JPS63227666A - Static electrification-controlling resin composition and roller using said resin composition - Google Patents

Abstract

PURPOSE:To provide a static electrification-controlling resin compsn. suitable for producing a roller having excellent wear resistance and capable of semipermanently maintaining its constant conductivity, by comprising a thermosetting resin, a thermoplastic polymer and/or a thermoplastic elastomer and a high compounding amt. of a specific antistatic agent. CONSTITUTION:A resin composition comprises (A) 100pts.wt. (hereinafter pts.) of an alkylolamide antistatic agent of the formula (R is 3-15C aliphatic hydrocarbon group) synthetized by amidizing a fatty acid with diethanolamine, (B 30-120pts. of a thermosetting resin (preferably phenolic resin, epoxy resin, urethane resin or their mixture) and (C) 5-100pts. of a thermoplastic polymer (preferably polyvinyl butyral, polyvinyl formal or phenoxy resin) and/or a thermoplastic elastomer (preferably nitrile rubber or styrene-butadiene rubber). A roller is provided with a layer of said resin compsn. at least on the surface of the roller.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention provides a chargeability control resin composition and a chargeability control resin composition that have practically sufficient physical properties and can maintain a constant resistance value in a semi-conductive range semi-permanently. The present invention relates to a roll using the resin composition that has excellent abrasion resistance and maintains a constant charging property semi-permanently.

<Conventional technology> Plastics generally have low conductivity and are easily charged due to friction and electrical charges, which can cause various problems in the field of plastic molded products, films, and sheets, such as discharge, electric shock, and adsorption of dirt and dust. For example, plastic rolls or metal rolls with plastic surfaces are generally used as rolls for processing and transporting films and powders in order to avoid damaging the other material. Due to the high resistance of friction,
There is a problem that it is easily charged with electricity and the amount of conveyance is damaged due to electric shock.

There is a need for technology to control charging properties, such as preventing such charging, or conversely, dissipating the charge in a short period of time after being temporarily charged, and plastic rolls with controlled charging properties are needed. It is requested.

<Problems to be Solved by the Invention> Conventionally, in order to prevent static electricity from plastics, the following various methods have been used: (1) A separate static eliminator is provided to remove static electricity.

(2) Conductivity by adding carbon and metal fillers.

(3) Surface application of antistatic agent.

(4) Internal kneading of antistatic agent.

has been studied, and a method of applying an antistatic agent to the surface of the metal roll has been implemented in order to increase the antistatic effect of the metal roll.

Among these methods, method (1) requires grounding or a static eliminator, and has the disadvantage that drawing becomes complicated depending on the application. In method (2), the conductivity is due to direct contact between the fillers, so if you try to obtain a stable resistance value, you can only obtain a value that is close to the resistance value of the filler itself, which limits its application. It will be done. Although method (3) has the advantage of being able to easily control charging properties, it has the disadvantage that the antistatic agent is easily removed by washing with water or friction.

In addition, the method for internally kneading the antistatic agent (4) is from 0.1 to
Approximately 1% of antistatic agent is mixed in, and this antistatic agent bleeds and covers the surface, lowering the surface resistance and controlling charging properties.The bleeding antistatic agent prevents dirt and dust from forming on the surface. They had the disadvantage of lacking long-term stability because the internal antistatic agent was gradually lost due to adhesion and bleeding.

In addition, for metal rolls, the method of coating the surface of the roll with an antistatic agent easily produces an effect, but on the other hand, the antistatic agent applied to the surface is easily removed due to friction and the effect disappears. In addition, there was a risk that the removed antistatic agent would adhere to or be mixed into the treated product.

Conventionally, it is common sense to obtain an antistatic effect by blending an antistatic agent into a resin, etc. in an amount of about 0.1-1% or less, and if more than that is used, the antistatic agent may bleed onto the surface. It was considered undesirable.

<Means for Solving the Problems> In view of the above-mentioned conventional problems, the inventors of the present invention have conducted repeated studies to solve the problems, and have found that the conventional method of using an antistatic agent is preferably 1% culm or less. Breaking away from common sense and using antistatic agents in combination with other compatible resins,
Even if the antistatic agent is used in an amount of 30 to 75% of the total, which is approximately the same amount or more than the other resin components, not only will no adverse effects occur, but a constant range of resistance values can be obtained over a wide range of semiconducting regions. We have discovered a charge control resin composition that has practically sufficient physical properties and is effective as an antistatic, charge control, and electrically conductive material without the risk of bleeding. The roll has excellent abrasion resistance on the surface, and 30 to 120 parts by weight of thermosetting resin and thermoplastic resin and/or thermoplastic rubber are added to 100 parts by weight of a compound having a semi-permanently constant conductive chemistry. 5-100
The object of the present invention is to provide a chargeability control resin composition formed by blending a heavy hanging portion, and a roll having a chargeability control resin composition layer on at least the surface thereof.

