阅读说明：本技术 一种皮革鞣剂的制备方法 (Preparation method of leather tanning agent ) 是由 陈治军 邵文 魏崇远 于 2019-09-25 设计创作，主要内容包括：本发明涉及皮革加工试剂技术领域,尤其是一种皮革鞣剂的制备方法,所述皮革鞣剂的质量份组成如下：聚醚二元醇支链丙烯酸树脂32-36份、柠檬酸钠2-5份、改性氧化石墨烯6-12份、乙二醛接枝改性淀粉2-6份、三乙醇胺3-6份、重铬酸钠2-6份、乙酸乙酯10-20份、硝酸1.2-3.6份、磺酸钠1-2份、去离子水50-60份；本发明种的皮革鞣剂的制备方法,生产工艺简单,成本低,生产工艺环保,采用本发明中制备得到的皮革鞣剂,制备的皮革表面丰满,手感好,二醛添加量少,从而可以有效降低皮革的生产工艺。(The invention relates to the technical field of leather processing reagents, in particular to a preparation method of a leather tanning agent, which comprises the following components in parts by mass: 32-36 parts of polyether glycol branched acrylic resin, 2-5 parts of sodium citrate, 6-12 parts of modified graphene oxide, 2-6 parts of glyoxal grafted modified starch, 3-6 parts of triethanolamine, 2-6 parts of sodium dichromate, 10-20 parts of ethyl acetate, 1.2-3.6 parts of nitric acid, 1-2 parts of sodium sulfonate and 50-60 parts of deionized water; the preparation method of the leather tanning agent has the advantages of simple production process, low cost and environment-friendly production process, and the leather prepared by the leather tanning agent has a plump surface, good hand feeling and small addition amount of dialdehyde, so that the production process of the leather can be effectively reduced.)

1. A method for preparing a leather tanning agent is characterized by comprising the following steps: the leather tanning agent comprises the following components in parts by mass: 32-36 parts of polyether glycol branched acrylic resin, 2-5 parts of sodium citrate, 6-12 parts of modified graphene oxide, 2-6 parts of glyoxal grafted modified starch, 3-6 parts of triethanolamine, 2-6 parts of sodium dichromate, 10-20 parts of ethyl acetate, 1.2-3.6 parts of nitric acid, 1-2 parts of sodium sulfonate and 50-60 parts of deionized water.

2. A process for the preparation of a leather tanning agent according to claim 1, characterized in that: the modified graphene oxide is melamine modified graphene oxide.

3. A process for the preparation of a leather tanning agent according to claim 1, characterized in that: the leather tanning agent comprises the following components in parts by mass: 33-35 parts of polyether glycol branched acrylic resin, 2.5-4.5 parts of sodium citrate, 7-11 parts of modified graphene oxide, 3-5 parts of glyoxal grafted modified starch, 3.2-5 parts of triethanolamine, 3-5 parts of sodium dichromate, 12-18 parts of ethyl acetate, 1.5-3.2 parts of nitric acid, 1.2-1.8 parts of sodium sulfonate and 50-60 parts of deionized water.

4. A process for the preparation of a leather tanning agent according to claim 1, characterized in that: the leather tanning agent comprises the following components in parts by mass: 343 parts of polyether glycol branched acrylic resin, 3.5 parts of sodium citrate, 9 parts of modified graphene oxide, 4 parts of glyoxal grafted modified starch, 4 parts of triethanolamine, 4 parts of sodium dichromate, 15 parts of ethyl acetate, 2.5 parts of nitric acid, 1.5 parts of sodium sulfonate and 55 parts of deionized water.

5. A process for the preparation of a leather tanning agent according to claim 1, characterized in that: the preparation method comprises the following steps: adding 32-36 parts of polyether glycol branched acrylic resin, 2-5 parts of sodium citrate, 6-12 parts of modified graphene oxide, 2-6 parts of glyoxal grafted modified starch, 3-6 parts of triethanolamine, 2-6 parts of sodium dichromate, 10-20 parts of ethyl acetate, 1.2-3.6 parts of nitric acid, 1-2 parts of sodium sulfonate and 50-60 parts of deionized water into a stirrer, and uniformly mixing and stirring to obtain the leather tanning agent.

6. A method of preparing a leather tanning agent according to claim 5, characterized in that: the stirring temperature of the mixing and stirring is room temperature.

7. A method of preparing a leather tanning agent according to claim 5, characterized in that: the mixing and stirring time is 40-60 min.

8. A method of preparing a leather tanning agent according to claim 5, characterized in that: the stirring speed of the mixing stirring is as follows: stirring at 200r/min for 5-10min, then at 400r/min for 20-30min, and finally at 800r/min until stirring uniformly.

Technical Field

The invention relates to the technical field of leather processing reagents, in particular to a preparation method of a leather tanning agent.

