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Waterborne nitrocotton brightener and preparation method thereof

A technology of nitrocellulose and brightening agent, applied in the direction of water-based dispersant, etc., can solve the problems of poor gloss retention and poor stability of water-based nitrocellulose emulsion.

Inactive Publication Date: 2016-06-01
SICHUAN DOWELL SCI & TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, water-based nitrocellulose varnish mainly uses isooctyl acetate to dissolve nitrocellulose, uses castor oil and dioctyl adipate as a plasticizer, and uses castor oil polyoxyethylene ether for emulsification, so that the obtained water-based nitrocellulose emulsion Poor stability, poor gloss retention after painting

Method used

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  • Waterborne nitrocotton brightener and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a kind of preparation method of aqueous nitrocellulose brightener, comprises the following steps:

[0037] A) In parts by weight, 50-150 parts of nitrocellulose, 0.2-5 parts of rosin resin and 300-7001 parts of mixed solvent are mixed to obtain a nitrocellulose solution,

[0038] The mixed solvent includes a first solvent and a second solvent, and the first solvent includes ethylene glycol butyl ether acetate;

[0039] Described second solvent comprises one or more in isooctyl acetate, butyl acetate and ethylene glycol butyl ether;

[0040] B) Mix 30-100 parts of plasticizer, 8-45 parts of emulsifier, 200-600 parts of water and the nitrocellulose solution obtained in the step A), and emulsify to obtain a water-based nitrocellulose brightener.

[0041] In the present invention, the nitrocellulose is first dissolved, and 50 to 150 parts of nitrocellulose, 0.2 to 5 parts of rosin resin and 300 to 700 parts of mixed solvent are mixed to ...

Embodiment 1

[0058] (1) Dissolving nitrocellulose:

[0059] Add 400g of mixed solvent (200g of isooctyl acetate, 200g of ethylene glycol butyl ether acetate) into the reaction kettle, add 0.5g of rosin resin and 100g of 1 / 2S nitrocellulose under stirring, stir for 0.5 hours, the rosin resin and nitrocellulose are fully dissolved , to obtain the nitrocellulose solution;

[0060] (2) Phase inversion emulsification:

[0061] Add 80 g of epoxidized soybean oil and 5 g of castor oil polyoxyethylene ether into the nitrocellulose solution under stirring, stir for 10 minutes, stop stirring, add 10 g of fatty alcohol polyoxyethylene ether that has been uniformly mixed with 400 g of deionized water in advance, and let stand Stratification for 60 minutes, high-speed emulsification for 60 minutes and discharge to obtain the product;

[0062] The present invention has measured the glossiness of water-based nitrocellulose brightener in the present embodiment according to paper and cardboard specular g...

Embodiment 2

[0065] (1) Dissolving nitrocellulose:

[0066] Add 540g of mixed solvent (270g of ethylene glycol butyl ether acetate, 270g of isooctyl acetate) into the reaction kettle, add 1.5g of rosin resin and 120g of 1 / 2S nitrocellulose under stirring, stir for 1 hour, and the rosin resin and nitrocellulose are fully dissolved , to obtain the nitrocellulose solution;

[0067] (2) Phase inversion emulsification:

[0068] Add epoxy soybean oil 60g and castor oil polyoxyethylene ether 7.5g into the nitrocellulose solution under stirring, stir for 10 minutes, stop stirring, add fatty alcohol polyoxyethylene ether 15g that has been uniformly mixed with deionized water 300g in advance, and statically Set the layers for 60 minutes, high-speed emulsification for 60 minutes and discharge to obtain the product;

[0069] The present invention has measured the glossiness of water-based nitrocellulose brightener in the present embodiment according to paper and cardboard specular gloss measurement ...

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Abstract

The invention provides a waterborne nitrocotton brightener which comprises the following components: in parts by weight, 50-150 parts of nitrocotton, 8-45 parts of an emulsifier, 30-100 parts of a plasticizer, 0.2-5 parts of rosin resin, 300-700 parts of mixed solvents and 200-600 parts of water, wherein the mixed solvents comprises a first solvent and a second solvent, the first solvent comprises butoxyethyl acetate, and the second solvent comprises one or more of Isooctyl acetate, n-butyl acetate and butyl cellosolve. The brightener adopts the mixed solvents containing butoxyethyl acetate, and butoxyethyl acetate is not only more flexible than other solvents, but also is helpful for product dilution stability at the same time; meanwhile, the rosin resin can adjust the permeability of the brightener, therefore, the product brightness is further improved.

Description

technical field [0001] The invention belongs to the technical field of leather auxiliary agents, in particular to a water-based nitrocellulose brightener and a preparation method thereof. Background technique [0002] With the development of the tanning industry, leather products are more and more widely used in people's daily life, such as sofas, clothes, and mats and seat cushions, which are more popular in recent years. In the process of tanning, leather finishing can make The leather surface forms the appearance of various colors, luster and styles, and makes the leather obtain a certain degree of water resistance and easy maintenance. The main components of leather finishing agents are film-forming agents, colorants, brighteners, fixatives, hand feeling agents, etc. Among them, bright finishing is a very important process, which affects the appearance, hygienic performance and physical and mechanical properties of leather products. has a vital impact. [0003] Bright ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/04
CPCC09G1/04
Inventor 蔡明杨斯盛严建林
Owner SICHUAN DOWELL SCI & TECH INC
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