JPH02276861A - Colorable conductive polyamide resin composition - Google Patents

Abstract

PURPOSE:To obtain a colorable polyamide resin composition, excellent in electric conductivity and suitable to antistatic parts such as magazines for IC by blending specific amounts of groups I and/or II metal (salt) of the periodic table with a glycerol-based compound. CONSTITUTION:A composition obtained by blending 100 pts.wt. polyamide-based resin (e.g. nylon 12 or nylon 11) with (A) 0.01-15 pts.wt., preferably 1-10 pts.wt. one or more of groups I and/or II metals (e.g. lithium or potassium) of the periodic table and/or salts thereof (e.g. an inorganic compound, such as halide) and (B) 0.5-20 pts.wt. glycerol-based compound (e.g. glycerol or diglycerol).

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a conductive polyamide resin composition which uses the polyamide resin of the present invention as a base, has excellent conductivity, and can be colored.

[Conventional technology] The conductive resin that has better antistatic effect than the conventional one is IC4.
) Used in carrier cases for protection of L S 1 etc. and packaging materials for electronic parts.

The conductive resin used in this case is mostly a mixture of carbon blank and thermoplastic resin due to problems such as price, electrical properties, mechanical properties, and moldability.

However, although thermoplastic resin containing carbon blank has good conductivity, the resulting molded product has a black tone, making it unsuitable as a conductive resin material when color separation is required, and the aesthetics are poor. The current situation is that it cannot be used in the areas that are required.

There is also a method of applying antistatic treatment to the surface of a colored molded product, but this method has the disadvantage that the effect (conductivity) disappears in a short time.

For this reason, in recent years, various types of conductive resins that are blended with thermoplastic resins and water-soluble resins have been developed and studied as conductive resins that can be colored into desired colors.

However, the common disadvantages of products containing water-soluble resins are that the physical properties of the molded product (e.g., elongation, tensile strength) are significantly reduced, the surface of the molded product tends to become sticky, and particles are easily absorbed. There are disadvantages such as being easy to use.

[Problem that the invention seeks to solve]

Therefore, the present inventors previously discovered (Japanese Patent Application No. 63-12723) that it is possible to color carrier cases and packaging materials for protecting RCs, LSIs, etc., and that molding is easy and that the resulting molded products are This provides a conductive polyamide resin composition with excellent mechanical properties.

Based on this situation, and as a result of various studies, the present invention has the following properties: By blending a predetermined amount of a glycerin-based compound when kneading a component into a polyamide-based resin,
The object of the present invention is to provide a colorable conductive polyamide resin composition that has improved moldability and appearance of molded products, and has dramatically increased conductivity.

[Means to solve the problem]

In order to achieve the above purpose, polyamide resin 100
0.01 to 15 parts of one or more metals and/or metal salts of Group Ⅰ and/or Group Ⅰ of the Periodic Table of Prisoners per part by weight (hereinafter abbreviated as ``parts''), fBl 0.5 to 20 parts of a glycerin compound.

This is a colorable conductive polyamide resin composition characterized by blending the two components mentioned above and (Bl).

The polyamide resin used in the present invention may be one obtained by repeating amide bonds and condensation polymerization, such as nylon 12, nylon 11°, nylon 6, nylon 6.6',
Examples include nylon elastomer.

Examples of metals in Groups 1 and 2 of the periodic table include lithium, potassium, sodium, beryllium, calcium, magnesium, aluminum, etc., and metal salts in Groups 1 and 2 of the periodic table include halides and perchlorine. Examples include acid salts, perbromates, chlorates, bromates, thiocyanates, nitrates, sulfates, phosphates, fatty acid salts, etc. Specific compounds include potassium thiocyanate and sodium thiocyanate. , lithium ocyanate, lithium sulfate, lithium stearate, lithium chloride, lithium perchlorate, etc.

In particular, the metal salts of the above-mentioned inorganic compounds are white in color, so even after being blended into the polyamide resin, they can be colored into various desired colors, and the mechanical properties of the resulting molded products are improved. Conductivity etc. do not deteriorate at all.

The Bl glycerin compounds used in the present invention include:
Examples include glycerin, diglycerin, tetrapolyglycerin, hexabolyglycerin, decapolyglycerin, and the like.

In the present invention, by blending the +Bl component, the dispersion of the captive component into the polyamide resin becomes extremely good, which not only significantly improves the conductivity, but also allows for the production of films and filaments that were difficult to use in the past. However, materials exhibiting extremely excellent mechanical properties can be obtained.

