阅读说明：本技术 一种皮革防霉剂及其制备方法 (Leather mildew preventive and preparation method thereof ) 是由 黄炎洪 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种皮革防霉剂及其制备方法。本发明的皮革防霉剂由以下质量百分比的组分组成：噻苯咪唑：1％～5％；棉隆：5％～15％；2-正辛基-4-异噻唑啉-3-酮：5％～20％；乳化剂：8％～30％；助溶剂：10％～30％；水：余量。本发明的皮革防霉剂的制备方法简单,分批将各组分混合均匀即可。本发明将噻苯咪唑、棉隆和2-正辛基-4-异噻唑啉-3-酮这三种毒性低的活性成分进行复配,三者协同作用,得到的皮革防霉剂抑菌谱广、不易产生耐药性,且棉隆还可以杀灭虫卵和螨虫,进而可以有效避免蓝湿皮在仓储过程中出现大面积长霉,降低了制革企业防霉的工艺成本,适合用在大用量的制革行业。(The invention discloses a leather mildew preventive and a preparation method thereof. The leather mildew preventive disclosed by the invention comprises the following components in percentage by mass: thiabendazole: 1% -5%; and (2) bloom: 5% -15%; 2-n-octyl-4-isothiazolin-3-one: 5% -20%; emulsifier: 8 to 30 percent; cosolvent: 10% -30%; water: and (4) the balance. The leather mildew preventive is simple in preparation method and can be prepared by uniformly mixing the components in batches. According to the invention, the thiabendazole, the dazomet and the 2-n-octyl-4-isothiazolin-3-one which are low in toxicity are compounded, and the three active ingredients have synergistic effect, so that the obtained leather mildew preventive is wide in bacteriostatic spectrum and not easy to generate drug resistance, and the dazomet can kill worm eggs and mites, so that large-area mildew growth of wet blue leather in a storage process can be effectively avoided, the mildew-proof process cost of a tanning enterprise is reduced, and the leather mildew preventive is suitable for being used in a large-dosage tanning industry.)

1. A leather mildew preventive is characterized in that: the composite material comprises the following components in percentage by mass:

thiabendazole: 1% -5%;

and (2) bloom: 5% -15%;

2-n-octyl-4-isothiazolin-3-one: 5% -20%;

emulsifier: 8 to 30 percent;

cosolvent: 10% -30%;

water: and (4) the balance.

2. The leather mildewcide of claim 1, wherein: the composite material comprises the following components in percentage by mass:

thiabendazole: 1% -3%;

and (2) bloom: 8% -10%;

2-n-octyl-4-isothiazolin-3-one: 5% -15%;

emulsifier: 10% -25%;

cosolvent: 10% -30%;

water: and (4) the balance.

3. The leather mildewcide according to claim 1 or 2, wherein: the emulsifier is at least one of fatty alcohol-polyoxyethylene ether, fatty acid-polyoxyethylene ether, polyoxyethylene-polyoxypropylene block copolymer, fatty alcohol-polyoxyethylene ether phosphate and polyoxyethylene sorbitan monostearate.

4. The leather mildewcide according to claim 3, wherein: the emulsifier is prepared from fatty alcohol-polyoxyethylene ether and tween-60 in a mass ratio of 1: (0.2-2).

5. The leather mildewcide according to claim 1 or 2, wherein: the cosolvent is at least one of alcohol solvents and alcohol ether solvents.

6. The leather mildewcide according to claim 5, wherein: the cosolvent is at least one of dipropylene glycol, tripropylene glycol, diethylene glycol monobutyl ether, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether and ethylene glycol monoethyl ether.

7. A method for preparing a leather mildewcide according to any one of claims 1 to 6, wherein the steps of: the method comprises the following steps:

1) adding the dazomet, the thiabendazole, the cosolvent and the water into a stirrer, and stirring;

2) adding 2-n-octyl-4-isothiazolin-3-one and an emulsifier into a stirrer, and stirring;

3) and transferring the materials in the stirrer into a shearing emulsifying machine, and shearing and emulsifying to obtain the leather mildew preventive.

8. The method of claim 7, wherein: the rotating speed of the stirrer during stirring in the step 1) is 2000-3000 r/min, and the stirring time is 5-10 min.

9. The production method according to claim 7 or 8, characterized in that: the rotating speed of the stirrer during stirring in the step 2) is 2000-3000 r/min, and the stirring time is 8-10 min.

10. The production method according to claim 7 or 8, characterized in that: the rotating speed of the shearing emulsifying machine in the shearing emulsifying in the step 3) is 8000-9000 r/min, and the time is 20-30 min.

Technical Field

The invention relates to a leather mildew preventive and a preparation method thereof, belonging to the technical field of mildew preventive and bactericide.