<Function> The compound having the above chemical structural formula used in this defense is a substance that controls electrostatic properties, and is an alkylolamide-based antistatic agent synthesized by amidating fatty acids with jetanolamine. It may be either saturated or unsaturated, and it is preferable to use an aliphatic hydrocarbon in which R in the formula is from C3 to C1, regardless of whether it is vegetable, animal, or synthetic.

The thermosetting resin is used to confine the chargeability-controlling compound described above in the resin to prevent bleeding and to improve the physical properties of the resulting chargeability-controlling resin composition. Although the type is not particularly limited, it is preferable to use phenol resins, epoxy resins, and urethane resins alone or in combination. The amount of these thermosetting resins used is 30 parts by weight per 100 parts by weight of the charge control compound.
~120 parts by weight is suitable. If it is less than 30 parts by weight, the chargeability control compound will undesirably bleed onto the surface of the composition, and the physical properties of the resin composition will deteriorate, making it unusable.

If the amount exceeds 120 parts, the chargeability will be almost the same as that of thermosetting resin alone.

Thermoplastic resins and/or thermoplastic rubbers are used to assist the function of thermosetting resins and to improve moldability and coating properties, so they are compatible with thermosetting resins. Any material can be used without any particular restriction, but among them, polyvinyl butyl resin, Ral resin, polyvinyl formal resin, phenoxy resin, nitrile rubber, and SBR are effective.

If the amount used is less than 5 parts by weight, the resin composition becomes brittle, which is undesirable, and if it exceeds 100 parts by weight, the crosslinking density of the thermosetting resin decreases and bleeding occurs, so 5 to 100 parts by weight is preferable. .

In short, the chargeability control resin composition of the present invention includes a chargeability control compound having the chemical formula 41t, a thermosetting resin, a thermoplastic resin, and/or a thermoplastic rubber in a blending ratio within the above-mentioned usage range. By selecting the desired volume resistivity, it is possible to obtain a volume resistivity within the range of about 10 Ωcm to about 1012 Ωcm, and the chargeability can be controlled, and the composition and roll can have practically sufficient physical properties. It can be used depending on the situation.

The thus obtained resin composition of the present invention is an antistatic material,
It can be applied as a charge control material or a conductive material, such as a dustproof material for clean rooms, a high resistance material, etc., or in the form of a laminate plate, a laminate tube, a molded product, a paint, a coating material, or a composite material.

The roll of the present invention has the chargeability control resin composition obtained as described above on at least the surface thereof, and is composed of a roll molded using the resin composition, a roll molded using the resin composition, and a roll molded using the resin composition. This includes embodiments such as rolls made by impregnating materials and laminating them, or rolls made by coating the surface of a plus deck roll or metal roll with the resin composition.

<Example> Hereinafter, this invention will be explained in detail with reference to Examples.

Example 1 A compound having the chemical structural formula, a thermosetting resin, a thermoplastic resin, and a thermoplastic rubber were blended as shown in Table 1 below,
A chargeability control resin composition was obtained by uniformly mixing at room temperature.

The composition was then dissolved in methyl cellosolop to give a concentration of 50-6
After adjusting the concentration to 0%, each composition was dip coated onto an aluminum plate and dried by heating at 150°C for 1 hour to give a concentration of 0.5%.
A coating film with a thickness of rnm was formed.

Next, the volume resistivity (ρ,) of the coating film on this aluminum plate
When tests 1 to 1 were conducted to determine the occurrence of bleeding, the results shown in Table 1 were obtained.

The method for measuring volume resistivity (ρV) is JISK-6911.
According to. In addition, the bleed property was measured at 40°C on the coating film on the aluminum plate.
After leaving it for one week in 90% R, l-1, the membrane was strongly rubbed with a cotton cloth, and the presence or absence of a kimono was determined.

Note that the numbers marked =1= in the table are comparative examples outside the scope of the claims of the present invention.

Notes to Table 1 (1) PVB resin in the table is polyvinyl butyral resin.

