JPS63359A - Synthetic resin composition - Google Patents

Abstract

PURPOSE:To obtain a resin compsn. which has excellent sliding characteristics as well as excellent rigidity and tapping strength and can be used as a base polymer including styrene resins which is inexpensive and has good processability, by blending a synthetic resin with silicon dioxide, paraffinic oil and glass fiber. CONSTITUTION:A compsn. is formed from 100pts.wt. synthetic resin, 1-20pts.wt. silicon dioxide, 1-30pts.wt. paraffinic oil and 1-20pts.wt. glass fiber. As the synthetic resin, resins conventionally used as base polymers for sliding materials, such as polyacetal, polyamide, etc., can be used. Styrene resins and mixtures thereof with other resins are preferred from the viewpoints of processability and cost. As silicon dioxide, finely divided hydrated silicon dioxide (SiO2.nH2O) having a water content of 2-10wt% is preferred from the viewpoints of the processability and the antistatic properties of the compsn.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a synthetic resin assembly that has excellent sliding customization, rigidity, and tapping strength.

<Prior art> It has been known that a composition with improved sliding properties can be obtained by incorporating a lubricating oil into a resin, and it has been known that a composition with improved sliding properties can be obtained by using polyacetal or polyamide powder. Method (Special Publication No. 46-42217, Special Publication No. 46-53
21), a method of using lubricating oil in combination with graphite or activated carbon (Japanese Patent Laid-Open No. 101051/1983) has been proposed.

<Problems to be Solved by the Invention> However, conventional lubricating oil-containing resin compositions are not fully satisfactory in terms of sliding properties, and have poor rigidity and V.
It had the problem of poor tapping strength.

Furthermore, from the standpoint of sliding properties, conventional compositions are based on expensive polymers such as polyacetal, polyamide, polycarbonate, and polybutylene terephthalate V-T-Z, and require special manufacturing equipment (kneading machines). Means for Solving the Problems The present inventors have developed not only sliding properties but also rigidity and The results of intensive research into a composition that has excellent tapping strength, can also use styrene resin, which is inexpensive and has excellent processability, as a base polymer, and can be manufactured using a normal kneading machine. , the present invention has been achieved.

That is, the present invention has excellent patentability and tapping strength, characterized by comprising 100 parts by weight of sodium resin, 1 to 20 parts by weight of silicon dioxide, 1 to 30 parts by weight of paraffin oil, and 1 to 20 parts by weight of glass fiber. The present invention provides a synthetic resin composition.

The composite resin composite sole of the present invention will be explained in detail below.

The synthetic resins used in the present invention include not only polyacetal, polyamide, polycarbonate, and polybutylene terephthalate, which are conventionally used as base polymers for sliding materials, but also C, vinyl chloride resin,
Polystyrene (PS), rubber reinforced polystyrene (HI
PS ), styrene-acrylonitrile resin, styrene-maleic anhydride resin, styrene-maleimide resin, A
BS resin, MBS resin, AES resin, ACS resin,
Examples include AAS41 resin, polyethylene, polypropylene, and polyphenylene oxide, and one type or two or more types can be used.

Special KPS, HIPS, styrene-acrylonitrile resin, styrene-maleic anhydride resin, styrene-maleimide resin, AB Si resin, MBS resin, AES resin,
Styrenic resins such as ACS resin and AAS@resin, and mixtures of styrene resins and other resins are preferred from the viewpoint of processability and cost.

In addition, in styrene-based resins, some or all of the styrene is substituted with alkyl-substituted styrene (α-methylstyrene, p
-methylstyrene, etc.).

Silicon dioxide has the general formula SiO or SIO2・nHt
This is a compound represented by o. Usually, they are fine particles having an average primary particle diameter of 10 to 50 μm (average secondary particle diameter of 05 to 75 μm). In particular, from the viewpoint of parabolic processability and antistatic properties, hydrated silicon dioxide (S i O, .nH20) with a water content of 2 to 10% by weight (105°C. 2 hours) is used.
is preferable.

