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Mixed solvent used for dissolving nitrated cellulose and nitrated cellulose product containing mixed solvent

A nitrocellulose and mixed solvent technology, used in fiber treatment, textiles and papermaking, etc., can solve the problems of long residence time on the leather surface, damage to the environment by operators, and strong solvent odor, achieve good dissolution effect, improve physical properties, The effect of high emulsion stability

Active Publication Date: 2013-06-19
德瑞(常州)特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, in view of the current situation that the solvent used in the nitrocellulose brightener in the existing leather industry has a large odor and strong toxicity, and has a long residence time on the leather surface, which is harmful to the operator and is not environmentally friendly, it is necessary to develop a solvent for Low-odor, low-toxicity solvent system for dissolving nitrocellulose

Method used

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  • Mixed solvent used for dissolving nitrated cellulose and nitrated cellulose product containing mixed solvent
  • Mixed solvent used for dissolving nitrated cellulose and nitrated cellulose product containing mixed solvent
  • Mixed solvent used for dissolving nitrated cellulose and nitrated cellulose product containing mixed solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The diethyl succinate of 100g, the acetyl tributyl citrate of 100g, the diethylene glycol butyl ether acetate of 300g and the glyceryl triacetate of 150g are placed in a 1L round-bottomed flask, and they are mixed uniformly to obtain Mixed solvents for preparing water-soluble nitrocellulose products. Then add 100 g of nitrocellulose (NC1 / 2ww, Luzhou North Nitrocellulose Co., Ltd., 1 / 2 second water-based nitrocellulose) to the resulting mixed solvent and stir until completely dissolved. Since the raw materials required for the preparation of the product are all inflammable and explosive products, the temperature should be kept as low as possible during the preparation process. No heating is required during stirring, and the ambient temperature during stirring should not exceed 30°C. Next, 20 g of emulsifier Meltiso 13120 (manufactured by Nanjing SASOL Co., Ltd.) and 230 g of water were added to the obtained mixed solution, and stirred for 1.5 hours to form a stable emul...

Embodiment 2-3

[0051] Except that the amount of diethyl succinate, acetyl tributyl citrate, diethylene glycol butyl ether acetate and glycerol triacetate is different and the time of stirring is different, prepare Example 2 with the same method as Example 1 -3 water-soluble nitrocellulose products.

Embodiment 4

[0053]50 g of diethyl succinate, 150 g of acetyl tributyl citrate, 300 g of diethylene glycol butyl ether acetate, 100 g of triacetin, and 20 g of propylene glycol adipate as a plasticizer and 30g of diethyl adipate were placed in a 1L round bottom flask, and mixed evenly to obtain a mixed solvent for preparing water-soluble nitrocellulose products. Then add 100 g of nitrocellulose (NC1 / 2ww, Luzhou North Nitrocellulose Co., Ltd., 1 / 2 second water-based nitrocellulose) to the resulting mixed solvent and stir until completely dissolved. To the resulting mixed solution, 20 g of Meltiso 13120 (Nanjing SASOL) was added as an emulsifier, and then 230 g of water was added and stirred for 2 hours to form a stable emulsion. When in use, mix the above-obtained emulsion with tap water 1:1 (v / v), stir evenly, and spray the leather with a NEW-71 type spray gun (manufactured by ANEST IWATA Company) in a spray booth (GEMATA ITALY) , The spraying amount is 2-4 g / ft. Then put the sprayed lea...

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Abstract

The invention provides a mixed solvent used for dissolving nitrated cellulose. The mixed solvent contains 1-50wt% of diethyl succinate, 10-60wt% of acetyl tributyl citrate, 10-80wt% of diethylene glycol butyl ether acetate and 1-40wt% of glycerol triacetate. The invention also provides a water-soluble nitrated cellulose product and a water-soluble nitrated cellulose product prepared by the mixed solvent provided by the invention. The nitrated cellulose product prepared by the mixed solvent is little in smell and low in toxicity, has good volatilization grade, and greatly improves the production environment of leather processing enterprises and alleviates the harm to the body health of workers on the basis of keeping the performances of the nitrated cellulose products.

Description

technical field [0001] The present invention relates to a mixed solvent system. In particular, the present invention relates to a solvent system for dissolving leather brighteners. More specifically, the present invention relates to a mixed solvent system for dissolving nitrocellulose-based brighteners for surface finishing in the tanning industry. Background technique [0002] As a leather top coating material, leather brighteners have a vital impact on the appearance, hygiene and physical-mechanical properties of leather products. At present, the types of leather brighteners mainly include casein-based brighteners, nitrocellulose-based brighteners, acrylic resin-based brighteners, polyurethane-based brighteners, and wax-containing silicon-based leather brighteners. Among them, nitrocellulose brightener is one of the more commonly used leather brighteners. [0003] The application of nitrocellulose brighteners on leather began in the 1920s and is divided into two categor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/09C08L1/18D06M15/07
Inventor 袁杰吴阳贵李靖
Owner 德瑞(常州)特种材料有限公司
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