JPH03215545A - Housing member of office automation appliance - Google Patents

Abstract

PURPOSE:To obtain the title member improved in injection moldability, heat resistance and impact resistance by injection-molding a composition comprising a specified chlorinated vinyl chloride resin, a bisamide compound and an impact modifier. CONSTITUTION:A composition is obtained by mixing 100 pts.wt. chlorinated vinyl chloride resin of a degree of chlorination of 62-68wt.% and a degree of polymerization of 400-800 with 4-15 pts.wt. bisamide compound of the formula (wherein R is 12-23C alkyl or alkyl whose hydrogen atoms are replaced by hydroxyl groups; and n is 1-10), 5-20 pts.wt. impact modifier (e.g. ABS resin), 0.05-0.5 pt.wt. UV absorber (e.g. benzophenone) and optionally a lubricant, a heat stabilizer, a filler, a pigment, etc. This composition is injection-molded at a barrel temperature of 160-200 deg.C.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is directed to office automation (hereinafter referred to as OA).
The present invention relates to an equipment hacking member.

(Prior art) Vinyl chloride wood 81 has been widely used as a material for molded products, but because of its poor heat resistance, when used as a breaking material for OA4lI equipment, it may be exposed to high temperatures during transportation or storage. However, they had the disadvantage of being thermally deformed when used near a heat source. As a way to improve this shortcoming,
A method of post-chlorinating vinyl chloride resin has been proposed.

OA equipment removal parts have complex shapes! Because of the high demand, injection molding is generally performed, but when vinyl chloride resin is post-chlorinated, the melt viscosity of the resin increases, making injection molding difficult.

Therefore, methods such as lowering the polymerization degree of the resin or adding a large amount of plasticizer to the resin have been used, but when the polymerization degree of the resin is lowered, the mechanical properties of the resin are significantly reduced, and the resin If a large amount of plasticizer is added to the resin, there are drawbacks such as the heat resistance of the resin being significantly impaired.

Further, JP-A-55-84347 describes a 141 composition consisting of a vinyl chloride resin, curcum, and an amide compound, and states that it has improved thermal stability and processability. However, since talc is added in a large amount of 20 to 30 parts by weight to 100 parts by weight of vinyl chloride resin, and the amide compound is added in a small amount of 1 to 3 parts by weight, it is not suitable for use as impact resistance or as a housing member for OA equipment. Impact resistance is insufficient. When chlorinated vinyl chloride resin was used as a vinyl chloride-based column resin, K was still 17 and lacked fluidity, resulting in burns during injection molding and poor filling properties. .

(A'M to be Solved by the Invention) An object of the present invention is to produce a resin composition by injection molding that has good I dynamic characteristics, and therefore good injection moldability. OA with excellent heat resistance, impact resistance, etc.
There is a VC that provides equipment components.

(Means for solving the problem) The degree of chlorination is 62 to 681% by weight. For chlorinated vinyl chloride resin with a chlorination degree of 62%, the heat resistance of the resin is not much different from vinyl chloride #1 resin (chlorination degree of about 57%), and is 68! This is because chlorinated vinyl chloride resin exceeding the amount of % is likely to be thermally decomposed. In addition, the degree of chlorinated vinyl chloride resin is 400 to 80.
There is 0'''C. Ekima of chlorinated vinyl chloride resin is 400
If the degree of salinity of the chlorinated pinyl chloride fat exceeds 800, the flow characteristics of the compound will decrease and the injection moldability will deteriorate. be.

Bisamide compound used in the present invention (bl fl general formula (
It is a compound represented by Il, (RCONH)2(CH!)n-
In formula (I), R represents an alkyl group having 12 to 23 carbon atoms or an alkyl group in which the hydrogen of the alkyl group is substituted with a hydroxyl group, and n is 1 to 10! Indicates 1 loss. If the number of carbon atoms in R is 24 or more, < tl n is 11 or more, the gelation time of the compound becomes longer and the chlorinated vinyl chloride resin becomes more susceptible to thermal decomposition.

Examples of the above-mentioned bisamide compound tbl include methylene bisstearin amide, ethylene biscarinamide, ethylene biscrarylic amide, ethylene bis stearic acid amide, ethylene bis isostearin amide, ethylene bis (12-hydroxy) stearin amide, Ethylene bisbehene Hy=do, hexamethylene pistearic acid amide, hexamethylene bis(12-
Hydroxy) stearin amide, hexamethylene bisbehen amide F, etc. may be used alone or in combination of two or more.

Impact modifier (c) I′i used in the present invention, general Kjj
It is a rubber component used as a modifier for i-vinyl resin, such as MBS side resin, ABS resin, chlorinated polyethylene, etc.

The composition of the present invention consists of the above-mentioned chlorinated vinyl chloride resin (a), bisamide compound ib), and impact modifier Lcl, but injection moldability is improved if the amount of bisamide compound (bl) added is small. If the amount of Cl added decreases, the impact resistance of the molded product will decrease, and if the amount increases, the mechanical properties will decrease. To 100 parts by weight of the vinyl chloride resin, 4 to 15 parts by weight of the bisamide compound (tb) is added, h. 5 to 20 parts by weight of the impact modifier (c) is added.

