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Fluorine-containing polyurethane and preparation method thereof

A polyurethane and polymer technology, applied in polyurea/polyurethane coatings, coatings, paper coatings, etc., can solve problems such as poor controllability, environmental pollution, and loss of "three-proof" functions, and achieve excellent waterproof effects

Active Publication Date: 2011-07-06
SHANGHAI HEDA POLYMERIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the first step of the preparation process of the method, polyfunctional amines and alcohol amine chain extenders can easily cause the system to gel, thereby making the controllability of the reaction poor; "Connected to the main chain of polyurethane, this structure is similar to fluoroalkyl methacrylate polymer, which is easy to hydrolyze to produce perfluoropolyether acid, which will lose the "three defense" function and cause serious environmental pollution problems

Method used

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  • Fluorine-containing polyurethane and preparation method thereof
  • Fluorine-containing polyurethane and preparation method thereof
  • Fluorine-containing polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Step 1: Add 105g of toluene diisocyanate TDI to a three-necked flask equipped with a thermometer, a constant pressure dropping funnel and a stirrer, protect it with nitrogen, and heat up to 80°C; Oxypropylene diol 210, after 1 hour of dripping, continue to react at 80°C for 1 hour, then add 12g of 1,4-butanediol chain extender to it, react at 70°C for 2 hours, stop the reaction after NCO reaches the theoretical value, and obtain isocyanate prepolymer.

[0060] Step 2: 46.46g of octafluoropentanol and 27.7g of 1,4-cyclohexane diisocyanate CHDI were dissolved in 173.1g of tetrahydrofuran to form a 30wt% solution, and the solution was added to a three-necked flask equipped with a thermometer and a stirrer In the process, nitrogen was passed to remove oxygen, and when the temperature rose to 80°C, 0.25g of triethylenediamine catalyst was added, and reacted at 80°C for 2 hours, and the temperature was lowered to 60°C after NCO reached the theoretical value. Afterwards, 20.1...

Embodiment 2

[0063] Step 1: Add 17.57g hexamethylene diisocyanate HDI, 41.79g polyethylene adipate diol PEA2000 and 59.36g acetone to a three-necked flask equipped with a thermometer and a stirrer, and stir to form 50wt% After heating up to 80°C, add 0.06g of stannous octoate catalyst, keep at 80°C for 3 hours, and stop the reaction after the NCO reaches the theoretical value to obtain an isocyanate prepolymer.

[0064] Step 2: 30g perfluoroalkyl ethyl heptanol and 19.97g toluene diisocyanate TDI are dissolved in 49.97g butyl acetate to form a 50wt% solution, and this solution is added to a three-necked flask equipped with a thermometer and agitator , Nitrogen to remove oxygen, when the temperature rises to 70°C, add 0.03g stannous octoate catalyst, and react at 70°C for 0.6h, when NCO reaches the theoretical value, lower the temperature to 60°C. Afterwards, 7.92 g of glycerin and 7.92 g of butyl acetate were added and reacted at 60° C. for 1 hour to obtain a butyl acetate solution of a fl...

Embodiment 3

[0067] Step 1: Add 20.77g of polyoxypropylene diol 220 to a three-necked flask equipped with a thermometer and a condenser, vacuum dehydrate at 120°C for 4 hours, and add 36g of diphenylmethane diisocyanate MDI, 0.65g of ethylene glycol and 0.01g of dibutyltin dilaurate were kept at 50°C for 3 hours. After the NCO reached the theoretical value, the reaction was terminated to obtain an isocyanate prepolymer.

[0068] Step 2: 81.67g perfluoroalkyl ethyl decanol and 44.05g diphenylmethane diisocyanate MDI are dissolved in 53.88gN, in N-dimethylformamide, form a 70wt% solution, this solution is added to the In the three-necked flask with thermometer and stirrer, when the temperature rises to 60°C, add 0.2g of cyclohexylmethyl tertiary amine catalyst, and react at 60°C for 2h, and add 14.24g of triethanolamine and 6.1g of NCO after the NCO reaches the theoretical value. , N-dimethylformamide, react at 60°C for 1h to obtain N,N-dimethylformamide solution of fluoropolymer chain exten...

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Abstract

The invention discloses fluorine-containing polyurethane which is water-resistant, oil-resistant and conglutination-resistant and a preparation method thereof. The simple and effective method prepares the fluorine-containing polymer diol chain extender, so that the fluorine alkyl base chain is vertical to the main chain of polyurethane by ammonia ester bond, therefore, the three-protection capability and the hydrolysis resistance of the fluorine-containing polyurethane are reinforcing. The fluorine-containing polyurethane can be used as textile finishing agent, paper and leather finishing agent, self-cleaning coating additive, releasing agent and the like.

Description

technical field [0001] The invention relates to a fluorine-containing polyurethane with water-repelling, oil-repelling and anti-adhesion functions, its preparation method, and its application as fabric finishing agent, paper and leather finishing agent, self-cleaning paint additive and release agent. technical background [0002] With the development of social economy and technology, people have more and more demands for high-quality and multi-functional materials, and the requirements for water-resistance, oil-resistance and anti-fouling effects of materials in many fields are also getting higher and higher, especially in the field of textile finishing. , coatings, construction, automotive and paper industries. [0003] The strong electronegativity of fluorine, high C-F bond energy (540kJ / mol), the smallest van der Waals radius except hydrogen, and the shielding effect of fluorine on carbon chains endow fluoropolymers with superior thermal stability, weather resistance and ...

Claims

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Application Information

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IPC IPC(8): C08G18/78D06M15/576C09D175/04D21H19/24
Inventor 杨小敏万乐鸣万小龙
Owner SHANGHAI HEDA POLYMERIC TECH
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