JPH02294395A - Lubricant for plastic processing - Google Patents

Abstract

PURPOSE:To obtain the title lubricant capable of improving working environment by reducing stain around machine without being affected by contamination with other substance by encapsulating a lubricant ingredient containing a mineral oil, etc., into a microcapsule consisting of an organic high polymer material. CONSTITUTION:The aimed lubricant obtained by encapsulating (A) a lubricant ingredient containing one or more kind materials selected from a mineral oil, synthetic lubricant, oiliness improving agent and high-pressure agent into (B) a microcapsule made of an organic high molecular material such as polyamide, polyester, polyurethane, polyurea, ethylcelulose or alginic acid salt. Furthermore, an interfacial polymerization method, insitu polymerization method, in-liquid curing method, phase separation method or in-liquid drying method is exemplified as the method for encapsulating.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a lubricant for plastic working which contains lubricant components in microcapsules 14, and more specifically, it has excellent lubricity and can be used stably for a long period of time. This invention relates to a lubricant for plastic working that can improve the working environment. The present invention includes forging processing,
Used for pressing, extrusion, drawing, rolling, etc.

[Conventional technology]

Conventional lubricants for mechanical processing include mineral oils, synthetic lubricants, oiliness improvers, extreme pressure agents, etc., and lubricants are classified into water-insoluble types and water-soluble types.

[Problem to be solved by the invention]

However, although the above-mentioned water-insoluble lubricant is advantageous in terms of lubricity, it has the disadvantage that the area around the machine gets dirty easily, making it difficult to pass through the work.

On the other hand, water-soluble lubricants are advantageous in terms of improving the working environment, but the lubricant components deteriorate over time due to the influence of acids, alkalis, metal ions, etc. brought in from previous processes. However, it has the disadvantage of deterioration in quality and reduced lubricity.

The present invention overcomes the above-mentioned drawbacks, and improves the working environment by reducing dirt around machines, is unaffected by the contamination of other substances, and is a plastic material that exhibits excellent lubricity. The purpose is to provide processing lubricants.

[Means to solve the problem]

As a result of extensive research into stabilizing the components of lubricants for plastic working and developing lubricity, the present inventors solved the drawbacks of the prior art by incorporating the lubricant components into microcapsules. The present invention was completed based on the new knowledge that it is possible. That is, the plastic working lubricant of the present invention contains a lubricant component containing at least one selected from mineral oil, synthetic lubricant, oiliness improver, and extreme pressure agent.
It is characterized by being encapsulated in microcapsules made of organic polymer material.

The lubricant components usually include (a) mineral oil, and (b) one or two of synthetic lubricants and oiliness improvers;
(c) A combination of three or four types is used in combination with a pressure-curing agent. However, the invention is not limited to this, and it may be one type of synthetic lubricant, oiliness improver, or scraping agent, or a combination of two or more types, and even one type of compound among these types may be used. Alternatively, two or more types may be combined, and various selections can be made depending on the purpose, use, etc.

As the mineral oil, kerosene, light oil, spindle oil, machine oil, turbine oil, cylinder oil, liquid paraffin, etc. can be used.

Examples of the synthetic lubricant include (a) polyolefins such as polyalpha monoolefin and polybutene, (alpha) alkylene glycols, polyoxyalkylene glycols, their alkyl ethers, polyols, polyphenyl ethers, polyols such as polyol esters, etc. Ether, polyester, silicone oil, etc. can be used.

In addition, oiliness improvers broadly refer to substances that improve oiliness (lubricity), and also include substances that do not fall into the above-mentioned category. These include (a) fats and oils such as beef tallow, pork fat, rapeseed oil, coconut oil, palm oil, bran oil, and hydrogenated products of these;
Fatty acids such as stearic acid, oleic acid, lauric acid, myristic acid, and palmitic acid, esters of these fatty acids and alcohols, (iii) higher alcohols such as oleyl alcohol, aliphatic amines, and amides can be used. Examples of the alcohol to be the ester include monohydric alcohols having 1 to 22 carbon atoms, dihydric alcohols such as ethylene glycol, and polyhydric alcohols such as trimethylolpropane.

