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Leather pigment paste with iridescent effect and preparation method thereof

A pigment paste and leather technology, applied in the field of pigments, can solve the problems of difficulty in forming dispersions, unfavorable dispersants, and no prefabricated pigment paste, etc., and achieve the effects of good atomization performance, simple and easy-to-control process, and good applicability

Inactive Publication Date: 2020-08-07
SICHUAN DOWELL SCI & TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The iridescent effect pigment paste has interference transformation colors similar to iridescent yellow, red, purple, blue, and green. The pigment crystal structure used is rutile, with good light stability and color migration resistance. However, the multilayer metal oxide coating of this type of pigment The characteristics of coating are not conducive to the anchoring of dispersant, and it is difficult to form a stable dispersion by adsorption.
Based on the current application examples in the automotive paint industry, the pigment powder is directly added to the car paint, and there is no pre-made pigment paste (or color paste) for use; and there is no iridescent effect pigment paste and similar products in the leather industry. come out
In addition, in the actual use process, the compatibility of different resin systems is not the same, and the atomization performance is difficult to control

Method used

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  • Leather pigment paste with iridescent effect and preparation method thereof
  • Leather pigment paste with iridescent effect and preparation method thereof
  • Leather pigment paste with iridescent effect and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The present embodiment provides a method for preparing a leather pigment paste with an iridescent effect, comprising the steps of:

[0033] (1) 50kg deionized water is divided into two parts, get 40kg deionized water a and 10kg deionized water b; Then 40kg deionized water a and 8kg have the acrylic acid block copolymer dispersant of pigment affinity group, Mix 0.5kg of polyoxyethylene alkylphenol ether wetting agent, 0.1kg of polyether antifoam agent and 0.5kg of triethanolamine pH regulator, and place in a dispersing and stirring device, and disperse and stir for 15min under the condition of 200r / min to obtain Prefabricated dispersion a;

[0034] (2) Increase the stirring speed to 500r / min, then sequentially add 0.5kg of water-based polyamide wax orientation aid and 15kg of iridescent effect pigments with a particle size of 2μm and continue stirring for 30min, then increase the stirring speed to 800r / min for the second time, and the stirring is completed A prefabricat...

Embodiment 2

[0038] The present embodiment provides a method for preparing a leather pigment paste with an iridescent effect, comprising the steps of:

[0039] (1) Divide 65kg of deionized water into two parts to obtain 55kg of deionized water a and 10kg of deionized water b; then mix 55kg of deionized water a with 15kg of organosilicon-modified polysiloxane with pigment affinity groups Ionic copolymer dispersant, 2kg polyoxyethylene fatty alcohol ether wetting agent, 0.5kg polyether foam suppressor and 2kg AMP-95pH regulator are mixed, and placed in a dispersing and stirring device, under the condition of 500r / min Disperse and stir for 60 minutes to obtain prefabricated dispersion a;

[0040](2) Increase the stirring speed to 800r / min, then sequentially add 1.5kg of ethylene-vinyl acetate copolymer orientation aid and 25kg of iridescent effect pigments with a particle size of 100μm and continue stirring for 120min, then increase the stirring speed to 1200r / min for the second time , after...

Embodiment 3

[0044] The present embodiment provides a method for preparing a leather pigment paste with an iridescent effect, comprising the steps of:

[0045] (1) Divide 57.5kg of deionized water into two parts to obtain 47.5kg of deionized water a and 10kg of deionized water b; Siloxane ionic copolymer dispersant, 1.25kg polyoxyethylene polyoxypropylene block copolymer wetting agent, 0.3kg polyether foam suppressor and 1.25kg NH 3 ·H 2 O pH adjuster is mixed, and is placed in the dispersing and stirring equipment, disperses and stirs 37min under the condition of 350r / min, obtains the prefabricated dispersion liquid a;

[0046] (2) Increase the stirring speed to 650r / min, then sequentially add 1kg of aralkyl modified silicone orientation aid and 20kg of iridescent effect pigments with a particle size of 50μm and continue stirring for 75min, then increase the stirring speed to 1000r / min for the second time, After the stirring is completed, a prefabricated dispersion b with a system parti...

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Abstract

The invention relates to leather pigment paste with an iridescent effect and a preparation method thereof. The leather pigment paste with the iridescent effect is prepared from the following raw materials in parts by weight: 50-65 parts of deionized water, 8-15 parts of a dispersant, 0.5-2 parts of a wetting agent, 0.5-2 parts of a pH regulator, 15-25 parts of an iridescent effect pigment, 0.1-0.5part of a foam inhibitor, 0.5-1.5 parts of a directional auxiliary agent, 1-5 parts of a rheological modifier, 0.1-0.5 part of an antifoaming agent, 1-5 parts of a humectant and 0.1-0.5 part of an antiseptic. The pigment paste has the advantages of being good in dispersion stability, obvious in iridescent effect and good in atomization performance, and the iridescent degree can be achieved according to the amount of reflected light. The leather pigment paste is suitable for a leather coating layer and has good compatibility with various resins in the coating agent; and the preparation methodis simple in process, easy to control and beneficial to large-scale production.

Description

technical field [0001] The invention belongs to the field of pigments, and in particular relates to a leather pigment paste with an iridescent effect and a preparation method thereof. Background technique [0002] Water-based leather pigment paste is a general term for the aqueous dispersion of pigments in the leather industry. It is the most common type of leather finishing colorant. It is mainly matched with film-forming leather finishing agents. Minor imperfections and undercolors, and impart a variety of colors to the leather coating. In terms of color effects, common leather pigment pastes include solid color, two-color effect, fluorescent effect, and ordinary pearlescent effect. In recent years, the demand for special colors in other leather fields such as bags and belts has been increasing. Iridescent pigment paste has a more fashionable and layered coloring effect, replacing the individual needs that cannot be met by ordinary pigment paste. industry attention. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00C09D7/65C09D7/63C09D7/61C14C11/00
CPCC09D17/007C09D17/001C09D7/65C09D7/63C09D7/61C14C11/003C14C11/006
Inventor 段向阳朱阳升高梦华杨斯盛
Owner SICHUAN DOWELL SCI & TECH INC
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