Background

The tanning agent is an active substance with multiple functional groups, and the molecular structure of the active substance at least contains two or more functional groups. The tanning agent can form intramolecular bonds with two or more action points in a collagen structure, can destroy a part of intramolecular bonds in the collagen and generate more new intermolecular crosslinks, and has a tanning effect. Tanning agents can be divided into inorganic tanning agents and organic tanning agents by chemical nature. The inorganic tanning agent is mainly a mineral tanning compound. Organic tanning agents can be classified into vegetable tanning agents, aldehyde tanning agents, oil tanning agents, synthetic tanning agents, resin tanning agents, and the like.

The tanning agent is added with an automatic alkalizing material. In order to save chromium salts, multi-metal complex tanning agents have been developed. Aluminum salt is not suitable for use alone, but is valued for its ability to reduce pollution by combining with acrylic complexes and with vegetable tanning agents. Vegetable tanning agents have also been modified by modification or grafting with acrylic compounds to improve tanning. China is cultivating excellent plant tanning materials (such as wattle bark) to overcome the shortage of the condensation tanning agent. In addition, the basic materials with tanning properties are being searched for in many ways internationally, and a way is opened up for developing novel synthetic tanning agents.

Disclosure of Invention

The purpose of the invention is: overcomes the defects in the prior art, and provides a preparation method of the leather tanning agent with low production cost and simple production process.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the preparation method of the leather tanning agent comprises the following steps: 32-36 parts of polyether glycol branched acrylic resin, 2-5 parts of sodium citrate, 6-12 parts of modified graphene oxide, 2-6 parts of glyoxal grafted modified starch, 3-6 parts of triethanolamine, 2-6 parts of sodium dichromate, 10-20 parts of ethyl acetate, 1.2-3.6 parts of nitric acid, 1-2 parts of sodium sulfonate and 50-60 parts of deionized water.

Further, the modified graphene oxide is melamine modified graphene oxide.

Further, the leather tanning agent comprises the following components in parts by mass: 33-35 parts of polyether glycol branched acrylic resin, 2.5-4.5 parts of sodium citrate, 7-11 parts of modified graphene oxide, 3-5 parts of glyoxal grafted modified starch, 3.2-5 parts of triethanolamine, 3-5 parts of sodium dichromate, 12-18 parts of ethyl acetate, 1.5-3.2 parts of nitric acid, 1.2-1.8 parts of sodium sulfonate and 50-60 parts of deionized water.

Further, the leather tanning agent comprises the following components in parts by mass: 343 parts of polyether glycol branched acrylic resin, 3.5 parts of sodium citrate, 9 parts of modified graphene oxide, 4 parts of glyoxal grafted modified starch, 4 parts of triethanolamine, 4 parts of sodium dichromate, 15 parts of ethyl acetate, 2.5 parts of nitric acid, 1.5 parts of sodium sulfonate and 55 parts of deionized water.

Further, the preparation method comprises the following steps: adding 32-36 parts of polyether glycol branched acrylic resin, 2-5 parts of sodium citrate, 6-12 parts of modified graphene oxide, 2-6 parts of glyoxal grafted modified starch, 3-6 parts of triethanolamine, 2-6 parts of sodium dichromate, 10-20 parts of ethyl acetate, 1.2-3.6 parts of nitric acid, 1-2 parts of sodium sulfonate and 50-60 parts of deionized water into a stirrer, and uniformly mixing and stirring to obtain the leather tanning agent.

Further, the stirring temperature of the mixing and stirring is room temperature.

Further, the mixing and stirring time is 40-60 min.

Further, the stirring speed of the mixing stirring is as follows: stirring at 200r/min for 5-10min, then at 400r/min for 20-30min, and finally at 800r/min until stirring uniformly.

The technical scheme adopted by the invention has the beneficial effects that:

the preparation method of the leather tanning agent has the advantages of simple production process, low cost and environment-friendly production process, and the leather prepared by the leather tanning agent has a plump surface, good hand feeling and small addition amount of dialdehyde, so that the production process of the leather can be effectively reduced.

Detailed Description

The invention will now be further illustrated with reference to specific examples.

Example 1

The preparation method of the leather tanning agent comprises the following steps: 32 parts of polyether glycol branched acrylic resin, 2 parts of sodium citrate, 6 parts of modified graphene oxide, 2 parts of glyoxal grafted modified starch, 3 parts of triethanolamine, 2 parts of sodium dichromate, 10 parts of ethyl acetate, 1.2 parts of nitric acid, 1 part of sodium sulfonate and 50 parts of deionized water.

The modified graphene oxide is melamine modified graphene oxide.

The preparation method comprises the following steps: adding 32 parts of polyether glycol branched acrylic resin, 2 parts of sodium citrate, 6 parts of modified graphene oxide, 2 parts of glyoxal grafted modified starch, 3 parts of triethanolamine, 2 parts of sodium dichromate, 10 parts of ethyl acetate, 1.2 parts of nitric acid, 1 part of sodium sulfonate and 50 parts of deionized water into a stirring machine, uniformly mixing and stirring to obtain the leather tanning agent, wherein the stirring temperature of mixing and stirring is room temperature, the stirring time of mixing and stirring is 40-60min, and the stirring speed of mixing and stirring is as follows: stirring at 200r/min for 5-10min, then at 400r/min for 20-30min, and finally at 800r/min until stirring uniformly.