The extreme pressure agents include (a) sulfur-based extreme pressure agents such as sulfurized oils and fats, sulfurized fatty acid esters, olefin polysulfides, and dialkyl polysulfides; c) Phosphorus-based extreme pressure agents such as alkyl or allyl phosphate esters and alkyl or allyl phosphites; (2) organometallic salts such as lead naphthenate and zinc thiophosphate; and the like can be used.

In addition, commonly used rust preventive agents, antioxidants, antifoaming agents, dispersants, etc. can be used in combination with this lubricant component as necessary.

The present invention is characterized in that the lubricant component described above is included in microcapsules. Any known method can be used for this method, such as interfacial polymerization method, in-si
Examples include a tu polymerization method, an in-liquid curing method, a phase separation method, and an in-liquid drying method. Further, the organic polymer material constituting the microcapsules is not particularly limited, and varies depending on the film formation method, etc., but examples include polyamide, polyester, polyurethane, polyurea, ethyl cellulose, and alginate.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to Examples. In the Examples and Comparative Examples, "parts" are based on weight unless otherwise specified.

<<1>> Preparation Example 1 of each lubricant composition This lubricant is made by microcapsulating mineral oil or the like with polyurethane.

Mineral oil (C machine oil, kinematic viscosity at 40°C 46III12
/ SS Nippon Oil Co., Ltd.) 90 parts, alkyl polysulfide (product code rTPS-20J, Akitenu Co., Ltd.)
), 30 parts of chlorinated paraffin (product name: Empara K5
0J, carbon number 14, chlorine number 6, Ajinomoto Co., Ltd.) 3
0! , non-ionic activator (product name ``Ionet Do-6'')
00J, polyethylene glycol dioleate, Sanyo Chemical Co., Ltd. It) 151, and tolylene diisocyanate}
A mixture of 211S mixed and dissolved was dispersed in 500 parts of water while stirring at room temperature, and then a mixed solution of 302 parts of water and 12 parts of diethylenetriamine was added and stirred for 60 minutes.
A lubricant consisting of a predetermined aqueous microcapsule dispersion was obtained.

Example 2 This lubricant is made by microcapsulating mineral oil or the like with polyurethane.

90 parts of the mineral oil used in Example 1, 40 parts of chlorinated ester (trade name: Adekasizer S-3J, methyl stearate pentachloride, manufactured by Asahi Denka Co., Ltd.), trialkyl phosphite (trade name: rCHELEXTD), Triisodecyl phosphite, manufactured by Sakai Chemical Co., Ltd.) 201! 'B, Example 1
15 parts of the nonionic surfactant used in , and 22 liters of hexamethylene diisocyanane! A lubricant consisting of a predetermined microcapsule water port fluid was obtained in the same manner as in Example 1 except that glycerin was used in place of the diethylene triamine used in Example 1.

Example 3 This lubricant is made by microcapsulating rapeseed oil or the like with polyurethane.

Rapeseed oil? A mixture of 50 parts of OR, stearic acid, 30 parts of chlorinated paraffin used in Example 1, 15 parts of the same nonionic surfactant, and 2 lW& of the same tolylene diisocyanate was prepared in the same manner as in Example 1. A lubricant consisting of a predetermined aqueous microcapsule dispersion was obtained.

Comparative Example 1 This lubricant is a conventional water-insoluble lubricant that has components corresponding to those of Example 1 and is not microencapsulated.

The mineral oil, alkyl polysulfide, and chlorinated paraffin used in Example 1 were each mixed in the same proportions as in Example 1, at 300% each.
A lubricant consisting of a mixed solution was obtained by mixing and dissolving 100 parts, 100 parts, and 100 parts.

Comparative Example 2 This lubricant is a conventional water-soluble lubricant that has components corresponding to those of Example 2 and is not microencapsulated.

