio of 3:1, stir under nitrogen protection, the stirring temperature is 160°C, and the stirring time is 5 hours to obtain the product.

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PUM

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Abstract

The invention belongs to the field of polyurethane foaming, and particularly relates to a polylactic acid polyurethane material and a preparation method thereof. The polylactic acid polyurethane material is prepared from a component A and a component B. The component A comprises the following raw materials in parts by weight: 50-200 parts of polyether polyol 1, 50-200 parts of polyether polyol 2 and 10-100 parts of TDI, wherein the functionality of the polyether polyol 1 is 2, and the molecular weight of the polyether polyol 1 is 1000-12000; and the functionality of the polyether polyol 2 is 3, and the molecular weight of the polyether polyol 2 is 1000-12000. The component B comprises the following raw materials in parts by weight: 20-200 parts of polylactic acid, 20-200 parts of a chain extender and 10-50 parts of a silane coupling agent. The prepared polylactic acid polyurethane material is good in biocompatibility, friendly to environment, resistant to bacteria and biodegradable, and the preparation method is simple in process.

Description

technical field [0001] The invention belongs to the field of polyurethane foaming, and in particular relates to a polylactic acid polyurethane material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a polymer material obtained from renewable resources. It has the advantages of high strength, good transparency, good biocompatibility and biodegradability. It has a wide range of uses in the polymer field and is widely used in the field of biomedical materials. [0003] However, due to the high rigidity and poor toughness of pure polylactic acid, it is hard and brittle at room temperature, which greatly limits its application prospects. The invention embeds polylactic acid into the flexible polyurethane product, greatly expands the application performance of the polyurethane, makes it have better biodegradability, bacteria resistance and biocompatibility, and is an environment-friendly product. Contents of the invention [0004] The ...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32C08G18/12
CPCC08G18/12C08G18/3206C08G18/3281C08G18/4018C08G18/428C08G18/4812C08G18/6607C08G18/6611C08G18/6622C08G18/7614C08G18/664C08G18/6644C08G18/6655
Inventor 荣若贵耿佃勇荆晓东孙言丛
Owner ZIBO ZHENGDA ENERGY SAVING NEW MATERIAL
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