JPS6162598A - Water-soluble cutting and grinding oil having improved rotting resistance - Google Patents

Abstract

PURPOSE:An emulsion type and solution type cutting and grinding oil preventing rotting caused by microorganisms and deterioration in quality, comprising PP, polybutene, or a branched type alkylbenzene as a base oil. CONSTITUTION:The aimed cutting and grinding oil comprising polypropylene polybutene, or a branched type alkylbenzene (preferably 20-100cst viscosity at 40 deg.C) synthesized from the polymer and benzene as a base oil.

Description

[Detailed Description of the Invention] The present invention is applicable to steel, machinery, and self-improvement! This relates to cutting and grinding fluids for metal materials used in the manufacturing field of B-sealants, etc., and more specifically, emulsifiers and soliages that prevent spoilage and quality deterioration caused by microorganisms. This invention relates to mold cutting and production of grinding fluid.

In the manufacturing, processing and related industries of steel, machinery, automobiles, etc., water-insoluble oils have traditionally been used for cutting and grinding various scrap metal materials.
In recent years, in order to improve the workplace environment and promote production rationalization such as saving resources and cost, cutting and cutting of water-soluble Emulsilane type and Soliege 1-type have been introduced.
Grinding fluids have been introduced, and only recently has there been a tendency for their usage to increase.

Compared to water-insoluble oils, water-soluble cutting φ grinding oils generally contain components such as lubricants, extreme pressure additives, rust preventive agents, and anticorrosion agents in the form of fine particles that can be dispersed or made into water. Dissolve and
Since it exhibits grinding performance in cutting, a stable emulsified or solubilized state is required, and it also has good cutting and grinding performance, long tool life, rust prevention performance, ability to prevent metal discoloration, defoaming ability, and low skin irritation. There has been a demand for special properties such as performance and waste liquid treatment performance. Conventionally, such water-soluble oils have mainly been based on pace oils such as paraffinic or naphthenic mineral oils, and in addition to extreme pressure additives containing sulfur, chlorine, and phosphorus, they have also been used as anticorrosive agents for cutting copper alloys.・Benzotriazole and its derivatives are used for grinding, fatty acid esters, vegetable or animal oils and fats are used as oil improvers, thiazole or triazine fungicides are used as preservatives, and fatty acid salts, petroleum sulfonates, fatty acid alkanols are used as emulsifiers. Amine and polyoxyethylene-based resins are used for a long period of one year or more as emulsilane or soliage in a range of 1 to 10, so during that time, there is no chance of contamination with oils used in the previous process or manipulation. Due to the influx of hydraulic oil, lubricating oil, anti-corrosion oil, etc. from machinery and microbial contamination from the air and environment, rot caused by microorganisms such as bacteria, yeast, and filamentous fungi, deterioration of oil agent performance, rust, and bad odors. In addition to generation, separation of emulsion, generation of adhesive substances,
This has led to problems such as voice deterioration, which remains a problem that needs to be resolved. Emulsion of such cutting/grinding fluids or IJ
, - In order to prevent microbial contamination of silver, conventionally, for example, trishydroxyethyl-triazine, trishydroxymethylnitromethane, 1,2-benzisothiazoline-
Bactericides and preservatives such as 3-one, 2-methyl-4-isothiazolin-3-one, alkanolamines, and voice enhancers such as caustic potash or loading soda have been used, but the effects of these additives are short-term. However, when used in large quantities, it often causes new problems such as the generation of chemical odors, increased toxicity, decreased cutting and grinding performance, and decreased waste liquid treatment performance.

In order to solve the problem of microbial contamination of water-soluble cutting and grinding fluids at metal processing sites, the inventors of the present invention have continued research and found that the main cause of microbial contamination is water-soluble cutting and grinding fluids. It was discovered that paraffinic and 7-tenthyl mineral oils, which are contained in large amounts as pace oils, are rapidly proliferating due to the assimilation of contaminant microorganisms, and synthetic oils with a branched structure are used as pace oils that are difficult to be assimilated by microorganisms. , that is,
By using polypropylene, polybutene, and branched alkylbenzenes synthesized from these polymers and benzene, it is difficult to solve the problem with the conventional use of bactericides, preservatives, and voice enhancers. The present invention was completed by discovering a method for preventing contamination.That is, the present invention uses polypropylene, polybutene, and branched alkylbenzenes derived from these polymers as a pace oil for water-soluble cutting and grinding fluids. This is based on the knowledge that it is not assimilated by contaminating microorganisms and has the ability to cut and grind metal materials.