The OA/equipment removal member of the present invention is obtained by injection molding the above-mentioned compound, and since OA equipment removal members are generally required to have weather resistance, it is preferable to add an ultraviolet absorber.

As the ultraviolet absorber, for example, salicylic acid ester, penzophenone, salicylate, penzotriazole, and other ultraviolet absorbers are used, and the amount added is 0.05 to α5 per 100 parts by weight of chlorinated vinyl chloride resin.
This is the irises section.

In addition, necessary KF6, lubricants such as stearic acid and moncoal wax, heat stabilizers such as stearic acid, stearic acid caruncum, diptyltin dimale}, antioxidants, glass fibers, charcoal caruncum, talc, etc. filler,
Pigments, colorants, processing aids, etc. may also be used.

Any method may be used to produce the above-mentioned compound,
For example, chlorinated vinyl chloride resin tal, bisamide compound (BL) and impact modifier (CL) may be supplied to a spar mixer, blender, etc., and mixed with stirring.

L compound f: injection molded OA equipment housing member t
- Any known injection molding method may be employed to obtain the
Preferably, injection molding is performed at a parel temperature of 160 to 200°C.

(Example) Next, embodiments of the present invention will be described.

Examples 1 to 5, Comparative Examples 1 to 3 Predetermined amounts of chlorinated vinyl chloride resins (1 degree: 500, chlorination degree: 651) shown in Table 1. Pisamide compound, M
BSm fat (manufactured by Kureha Kagaku Co., Ltd., BTA-mN), ultraviolet absorber (2-hydroquino 4-n-octylbenzoenone, Kyodo Yakuhin Co., Ltd. Biosorg 130) and dioctyltin mercagut (Nitto Kasei Co., Ltd. ITVs-8831) 21
i parts, dioctyltin malate polymer (LJLNI [
Company%! TVS-8 8 L 3) 1! Quantity part, lubricant (
Manufactured by Hoechst Javan Co., Ltd., WAX-OP) l subunit and titanium oxide (Teikoku Kakosha 11JR-403) 37@@
The mixture was fed into a Henschel mixer and mixed for 5 minutes at 80°C to obtain a blend.

The obtained mixture was fed to a twin-screw kneading extruder, and the maximum temperature was 1.
The mixture was kneaded at 90°C, extruded, and pelletized using a pelletizer. The obtained pellet was fed to an injection molding machine (Toshiba Machine Is-850E) equipped with an OA hacking mold, and the injection pressure was 1840/1 and the molding temperature was 170-18.
0°C, screw rotation speed 6 0 rpm s mold temperature 3
Under injection conditions of 0°C, length: 400fi, width: 600M, thickness: 3
were observed, and the results are shown in Table 1.

The above formulation was tested using a Koka type flow tester (Dylom
1 m 125 ) K was supplied, and the melt viscosity was measured under the conditions of 190° C. and 160 instant/d, and the results were shown in the first barley.

The obtained plate-like body was cut and press-formed at 190°C.
2. Obtain a press plate and use the obtained press plate with a thickness of 6.2 mm to make JIS-K7 207 (18.5K9/c
lilt: The heat resistance (HDT) was measured according to the method, and the Nyaruby impact strength was measured according to JIS-K7111 using the obtained press body with a thickness of 4 mm, and the results are shown in vAl barley.

My father used a mercury lamp for color fastness testing (JIS
An irradiation device (horizontal distance) with a C7709 E39 designation) was supplied, and the yellowing after 100 hours was visually determined in accordance with JIS K5400 (color stability). .

(Left below) No. 1 Wheat ωEBSA: Ethylene bisstearamide EB
HSA: Ethylene bis(12-hydroquine) stearic acid amide EBBA: Ethylene bis behenic acid amide HB
SA: Hexamethylene bisstearyl/Sameamide SG
E: Heptanostearic acid glyceride (result of the invention) The composition of the OA equipment/cushion member of the present invention is as described above, and a large amount of bisamide compound and impact modifier are added to a specific chlorinated vinyl chloride resin. Since the added compound is molded by injection molding, it has excellent flow characteristics, generates little shear heat during injection molding, and can be molded with good filling properties.
It has a clean appearance with no stains or flow marks on the surface of the breaking part, and has excellent heat resistance and impact resistance, making it suitable for office equipment such as computer cabinets and keyboards.
It can be suitably used as a device housing member.

Claims (1)

[Claims] 1. (a) The degree of chlorination is 62 to 68% by weight and the degree of polymerization is 40.
100 parts by weight of a chlorinated vinyl chloride resin having a molecular weight of 0 to 800, (b) a bisamide compound represented by the general formula (I) 4
~15 parts by weight and (RCONH)_2(CH_3)_n...(I) (In the formula, R represents an alkyl group having 12 to 23 carbon atoms or an alkyl group in which the hydrogen of the alkyl group is substituted with a hydroxyl group, and n
represents an integer from 1 to 10. ) (c) An office automation equipment housing member formed by injection molding a formulation comprising 5 to 20 parts by weight of an impact modifier.