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Preparation method of soft segment lateral chain fluorine-containing waterborne polyurethane

A technology of water-based polyurethane and fluorine-containing polyether, which is applied in the field of surface coating, can solve the problems of low yield and slow synthesis reaction, and achieve the effects of low odor, reduced surface tension and improved mobility

Active Publication Date: 2010-09-08
GUANGDONG YINYANG ENVIRONMENT FRIENDLY NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two preparation methods have limitations. In order to avoid the cyclic dimer of fluorine-containing alkenyl ether alcohol, the synthesis reaction of the former must be carried out slowly under precisely controlled conditions, and the yield is not high. Or its reaction is a very complex process involving four steps

Method used

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  • Preparation method of soft segment lateral chain fluorine-containing waterborne polyurethane
  • Preparation method of soft segment lateral chain fluorine-containing waterborne polyurethane
  • Preparation method of soft segment lateral chain fluorine-containing waterborne polyurethane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of soft segment side chain fluorine-containing water-based polyurethane of the present invention is prepared by self-made fluorine-containing polyether diol, and the production formula is composed of the following component proportions (parts by weight):

[0024] (1) Synthesis of fluorine-containing glycidyl ether: Add 22 parts of epichlorohydrin and 8 parts of sodium hydroxide into a three-necked flask, heat and stir at high speed, and slowly add octafluoropentanol 46 at 40-60°C part, continue to react for 2-3h; stop the reaction, remove the sodium chloride generated by the reaction by suction filtration, and remove the epoxy compound by distillation under reduced pressure to obtain fluorine-containing glycidyl ether; its reaction formula is

[0025]

[0026] Among them, Rf=H(CF 2 ) 6 , H(CF 2 ) 4 , or H(CF 2 ) 2 ;

[0027] (2) Synthesis of side chain fluorine-containing polyether glycol (PFGE)

[0028] Add measured 0.18 parts of 1,4-butanediol, 0.28 p...

Embodiment 2

[0036] On the basis of the above steps (1) (2), take 60 parts of toluene diisocyanate (IPDI), 50 parts of fluorine-containing polyether glycol (PFGE), 50 parts of polybutylene adipate, and 0.02 parts of catalyst , 10 parts of dimethylolpropionic acid (DMPA), 350 parts of water.

[0037] The water-based polyurethane of the above formula is produced by the following preparation method, reacting fluorine-containing polyether glycol (PFGE), polybutylene adipate, DMPA, IPDI and catalyst at 80-85°C for 5-8h, and cooling to 40°C ℃, add neutralizing agent to react for 30 minutes, add water to disperse for 30 minutes, and then discharge.

[0038] The emulsion properties of this product are as follows:

[0039]

[0040] The film characteristics of this product are as follows:

[0041]

[0042]

[0043] Among them, HO-R 1 -OH is the general formula of polyester diol, HO-R 2 (R 3 )-OH is a hydrophilic chain extender, R 3 - for-COO - Anionic hydrophilic group, OCN-R 4 -NC...

Embodiment 3

[0049] On the basis of the above steps (1) (2), take 60 parts of toluene diisocyanate (TDI), 80 parts of fluorine-containing polyether glycol (PFGE), 20 parts of polybutylene adipate, and 0.02 parts of catalyst , 10 parts of dimethylolpropionic acid (DMPA), 350 parts of water.

[0050] The water-based polyurethane of the above formula is produced by the following preparation method, reacting fluorine-containing polyether glycol (PFGE), polybutylene adipate, DMPA, TDI and catalyst at 80-85°C for 5-8h, cooling to 40°C ℃, add neutralizing agent to react for 30 minutes, add water to disperse for 30 minutes, and then discharge.

[0051] The emulsion properties of this product are as follows:

[0052]

[0053] The film characteristics of this product are as follows:

[0054]

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Abstract

The invention discloses a preparation method of soft segment lateral chain fluorine-containing waterborne polyurethane, which comprises the following preparation steps: (1) synthesizing fluorine-containing glycidyl ether; (2) synthesizing lateral chain fluorine-containing polyether glycol; and (3) preparing the soft segment lateral chain fluorine-containing waterborne polyurethane. The invention is mainly characterized in that fluorine elements are introduced on the lateral chain of the waterborne polyurethane, so the surface performance of the waterborne polyurethane is improved, and the waterborne polyurethane has the waterproof performance, oil resistance performance, stain resistance performance and excellent chemical stability.

Description

technical field [0001] The invention belongs to the technical field of surface coatings, in particular to a preparation method and application of soft segment side chain fluorine-containing waterborne polyurethane. Background technique [0002] Water-based polyurethane (WPU) uses water as the dispersion medium. It not only has the excellent properties of solvent-based PU, such as low temperature resistance, good flexibility, and high bond strength, but also has the advantages of non-combustibility, low odor, no pollution to the environment, and energy saving. It can be widely used It is used in light textile, printing and dyeing, leather processing, paint and paper making industries. Waterborne polyurethane is usually prepared by introducing water-soluble segments into the main chain of polyurethane. The water-soluble segment acts as an internal emulsifier, so that the polyurethane can be well dispersed in water without strong mechanical stirring and adding emulsifiers. ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/50C08G65/28C08L75/08
Inventor 刘涛
Owner GUANGDONG YINYANG ENVIRONMENT FRIENDLY NEW MATERIALS CO LTD
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