JPS62131062A - Platable resin composition having excellent heat transfer characteristic - Google Patents

Abstract

PURPOSE:To form a platable resin compsn. having excellent heat transfer characteristics as compared with conventional moldings, by blending a compsn. consisting of an arom. polysulfone resin, a potassium titanate fiber and an alkaline earth metal carbonate with magnesium oxide. CONSTITUTION:A compsn. consisting of 100pts.wt. arom. polysulfone resin and 2-50pts.wt. alkaline earth metal carbonate is blended with 2-90pts.wt. magnesium oxide. An improvement of 20-100% in heat transfer characteristics is possible by using magnesium oxide. Potassium titanate fiber is ceramic whisker represented by the formula K2O.nTiO2 (wherein n is an integer). Preferred examples of the alkaline earth metal carbonate are calcium carbonate and calcium magnesium carbonate CaMg(CO3)2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a plating resin composition with excellent heat transfer properties.

More specifically, the present invention relates to an aromatic polysulfo/resin composition that has excellent heat resistance and mechanical properties, as well as improved heat transfer properties and plating properties.

[Conventional technology]

Aromatic polysulfone resin is a type of typical engineering/engineering plastic with excellent mechanical, chemical, and thermal properties, and the applicant has already developed aromatic polysulfone resin,
A resin composition comprising potassium titanate fibers and an alkaline earth metal carbonate and having excellent plating properties was disclosed (Japanese Patent Application No. 122,755/1986). However, the above compositions do not have sufficient heat transfer properties and have many restrictions in terms of use. For example, when plastic plating is applied to insulating parts such as IC boards, which have recently been significantly miniaturized and hybridized, potassium titanate fibers and alkaline earth metal carbonates are insufficient to improve the heat transfer properties of the resin composition. was sufficient, and was accompanied by a considerable heat accumulation phenomenon.

In addition, metal powders such as copper, iron, and aluminum, and carbon compounds such as carbon black, graphite, and carbon fibers are sometimes used in combination to impart heat transfer properties, but these have not been put to practical use because they significantly impair the inherent insulation properties of plastics. It wasn't.

[Problem that the invention seeks to solve]

An object of the present invention is to provide an aromatic polysulfone resin composition that also has heat transfer properties and excellent plating properties.

[Failure to solve the problem]

As a result of various studies to achieve the above object, the present inventors found that it is effective to use magnesium oxide in combination with a resin composition consisting of aromatic polysulfone resin, potassium titanate fiber, and alkaline earth metal carbonate. This discovery led to the completion of the present invention.

Specifically, the present invention uses 2 to 90 parts by weight of magnesium oxide in a composition consisting of 100 parts by weight of aromatic polysulfone resin, 2 to 60 parts by weight of potassium titanate fiber, and 2 to 50 parts by weight of alkaline earth metal carbonate. This is a plating resin composition with excellent heat transfer properties.

The aromatic polysulfo/resin used in the present invention is a linear polymer having arylene bonds (aromatic bonds), ether bonds, and sulfone bonds as bonding units. It is being In the missing structural formula, "-φ-" is a paraphenylene group.

(3) fO−φ−5o2−φ−0−φ−〇−φ%(
51-[70-φ-8O□-φ-0-φ-φ+0(6)
(-0-φ-8O□-φ-φ-8O2-φ-O-φ
+0 (F +〇-φ-8O2-φ-〇-φ-CI-1
2-φ9 These aromatic polysulfones can be easily produced by the methods described in, for example, Japanese Patent Publication No. 40-10067, Japanese Patent Publication No. 42-7799, and Japanese Patent Publication No. 47-617. , at least one kind or a mixture of two or more kinds thereof is used. Among the commercially available products, (1) is Pl manufactured by IOI.
us (product name), (Udel manufactured by UOO company)
(product name) etc.

The potassium titanate fiber used in the present invention has the general formula:
It is a ceramic whisker represented by O·nTl0□ (n is an integer), K, 00. , KOH, TiO□, etc. as raw materials, sintering method, melting method, hydrothermal method, flux method,
Manufactured by melt method etc. (Plastics Vol 3
1, A8 (1980). Typical examples include 2Ti205 and K2Ti40, which have a layered crystal structure.
．． and 2TI, 0□3 with tunnel-like crystal structure
, K2TI, OI□, etc.

The amount of potassium titanate fiber used is 2 to 60 parts by weight, preferably 5 to 60 parts by weight, per 100 parts by weight of aromatic polysulfone resin.
It is 50 parts by weight. If the amount used is less than 2 parts by weight, the surface smoothness and mechanical properties of the molded article will be insufficient. Furthermore, if more than 60 parts by weight is used, the melt fluidity during molding will be significantly reduced.

Examples of the alkaline earth metal carbonates used in the present invention include carbonates of magnesium, calcium, strontium, and barium, preferably calcium carbonate 0aOO1
, calcium carbonate magnesium OaMg(COl)2 is used. The amount used is 2 to 30 parts by weight, preferably 5 to 20 parts by weight, per 100 parts by weight of aromatic polysulfone resin.
Parts by weight. If it is less than 2 parts by weight, the plating adhesion will be poor and sufficient peel strength cannot be obtained, and if it is used in excess of 30 parts by weight, the melt fluidity will be significantly reduced.

In the present invention, magnesium oxide is further blended with the aromatic polysulfone resin, potassium titanate fiber, and alkaline earth metal carbonate, but the magnesium oxide used in the present invention is magnesium metal, magnesium carbonate, basic magnesium carbonate, hydroxide. Manufactured by tR firing of maggotium, etc. For example, there are light burnt magnesia fired at 700 to 900°C and heavy burnt magnesia (talinkar) fired at 1600°C or higher, and either of them can be used.

