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JPH0446985B2 - - Google Patents

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Publication number
JPH0446985B2
JPH0446985B2 JP59267026A JP26702684A JPH0446985B2 JP H0446985 B2 JPH0446985 B2 JP H0446985B2 JP 59267026 A JP59267026 A JP 59267026A JP 26702684 A JP26702684 A JP 26702684A JP H0446985 B2 JPH0446985 B2 JP H0446985B2
Authority
JP
Japan
Prior art keywords
weight
resin
silicon dioxide
composition
styrene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP59267026A
Other languages
Japanese (ja)
Other versions
JPS61145253A (en
Inventor
Koichi Nakayama
Ikuo Tsukino
Yutaka Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumika Polycarbonate Ltd
Original Assignee
Sumika Polycarbonate Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumika Polycarbonate Ltd filed Critical Sumika Polycarbonate Ltd
Priority to JP26702684A priority Critical patent/JPS61145253A/en
Publication of JPS61145253A publication Critical patent/JPS61145253A/en
Publication of JPH0446985B2 publication Critical patent/JPH0446985B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】[Detailed description of the invention]

<発明の目的> 本発明は、摺動特性に優れる樹脂組成物に関す
る。 従来より、合成樹脂に潤滑油を含有させること
により摺動特性の改善された組成物が得られるこ
とが知られている。しかしながら、潤滑油を多量
に含有させることは困難であり、このため粉末状
のポリアセタール又はポリアミドを用いる方法
(特公昭46−42217、特公昭46−5321)が提案され
ているが、製造工程が繁雑になるばかりでなく含
有量にも制限がある。又、潤滑油をグラフアイト
や活性炭などの比表面積の大きい物質と併用する
方法(特開昭50−101051)が提案されているが、
通常の混練機である一軸押出機では潤滑油が分離
するため、特殊な押出機を必要とするといつた製
造上の制限がある。又、グラフアイトや活性炭を
用いると組成物が黒色となり白色や他の鮮明な色
に着色することが困難である。 さらに、従来の潤滑油含有合成樹脂組成物にお
いて用いられるベースポリマーは、高価なポリア
セタール、ポリアミド、ポリカーボネート、ポリ
ブチレンテレフタレートなどであつたため、組成
物もひじように高価なものとなつていたのが実情
である。 本発明者らは、かかる問題点に鑑み鋭意研究し
た結果、特定の二酸化ケイ素とパラフイン系オイ
ルとを特定比率にて併用することにより、ポリア
セタールなどの従来より用いられているベースポ
リマーはもとよりポリスチレン、ABS樹脂、
AES樹脂などの安価なポリマーにおいても優れ
た摺動特性に優れる樹脂組成物が得られることを
見出し、本発明に到達したものである。さらに、
本発明の組成物は、通常の混練機である一軸押出
機においても容易に製造し得るとともに、黒色以
外の鮮明に着色することも容易である。 以下に、本発明について詳細に説明する。 <発明の構成> 本発明において用いられるゴム強化スチレン系
樹脂としては、ゴム強化ポリスチレン、ABS樹
脂、MBS樹脂、AES樹脂、AAS樹脂、ACS樹脂
などが挙げられ、1種又は2種以上用いることが
できる。また、これらゴム強化スチレン系樹脂の
一部を従来より摺動材料のベースポリマーとして
用いられているポリアセタール、ポリアミド、ポ
リカーボネート、ポリブチレンテレフタレートは
もちろんのこと、塩化ビニル樹脂、ポリスチレ
ン、スチレン−無水マレイン酸樹脂、スチレン−
マレイミド樹脂、ポリエチレン、ポリプロピレ
ン、ポリフエニレンオキサイドから選ばれた1種
以上の樹脂と置換することも可能である。 なお、スチレン系樹脂においては、スチレンの
一部又は全部をアルキル置換スチレン(α−メチ
ルスチレン、p−メチルスチレン等)に置き替え
ることもできる。 含水二酸化ケイ素とは、一般式SiO2・nH2Oで
示される化合物である。通常、10〜50mμの平均
一次粒子径(0.5〜75μの平均二次粒子径)を有す
る微粒子である。特に組成物の加工性ならびに帯
電防止性の面より水分(105℃,2時間)が2〜
10重量%の含水二酸化ケイ素(SiO2・nH2O)が
好ましい。 含水二酸化ケイ素の用いられる量は、ゴム強化
スチレン系樹脂100重量部当り1〜20重量部であ
る。1重量部未満では摺動特性が、又20重量部を
超えると機械的強度が劣るので好ましくない。 一般に潤滑油は、その構造よりアロマテツク系
オイル、ナフテン系オイルおよびパラフイン系オ
イルに分類される。又、それらは天然オイルおよ
び合成オイルに限らず、その他の系を含むもので
あり、通常、アロマテツク系オイルとはアロマテ
ツク炭素が35重量%以上のもの、ナフテン系オイ
ルとはナフテン環炭素が30〜45重量%のもの、お
よびパラフイン系オイルとはパラフイン鎖炭素が
50重量%以上のものを示す。 本発明においては、パラフイン系オイルが必須
成分であり、アロマテツク系オイルおよび/又は
ナフテン系オイルでは、本発明の目的とする組成
物は得られない。 パラフイン系オイルの含有量は、ゴム強化スチ
レン系樹脂100重量部当り1〜30重量部である。
1重量部未満では摺動特性が、又30重量部を超え
ると硬度および耐熱性が劣るので好ましくない。 また、摺動特性ならびに機械的強度、さらには
組成物の製造面より、上記の含水二酸化ケイ素対
パラフイン系オイルの重量比は1:1〜3である
ことが必要である。 本発明の組成物は、ゴム強化スチレン系樹脂、
含水二酸化ケイ素およびパラフイン系オイルを公
知の一軸押出機、二軸押出機、バンバリーミキサ
ー、デイスク式の一軸又は二軸混練押出機などで
溶融混練することにより得られる。 用いられる合成樹脂の形状には何ら制限はな
く、粉末状、ビーズ状、ペレツト状、ダイス丈等
任意の形状のものを用いることができる。 さらに、混練時における合成樹脂、含水二酸化
ケイ素およびパラフイン系オイルの混練順序には
何ら制限はなく、三成分の一括混練、二成分の予
備混練後残る成分を混練する方法などが挙げられ
る。 なお、本発明の組成物に対し、着色剤、抗酸化
剤、紫外線吸収剤、難燃剤、充填剤、帯電防止剤
等を適宜配合することも可能である。 実施例1および比較例 粉末状ABS樹脂(アクリロニトリル25重量%、
ブタジエン系ゴム10重量%、スチレン65重量%)、
二酸化ケイ素(又は活性炭)およびオイルを田辺
プラスチツク社製一軸押出機(200℃)にて一括
溶融混練し、組成物1〜8を得た。 なお、組成物3と5には帯電防止剤を添加し
た。 得られた組成物より東芝機械社製IS90B射出成
形機(200℃)にて各種試験片を作成し、評価に
供した。 組成物の組成および評価結果を表−1に示す。 Γ二酸化ケイ素 含水二酸化ケイ素(SiO2・nH2O) SiO293重量%以上、嵩比重120〜160g/、
比表面積170〜210m2/g 無水二酸化ケイ素(SiO2) SiO2100重量% Γ活性炭 比表面積600〜800m2/g、嵩比重380〜450g/
Γオイル パラフイン系オイル 比重0.8647、流動点−15℃、粘度(98.9℃)
