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Terminated short fluorocarbon chain hyperbranched nano hybrid leather super-hydrophobic coating material and preparation method thereof

A technology with short fluorocarbon chains and terminal hydroxyl hyperbranching, which is applied in leather surface treatment, polyurea/polyurethane coating, small raw leather/big raw leather/leather/fur treatment, etc., and can solve the problem of high water-based polyurethane water resistance and easy pollution of the environment Cost and other issues, to achieve the effect of improving water resistance, improving hydrophobicity, and reducing the amount of introduction

Active Publication Date: 2019-07-26
浙江温州轻工研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a superhydrophobic coating material for ultra-branched nano-hybrid leather with short-terminal fluorocarbon chains in order to overcome the problems of serious safety hazards, easy pollution of the environment, high cost and the poor water resistance of water-based polyurethane in the existing solvent-based polyurethane. and its preparation method

Method used

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  • Terminated short fluorocarbon chain hyperbranched nano hybrid leather super-hydrophobic coating material and preparation method thereof
  • Terminated short fluorocarbon chain hyperbranched nano hybrid leather super-hydrophobic coating material and preparation method thereof
  • Terminated short fluorocarbon chain hyperbranched nano hybrid leather super-hydrophobic coating material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034]Add 0.78g of mercaptoethanol (β-ME) and 12.50g of hexafluorobutyl methacrylate into a four-neck flask with a condenser tube, and add 30g of ethyl acetate to it, then feed nitrogen into the flask for 10min, Bleed the air out of the system. Add dropwise 0.16g azobisisobutyronitrile (AIBN) that is dissolved in 20g ethyl acetate afterwards, continue feeding nitrogen under the condition of 70 ℃ and start stirring reaction 15h, rotary evaporation removes ethyl acetate afterwards, then use n-heptyl Wash with alkane to remove unreacted monomers, and finally vacuum-dry to remove n-heptane to obtain light yellow viscous oligomeric short fluorocarbon chain monohydric alcohol (PF-OH). Accurately weigh 3.00g of nano-SiO2 and disperse in acetone, and disperse evenly in an ultrasonic disperser at room temperature; then weigh 0.55g of KH-550 and add it to the dispersion, continue to disperse evenly by ultrasonic, and then transfer it to a three-necked flask. Stir the reaction at C for ...

Embodiment 2

[0036] Add 0.78g of mercaptoethanol (β-ME) and 16.80g of trifluoroethyl methacrylate into a four-necked flask with a condenser tube, and add 40g of ethyl acetate to it, then feed nitrogen into the flask for 10min, Bleed the air out of the system. Add dropwise 0.16g azobisisobutyronitrile (AIBN) that is dissolved in 20g ethyl acetate afterwards, continue feeding nitrogen under the condition of 70 ℃ and start stirring reaction 15h, rotary evaporation removes ethyl acetate afterwards, then use n-heptyl Wash with alkane to remove unreacted monomers, and finally vacuum-dry to remove n-heptane to obtain light yellow viscous oligomeric short fluorocarbon chain monohydric alcohol (PF-OH). Accurately weigh 3.10g of nano-SiO2 and disperse in acetone, and disperse evenly in an ultrasonic disperser at room temperature; then weigh 0.45g of aminopropyltrimethoxysilane and add it to the dispersion, continue to disperse evenly with ultrasonic, and then transfer it to a three-necked flask , s...

Embodiment 3

[0038] Add 1.56g of mercaptoethanol (β-ME) and 37.50g of hexafluorobutyl methacrylate into a four-necked flask with a condenser tube, and add 120g of ethyl acetate to it, then feed nitrogen into the flask for 10min, Bleed the air out of the system. Add dropwise 0.16g azobisisobutyronitrile (AIBN) that is dissolved in 20g ethyl acetate afterwards, continue feeding nitrogen under the condition of 70 ℃ and start stirring reaction 15h, rotary evaporation removes ethyl acetate afterwards, then use n-heptyl Wash with alkane to remove unreacted monomers, and finally vacuum-dry to remove n-heptane to obtain light yellow viscous oligomeric short fluorocarbon chain monohydric alcohol (PF-OH). Accurately weigh 5.80g of nano-SiO2 and disperse in acetone, and disperse evenly in an ultrasonic disperser at room temperature; then weigh 1.11g of KH-550 and add it to the dispersion, continue to disperse evenly by ultrasonic, and then transfer it to a three-necked flask. The reaction was stirre...

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Abstract

The invention discloses a terminated short fluorocarbon chain hyperbranched nano hybrid leather super-hydrophobic coating material and a preparation method thereof. The preparation method includes: mixing mercaptoethanol and fluorinated acrylate, and dropwise adding azodiisobutyronitrile for reaction to obtain oligomeric short fluorocarbon chain monohydric alcohol; adding nano SiO2 into a silane coupling agent, adding methyl N, N-dihydroxyethyl-3-amino-propionate to obtain terminated hydroxyl superbranched nano hybrid polymer; mixing polyester or polyether polyol and isophorone diisocyanate for reaction to obtain NCO terminated polyurethane prepolymer PU; dissolving oligomeric short fluorocarbon chain monohydric alcohol into ethyl acetate,, dropping the NCO terminated polyurethane prepolymer PU, and adding the terminated hydroxyl superbranched nano hybrid polymer for reaction to obtain the coating material. The problem that existing solvent-type polyurethane has serious potential safety hazards and easily polluts environment and high in cost and the problem of low waterproofness of waterborne polyurethane are solved.

Description

technical field [0001] The invention relates to the technical field of leather finishing agents, in particular to a short-terminal fluorocarbon chain hyperbranched nano-hybrid leather superhydrophobic finishing material and a preparation method thereof. Background technique [0002] In recent years, waterproof, stain-resistant and self-cleaning properties have become a major demand for high-end leather products. Leather waterproof can be divided into surface waterproof and deep waterproof. The crust leather produced by deep waterproof processing will affect the bonding firmness between the coating and the leather blank, thereby limiting its application range. Surface waterproofing can use waterproof finishing agent to spray the leather surface, the method is simple and the effect is remarkable. Polyurethane (PU) leather finishing agent has attracted widespread attention in the leather industry for its excellent performance. Compared with solvent-based polyurethane, water-...

Claims

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Application Information

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IPC IPC(8): C09D175/04C14C11/00
CPCC09D175/04C14C11/006
Inventor 许伟赵维甲王文郝丽芬
Owner 浙江温州轻工研究院
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