Leather printing paste and preparation method thereof

A printing paste and leather technology, which is applied in the field of leather printing paste, can solve the problems affecting the leather printing feel, cold-touch brittleness, hot-stick cold-brittleness, etc., and achieves the effects of good elasticity, soft touch and strong color-fixing ability.

Active Publication Date: 2015-07-01
LIAONING FIXED STAR FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main disadvantage of the above-mentioned prior art is that because the functional ester group (—COO—) of the acrylic resin is in the side chain of the macromolecular structure, it is sensitive to temperature, so it has the problem of “hot stickiness and cold brittleness”, which affects leather printing. The hand feel is sticky in hot summer and brittle in cold winter

Method used

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  • Leather printing paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1, A1 component preparation:

[0060] (1) 180 parts of polyoxypropylene ether diol (number average molecular weight 2000), 4.5 parts of 1,4-butanediol, 2 parts of trimethylol propane, 10 parts of dimethylol propionic acid, toluene diisocyanate Add 56 parts of (TDI), 0.03 parts of dibutyltin dilaurate, and 30 parts of acetone into the reaction kettle in turn, stir and heat up, and react at 70±2°C for 7 hours to prepare a polyurethane prepolymer;

[0061] (2) Then add 12.6 parts of glycidol and react at 77±2°C for 4.5 hours to obtain a glycidol-terminated polyurethane prepolymer;

[0062] (3) Put the above-mentioned glycidol-terminated polyurethane prepolymer into an emulsification kettle, cool down to 30±2°C, add 7.5 parts of triethylamine and stir evenly, stir quickly, add 590 parts of deionized water for emulsification, and emulsification is complete Finally, add 8.9 parts of thickener and stir for 40 minutes to obtain epoxy-based polyurethane resin printi...

Embodiment 2

[0063] Embodiment 2, A2 component preparation:

[0064](1) 180 parts of polyoxypropylene ether diol (number average molecular weight 1800), 5 parts of neopentyl glycol, 3 parts of trimethylolpropane, 11 parts of dimethylol butyric acid, toluene diisocyanate (TDI) 30 parts, 29.4 parts of 1.6-hexamethylene diisocyanate (HDI), 36 parts of dimethylformamide, and 0.04 parts of dibutyltin acetate were added to the reaction kettle in sequence, stirred and heated up, and reacted at 76±2°C for 7 hours to obtain Polyurethane prepolymer;

[0065] (2) Then add 13.4 parts of glycidol and react at 76±2°C for 5 hours to obtain a glycidol-terminated polyurethane prepolymer;

[0066] (3) Put the glycidol-terminated polyurethane prepolymer in the emulsification kettle, cool down to 30±2°C, add 7.5 parts of triethylamine and stir evenly, then stir quickly, add 600 parts of deionized water for emulsification, after emulsification , add 9 parts of thickener, and stir for 50 minutes to prepare ...

Embodiment 3

[0067] Embodiment 3, A3 component preparation:

[0068] (1) 190 parts of polyoxypropylene ether diol (number average molecular weight 2500), 2.5 parts of 1,4-butanediol, 2.5 parts of neopentyl glycol, 3.5 parts of trimethylolpropane, dimethylolpropane Add 13.4 parts of acid, 80.5 parts of isophorone diisocyanate (IPDI), 0.04 parts of dibutyltin dilaurate, 20 parts of N-methylpyrrolidone, and 20 parts of acetone. ℃ for 7 hours to prepare a polyurethane prepolymer;

[0069] (2) Then add 14.2 parts of glycidol and react at 77±2°C for 4.5 hours to obtain a glycidol-terminated polyurethane prepolymer;

[0070] (3) Put the glycidol-terminated polyurethane prepolymer in the emulsification kettle, cool down to 25±2°C, add 10.1 parts of triethylamine and stir evenly, then stir quickly, add 690 parts of deionized water for emulsification, after emulsification , add 10.5 parts of thickener and stir for 45 minutes to prepare epoxy-based polyurethane resin printing paste A3.

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Abstract

The invention relates to a leather printing paste and its preparation method. The leather printing paste is a combined two-component polyurethane resin printing paste containing epoxy polyurethane resin and amino-polyurethane resin. The epoxy polyurethane resin and the amino-polyurethane resin are mixed and heated to react so as to form a good network structure. The prepared leather printing paste has good heat resistance and cold resistance. In addition, the leather printing paste has good elasticity and feels soft and smooth. The leather printing paste is water-tolerant and solvent resistant, and has excellent dry and wet rubbing fastness.

Description

technical field [0001] The invention relates to a leather printing paste, in particular to a printing paste for leather grain leather and its preparation method and application. [0002] The leather printing paste of the invention is a leather printing paste composed of two-component polyurethane resin. Background technique [0003] Genuine leather grain leather printing is to use leather printing paste to print beautiful patterns on the leather surface through flat screen or manual platen printing. [0004] "Leather and Chemical Industry" magazine 2011, 28 (3): 14-16, "Synthesis and Application of Leather Elastic Color Printing Paste" [J]. In this paper, a kind of synthesis and application of acrylic resin leather elastic color printing paste is disclosed . The article mentions the use of itaconic acid, ethyl acrylate, allyl polyoxyalkylene epoxy ether, γ-methacryloxypropyl trimethoxysilane, and methyl methacrylate as the main raw materials , After radical polymerization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/52D06P3/32C08G18/66C08G18/48C08G18/32C08G18/34C08G18/12
Inventor 杨文堂樊丽君唐丽荣星李刚刘杰孙海娥宋明智
Owner LIAONING FIXED STAR FINE CHEM
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