阅读说明：本技术 一种防锈脂 (Antirust grease ) 是由 胡颖妮 胡湘仲 喻宁亚 胡伟民 苏胜培 于 2019-08-23 设计创作，主要内容包括：本发明中的防锈脂,包括25-35份基础油、3-4份硫代二丙酸双月桂酯、13-15份氢氧化钙、2-3份二苯基甲烷二异氰酸酯、1-2份聚甲基丙烯酸酯、3-5份羊毛脂、20-30份石油脂和3-6份无定形二氧化硅防锈填料；其中,基础油为15#白油。该填料均匀地分散与防锈脂中,能够在金属制品表面形成致密的钝化保护膜,阻隔外界的空气、水与金属制品接触,进而增强防锈脂的防锈性能。其次,本发明中的防锈脂各成分相互协同作用,使得该保护膜能够稳定地附着于金属制品的表面,从而延长了防锈脂的使用周期,有效地防止了金属制品生锈。(The antirust grease comprises 25-35 parts of base oil, 3-4 parts of dilauryl thiodipropionate, 13-15 parts of calcium hydroxide, 2-3 parts of diphenylmethane diisocyanate, 1-2 parts of polymethacrylate, 3-5 parts of lanolin, 20-30 parts of petroleum grease and 3-6 parts of amorphous silica antirust filler; wherein the base oil is 15# white oil. The filler is uniformly dispersed in the antirust grease, a compact passivation protective film can be formed on the surface of a metal product, and the contact of outside air and water with the metal product is blocked, so that the antirust performance of the antirust grease is enhanced. Secondly, the components of the anti-rust grease in the invention are mutually cooperated, so that the protective film can be stably attached to the surface of the metal product, thereby prolonging the service cycle of the anti-rust grease and effectively preventing the metal product from rusting.)

1. An antirust grease, which is characterized in that: the antirust oil comprises 25-35 parts of base oil, 3-4 parts of dilauryl thiodipropionate, 13-15 parts of calcium hydroxide, 2-3 parts of diphenylmethane diisocyanate, 1-2 parts of polymethacrylate, 3-5 parts of lanolin, 20-30 parts of petroleum fat and 3-6 parts of amorphous silica antirust filler; wherein the base oil is 15# white oil.

2. The rust inhibitive grease according to claim 1, characterized in that: the antirust oil comprises 30 parts of base oil, 3.5 parts of dilauryl thiodipropionate, 14 parts of calcium hydroxide, 2.5 parts of diphenylmethane diisocyanate, 1.1 parts of polymethacrylate, 4 parts of lanolin, 25 parts of petroleum fat and 6 parts of amorphous silica antirust filler; wherein the base oil is 15# white oil.

3. The rust inhibitive grease according to claim 1, characterized in that: the preparation method of the amorphous silica antirust filler comprises the following steps:

1) preparing materials: preparing a water glass solution with the silicon dioxide content of 5-25 wt%, and preparing a sulfuric acid solution with the concentration of 10-50 wt%;

2) synthesizing: adding a sulfuric acid solution into the reaction kettle, and adding a water glass solution to adjust the pH value of the system to 1-4; standing for 30-120 minutes after uniform stirring, wherein the reaction temperature is 30-60 ℃; after standing, adjusting the pH value of the mixed solution to 6-8, simultaneously heating to 70-100 ℃, and keeping for 10-120 minutes;

3) adjusting the pH value of the system to 2-4, and keeping for 20 minutes;

4) filtering and washing the reaction product, adding alcohol amine or micromolecular alcohol after filtering and washing, and then carrying out spray drying and crushing.

4. The rust inhibitive grease according to claim 3, characterized in that: the preparation method of the amorphous silica antirust filler comprises the following steps:

1) preparing materials: preparing a water glass solution with the silicon dioxide content of 20 wt%, and preparing a sulfuric acid solution with the concentration of 30 wt%;

2) synthesizing: adding a sulfuric acid solution into the reaction kettle, and then adding a water glass solution to adjust the pH value of the system to 1.5; the time for adding the water glass solution is 30 minutes; standing for 90 minutes after uniform stirring, wherein the reaction temperature is 50 ℃; after standing, adjusting the pH value of the mixed solution to 8, simultaneously heating to 90 ℃, and keeping for 30 minutes;

3) adjusting the pH value of the system to 3.5, and keeping for 20 minutes;

4) filtering and washing the reaction product, adding alcohol amine or micromolecular alcohol after filtering and washing, and then carrying out spray drying and crushing.