5.18Cst、粘度比重恒数0.7896、C(A):3%、
C(N):27%、C(P):70% アロマテツク系オイル 比重1.0059、流動点15℃、粘度(98.9℃)
32.63Cst、粘度比重恒数0.9548、C(A):39%、
C(N):29%、C(P):32% ナフテン系オイル 比重0.9058、流動点−20℃、粘度(98.9℃)
10.36Cst、粘度比重恒数0.8417、C(A):7%、
C(N):39%、C(P):54% Γ帯電防止剤 ミヨシ油脂社製 ダスパー125B
<Object of the Invention> The present invention relates to a resin composition having excellent sliding properties. It has been known that a composition with improved sliding properties can be obtained by incorporating a lubricating oil into a synthetic resin. However, it is difficult to contain a large amount of lubricating oil, and for this reason a method using powdered polyacetal or polyamide has been proposed (Japanese Patent Publication No. 46-42217, Japanese Patent Publication No. 46-5321), but the manufacturing process is complicated. Not only that, but there are also limits on the content. In addition, a method has been proposed in which lubricating oil is used in combination with a substance with a large specific surface area such as graphite or activated carbon (Japanese Patent Application Laid-open No. 101051/1983).
Since lubricating oil separates in a single screw extruder, which is a common kneading machine, there are manufacturing limitations such as the need for a special extruder. Furthermore, when graphite or activated carbon is used, the composition becomes black, making it difficult to color it white or other vivid colors. Furthermore, the base polymers used in conventional lubricating oil-containing synthetic resin compositions were expensive polyacetals, polyamides, polycarbonates, polybutylene terephthalates, etc., making the compositions extremely expensive. It is. As a result of intensive research in view of these problems, the present inventors have found that by using a specific silicon dioxide and paraffin oil together in a specific ratio, not only conventionally used base polymers such as polyacetal but also polystyrene, ABS resin,
The present invention was achieved by discovering that a resin composition with excellent sliding properties can be obtained even with inexpensive polymers such as AES resin. moreover,
The composition of the present invention can be easily produced using a single-screw extruder, which is a common kneading machine, and can also be easily colored in a color other than black. The present invention will be explained in detail below. <Structure of the Invention> The rubber-reinforced styrene resin used in the present invention includes rubber-reinforced polystyrene, ABS resin, MBS resin, AES resin, AAS resin, ACS resin, etc., and one or more types may be used. can. In addition, some of these rubber-reinforced styrene resins can be used as base polymers for sliding materials, such as polyacetal, polyamide, polycarbonate, and polybutylene terephthalate, as well as vinyl chloride resin, polystyrene, and styrene-maleic anhydride. Resin, styrene
It is also possible to substitute one or more resins selected from maleimide resin, polyethylene, polypropylene, and polyphenylene oxide. In addition, in the styrene resin, part or all of the styrene can be replaced with alkyl-substituted styrene (α-methylstyrene, p-methylstyrene, etc.). Hydrous silicon dioxide is a compound represented by the general formula SiO 2 .nH 2 O. Usually, they are fine particles having an average primary particle size of 10 to 50 μm (average secondary particle size of 0.5 to 75 μm). In particular, from the viewpoint of processability and antistatic properties of the composition, moisture (105℃, 2 hours) is