Background

The leather product is visible everywhere in daily life of people, is deeply loved by wide consumers, and promotes the rapid development of leather-making enterprises. However, leather mildew growth has been a troublesome problem for leather manufacturers, and many methods for preventing leather mildew exist, and the most effective and commonly used method is to use a leather mildew inhibitor. In recent years, under the influence of environmental protection factors, a plurality of traditional leather mildew preventives (such as halogenated phenol mildew preventives, aldehyde mildew preventives and the like) are forbidden to be used, while the emerging inorganic nano mildew preventives have good mildew-proof effect, but have high use cost and are not suitable for being used in the tanning industry with large use amount.

At present, the mildew preventive commonly used in the industry is 2-thiocyanomethyl-thiobenzothiazole (TCMTB), which is a high-efficiency environment-friendly mildew preventive, but because the mildew preventive is used in the industry for a long time, the drug resistance of fungi is stronger and stronger, the mildew preventive effect of the mildew preventive is greatly reduced, and the actual requirements are difficult to meet again. The high-efficiency low-toxicity mildew inhibitor is the mainstream direction of the current international sterilization and mildew-proof research, the heterocyclic compound mildew inhibitor has low toxicity and good mildew-proof effect, and is widely applied in recent years, but the mildew-proof effect of the mildew inhibitor on partial mildew is not ideal enough, and the actual requirement is difficult to meet.

Therefore, there is a need to develop a leather mildew inhibitor with low toxicity, broad antibacterial spectrum and low drug resistance.

Disclosure of Invention

The invention aims to provide a leather mildew preventive and a preparation method thereof.

The technical scheme adopted by the invention is as follows:

a leather mildew preventive comprises the following components in percentage by mass:

thiabendazole: 1% -5%;

and (2) bloom: 5% -15%;

2-n-octyl-4-isothiazolin-3-one: 5% -20%;

emulsifier: 8 to 30 percent;

cosolvent: 10% -30%;

water: and (4) the balance.

Preferably, the leather mildew preventive comprises the following components in percentage by mass:

thiabendazole: 1% -3%;

and (2) bloom: 8% -10%;

2-n-octyl-4-isothiazolin-3-one: 5% -15%;

emulsifier: 10% -25%;

cosolvent: 10% -30%;

water: and (4) the balance.

Preferably, the emulsifier is at least one of fatty alcohol-polyoxyethylene ether, fatty acid-polyoxyethylene ether, polyoxyethylene-polyoxypropylene block copolymer, fatty alcohol-polyoxyethylene ether phosphate and polyoxyethylene sorbitan monostearate.

Further preferably, the emulsifier is prepared from fatty alcohol-polyoxyethylene ether and tween-60 according to a mass ratio of 1: (0.2-2).

Preferably, the cosolvent is at least one of an alcohol solvent and an alcohol ether solvent.

More preferably, the cosolvent is at least one of dipropylene glycol, tripropylene glycol, diethylene glycol monobutyl ether, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and ethylene glycol monoethyl ether.

Still more preferably, the co-solvent is dipropylene glycol.

The preparation method of the leather mildew preventive comprises the following steps:

1) adding the dazomet, the thiabendazole, the cosolvent and the water into a stirrer, and stirring;

2) adding 2-n-octyl-4-isothiazolin-3-one and an emulsifier into a stirrer, and stirring;

3) and transferring the materials in the stirrer into a shearing emulsifying machine, and shearing and emulsifying to obtain the leather mildew preventive.

Preferably, the rotating speed of the stirrer during stirring in the step 1) is 2000-3000 r/min, and the stirring time is 5-10 min.

Preferably, the rotating speed of the stirrer during stirring in the step 2) is 2000-3000 r/min, and the stirring time is 8-10 min.

Preferably, the rotating speed of the shearing emulsifying machine in the shearing emulsification in the step 3) is 8000-9000 r/min, and the time is 20-30 min.

The invention has the beneficial effects that: according to the invention, the thiabendazole, the dazomet and the 2-n-octyl-4-isothiazolin-3-one which are low in toxicity are compounded, and the three active ingredients have synergistic effect, so that the obtained leather mildew preventive is wide in bacteriostatic spectrum and not easy to generate drug resistance, and the dazomet can kill worm eggs and mites, so that large-area mildew growth of wet blue leather in a storage process can be effectively avoided, the mildew-proof process cost of a tanning enterprise is reduced, and the leather mildew preventive is suitable for being used in a large-dosage tanning industry.

Drawings

FIG. 1 is a photograph showing the mildewproof effect of the leather mildewcide according to examples 1 to 3 and comparative examples 1 to 4.

Detailed Description

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