JPS61188472A - Electrically conductive coating agent composition - Google Patents

Abstract

PURPOSE:To obtain an electrically conductive coating agent which gives a coating film having excellent flame retardance and resistance to wear, impact, corrosion and weather, by adding fine carbon particles to a polymer cement consisting of cement, an aggregate and a synthetic resin emulsion. CONSTITUTION:A coating agent compsn. is obtd. by adding 5-25pts.wt. fine carbon particles composed of at least 90wt% 325-mesh particles to 100pts.wt. polymer cement consisting of 45-60wt% cement selected from among portland cement, blast furnace cement and alumina cement, 5-30wt% aggregate and 20-35wt% (on a solid basis) synthetic resin emulsion. Examples of the aggregates are siliceous sand and siliceous stone powder having excellent resistance to wear and chemicals. The aggregates may be used either alone or as a mixture thereof. Particularly preferred example of the synthetic resin emulsion is acrylic resin emulsion.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、導電性塗材組成物に関し、更に詳しくは、屋
外の石油産業施設や石油運搬タンカー等に好都合に適用
しうる帯電防止性の無機質系塗材組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a conductive coating composition, and more particularly, to an antistatic coating composition that can be conveniently applied to outdoor oil industry facilities, oil transport tankers, etc. The present invention relates to an inorganic coating material composition.

［従来の技術］　　　・ 従来、導電性塗料は数多く知られているが、塗膜の耐摩
耗性や耐衝撃性が劣り、また難燃性や付着性にも難点が
あるため□、実際に、石油施設や石油タンカーなどに採
用される例は極めて少なく。[Conventional technology] - Many conductive paints have been known, but the paint film has poor abrasion resistance and impact resistance, and also has drawbacks in flame retardancy and adhesion. There are very few examples of this being used in oil facilities or oil tankers.

採用されたとしても防災上満足しうる塗層は得られてい
ない。　　　　゛ ［発明が解決しようとする問題点］ 本発明は１人体に帯電する静電気□のスパークによる火
災や爆発災害の発生を予防しうる塗料材料であって、良
好な導電性を有し、しかも耐摩耗性。Even if it is adopted, a coating layer that is satisfactory for disaster prevention has not been obtained. [Problems to be Solved by the Invention] The present invention provides a coating material that can prevent fires and explosions caused by sparks of static electricity □ charged on the human body, which has good conductivity and is durable. Abrasive.

耐衝撃性、防錆能、耐候性及び難燃性等に優れた塗膜を
与える極めて集用的導電性塗材組成物を１供しようとす
るものであする。The purpose of this invention is to provide an extremely versatile conductive coating material composition that provides a coating film with excellent impact resistance, rust prevention ability, weather resistance, flame retardance, etc.

［問題点を解決するための手段］ 本発明者らは、上記のような石油施設や石油タンカー等
における実情に鑑み、静電気によるスパークが重大な結
果を招くような極めて危険な部所に塗布して、その部所
の人体における静電気を効果的に除去しうる導電性塗層
を提供する塗料材料について研究を重ねた結果、特に、
望ましい各種諸物性を兼備した優れた導電性塗膜を与え
る実用的組成物を開発した。[Means for Solving the Problems] In view of the actual situation in oil facilities, oil tankers, etc. as described above, the inventors of the present invention have developed a method for applying the product to extremely dangerous areas where sparks caused by static electricity can lead to serious consequences. As a result of repeated research on paint materials that provide a conductive coating layer that can effectively remove static electricity from those parts of the human body, we found that, in particular,
We have developed a practical composition that provides an excellent electrically conductive coating with various desirable physical properties.