The amount of silicon dioxide to be used can be appropriately selected depending on the sliding properties, mechanical strength, and processability of the composition, and is 1 to 20 parts by weight per 100 parts by weight of the resulting resin.

If the IM amount is less than 20 parts by weight, the sliding properties will be poor, and if it exceeds 20 parts by weight, the mechanical strength will be poor.

In general, lubricating oils have a structure area of romatic oil,
Classified as naphthenic oil and paraffinic oil.
Ru. In addition, these oils are not limited to natural oils and manufactured oils, but also include other types of oils, and are usually aromatic oils with an aromatic carbon content of 35i or more, naphthenic oils, and naphthenic oils with naphthenic ring carbons. is 30-450-4
5 parts by weight and paraffin-based oil refer to those having 50 parts by weight or more of paraffin chain carbons.

In the present invention, paraffinic oil is an essential component, and the composition targeted by the present invention cannot be obtained using aromatic oil or naphthenic oil.

The content of paraffin oil can be selected as appropriate depending on the use of the final PAi product and the seed material of the base polymer. ．． 1 to 30 per 100 parts by weight of resin
Parts by weight.

If it is less than 1 part by weight, the sliding properties will be poor, and if it exceeds 30 parts by weight, the hardness and 1'@thermal properties will be poor.

In particular, from the viewpoint of sliding properties and mechanical strength, as well as the production of the composition, it is preferable that the total weight ratio of diacid f hysilicate to paraffinic oil is 1=1 to 3.

Furthermore, the glass fibers used in the present invention include galanic fibers made by treating single fibers and single fibers with silane-based machining/chromium-based focused cutting, and the fiber length and fiber diameter are limited. However, from the viewpoint of the rigidity, tapping strength, processability, etc. of the resin composition, it is preferable that the fiber length is 3 to 10<->1 and the fiber diameter is 3 to 20 .mu.m. Note that the present invention also includes a resin composition that is kneaded in the form of long fibers and then cut into pellets.

The blending amount of glass fiber is 1 to 2 per 100 parts by weight of synthetic resin.
It is 0 parts by weight. If it is less than 1 part by weight, the rigidity and tapping strength will be poor, and if it exceeds 20 parts by weight, the impact strength will be poor.

The synthetic resin composition of the present invention includes 100 parts by weight of synthetic resin, 1 to 20 parts by weight of silicon dioxide, and 1 to 20 parts by weight of balafino oil.
30 parts by weight of glass fibers and 1 to 20 parts by weight of glass fibers are obtained by uniaxial extrusion using a general kneading and kneading machine.

There is no restriction on the shape of the synthetic resin used, and any shape such as powder, beads, pellets, dice, etc. can be used.

Furthermore, there is no restriction on the order in which the synthetic resin, silicon dioxide, paraffin oil, and glass fiber are mixed.

It is also possible to appropriately blend colorants, antioxidants, ultraviolet absorbers, flame retardants, fillers, antistatic agents, etc. into the synthetic resin composition of the present invention.

The present invention will be explained below with reference to examples.
0 Example-1 ABS resin, silicon dioxide (or activated carbon), oil and glass fiber were processed using a shaft extruder (20 mm) manufactured by Tanabe Plastic Co., Ltd.
0° C.) to obtain Compositions 1 to 8.

In addition, various test pieces were obtained using an IS 90B injection molding machine (200°C) manufactured by Toshiba Machinery Co., Ltd. and used for evaluation. .

Complete table of composition evaluation results of the composition - IK is shown.