10% by weight of hydrated silicon dioxide (SiO 2 .nH 2 O) is preferred. The amount of hydrated silicon dioxide used is 1 to 20 parts by weight per 100 parts by weight of rubber reinforced styrenic resin. If it is less than 1 part by weight, the sliding properties will deteriorate, and if it exceeds 20 parts by weight, the mechanical strength will deteriorate, which is not preferable. Generally, lubricating oils are classified into aromatic oils, naphthenic oils, and paraffinic oils based on their structure. In addition, these oils are not limited to natural oils and synthetic oils, but also include other types. Usually, aromatic oils are those containing 35% by weight or more of aromatic carbon, and naphthenic oils are those containing 30 to 30% naphthene ring carbon. 45% by weight and paraffinic oils have paraffin chain carbons.
Indicates 50% by weight or more. In the present invention, paraffinic oil is an essential component, and the composition targeted by the present invention cannot be obtained with aromatic oil and/or naphthenic oil. The content of paraffin oil is 1 to 30 parts by weight per 100 parts by weight of the rubber-reinforced styrene resin.
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 heat resistance will be poor. Furthermore, from the viewpoint of sliding properties and mechanical strength, as well as the production of the composition, it is necessary that the weight ratio of the above-mentioned hydrous silicon dioxide to paraffinic oil be 1:1 to 3. The composition of the present invention comprises a rubber-reinforced styrenic resin,
It is obtained by melt-kneading hydrous silicon dioxide and paraffinic oil using a known single-screw extruder, twin-screw extruder, Banbury mixer, disc-type single-screw or twin-screw kneading extruder, or the like. There are no restrictions on the shape of the synthetic resin used, and any shape such as powder, beads, pellets, die length, etc. can be used. Furthermore, there is no restriction on the order of kneading the synthetic resin, hydrous silicon dioxide, and paraffinic oil during kneading, and methods include methods of kneading the three components all at once, kneading the remaining components after preliminary kneading of the two components, and the like. In addition, it is also possible to appropriately blend colorants, antioxidants, ultraviolet absorbers, flame retardants, fillers, antistatic agents, etc. into the composition of the present invention. Example 1 and Comparative Example Powdered ABS resin (acrylonitrile 25% by weight,
(10% by weight of butadiene rubber, 65% by weight of styrene),
Silicon dioxide (or activated carbon) and oil were melt-kneaded all at once in a single-screw extruder (200°C) manufactured by Tanabe Plastics Co., Ltd. to obtain compositions 1 to 8. Note that an antistatic agent was added to Compositions 3 and 5. Various test pieces were prepared from the obtained composition using an IS90B injection molding machine manufactured by Toshiba Machine Co., Ltd. (200°C) and were subjected to evaluation. The composition and evaluation results of the composition are shown in Table-1. ΓSilicon dioxide Hydrous silicon dioxide (SiO 2・nH 2 O) SiO 2 93% by weight or more, bulk specific gravity 120-160g/,
Specific surface area 170-210m 2 /g Anhydrous silicon dioxide (SiO 2 ) SiO 2 100% by weight Γ activated carbon Specific surface area 600-800m 2 /g, bulk specific gravity 380-450g/
Γ oil paraffin oil specific gravity 0.8647, pour point -15℃, viscosity (98.9℃)
5.18Cst, viscosity specific gravity constant 0.7896, C(A): 3%,
C(N): 27%, C(P): 70% Aromatech oil Specific gravity 1.0059, pour point 15℃, viscosity (98.9℃)
32.63Cst, viscosity specific gravity constant 0.9548, C(A): 39%,
C(N): 29%, C(P): 32% Naphthenic oil Specific gravity 0.9058, Pour point -20℃, Viscosity (98.9℃)
10.36Cst, viscosity specific gravity constant 0.8417, C(A): 7%,
C(N): 39%, C(P): 54% Γ Antistatic agent Dasper 125B manufactured by Miyoshi Yushi Co., Ltd.

