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A kind of nitrocellulose emulsion for leather and preparation method thereof

A technology of nitrocellulose and emulsion, applied in the direction of coatings, wax coatings, etc., can solve the problems of very high anti-sticking effect, unsatisfactory bonding performance, and failure to meet performance requirements, etc., to achieve fine hand feeling and improve anti-sticking effect, gloss-enhancing effect

Active Publication Date: 2022-04-19
成都市彭州铭众化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, an important index in the use of nitrocellulose emulsion is the anti-adhesive effect, especially when it is used as an intermediate isolation layer. In the case of large-scale assembly line operations of the manufacturer, or in the special use environment of customers, the anti-adhesive effect is required. Very high, especially when the skins that have just come off the assembly line are stacked immediately, it is especially necessary to avoid the stickiness of the leather blocks. However, most of the current commercially available products do not meet the performance requirements under extreme use conditions
Just as the existing patent document CN101476261A (a kind of quick-drying wax and its preparation method, 2009.07.08) records a kind of quick-drying wax composed of nitrocellulose, absolute ethanol, organic solvent and plasticizer. Although the wax achieves the degree of full drying in a very short time, and at the same time increases the flexibility, smoothness and brightness of the product, it has been proved by its experiments that its non-bonding temperature is only 30-50 ° C. The performance cannot meet the requirements of the current large-scale assembly line operation and the customer's special use environment

Method used

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  • A kind of nitrocellulose emulsion for leather and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] At room temperature, 450kg of isooctyl acetate was added to the reactor, then 85kg of nitrocellulose was added, and the stirring was carried out while stirring. The stirring speed was controlled at about 500 r / min. After 35 minutes, it was completely dissolved. 15kg of octyl ester, 25kg of EL10, stir for about 10min, until the mixture is uniform, heat up to 75℃, then add 15kg of molten palm wax, stir for about 10min, until the stirring is uniform, finally add 400kg of water, keep at 75℃ for emulsification for 20min, and then stir The temperature was lowered to room temperature, and the material was filtered to obtain a nitrocellulose emulsion.

Embodiment 2

[0026] At room temperature, 420kg of isooctyl acetate was added to the reaction kettle, then 82kg of nitrocellulose was added, and the stirring speed was controlled at about 500r / m. After 40min, it was completely dissolved. 16kg of octyl ester, 26kg of EL20, stir for about 10min, until the mixture is uniform, heat up to 75℃, then add 14kg of molten palm wax, stir for about 10min, until the stirring is uniform, finally add 430kg of water, keep at 75℃ for emulsification for 20min, and then stir The temperature was lowered to room temperature, and the material was filtered to obtain a nitrocellulose emulsion.

Embodiment 3

[0028] Add 300kg of butyl acetate into the reactor at room temperature, then add 50kg of nitrocellulose, stir while adding, and control the stirring speed at about 100r / m, completely dissolve after 30min, add 10kg of castor oil, 10kg of EL10, and stir for about 10min , until the mixing is uniform, heat up to 75 ° C, then add 1 kg of molten palm wax, stir for about 10 minutes, until the stirring is uniform, finally add 400 kg of water, keep the temperature at 0 ° C for emulsification for 150 min, then heat up while stirring, until room temperature, filter and discharge, A nitrocellulose emulsion is obtained.

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Abstract

The invention discloses a nitrocellulose emulsion for leather and a preparation method thereof, which comprises the following components in parts by mass: 5-15 parts of nitrocellulose, 1-10 parts of vegetable oil, 0-5 parts of plasticizer, 30-70 parts of organic solvent, 1-8 parts of emulsifier, 0.1-5 parts of waxy substance, and 20-70 parts of water. The formula components can significantly improve the anti-sticking performance of the product by adding wax components to the nitrocellulose emulsion formula, and can avoid the defect that the film of the nitrocellulose emulsion becomes sticky due to the plasticizer. In actual use, through reasonable adjustments The dissolving sequence of each component in the formula in the organic solvent can uniformly disperse the high melting point wax component in the nitrocellulose, thereby obtaining a nitrocellulose emulsion for leather with a smaller emulsion particle size.

Description

technical field [0001] The invention relates to a nitrocellulose emulsion for leather and a preparation method thereof, in particular to a leather coating emulsion prepared from nitrocellulose and a preparation method thereof, belonging to the field of leather coatings. Background technique [0002] Due to its unique properties such as easy construction, quick drying of the coating film, and good weather resistance, nitro coatings are currently widely used in the fields of plastics, leather, fabrics, and furniture. In the field of leather technology, nitrocellulose emulsion as a nitro coating is mainly used for isolating the intermediate layer and topcoating varnish. It has the advantages of complete film formation, fast drying speed, good permeability, and convenient use. used in large quantities. We know that nitrocellulose emulsion is to dissolve nitrocellulose, organic solvent and plasticizer into oil phase, and then disperse the oil phase in the water phase through emu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D101/18C09D191/00C09D191/06C09D7/63C09D7/65
CPCC09D101/18C09D7/63C09D7/65C08L2205/035C08L2205/03C08L91/00C08L91/06C08L23/12C08K5/12C08K5/11
Inventor 胡新华
Owner 成都市彭州铭众化工有限公司