(2) PVF resin in the table is polyvinyl formal resin.

(3) Cracks occurred in the comparative example roll of sample number 12 in the table.

Example 2 The formulation of Trial No. 1 in Table 1 of Example 1 was dissolved in methyl chloride ketone to obtain a 50% concentration control resin solution.

Next, Kura 71-paper was impregnated with this resin solution, dried, and then a roll was created by a rolling method.

19 Volume resistivity and abrasion resistance test of the rolled rolls - The results are shown in Table 2.

Example 3 100 parts by weight of the same compound used in Example 1, 70 parts by weight of phenol resin, and 610 parts by weight of 2]. Ta.

Next, the aluminum pipe was immersed in this resin solution and heated to 150°C.
The mixture was heated and dried for 1 hour to form a film with a thickness of 150 μm on the aluminum pipe.

Comparative Example A coating was formed in the same manner as in Example 3 by immersing an aluminum pipe in a 50% methanol solution of phenolic resin. A diluted solution of an antistatic agent (manufactured by Kao Soap Co., Ltd., ■Rek! ~ Lost Stripper QN) in methanol was applied to this roll by dip coating.

The performance of the roll thus obtained is shown in Table 2.
Table 2 Abrasion resistance was determined by visually examining the surface condition after two rolls were rubbed together 20 times.

<Effects of the Invention> As explained above, the conventional idea that it was undesirable that the antistatic agent would bleed onto the surface of the coating using a resin containing 1% or more of an antistatic agent has been overcome. In contrast, the chargeability control resin composition of the present invention uses a chargeability control compound in combination with a thermosetting resin, thermoplastic resin, and/or thermoplastic rubber that is compatible with the chargeability control compound. The purpose is to confine the compound within the resin to prevent the occurrence of bleed, making it possible to use the compound in 30 to 75% of the entire resin composition for large seedlings.

The chargeability control resin composition of the present invention thus obtained has a volume resistivity within the range of 108 to 1012 ΩcIn,
No bleeding was observed, demonstrating excellent long-term stability, and rolls using this resin composition have excellent abrasion resistance, and there is no risk of electrostatic charge, so there is no risk of damaging the conveyed amount. In practical terms, it was recognized that the roll was 1" loose.

Applicant's representative Patent attorney Kazu 1) Damage to amendment in Showa proceedings (voluntary) April 30, 1985 Chargeability control resin composition and roll 3 using the same, relationship with the person making the amendment Patent applicant's address 2-1-9 Dojima, Kita-ku, Osaka Name: Risho Kogyo Co., Ltd. 4 Contents of amendments to the section 1 “Detailed explanation of the invention” in the agent specification (1) “Consideration” on page 4 of the specification cylinder, line 13 "Metal roll" has been corrected to "Plastic roll or metal roll with plastic surface under consideration."

(2) On page 5, line 13, "Applicable metal rolls" has been corrected to "also plastic rolls or metal rolls with plastic surfaces."

Claims (8)

[Claims] (1) 100 parts by weight of a compound having the chemical structural formula ▲ Numerical formulas, chemical formulas, tables, etc.
Weight part and thermoplastic resin and/or thermoplastic rubber 5~
A chargeability control resin composition containing 100 parts by weight. (2) Thermosetting resin is phenol resin, epoxy resin,
The chargeability control resin composition according to claim 1, which is a urethane resin or a mixture thereof. (3) The chargeability control resin composition according to claim 1, wherein the thermoplastic resin is a polyvinyl butyral resin, a polyvinyl formal resin, or a phenoxy resin. (4) The chargeability control resin composition according to claim 1, wherein the thermoplastic rubber is nitrile rubber or styrene-butadiene rubber. (5) 100 parts by weight of a compound having the chemical structural formula ▲ Numerical formula, chemical formula, table, etc. ▼ and 30 to 12 parts by weight of thermosetting resin
0 parts by weight, thermoplastic resin and/or thermoplastic rubber 5
A roll having a resin composition layer of ~100 parts by weight on at least its surface. (6) Thermosetting resin is phenol resin, epoxy resin,
The roll according to claim 5, which is a urethane resin or a mixture thereof. (7) The roll according to claim 5, wherein the thermoplastic resin is polyvinyl butyral resin, polyvinyl formal resin, or phenoxy resin. (8) The roll according to claim 5, wherein the thermoplastic rubber is nitrile rubber or styrene-butadiene rubber.