すなわち１本発明は、（ａ）ポルトランドセメント、高
炉セメント並びにアルミナセメントよりなる群から選択
されるセメント４５〜６０重量％、（ｂ）骨材５〜３０
重量％、及び（ｃ）合成樹脂エマルジョン（固形分）２
０〜３５重量％よりなるポリマーセメントに３２５メツ
シュ下を少なくとも９０重量％含有する微粉状炭素粒子
を、上記ポリマーセメント１００重量部に対し５〜２５
重量部添加してなる導電性塗材組成物を提供する。That is, 1 the present invention comprises: (a) 45 to 60% by weight of cement selected from the group consisting of Portland cement, blast furnace cement, and alumina cement; (b) 5 to 30% by weight of aggregate;
Weight %, and (c) synthetic resin emulsion (solid content) 2
Finely divided carbon particles containing at least 90% by weight of 0 to 35% by weight of carbon particles under 325 mesh are added to the polymer cement consisting of 5 to 25% by weight per 100 parts by weight of the polymer cement.
Provided is a conductive coating material composition in which part by weight of the present invention is added.

本発明におけるポリマーセメントを構成する第１の成分
（ａ）は、無機接合剤であって、ポルトランドセメント
、高炉セメント及びアルミナセメントより選択され、こ
れらは単独種で用いてもよいし、２種以上を混用するこ
ともできる。また、ポリマーセメントの第２の成分（ｂ
）は、通常知られた骨材類を包含するが、好ましい骨材
は、耐摩耗性及び耐薬品性の優れたけい砂、けい石粉類
であって、これら骨材類も単独で、あるいは組み合わせ
て使用することができる。更に、第３の成分（ｃ）は、
合成樹脂エマルジョンであって、特にアクリル系樹脂エ
マルジョンが好ましい。かかる樹脂エマルジョンの形成
に用いられるアクリル単量体としては、例えば、アクリ
ル酸、アクリロニトリル、アクリルアミド、メチルアク
リレート、エチルアクリレート、ブチルアクリレート、
２−エチルへキシルアクリレート、ヒドロキシエチルア
クリレートやそれらに対応するメタクリル系誘導体類、
あるいは２−エトキシエチルメタクリレートなどを挙げ
ることができ、また、これらと共、重合しつる他の単量
体の少量を併用することもできる。エマルジョンは、所
望構成の単量体を水性媒体中で、エマルジョン重合する
ことにより容易に調製することができる。The first component (a) constituting the polymer cement in the present invention is an inorganic binder selected from Portland cement, blast furnace cement, and alumina cement, and these may be used alone or in combination of two or more. You can also mix them. Additionally, the second component of the polymer cement (b
) includes commonly known aggregates, but preferred aggregates are silica sand and silica powder, which have excellent wear resistance and chemical resistance, and these aggregates may be used alone or in combination. can be used. Furthermore, the third component (c) is
Synthetic resin emulsions, particularly acrylic resin emulsions, are preferred. Acrylic monomers used to form such resin emulsions include, for example, acrylic acid, acrylonitrile, acrylamide, methyl acrylate, ethyl acrylate, butyl acrylate,
2-ethylhexyl acrylate, hydroxyethyl acrylate and their corresponding methacrylic derivatives,
Alternatively, 2-ethoxyethyl methacrylate can be used, and a small amount of other polymerizable monomers can also be used together with these. Emulsions can be easily prepared by emulsion polymerization of monomers of desired composition in an aqueous medium.

ポリマーセメントは、上記各成分（ａ）　、　（ｂ）及
び（ｃ）がそれぞれ４５〜６０重量％、５〜３０重量％
及び２０〜３５重量％（合成樹脂エマルジョン中の固形
分として）を配合されてなるものである。The polymer cement contains 45 to 60% by weight and 5 to 30% by weight of each of the above components (a), (b) and (c), respectively.
and 20 to 35% by weight (as solid content in the synthetic resin emulsion).

石灰系セメントであるポルトランドセメント。Portland cement is a lime-based cement.

高炉セメントやアルミナセメントから選択される無機線
分（ａ）は高アルカリ炸で、柄面に不動態皮膜をつくる
ので防錆機能を有し、また鉄面に対して良好な接着性を
示す接合剤である。この成分（ａ）が４５重量％未満で
は、塗膜強度が弱く、また６０重量％を超えると耐摩耗
性が低下するので好ましくない。Inorganic wire (a) selected from blast furnace cement and alumina cement is highly alkaline and forms a passive film on the handle surface, so it has a rust-preventing function and has good adhesion to iron surfaces. It is a drug. If this component (a) is less than 45% by weight, the strength of the coating film will be low, and if it exceeds 60% by weight, the abrasion resistance will decrease, which is not preferable.