The amount of magnesium oxide used is 1 for aromatic polysulfone resin.
00 parts by weight, 2 to 60 parts by weight of potassium titanate fiber, and 2 to 50 parts by weight of alkaline earth metal carbonate, preferably 2 parts by weight or more and less than 90 parts by weight, preferably 5 parts by weight or more and less than 80 parts by weight. use If it is less than 2 parts by weight, heat transfer properties cannot be imparted, and even if it is used in excess of 90 parts by weight, no further improvement in heat transfer properties can be expected, and on the contrary, the melt fluidity during molding is reduced, so the aroma This is not preferable because the mechanical properties originally possessed by polysulfone resins cannot be obtained.

The use of magnesium oxide improves heat transfer properties by 1 from 20
It is possible to achieve an improvement of approximately 0.00%.

The resin composition for plating with excellent heat transfer properties according to the present invention is
It is desirable that the aromatic polysulfone resin, potassium titanate fiber, alkaline earth metal carbonate composition, and magnesium oxide are uniformly mixed.

The addition and mixing method is not particularly limited, and various means can be employed. For example, they can be fed separately to a melt extruder and mixed, or they can be premixed in advance using a mixer such as a Henschel mixer, ribbon blender, or tumbler, and then fed to a melt mixer. You can also do that. It is also possible to adopt a method in which the components are dispersed in an aqueous medium or an organic medium and mixed by a wet mixing method.

Powder fillers, extenders, stabilizers, coupling agents, glass fibers, and other additives may be used as necessary, as long as they do not impede the effects of the present invention.
Various ceramics such as aluminum oxide, titanium oxide, and silicon carbide may be used in combination.

The resin composition of the present invention described above can be molded into a predetermined molded article by a molding method such as an injection molding method, an extrusion molding method, or a compression molding method.

The resulting γ-shaped molded product has superior heat transfer properties compared to conventionally known products, and can be plated using various plating methods. For example, metal salts (sulfates, nitrates, carbonates, chlorides, etc.) of nickel, cobalt, zinc, tin, chromium, copper, palladium, etc., sodium hypophosphite, sodium hyposulfite, anhydrous sodium sulfite, and hydrazine chloride. The molded product is immersed in a plating bath composed of a combination of a reducing agent such as , hydroquinone, formalin, and a buffering agent consisting of an alkali salt such as acetic acid, lactic acid, tartaric acid, citric acid, succinic acid, malonic acid, adipic acid, or formic acid. Chemical plating, such as pre-treatment with a normal oxidizing conditioning solution such as a chromic acid mixture, followed by immersion in a reducing solution consisting of a silver solution consisting of silver nitrate and aqueous ammonia, and formalin, and utilizing a silver mirror reaction. There are electroplating treatments in which metal is deposited on the surface of the substrate after cleaning with ultrasonic waves or a weak alkaline detergent, and any of these can be employed. There is also a method of combining chemical plating and electroplating.
This method is desirable from the viewpoint of obtaining plating adhesion and surface smoothness.

〔Example〕

The present invention will be explained below with reference to Examples.

Examples 1 to 3 IOI MPE8360 as aromatic polysulfone resin
Otsuka Chemical Co., Ltd. as 0G, potassium titanate fiber
The mixture was triblended with the composition described in ``Crack Teismo D'' (trade name: 2T'a01s), and then made into pellets using a single-screw extruder with a diameter of 40 mm at a cylinder temperature of 320 to 360°C. The obtained pellet was molded into a test piece using an injection molding machine at a cylinder temperature of 560 to 400°C, and the thermal conductivity was measured as mechanical properties and heat transfer properties.

Mechanical properties Tensile strength ASTM D-638 Flexural modulus
ASTM D-790 Heat Deformation Temperature HDT AST
M D-648 Heat Transfer Characteristics Thermal conductivity Measured with Sankei Engineering's thermal conductivity measuring device TXP-400 (Floudge method) In addition, the above pellet was injection molded into a flat plate of 50ts + After conditioning with the shown conditioning solution and washing with water, a copper plating layer with an average thickness of 27 μm was obtained by chemical plating and electroplating according to conventional methods.

Concentrated sulfuric acid ° 31M Kabebe water 0 43 # Chromium trioxide = 26 l The surface smoothness of the obtained plating sample was observed visually and with a surface roughness meter, and the adhesion strength of the plating was determined according to JI8-0648.
It was measured according to the method described in 1.

Example 4 UOO mUdelP- as aromatic polysulfone resin
1700 (trade name), Teismo D as potassium titanate fiber, and alkaline earth metal carbonate were tested.

The same test as in Example 1 was conducted except for the following.

Except for not using magnesium oxide in the Joko A-jo resin composition,
A test similar to Example 8 was conducted.

Comparative Example 2 Except for not using magnesium oxide in the resin composition,
A test similar to Example 4 was conducted.

Table 1 shows the results.

From Table 1, it can be seen that the composition according to the present invention has improved mechanical properties, particularly improved flexural modulus and thermal conductivity, compared to conventional compositions.

〔Effect of the invention〕

The composition according to the present invention has greatly improved heat transfer properties in addition to mechanical properties and plating properties, and is widely used in electrical parts and the like where heat accumulation is a problem.

Claims (1)

[Claims] 100 parts by weight of aromatic polysulfone resin, 2 to 60 parts by weight of potassium titanate fiber, and 2 parts by weight of alkaline earth metal carbonate.
2 to 50 parts by weight of magnesium oxide to a composition consisting of 50 parts by weight
A plating resin composition with excellent heat transfer properties using 90 parts by weight.