In the present invention, 0.01 to 15 parts of one or more of metals of Group Ⅰ and/or Group Ⅰ of the Prison Periodic Table and/or their salts are blended to 100 parts of polyamide resin. . In this case, if the amount of the active component used is less than 0.01 part, a sufficient conductive effect cannot be obtained, which is not preferable.

However, even if more than 15 parts of the active ingredient is added, the conductivity effect is not particularly improved, and the mechanical properties of the resin composition are rather deteriorated, which is not preferable.

In addition, it is particularly preferable that the amount of the active ingredient is 1 to 10 parts because the balance between electrical properties and moldability is particularly good.

(0.5 to 20 parts of the glycerin compound as the Bl component is blended. At this time, if the amount of the +81 component used is less than 0.5 parts, the dispersibility of the captive component in the polyamide resin will improve. However, even if more than 20 parts of component (B) is added, the dispersibility and conductivity of the active ingredient will not particularly improve, but rather the mechanical properties of the composition will deteriorate. decreases, which is not desirable.

There are no particular restrictions on the method for producing the conductive polyamide resin composition of the present invention, and it may be produced by generally blending various additives with polyamide resin.

The dye and pigment used for coloring the composition of the present invention may be any dye that has been conventionally used for coloring polyamide resins.

For the purpose of easily dispersing the dye and pigment, fatty acids, fatty acid metal salts, low molecular weight polymers, fatty acid waxes, etc. may be added.

Furthermore, if desired, other additives such as antioxidants, photodegradation inhibitors, plasticizers (bararoctylbenzene, N-butylbenzene, sulfonamide, etc.) can be added at an appropriate time. .

Examples and comparative examples will be described below.

Example 1 100 parts of powdered 6-nylon resin, 5 parts of potassium thiocyanate, and 7 parts by weight of glycerin were blended using a Henschel mixer, and then mixed and extruded using a twin-screw extruder to obtain the conductive material of the present invention. A pellet of polyamide part by weight composition was obtained.

Next, a test sample of 1100 x 150 x 2 was made using an injection molding machine using the pellet obtained above.

Examples 2 to 13 and Comparative Examples 1 to 6 Subsequently, Examples 2 to 13 and Comparative Examples 1 to 6 were also produced using the same manufacturing method as in Example 1, and the blending ratios (parts by weight) are shown in Table 1. , and P C” used in component (c)
500. PG''750 represents hexapolyglycerin and decapolyglycerin, respectively.

Next, the following (a) and (b) were measured for each sample obtained in Examples 1 to 13 and Comparative Examples 1 to 6, and the results are shown in Table 1.

B) Volume resistivity 50x50n aluminum foil tape with conductive adhesive was pasted on the front and back sides of a molded plate with a thickness of 2u as electrodes, and the temperature was 23℃.
Measurement is performed in an atmosphere with relative humidity of 55%.

(b) Appearance of molded product The appearance of the sample piece is visually judged, and at the same time, the degree of stickiness of the surface condition is judged using a tentacle.

The symbols in the table mean the following conditions.

■・・・External surface condition is very good O・・・・
・Appearance surface condition is good×・・・Poor appearance or stickiness occurs on the surface [Effects of the invention] Polyamide resin has polyamide bonds that exhibit polarity in its system, so it is difficult to blend. The trapped components are easily dispersed.

In addition, in the present invention in which a Bl component is further blended, a colorable conductive polyamide resin composition with markedly improved conductivity and which facilitates the dispersion of the binder component into the resin is obtained.

The volume resistivity value is stable in the range of 10'' to 109Ω-gloss, and this value cannot be obtained if either the fi+ component or the fi+ component is below the specified value; It is nothing but the result of the interaction obtained by using two components.

In particular, when a metal salt is used as a captive ingredient, it is white and light in color, so by adding any coloring side, it can be enriched to the desired color, making it easy to produce colorful molded products. can.

As described above, since the conductive polyamide resin composition of the present invention can be colored and has excellent conductivity, it is widely used in antistatic parts such as IC magazines and IC trays, packaging and storage containers for semiconductor-related products, and automobiles. Can be used for products that require dustproofing, such as interior parts and clean rooms.

In particular, the present invention, in which the two components of silane and +Bl are uniformly dispersed, can also be used for films and filaments.

Claims (2)

[Claims] (1) For 100 parts by weight of polyamide resin, (A)
0.01 to 15 parts by weight of one or more metals of Group I and/or Group II of the Periodic Table and/or their salts; (B) 0.5 to 20 parts by weight or more of a glycerin-based compound; A colorable conductive polyamide resin composition comprising two components (A) and (B). (2) The colorable conductive polyamide resin composition according to claim 1, wherein the metal salt of Group I and/or Group II of the Periodic Table is an inorganic compound.