5. The rust inhibitive grease according to claim 3, characterized in that: in the step 4), the reaction product is filtered and washed until the conductivity is less than 50 mu S/cm.

6. The rust inhibitive grease according to claim 3, characterized in that: and the outlet temperature of spray drying is 110-150 ℃, and the amorphous silicon dioxide antirust filler is crushed to 2-4 mu m.

7. The rust inhibitive grease according to claim 3, characterized in that: the method comprises the following steps: in the step 4), filtering and washing, and then adding alcohol amine; wherein, the alcohol amine is one or two of ethanolamine or 6-amino-1-hexanol.

8. The rust inhibitive grease according to claim 7, wherein: in the step 4), the weight ratio of the silicon dioxide to the alcohol amine is 100: (1-5).

9. The rust inhibitive grease according to claim 3, characterized in that: in the step 4), adding small molecular alcohol after filtering and washing; wherein the small molecular alcohol is one or more than two of small molecular polyols.

10. The rust inhibitive grease according to claim 9, characterized in that: in the step 4), the weight ratio of the silicon dioxide to the small molecular alcohol is 100: (1-5).

Technical Field

The invention relates to the technical field of metal rust prevention, in particular to rust-proof grease.

Background

In the technical field of metal rust prevention, users generally adopt rust preventive oil or rust preventive grease. Because the antirust oil is in a liquid state, the spraying can be uneven; and a large amount of oil may not be drained during packaging, so that places with much oil are easy to corrode. In contrast, the rust preventive grease is a paste prepared by adding a rust preventive additive to a base oil of petroleum wax such as industrial vaseline, paraffin, ceresin, etc.; convenient operation and low cost, and is an ideal antirust product. However, the existing antirust grease has the problems of poor antirust effect, short service cycle and the like, and the general grease can be seriously corroded in three to seven days in a salt spray test.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention has the following objects: provided is a rust-preventive grease which has good rust-preventive properties and a long life cycle and can prevent metal products from rusting well.

The purpose of the invention is realized by adopting the following technical scheme:

an antirust grease comprises 25-35 parts of base oil, 3-4 parts of dilauryl thiodipropionate, 13-15 parts of calcium hydroxide, 2-3 parts of diphenylmethane diisocyanate, 1-2 parts of polymethacrylate, 3-5 parts of lanolin, 20-30 parts of petroleum grease and 3-6 parts of amorphous silica antirust filler; wherein the base oil is 15# white oil.

Further, 30 parts of base oil, 3.5 parts of dilauryl thiodipropionate, 14 parts of calcium hydroxide, 2.5 parts of diphenylmethane diisocyanate, 1.1 parts of polymethacrylate, 4 parts of lanolin, 25 parts of petroleum jelly and 6 parts of amorphous silica antirust filler; wherein the base oil is 15# white oil.

Further, the preparation method of the amorphous silica antirust filler comprises the following steps:

1) preparing materials: preparing a water glass solution with the silicon dioxide content of 5-25 wt%, and preparing a sulfuric acid solution with the concentration of 10-50 wt%;

2) synthesizing: adding a sulfuric acid solution into the reaction kettle, and adding a water glass solution to adjust the pH value of the system to 1-4; standing for 30-120 minutes after uniform stirring, wherein the reaction temperature is 30-60 ℃; after standing, adjusting the pH value of the mixed solution to 6-8, simultaneously heating to 70-100 ℃, and keeping for 10-120 minutes;

3) adjusting the pH value of the system to 2-4, and keeping for 20 minutes;

4) filtering and washing the reaction product, adding alcohol amine or micromolecular alcohol after filtering and washing, and then carrying out spray drying and crushing.