Mineral oil, chlorinated ester, and trialkyl phosphite used in Example 2 were mixed in the same parts as in Example 2 to make a mixed solution, and 15 parts of the nonionic activator used in Example 2 and 8 parts of water were mixed.
This mixed solution was added to an aqueous solution consisting of 35 parts and stirred to obtain a lubricant consisting of an aqueous dispersion.

Comparative Example 3 This lubricant is a conventional lubricant that has components corresponding to those of Example 3 and is not microencapsulated.

The same parts of rapeseed oil, stearic acid, chlorinated paraffin, and nonionic activator used in Example 3 are mixed to form a mixed solution, and 7 parts of potassium hydroxide and 71S of ethylene glycol are added to this mixed solution. A mixture of these was added. Next, this solution was heated to 100°C, and water at 80°C
After stirring, the mixture was cooled to obtain a lubricant consisting of a dispersion.

(2) Performance Test The following performance tests were conducted on the fresh and degraded lubricants of Examples 1 to 3 and Comparative Examples 1 to 3 obtained above. In Comparative Example 1, no deterioration liquid was prepared because the lubricant was water-insoluble. The results are shown in Tables 1 and 2.

Note that the new liquid refers to the lubricant as it is, and the deteriorated liquid refers to a liquid obtained by adding 4000 ppm of zinc ions and 200 ppm of iron ions to the new lubricant.

In this performance test, specified materials were immersed in each liquid, pulled up, dried, and processed under the following processing conditions (forward extrusion processing and drawing processing) to determine the performance (extrusion load, pullout force, and presence or absence of seizure). was evaluated.

(A) Forward extrusion processing conditions; Extrusion speed: 800 m/min Workpiece material: S 20C. 9.9 ++unφ, phosphate film treatment. Cross-section reduction rate: 263%.

In addition, the extrusion load (k
N) was measured using a load cell.

(B) Drawing processing conditions; Drawing speed: 300 mm/min Wire rod: SWRM8, 5 mmφ, phosphate film treatment cross-sectional reduction rate = 42%.

Table 1 shows the pulling force (kN) when drawing is performed under these conditions.
) was measured using a load cell.

(3) Performance evaluation As shown in Tables 1 and 2, in this example, compared to each comparative example, there is no difference in performance in the case of new liquid, but for each deteriorated liquid, the performance during extrusion and Even during drawing, the lubricity was extremely good. That is, in the extrusion process, the extrusion load increased and seizure occurred in all of the comparative examples, but in Examples 1 to 3, the load was almost the same as that of the new solution, and no seizure occurred at all. In the drawing process, in Comparative Examples 2 and 3, breakage occurred during drawing, but in Examples 1 to 3, this breakage did not occur at all, the drawing force was almost the same as in the case of the new liquid, and there was no seizure. It didn't happen.

In addition, in Comparative Example 1, the water-insoluble lubricant contaminated the area around the machine and made the working environment worse, but in Examples 1 to 3,
There were no such inconveniences.

Note that the present invention is not limited to what is shown in the above-mentioned specific examples, but can be variously modified within the scope of the present invention depending on the purpose and use. That is, the types of each compositional component and their addition ratios can also be selected variously. The point is, the purpose
It is sufficient if the lubricant component can be made according to the intended use and microencapsulated with an appropriate organic polymer material. This lubricant is
It can be applied not only to the extrusion processing and drawing processing described above, but also to other plastic processing, and has the same effects due to the same action.

〔Effect of the invention〕

As mentioned above, the lubricant for plastic working of the present invention does not deteriorate in lubricity even when the lubricant is used for a long period of time or is contaminated with foreign substances from the previous process, and maintains excellent lubricity. Demonstrate. In addition, since the lubricant component is contained within the microcapsules, it is possible to reduce dirt around the machine, improve work boundaries, and improve work efficiency.

Patent applicant: Yushiguchi Chemical Industry Co., Ltd. Agent
Patent attorney Kiyoji Kojima

Claims (1)

[Claims] (1) A lubricant component containing at least one selected from mineral oil, synthetic lubricant, oiliness improver, and extreme pressure agent is encapsulated in microcapsules made of an organic polymer material. Lubricant for plastic processing.