JPH03247687A - Antistatic resin composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition, improved in antistatic performance and also designability and capable of further reducing cost by blending a polymer ionic conductor in a polymer resin. CONSTITUTION:The objective composition obtained by blending (A) a polymer ionic conductor composed of a polyether, polyester, polyimine, crosslinked polyether, polyether derivative, etc., in (B) a polymer resin composed of a nonpolar polyolefin resin, ABS resin, PVC resin, polymethacrylic acid ester resin, synthetic or natural rubber, etc. Furthermore, salts of Li, Na, K, Be, Mg, Ca, Cu, Zn and NH4 are especially preferred as a supporting electrolyte of the component (A).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a resin composition endowed with antistatic properties.

BACKGROUND OF THE INVENTION In recent years, countermeasures against static electricity for general-purpose synthetic resins have become a major issue.

Synthetic resin products generally have excellent characteristics such as being light, durable, and non-corrosive, but on the other hand, because they are insulating, static electricity accumulates, causing various problems. For example, there are problems such as dirt and dust adhering to it, making it easy to get dirty, and film-like materials adhering to it, making it difficult to peel off.

In recent years, with the spread of office automation equipment such as computers and word processors, problems such as destruction of recorded information and malfunctions due to static electricity have become a focus of attention.

Traditionally, known methods for preventing the accumulation of static electricity in synthetic resin products include incorporating surfactants with antistatic properties into synthetic resins and mixing conductive fillers such as carbon black. ing.

However, the method of incorporating surfactants has problems in terms of improving the conductivity of the resin and humidity dependence.
Additionally, when carbon black is added, resin products are colored black.

SUMMARY OF THE INVENTION The present invention provides a synthetic resin composition endowed with antistatic ability.

Structure of the Invention The antistatic resin composition of the present invention is characterized in that a polymeric ion conductor is blended into a polymeric resin.

The present invention will be explained in more detail below.

Polymer ionic conductor (polymsr electro
lyte) is a material that exhibits the phenomenon of ion migration, consisting of an ion-conducting polymer and a supporting electrolyte. This action causes carrier generation, and the local movement of the chains transports ions, resulting in ionic conductivity, which is the property of polymers.

It is said to take advantage of the properties of rubber, which behaves macroscopically as a solid but microscopically as a liquid. Published June 8, 1999, pages 44-56).

In other words, the ionic species of the supporting electrolyte are electrically attracted or adsorbed and associated with the polar groups of the ion-conductive polymer, and the polar groups exhibit conductivity by sequentially moving to adjacent polar groups due to micro-Brownian motion. The polar group referred to in the present invention should be understood as a normal group, in which the electron density is unevenly distributed in atoms or atomic groups, and L
It is a part that attracts ionic species such as i+, and in the case of polyether, it corresponds to the oxygen of the oxyalkylene group.

Ion conductive polymers used in the polymer ion conductor of the present invention include the following, with polyether and polyester being typical examples.

(1) Polyether: +CH2-CH2-0+.

+CH-CH2-O+.

CH.

Ah +CH2-CH, -C-0+.

(3) Polyimine : +CH2CH2N+n +CH2-C)+2-N+.

CH□ (4) Polyether crosslinked product: Re (R: -H, -CL) network polymer with (R: -H, -4) CIOC4(Jlz+eα)C1 network polymer with (5) Polyether derivative: 0-CH, CH2-0-CH2CH2-0-CH.

(-P=N0.

O-(, H, CH2-0-CH2CH2-0-CH.

Child-C-CH,-)-.

C=0 04CH, CI (2-0++s CH3 The supporting electrolyte for the polymeric ion conductor used in the present invention is not particularly limited as long as it dissolves in the ionically conductive polymer, but may include alkali metals and alkaline earth metals. , reduced metal or ammonium, hydrohalides, thiocyanates, nitrates, sulfates, phosphates, oxyhalides, oxoxyhalides, and tetrahaloborates are preferred;
Especially Li, Na, and K.

Be t M g g Ca HCu y Z n T
Salts of NH4 are preferred.

This is because the ions of these salts have a relatively small ionic radius and the solvation radius for the ion-conducting polymer is small by /J%, so they easily associate with the polar groups of the ion-conducting polymer and do not react in an electric field. This is because electrophoresis is easy, so it has good conductivity, and as a result, it can have good antistatic performance.

The blending ratio of the ion conductive polymer and the supporting electrolyte in the polymer ion conductor is preferably 0.01 to 1 gram equivalent of the supporting electrolyte per polar group in the ion conductive polymer.