Further, the preparation method of the amorphous silica antirust filler comprises the following steps:

1) preparing materials: preparing a water glass solution with the silicon dioxide content of 20 wt%, and preparing a sulfuric acid solution with the concentration of 30 wt%;

2) synthesizing: adding a sulfuric acid solution into the reaction kettle, and then adding a water glass solution to adjust the pH value of the system to 1.5; the time for adding the water glass solution is 30 minutes; standing for 90 minutes after uniform stirring, wherein the reaction temperature is 50 ℃; after standing, adjusting the pH value of the mixed solution to 8, simultaneously heating to 90 ℃, and keeping for 30 minutes;

3) adjusting the pH value of the system to 3.5, and keeping for 20 minutes;

4) filtering and washing the reaction product, adding alcohol amine or micromolecular alcohol after filtering and washing, and then carrying out spray drying and crushing.

Further, in step 4), the reaction product is filtered and washed to a conductivity of < 50. mu.S/cm.

Further, the outlet temperature of spray drying is 110-150 ℃, and the amorphous silicon dioxide antirust filler is crushed to 2-4 mu m.

Further, comprising: in the step 4), filtering and washing, and then adding alcohol amine; wherein, the alcohol amine is one or two of ethanolamine or 6-amino-1-hexanol.

Further, in the step 4), the weight ratio of the silicon dioxide to the alcohol amine is 100: (1-5).

Further, in the step 4), small molecular alcohol is added after filtration and washing; wherein the small molecular alcohol is one or more than two of small molecular polyols.

Further, in the step 4), the weight ratio of the silicon dioxide to the small molecular alcohol is 100: (1-5).

Compared with the prior art, the invention has the beneficial effects that:

the invention adds amorphous silicon dioxide antirust filler into antirust grease. The filler is uniformly dispersed in the antirust grease, on one hand, the filler can adsorb attack ions and delay the generation of anode ferrous or iron ions; on the other hand, silica dissociates under alkaline conditions, releasing silicate ions. When the cathode reacts and the area becomes more alkaline, hydroxide ions are consumed and silicate ions are released. The silicate ions and ferrous ions or iron ions generate insoluble silicate to cover the surfaces of the cathode and the anode, so that a compact passivation protective film is formed on the surface of the metal product to prevent outside air and water from contacting the metal product, and the antirust performance of the antirust grease is enhanced. Secondly, the components of the anti-rust grease in the invention are mutually cooperated, so that the protective film can be stably attached to the surface of the metal product, thereby prolonging the service cycle of the anti-rust grease and effectively preventing the metal product from rusting.

Detailed Description

The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment. The materials used in this example are all commercially available.

Comparative example 1:

an antirust grease comprises 30 parts of base oil, 3.5 parts of dilauryl thiodipropionate, 14 parts of calcium hydroxide, 2.5 parts of diphenylmethane diisocyanate, 1.1 parts of polymethacrylate, 4 parts of lanolin, 25 parts of petroleum grease and 6 parts of amorphous silica antirust filler; wherein the base oil is 15# white oil.

Among them, the amorphous silica rust inhibitive filler of comparative example 1 was prepared by the following method:

5000 grams of 10 weight percent sulfuric acid solution is added into the reaction kettle, and then 25 weight percent water glass solution is added to adjust the pH value of the system to 1.5; the time for adding the water glass solution is 120 minutes; standing for 30 minutes after uniform stirring, wherein the reaction temperature is 30 ℃; after standing, adjusting the pH value of the mixed solution to 6 by using a 10% sodium hydroxide solution, simultaneously heating to 100 ℃, and keeping the temperature for 120 minutes; adjusting the pH value of the system to 2 by using a 10% sulfuric acid solution, and keeping the pH value for 20 minutes; the reaction product is filtered and washed until the conductivity is less than 50 mu S/cm, the temperature of a spray drying outlet is 150 ℃, and the reaction product is crushed to 2 mu m.

The physicochemical properties are shown in table 1:

TABLE 1

Index of serial number	Oil absorption value g/g	Pore volume ml/g	Square meter with specific surface area per gram
				Comparative examples 1 to 1	1.12	1.28	482
Comparative examples 1 to 2	1.09	1.27	468
				Comparative examples 1 to 3	1.14	1.26	487
Comparative examples 1 to 4	1.07	1.19	466
				Comparative examples 1 to 5	1.15	1.30	458