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Synthesis method of organic fluorine and silicon modified waterborne polyurethane

A technology of water-based polyurethane and synthesis method, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor water resistance, poor mechanical properties, limited application of water-based polyurethane, etc., and achieve the effect of improving wear resistance

Inactive Publication Date: 2020-12-15
南京博科新材料产业研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although water-based polyurethane has good low temperature resistance, good flexibility and bonding strength, compared with solvent-based polyurethane using organic solvent as the dispersion medium, there is still a big gap in various properties of water-based polyurethane. Disadvantages such as poor water resistance, low temperature resistance and poor mechanical properties
These shortcomings seriously limit the application of waterborne polyurethane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] A kind of organic silicon of the present invention, the synthetic method of fluorine-modified waterborne polyurethane, concrete steps comprise as follows:

[0019] (1) Put polytetrahydrofuran ether glycol (PTMG) and 1,4-butanediol (1,4-BDO) in a vacuum oven with a constant temperature of 60°C to dry and remove water for 2 hours;

[0020] (2) The main reaction monomer polytetrahydrofuran ether glycol (PTMG) and isophorone diisocyanate (IPDI) after step (1) drying are added in proportion to the In the three-necked flask of nitrogen gas, add the small molecule chain extender 1,4-butanediol (1,4-BDO) and the hydrophilic chain extender dimethylol propionic acid after the step (1) of the stoichiometric ratio is dried (DMPA), modifier perfluoropolyether oil (E10-H) and polydimethylsiloxane (PDMS), then add dropwise 0.02ml initiator dibutyltin dilaurate (DBTDL) and 10ml organic solvent N, N-dimethylolacetamide (DMAC) was used to reduce the reaction viscosity; after the oil bat...

Embodiment 1

[0022] Embodiment 1: The quality of the modifier perfluoropolyether oil (E10-H) and polydimethylsiloxane (PDMS) all accounts for 5% of the total reaction monomer mass; the polydimethylsiloxane The number average molecular weight of alkanes (PDMS) is 550.

Embodiment 2

[0023] Embodiment 2: the quality of described modifying agent perfluoropolyether oil (E10-H) and polydimethylsiloxane (PDMS) all accounts for the total reaction monomer quality: 10%; The number average molecular weight of oxane (PDMS) is 1000.

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PUM

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Abstract

The invention discloses a synthetic method of organic silicon and fluorine modified waterborne polyurethane. According to the invention, excellent surface properties of organic fluorine and organic silicon are utilized, and organic fluorine and organic silicon are introduced into a molecular main chain of waterborne polyurethane through gradual polymerization, so as to achieve the purpose of modification. The waterborne polyurethane product prepared by the synthesis method disclosed by the invention is greatly improved in price economy and various properties (mechanical strength, water resistance, solvent property, high-temperature resistance, wear resistance and the like).

Description

technical field [0001] The invention relates to the field of waterproof coatings, in particular to a method for synthesizing organic silicon and fluorine-modified waterborne polyurethane. Background technique [0002] Polyurethane waterproof material has high tensile strength, good adhesion to the substrate, and many excellent properties such as wear resistance, water resistance and chemical organic solvent corrosion resistance. The waterproof coatings and other products based on it in construction have been Showing technical advantages, the variety is increasing day by day. Among modern polymer coating waterproof materials, polyurethane waterproof coatings have more prominent advantages. [0003] Polyurethane waterproof coatings are used in various types of house interior and exterior wall waterproofing projects, underground building waterproofing projects, kitchens, bathrooms, industrial and civil reservoirs, swimming pool anti-leakage, underground pipeline waterproofing, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/34C09D175/08
CPCC08G18/3206C08G18/348C08G18/4854C08G18/6692C09D175/08
Inventor 周栋梁秦玉娇赵君
Owner 南京博科新材料产业研究院有限公司
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