Polypropylene according to the present invention can be easily synthesized by polymerizing propylene monomers, and polybutene can be easily synthesized by copolymerizing inbutylene and normal butene. It is already a well-known fact that branched alkylbenzenes can be synthesized from polypropylene, polybutene, and benzene by a Friedel-Riller reaction. These polymers can have any viscosity by changing the degree of polymerization, but the cutting and grinding fluid used in the present invention generally has a viscosity of 5 to 150cst (at 40°C). However, in practice, preferably 20 to 100
cst (40°C) polymers are suitable.

However, the spirit of the present invention should not be limited to this viscosity range.

Next, the general compounding ratio of the cutting/grinding fluid according to the present invention is as follows, but is not limited thereto.

Fatty acid salts and fatty acid intermediates 5-15% petroleum sulfonate 5-10% preservatives
Additives such as 0 to 3 cut-off food agents, antifoaming agents, etc.
O~5J water
0 to 5% In addition, extreme pressure additives and various inhibitors can also be blended.

Next, representative examples according to the present invention and comparative examples containing conventionally used mineral oil will be shown and explained.

Example ・tl: Viscosity at 40°C.

-2); Branched alkylbenzene derived from polybutene.

Branched alkylbenzene derived from polypropylene.

・4); Polyoxyethylene chain.

Comparative example-4); Polyoxyethylene chain-5); Machine oil-8 (8 cat, viscosity at 40°C) 1. Test method (1) Preservative test method In a 1 ton Sakaro flask equipped with an air inlet tube. 3-tier seal (using tap water) of the above examples and comparative examples 500 m
, cast iron (FC-20) powder 10 gr.

10g of aluminum alloy powder and rotten cutting oil emulsion collected from the processing site (number of viable bacteria 8 x 10'/-
1 pH 7, 1) and mixed, cultured with shaking at 37°C for 12 hours while blowing 0.5 t of air every minute using a shaking incubator (8 crn), and then blowing air. was stopped and allowed to stand for 12 hours. This operation was repeated every day, and 5 ml of the above-mentioned putrefaction liquid was added every three days. The test culture solution was tested for cell counts (glass electrode meter) and viable cell count (plate agar medium method) every week. .

(2) Cutting performance test 3-ton pattern C-side drawing broaching machine, tools (SKH55 key broach tool width 7 dew, pitch width 8 am) and workpiece material (8450, hardness HRC 16-19, cylindrical outer diameter 50
m, inner diameter 25.3 m, height 20 fi). The cutting conditions were a speed of 2-/m, 42 cutting blades, a maximum cutting depth of 05 per blade, and a finishing of 4 blades.

A three-layer coating (tap water was used) of Examples and Comparative Examples was poured into the processed parts for cutting. Cutting performance was shown by measuring cutting resistance (load cell method) and finished surface roughness (stylus type surface roughness meter).

As the above results show, the water-soluble cutting/grinding fluid according to the present invention is superior to the conventional oil containing mineral oil.
It is clear that it has excellent effects on J performance and antiseptic performance.

Patent applicant: Toho Chemical Industry Co., Ltd. Procedural amendment (voluntary) Entered in 1985 / J Japan Patent Office Commissioner Manabu Shiga 1, Indication of the case 1984 Patent Application No. 184375 2, Name of the invention Good preservative properties Water-soluble cutting/grinding fluid 3. Relationship with the case of the person making the amendment Patent applicant address: 1-14-9 Kakigara-cho, Nihonbashi, Chuo-ku, Tokyo (1 other person) 4. Number of inventions increased by amendment None 5, Subject of amendment Description 1) "Detailed Description of the Invention" column 6, Contents of amendment 1) "Microbial activity" on page 4, line 8 of the specification box is corrected to "microbial contamination."

2) The example "Rapeseed fatty acid salt" on page 7 of the specification is corrected to "Rapeseed fatty acid."

Claims (1)

[Claims] A water-soluble cutting/grinding fluid with good antiseptic properties, characterized by containing polypropylene, polybutene, or a branched alkylbenzene synthesized from a polymer thereof and benzene as a base oil.