oABs Resin Powdered ABS gum resin consisting of 25% by weight of acrylonitrile, 10% by weight of butadiene rubber and 65% by weight of styrene 〇Silicon dioxide ■ Hydrous diacid f Bisilicon (S i 02 ・nH20)S
i0293 weight ratio or higher weight specific gravity 120-160y/M,
Specific surface area 170-210 m'/y ■Anhydrous silicon dioxide (Sin2) S102100M quantity 0 activity Carbon specific surface area 600-800 m'/y, bulk specific gravity 380
~450 no/l O glass fiber (bound with silane-based sizing agent) Average fiber length 63, fiber diameter 9μ 0 Oil ■Paraffin oil specific gravity 0.8647, pour point -15℃, viscosity (989) ℃)
5.18Cst, viscosity specific gravity constant Q, 7R96, C(A)
: 3%, C(to): 27%, C(Plnia 0% ■Aromatic oil specific gravity 1.0 O59, pour point 15℃, viscosity (98.9℃)
) 32.63 Cst, viscosity specific gravity constant 0.954 F
t, C (~: 39%, C (t) = 29%, C (P): 3
2% ■ Naphthenic oil specific gravity Q, 9051'l, pour point -20℃, viscosity (98
, 9℃) 10.36Cst, viscosity specific gravity constant 0.1'+
417, C Prisoner Near Section, C Kume D: 39 Chi, C(P): 54
Antistatic agent Dasper 125B manufactured by Miyoshi Oil Co., Ltd. Example-2 ABS resin, heat-resistant ABS resin, ABS resin, AAS resin, silicon dioxide, paraffin oil and glass fiber were processed using a shaft extruder (200°C) manufactured by Tanabe Planutik Co., Ltd. The mixture was melt-kneaded at once to obtain compositions (A 9-22).

The composition was evaluated in the same manner as in Example-1.

The composition and evaluation results of the composition are shown in Table-2.

0 Synthetic resin■ ABS resin Pellet-shaped AB consisting of 23% by weight of acrylonitrile, 10% by weight of butadiene rubber, and 67% by weight of styrene.
S Resin Heat-resistant ABS resin - 1 Pellet heat-resistant ABS made of 25% by weight of acrylonitrile, 10% by weight of butadiene rubber, 20% by weight of styrene and 45% by weight of α-methylstyrene, [Resin ■ Heat-resistant ABSFE resin - 2 Acrylonitrile 10 weight ratio, butadiene rubber 10 weight ratio, styrene amount ratio weight ratio, N-phenylmaleimide 1
Pellet-shaped heat-resistant ABS resin consisting of 5% by weight.

■AESAB S resin A pellet-shaped ABS resin consisting of 23% by weight of lonitrile, 10% by weight of ethylene propylene rubber, and 67% by weight of styrene.

■A A S Resin Pellet-shaped AA resin consisting of 25% by weight of acrylonitrile, 10ff of acrylic ester rubber (a%, and 65N of styrene).

〇Silicon dioxide: Hydrous silicon dioxide (S i02 ・nH20) Same product as Example-1 0 Glass fiber: Same product as Example-1 0 Paraffin oil: Same product as Example-1 ・: Mi-sliding custom-made taper After setting a steel ball with a diameter of 11+s in place of the wear ring of the wear tester, a 200 kg weight was applied and the speed was set at 72 rpm.
Then, rotate the 3-brain floating test piece 5000 times.

Determine the amount of wear on the test piece after sliding by the depth of the trajectory. Depth of the trajectory...Super roughness meter manufactured by Tokyo Seimitsu Co., Ltd. When tapping a 4mm diameter screw on a 4mm diameter boss, the tightening torque until it slips or breaks is measured and evaluated using a torque screwdriver.

<Effects of the Invention> The synthetic resin composition of the present invention is a material that is excellent in tapping strength, rigidity, workability, coloring property, and antistatic performance as well as being suitable for custom sliding applications.

Furthermore, in the present invention, an inexpensive styrene resin can be used instead of the expensive base polymer that has been conventionally used, and the shape of the resin is not limited to powder, but may also be in the form of a pellet. Furthermore, since no special kneading machine is required, an inexpensive material can be provided.

Claims (1)

Claims: 1) A synthetic resin composition comprising 100 parts by weight of a synthetic resin, 1 to 20 parts by weight of silicon dioxide, 1 to 30 parts by weight of paraffin oil, and 1 to 20 parts by weight of glass fiber. 2) Claim 1, wherein the silicon dioxide is fine particulate hydrated silicon dioxide represented by SiO_2.nH_2O.
Synthetic resin composition described in .