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Polyurethane retanning filler

A filler, polyurethane technology, applied in the field of polyurethane retanning fillers, to achieve the effects of good water resistance and yellowing resistance, good environmental protection, good softness and flex resistance

Inactive Publication Date: 2013-04-10
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the retanning filler products currently on the market are aromatic and are prone to yellowing under light, so there are great limitations in application and are not suitable for light-colored leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Prepare prepolymer with isophorone diisocyanate (IPDI), polyethylene glycol (PEG), castor oil, dimethylol butyric acid (DMBA) as raw materials, react for 2h, wherein IPDI and PPG, castor oil, DMBA The molar ratio is 1.3:1, the amount of materials such as castor oil and PEG, DMBA accounts for 6% of prepolymer quality. Cool down to 40°C, add triethylamine for neutralization reaction to generate salt, react for 3 minutes, wherein the amount of triethylamine is the same as that of DMBA. Add an aqueous solution of ethylenediamine (EA) for emulsification and chain extension for 1 hour, wherein the amount of ethylenediamine (EA) is 0.1% of the mass of the prepolymer, and the amount of water is 2 times the total mass of the prepolymer to obtain polyurethane retanning fillers.

Embodiment 2

[0018] Prepare prepolymer with isophorone diisocyanate (IPDI), polyethylene glycol (PEG), castor oil, dimethylol butyric acid (DMBA) as raw materials, react for 2h, wherein IPDI and PPG, castor oil, DMBA The molar ratio is 1.4:1, the amount of materials such as castor oil and PEG, and DMBA accounts for 7% of the prepolymer mass. Cool down to 40°C, add triethylamine for neutralization reaction to generate salt, react for 3 minutes, wherein the amount of triethylamine is the same as that of DMBA. Add an aqueous solution of ethylenediamine (EA) for emulsification and chain extension for 1 hour, wherein the amount of ethylenediamine (EA) is 0.1% of the mass of the prepolymer, and the amount of water is 2 times the total mass of the prepolymer to obtain polyurethane retanning fillers.

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PUM

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Abstract

The invention relates to a polyurethane retanning filler. The preparation method of the polyurethane retanning filler comprises the following steps: preparing a prepolymer from raw materials IPDI (isophorone diisocyanate), PEG (polyethylene glycol), castor oil and DMBA (dimethylbenzanthracene); adding triethylamine to carry out neutralization reaction to generate salt; and adding an ethylenediamine water solution to carry out emulsification and chain extension to prepare the water-based polyurethane emulsion. The coated film of the water-based polyurethane emulsion has favorable water resistance and yellowing resistance.

Description

technical field [0001] The invention relates to a polyurethane retanning filler, which belongs to the field of chemical industry. technical background [0002] Polyurethane retanning filler is a kind of retanning agent with excellent comprehensive performance. Because its molecular chain contains a large number of carbamate groups similar to the structure of natural leather collagen peptide chain, it can not only maintain the natural feel of leather, but also It can endow leather with excellent flexibility, fullness and dyeability, and its comprehensive performance is obviously better than that of acrylic resin retanning fillers. However, most of the retanning filler products currently on the market are aromatic and are prone to yellowing under light, so there are great limitations in application and are not suitable for light-colored leather. [0003] This patent uses castor oil to replace part of polyether or polyester polyol to prepare polyurethane resin with crosslinke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/67C08G18/48C08G18/12C14C3/22
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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