The polymer resin to which the polymer ion conductor is blended in the present invention is not particularly limited, and includes, for example, non-polar polyolefin resins such as polyethylene, polypropylene, and polystyrene, ABS resins, and polyvinyl chloride resins (soft and hard). , general-purpose plastics such as polyvinylidene chloride resin, polymethacrylic acid ester resin, synthetic rubber such as 5BR (styrene butadiene rubber), natural rubber, etc., and these may be crosslinked or vulcanized.

The amount of polymeric ion conductor added to the polymeric resin depends on the use of the resin and the required antistatic properties, but in general,
It is appropriate that 5 to 40 parts by weight of the polymer ion conductor be superimposed on 100 parts by weight of the polymer resin.

The antistatic resin composition of the present invention has appropriate conductivity and can prevent the accumulation of static electricity. Therefore, it can be used for a wide range of purposes, such as flooring materials used in offices where computers and OA equipment are installed, interior materials such as wall materials, antistatic rugs used on floors and table tops, etc. Used for housings of various devices such as electronic devices.

In particular, when the composition of the present invention is used as a floor material or rug, it is desirable that the surface resistance of the floor material, etc. is 105 to 10 s (Ω). In these cases, the composition of the invention may be applied throughout its thickness, i.e. as a single-layer product;
The composition of the present invention is used only in the surface layer, and the lower layer is made of other antistatic sheets (for example, synthetic resin sheets using carbon black, metal sheets, etc.), ordinary resin sheets, fiber sheets (woven sheets, etc.). It is also possible to use a laminated type flooring material that is made of fabric, knitted fabric, non-woven fabric) or a combination of these materials. In this case, the surface layer must be of high quality in terms of not only antistatic performance but also its sensitivity to humidity, colorability, etc. The characteristics of the resin composition according to the invention are maintained, and the flooring material as a whole becomes advantageous in terms of cost. For laminated type, the surface layer is 0.3i
+m or more is preferable in terms of wear resistance, mechanical strength, etc.

Furthermore, the composition according to the present invention can be used as a chip.

Either ordinary resin chips are mixed with this and solidified, or the resin composition according to the present invention is used as a sea component, and ordinary chips are mixed therein as an island component to form a sea/island structure. It is also possible to have a structure in which the object is continuous from the surface to the bottom surface through the gaps between the ordinary chips. In these cases, a pattern can be formed by the chips, which improves not only various performances such as antistatic performance but also design. This is preferable because it improves the performance and makes it inexpensive.Of course, various materials such as those described above may be laminated thereon.

According to the present invention, a polymer ion conductor is blended into a high-resistance polymer resin that does not exhibit electrical conductivity, thereby making the resin composition conductive and imparting antistatic ability. I can do it. By using a polymeric ionic conductor, higher conductivity than conventional surfactants can be obtained.

Furthermore, unlike conventional surfactants, there are fewer problems in terms of long-term stability of conductivity and humidity dependence, and
Unlike carbon black, a transparent film is obtained without coloring the resin black, and the resin composition can also be colored in any color, and is excellent in terms of colorability.

Example 1 Each vinyl chloride resin sheet having the composition shown in Table 1 below was manufactured, and the electrical resistance (surface electrical resistance) was measured.

Here, the electrical resistance was measured at an applied voltage of 500 V using a bond resistance meter based on JIS-K 6911.

Example 2 An antistatic rug made of a rubber sheet having the composition shown in Table 2 below was manufactured, and the electrical resistance value was measured in the same manner as in Example 1.

×2) Polymer blend of acrylonitrile butadiene rubber and polyvinyl chloride (70/30) ×3) Both vulcanization accelerators manufactured by Sanshin Kagaku Kogyo ■ ×4) Polyethylene glycol with a molecular weight (β) of 400 (blank below) Example 3 First, a paste having the composition of 1 in Table 3 above was prepared.

On the other hand, the composition of &2 is heated, mixed, cooled, and pulverized to prepare a powder having an average particle size of 2 mm. The paste was coated on a Teflon carrier sheet to a thickness of about 1 mm, and the powder was sprinkled on top of the paste in the following manner:
1 kg/rrF), the paste is gelled by hot pressing, and at the same time, the powder is embedded and integrated into the paste to form a sheet with a thickness of about 1 mm.

This sheet and Nα3 crosstalk sheet (thickness 1 + am)
were laminated by hot pressure to obtain a sheet-like flooring material with a total thickness of about 2 mm.

The surface resistance of this flooring material was 5×10'Ω, and it had good electrical conductivity.

Procedural amendment April 4, 1990 Display of incidents 1990 Patent Application No. 46971, name of invention Antistatic resin composition person who makes corrections Relationship to the case Patent applicant 1-25-1 Eijo, Adachi-ku, Tokyo Tajima Co., Ltd. Representative 1) Sakae Shima

Claims (1)

[Claims] 1. An antistatic resin composition characterized by blending a polymeric ion conductor into a polymeric resin.