Example 2

The preparation method of the leather tanning agent comprises the following steps: 33 parts of polyether glycol branched acrylic resin, 2.5 parts of sodium citrate, 7 parts of modified graphene oxide, 3 parts of glyoxal grafted modified starch, 3.2 parts of triethanolamine, 3 parts of sodium dichromate, 12 parts of ethyl acetate, 1.5 parts of nitric acid, 1.2 parts of sodium sulfonate and 50 parts of deionized water.

The modified graphene oxide is melamine modified graphene oxide.

The preparation method comprises the following steps: adding 33 parts of polyether glycol branched acrylic resin, 2.5 parts of sodium citrate, 7 parts of modified graphene oxide, 3 parts of glyoxal grafted modified starch, 3.2 parts of triethanolamine, 3 parts of sodium dichromate, 12 parts of ethyl acetate, 1.5 parts of nitric acid, 1.2 parts of sodium sulfonate and 50 parts of deionized water into a stirring machine, uniformly mixing and stirring to obtain the leather tanning agent, wherein the mixing and stirring temperature is room temperature, the mixing and stirring time is 40-60min, and the mixing and stirring speed is as follows: stirring at 200r/min for 5-10min, then at 400r/min for 20-30min, and finally at 800r/min until stirring uniformly.

Example 3

The preparation method of the leather tanning agent comprises the following steps: 343 parts of polyether glycol branched acrylic resin, 3.5 parts of sodium citrate, 9 parts of modified graphene oxide, 4 parts of glyoxal grafted modified starch, 4 parts of triethanolamine, 4 parts of sodium dichromate, 15 parts of ethyl acetate, 2.5 parts of nitric acid, 1.5 parts of sodium sulfonate and 55 parts of deionized water.

The modified graphene oxide is melamine modified graphene oxide.

The preparation method comprises the following steps: adding 343 parts of polyether glycol branched acrylic resin, 3.5 parts of sodium citrate, 9 parts of modified graphene oxide, 4 parts of glyoxal grafted modified starch, 4 parts of triethanolamine, 4 parts of sodium dichromate, 15 parts of ethyl acetate, 2.5 parts of nitric acid, 1.5 parts of sodium sulfonate and 55 parts of deionized water into a stirrer, and uniformly mixing and stirring to obtain the leather tanning agent, wherein the mixing and stirring temperature is room temperature, the mixing and stirring time is 40-60min, and the mixing and stirring speed is as follows: stirring at 200r/min for 5-10min, then at 400r/min for 20-30min, and finally at 800r/min until stirring uniformly.

Example 4

The preparation method of the leather tanning agent comprises the following steps: 35 parts of polyether glycol branched acrylic resin, 4.5 parts of sodium citrate, 11 parts of modified graphene oxide, 5 parts of glyoxal grafted modified starch, 5 parts of triethanolamine, 5 parts of sodium dichromate, 18 parts of ethyl acetate, 2 parts of nitric acid, 1.8 parts of sodium sulfonate and 60 parts of deionized water.

The modified graphene oxide is melamine modified graphene oxide.

The preparation method comprises the following steps: adding 35 parts of polyether glycol branched acrylic resin, 4.5 parts of sodium citrate, 11 parts of modified graphene oxide, 5 parts of glyoxal grafted modified starch, 5 parts of triethanolamine, 5 parts of sodium dichromate, 18 parts of ethyl acetate, 2 parts of nitric acid, 1.8 parts of sodium sulfonate and 60 parts of deionized water into a stirrer, and uniformly mixing and stirring to obtain the leather tanning agent, wherein the mixing and stirring temperature is room temperature, the mixing and stirring time is 40-60min, and the mixing and stirring speed is as follows: stirring at 200r/min for 5-10min, then at 400r/min for 20-30min, and finally at 800r/min until stirring uniformly.

Example 5

The preparation method of the leather tanning agent comprises the following steps: 36 parts of polyether glycol branched acrylic resin, 5 parts of sodium citrate, 12 parts of modified graphene oxide, 6 parts of glyoxal grafted modified starch, 6 parts of triethanolamine, 6 parts of sodium dichromate, 20 parts of ethyl acetate, 3.6 parts of nitric acid, 2 parts of sodium sulfonate and 60 parts of deionized water.

The modified graphene oxide is melamine modified graphene oxide.

The preparation method comprises the following steps: adding 36 parts of polyether glycol branched acrylic resin, 5 parts of sodium citrate, 12 parts of modified graphene oxide, 6 parts of glyoxal grafted modified starch, 6 parts of triethanolamine, 6 parts of sodium dichromate, 20 parts of ethyl acetate, 3.6 parts of nitric acid, 2 parts of sodium sulfonate and 60 parts of deionized water into a stirring machine, uniformly mixing and stirring to obtain the leather tanning agent, wherein the stirring temperature of mixing and stirring is room temperature, the stirring time of mixing and stirring is 40-60min, and the stirring speed of mixing and stirring is as follows: stirring at 200r/min for 5-10min, then at 400r/min for 20-30min, and finally at 800r/min until stirring uniformly.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.