Preparation method of natural macromolecular modified thermoplastic polyurethane elastomer

A technology of thermoplastic polyurethane and polyurethane prepolymer, which is applied in the field of preparation of natural macromolecular modified thermoplastic polyurethane (TPU), can solve the problems of natural macromolecular mechanical properties, insufficient molding and processing performance of biological aging resistance, and achieve good biological compatibility effect

Inactive Publication Date: 2013-02-06
奥斯汀新材料(张家港)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties, biological aging resistance and molding processability of natural macromolecules are obviously insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 500g of a mixture of polycaprolactone diol and polyethylene glycol with a mass ratio of 1:1 to a 2L three-necked bottle. One bottle is equipped with a condenser and thermometer, and the other bottle is equipped with mechanical stirring, stirring rod and glass stirring sleeve. The pipes are connected with vacuum rubber pipes and coated with vacuum silicone grease for lubrication and sealing. Then they are placed in an electric heating mantle at 50~120℃ and stirred until the reactants are completely melted. As the polyol component, vacuumize into the three-necked flask The pressure is 0.01~0.1MPa, after 3h, nitrogen is filled, keeping the pressure at 10~40Pa, 1.5g tin dioctanoate is added dropwise, 556g toluene diisocyanate is added, and the reaction is at 90℃ for 2h to obtain polyurethane prepolymer.

[0023] Then, 1173 g of chitosan was added to the polyurethane prepolymer, stirred to dissolve it, and a mixed solution of polyurethane prepolymer and chitosan was obtained...

Embodiment 2

[0027] Add 500g of a mixture of polycaprolactone diol and polyethylene glycol with a mass ratio of 0.9:1 into a 2L three-necked bottle, one bottle with a condenser and thermometer, and another bottle with mechanical stirring, stirring rod and glass stirring sleeve The pipes are connected with vacuum rubber pipes and coated with vacuum silicone grease for lubrication and sealing. Then they are placed in an electric heating mantle at 50~120℃ and stirred until the reactants are completely melted. As the polyol component, vacuumize into the three-necked flask The pressure is 0.01~0.1MPa, nitrogen is charged after 3h, the pressure is 10~40Pa, 2g methyl titanate is added dropwise, 500g isophorone diisocyanate is added, and the reaction is at 90℃ for 2h to obtain polyurethane prepolymer.

[0028] Afterwards, 1111 g of hyaluronic acid was added to the polyurethane prepolymer, stirred to dissolve it, and a mixed solution of the polyurethane prepolymer and hyaluronic acid was obtained.

[00...

Embodiment 3

[0032] Add 500g of a mixture of polycaprolactone glycol and polyethylene glycol with a mass ratio of 1.1:1 to a 2L three-necked bottle, one bottle with a condenser and thermometer, and another bottle with mechanical stirring, stirring rod and glass stirring sleeve The pipes are connected with vacuum rubber pipes and coated with vacuum silicone grease for lubrication and sealing. Then they are placed in an electric heating mantle at 50~120℃ and stirred until the reactants are completely melted. As a polyol component, vacuum 0.01~0.1MPa After 3h, fill the mouth of one of the bottles to maintain 10-40Pa nitrogen protection, add 0.954g ethyl titanate dropwise, add 454g hexamethylene diisocyanate, and react at 90℃ for 2h to obtain polyurethane prepolymer.

[0033] Then, 1060 g of cellulose was added to the prepolymer, stirred to dissolve it, and a mixed solution of polyurethane elastomer and cellulose was obtained.

[0034] Under the protection of nitrogen, heat the above product to 60~...

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PUM

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Abstract

The invention discloses a preparation method of natural macromolecular modified thermoplastic polyurethane elastomer. The preparation method comprises the following steps of: (1) heating polycaprolactone glycol and polyethylene glycol in a proportion to react, dropwise adding a titanate or organic tin catalyst under a nitrogen environment, then adding diisocyanate and heating to react so as to obtain polyurethane prepolymer; (2) adding a natural macromolecular substance, stirring and dissolving; (3) heating under protection of nitrogen, dropwise adding a divalent alcohol chain extender and preserving heat for a period of time; and (4) adjusting temperature, then taking the substance in the reactor out, and drying in a vacuum drying box to obtain the natural macromolecular modified thermoplastic polyurethane elastomer. According to the preparation method, fully biodegradable polymer is used as a polybasic alcohol component of polyurethane and reacts with the diisocyanate to synthesize non-toxic, safe, biologically absorbable and biodegradable polyurethane elastomer; and the polyurethane elastomer is mixed with biomacromolecules, so that better biocompatibility is realized.

Description

Technical field [0001] The invention relates to a preparation method of a thermoplastic polyurethane elastomer, in particular to a preparation method of a natural macromolecule modified thermoplastic polyurethane (TPU). Background technique [0002] Polyurethane (PU) elastomer is a kind of polymer material with comprehensive properties, good wear resistance, wide range of hardness, high strength and elongation, large load supporting capacity, good shock absorption effect, excellent oil resistance, and biocompatibility , Biodegradability and molding processing performance is good, performance is controllable, non-toxic, no "three effects", so polyurethane elastomer ranks first in the current synthetic materials, except for a large number of use in wear resistance, oil resistance, shock absorption and high load capacity In addition to the above, it is also widely used in medical materials such as artificial hearts and artificial heart assist devices, artificial blood vessels, artif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/64C08G18/42C08G18/48C08G18/32C08G18/12
Inventor 李敏超承黎明赵艳琼孙亚飞杨廷廷艾玲李长顺
Owner 奥斯汀新材料(张家港)有限公司
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