【表】 実施例2および比較例 ABS樹脂、耐熱ABS樹脂、AES樹脂、AAS樹
脂、二酸化ケイ素(又は炭素カルシウム)および
パラフイン系オイル(又は脂肪酸エステル)を田
辺ブラスチツク社製一軸押出機(200℃)にて一
括溶融混練し、組成物(No.9〜20)を得た。 実施例1と同様にして組成物を評価した。 組成物の組成および評価結果を表−2に示す。 Γ合成樹脂 ABS樹脂 アクリロニトリル23重量%、ブタジエン系ゴ
ム10重量%およびスチレン67重量%からなるペ
レツト状ABS樹脂。 耐熱ABS樹脂−1 アクリロニトリル25重量%、ブタジエン系ゴ
ム10重量%、スチレン20重量%およびα−メチ
ルスチレン45重量%からなるペレツト状耐熱
ABS樹脂。 耐熱ABS樹脂−2 アクリロニトリル10重量%、ブタジエン系ゴ
ム10重量%、スチレン65重量%、N−フエニル
マレイミド15重量%からなるペレツト状耐熱
ABS樹脂。 AES樹脂 アクリロニトリル23重量%、エチレンプロピ
レン系ゴム10重量%、スチレン67重量%からな
るペレツト状AES樹脂。 AAS樹脂 アクリロニトリル25重量%、アクリルエステ
ル系ゴム10重量%、スチレン65重量%からなる
ペレツト状AAS樹脂。 Γ二酸化ケイ素:含水二酸化ケイ素(SiO2
nH2O)実施例−1と同一品 ●パラフイン系オイル: 実施例−1と同一品 Γ脂肪酸エステル:ステアリン酸エステル
[Table] Example 2 and Comparative Examples ABS resin, heat-resistant ABS resin, AES resin, AAS resin, silicon dioxide (or calcium carbon), and paraffin oil (or fatty acid ester) were processed using a single-screw extruder manufactured by Tanabe Blastik Co., Ltd. (200°C) The mixture was melt-kneaded at once to obtain compositions (Nos. 9 to 20). 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. Γ Synthetic Resin ABS Resin Pellet-shaped ABS resin consisting of 23% by weight acrylonitrile, 10% by weight butadiene rubber, and 67% by weight styrene. Heat-resistant ABS resin-1 Pellet-like heat-resistant resin consisting of 25% by weight of acrylonitrile, 10% by weight of butadiene rubber, 20% by weight of styrene, and 45% by weight of α-methylstyrene.
ABS resin. Heat-resistant ABS resin-2 Pellet-like heat-resistant resin consisting of 10% by weight of acrylonitrile, 10% by weight of butadiene rubber, 65% by weight of styrene, and 15% by weight of N-phenylmaleimide.
ABS resin. AES resin Pellet-shaped AES resin consisting of 23% by weight of acrylonitrile, 10% by weight of ethylene propylene rubber, and 67% by weight of styrene. AAS resin A pellet-shaped AAS resin consisting of 25% by weight acrylonitrile, 10% by weight acrylic ester rubber, and 65% by weight styrene. Γ Silicon dioxide: Hydrous silicon dioxide (SiO 2
nH 2 O) Same product as Example-1 Paraffin oil: Same product as Example-1 Γ Fatty acid ester: Stearic acid ester

