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Super-biphobic block polyether type polyurethane copolymer and preparation process and use thereof

A technology of block polyether and copolymer, applied in the field of preparation of the above-mentioned copolymer, can solve the problems of large reactivity, rarely seen application reports, and difficulty in controlling the distribution of fluorocarbon groups, and achieves strong hydrophobicity, The effect of broad application prospects and excellent anticoagulant properties

Inactive Publication Date: 2004-06-09
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this grafting method is difficult to control the distribution of fluorocarbon groups on the surface, and its reactivity is greatly affected by the matrix.
[0009] Most of the fluorine-containing polyurethanes are synthesized from fluorinated polyether or fluorinated diisocyanate as raw materials. This product contains fluorocarbon groups in the main chain of the molecular structure, which is restricted by the main chain of the molecule and stronger hydrogen bonds. It is difficult to enter the surface, so its hydrophobic effect is limited. More importantly, this polyurethane has poor solubility, so it is rarely reported in the medical field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 4.0 grams of polyethylene glycol (PEO) with an average molecular weight of 2000 and 1.0 grams of fluoroalcohol CF (CF 2 ) 7 CH 2 CH 2 OH, preheated at 120°C for 1 hour, added to the reaction kettle under the protection of argon, and cooled to 60°C. Add 1.0 g of diphenylmethyl diisocyanate (MDI) (prepared as a 10% N,N-dimethylformamide (DMF) solution), and stir at 80° C. for 2 hours. At 20°C, add 3 grams of tetrahydrofuran-propylene oxide binary copolyether diol (average molecular weight: 2000) dropwise with a concentration of 0.025g / ml dimethylformamide solution, react under stirring for 0.5 hours, and continue the reaction at 90°C 30 minutes to complete.

[0030] The size of the contact angle with a liquid is a common means to characterize the hydrophobic (oil) and hydrophilic (oil) properties of a surface. Generally speaking, a contact angle lower than 90° is a hydrophilic (oil) surface, while a contact angle higher than 90° It is a hydrophobic (oil) surface, and...

Embodiment 2

[0035] Clean and saturate the reaction kettle equipped with nitrogen protection tube, thermometer and electric stirrer with nitrogen gas saturation, add 4 grams of polyethylene glycol (PEO) with an average molecular weight of 2000, and fluoroalcohol CF (CF 2 ) 6 CH2 CH 2 0.5 g of OH, preheated at 120°C for 1 hour, added 1.5 g of preheated diphenylmethyl diisocyanate and 0.05 ml of stannous octoate under stirring at 80°C, stirred and reacted for 4 hours, added tetrahydrofuran homopolyether 2.0 grams of diol (average molecular weight 2000), stirred rapidly until the reaction was completed, extruded and cooled to form.

Embodiment 3

[0037] Add 1.0 moles of polyethylene glycol with a molecular weight of 2000, 5 moles of diphenylmethyl diisocyanate, and 0.05 milliliters of triethylenediamine as a catalyst into the reaction kettle under the protection of argon, heat at 80°C and stir, 2 Gradually add 6000ml of solvent dimethylformamide within 1 hour, add 0.5 mole of tetrahydrofuran homopolyether diol at 30°C, react under stirring for 0.5 hour, add fluoroalcohol CF (CF 2 ) 8 CH 2 CH 2 0.5 moles of OH, stirred and reacted under the protection of argon for 30 minutes, added dropwise 0.5 moles of pentaerythritol (made into a dimethylformamide solution with a concentration of 0.05g / ml) at 50°C, and added tetrahydrofuran-propylene oxide after reacting for half an hour 2.5 moles of dibasic copolyether glycol were reacted to completion.

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PUM

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Abstract

The present invention relates to a super biphobic block polyether type polyurethane copolymer, its end group is fluorocarbon hydrophobic group and its middle is hydrophilic chain segment, and its general formula is [CF3(CF2)n(CH2)mO]x-Pu-[O(CH2)m(CF2)nCF3]x. Its preparation process includes the following steps: pre-heating hydrophilic polyether diol and one-ended hydroxy fluoroalcohol, placing them into reactor under the condition of argon gas protection, cooling and adding diisocyanate and adding long-chain chain-extending agent, stirring to make reaction. Said copolymer has good anti-coagulating property, can be used for preparing bio-medical material, and can be used for protecting surface of ship body and building.

Description

technical field [0001] The invention relates to a super amphiphobic block polyether type polyurethane copolymer. [0002] The present invention also relates to a process for the preparation of the above-mentioned copolymers. [0003] The present invention also relates to the application of the above-mentioned copolymer in the preparation of biomedical materials, waterproof, antifouling, oil-proof coatings, and anti-microbial adhesion coatings for ship hulls. Background technique [0004] With the rapid development and interpenetration of polymer science, medicine and biology, biomedical polymers have become new functional materials with broad application prospects, and people have invested a lot of energy in the preparation of polymer biomedical materials. Studies have shown that most polymer materials cause different degrees of blood coagulation when they come into contact with blood. Many medical polymers have been prepared, such as organic cinnamon rubber, polyurethane, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/64C09D175/08
Inventor 谢琼丹徐坚张小莉戴新华罗向东唐文红
Owner INST OF CHEM CHINESE ACAD OF SCI
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