【表】 <発明の効果> 本発明の組成物は、摺動特性はもちろんのこ
と、機械的特性、加工性、着色性、帯電防止性能
に優れ材料である。 また、本発明においては、従来用いられていた
高価なベースポリマーでなく、安価なスチレン系
樹脂を用いることができ、樹脂の形状も粉末状に
限らずペレツト状のものも用いることができる。
さらに、特殊な混練機を必要とすることもないた
め、安価な材料を提供出来るものである。
[Table] <Effects of the Invention> The composition of the present invention is a material that is excellent not only in sliding properties but also in mechanical properties, processability, colorability, and antistatic performance. 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 pellets can also be used.
Furthermore, since no special kneading machine is required, an inexpensive material can be provided.

Claims (1)

【特許請求の範囲】[Claims] 1 ゴム強化スチレン系樹脂100重量部当り、
SiO2・nH2Oで示される微粒子の含水二酸化ケイ
素1〜20重量部とパラフイン系オイル1〜30重量
部含有してなり、かつ、含水二酸化ケイ素対パラ
フイン系オイルの重量比が1:1〜3であること
を特徴とする摺動特性に優れる樹脂組成物。
1. Per 100 parts by weight of rubber-reinforced styrene resin,
Contains 1 to 20 parts by weight of fine particles of hydrated silicon dioxide represented by SiO 2 .nH 2 O and 1 to 30 parts by weight of paraffinic oil, and the weight ratio of hydrated silicon dioxide to paraffinic oil is 1:1 to 1. 3. A resin composition having excellent sliding properties.
JP26702684A 1984-12-18 1984-12-18 Resin composition having excellent abrasion resistance Granted JPS61145253A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26702684A JPS61145253A (en) 1984-12-18 1984-12-18 Resin composition having excellent abrasion resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26702684A JPS61145253A (en) 1984-12-18 1984-12-18 Resin composition having excellent abrasion resistance

Publications (2)

Publication Number Publication Date
JPS61145253A JPS61145253A (en) 1986-07-02
JPH0446985B2 true JPH0446985B2 (en) 1992-07-31

Family

ID=17439021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26702684A Granted JPS61145253A (en) 1984-12-18 1984-12-18 Resin composition having excellent abrasion resistance

Country Status (1)

Country Link
JP (1) JPS61145253A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5170856B2 (en) * 2006-12-28 2013-03-27 Ntn株式会社 Conductive sliding material composition

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5649946B2 (en) * 1973-11-21 1981-11-26

Also Published As

Publication number Publication date
JPS61145253A (en) 1986-07-02

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