また耐摩耗性、耐薬品性の優れたけい砂、けい石粉等の
骨材成分（ｂ）は、５重量％未満では、塗膜の耐摩耗性
と耐薬品性能が低下し、３０重量％を超えると塗膜の強
度が低下する。ので歪、都合である。In addition, if the aggregate component (b), such as silica sand or silica powder, which has excellent abrasion resistance and chemical resistance, is less than 5% by weight, the abrasion resistance and chemical resistance performance of the coating film will decrease. If it exceeds this, the strength of the coating film will decrease. Therefore, distortion is a matter of convenience.

更に、第３の成分（ｃ）の合成樹脂エマルジョンは、骨
材や導電性炭素粒子のバインダーとじて機能すると共に
、得られるセメント硬化層の可とう性と不透水性を向上
させるものであれば、どのような合成樹脂類であっても
よいが、セメント混合性に優れ、耐候性のよい塗膜を与
える点でアクリル系樹脂エマルジョンが特に優れている
。Furthermore, the synthetic resin emulsion of the third component (c) can function as a binder for aggregates and conductive carbon particles, and can improve the flexibility and water impermeability of the resulting cement hardened layer. Although any synthetic resin may be used, acrylic resin emulsions are particularly excellent in that they have excellent cement compatibility and provide a coating film with good weather resistance.

また、導電性塗膜に望ましい所望物性を付与するために
、エポキシ樹脂やウレタン樹脂などの他の樹脂類をポリ
マーセメントに添加して変性することもできる。　　　
　　一 本発明においては、このようなポリマーセメント１００
重量部（固形分）に対し、３２５メツシュ下を少なくと
も９０重量％含有する微粉状炭素°粒子５〜２５重量部
が添加混用される。炭素の添加量が５重量部未満では、
塗材組成物を塗布して得られる塗膜（層）の電気伝導性
が低くて、静電気の除去に望杢しい抵抗値、例えば、１
０３〜１０’Ω程度以下のものが得られず、また２５重
量部を超えると導電性は充分であるが、塗膜の耐水性、
耐衝撃性や耐摩耗性などが著しく低減するので好ましく
ない、好ましい炭素粒子の添加量は１０〜１８重量部、
特に好ましくは１３〜１５重量部である。また、炭素粒
子は、９０重量％以上が３２５メツシュ下の微粉粒度で
あることが重要であって、上記添加配合量範囲で望まし
い導電性の塗膜が提供される。３２５メツシュ下の微粉
粒子が９０重量％より少ないと、塗膜に適切な導電性を
与えるのに大量の添加をしなければならず、塗膜の物性
を低下させるので不都合である。Additionally, other resins such as epoxy resins and urethane resins can be added to the polymer cement to modify it in order to impart desirable physical properties to the conductive coating.
In the present invention, such polymer cement 100
Based on the weight part (solid content), 5 to 25 parts by weight of finely divided carbon particles containing at least 90% by weight of 325 mesh or less are mixed and used. If the amount of carbon added is less than 5 parts by weight,
The electrical conductivity of the coating film (layer) obtained by applying the coating material composition is low, and the desired resistance value for removing static electricity, for example, 1.
If it exceeds 25 parts by weight, the conductivity is sufficient, but the water resistance of the coating film
The preferred amount of carbon particles added is 10 to 18 parts by weight, which is undesirable because it significantly reduces impact resistance and abrasion resistance.
Particularly preferably 13 to 15 parts by weight. Further, it is important that 90% by weight or more of the carbon particles have a fine particle size of 325 mesh or less, and a desirable conductive coating film can be provided within the above-mentioned addition range. If the amount of fine powder particles under the 325 mesh is less than 90% by weight, a large amount must be added to provide adequate conductivity to the coating, which is disadvantageous since it deteriorates the physical properties of the coating.

［作用］ 上記のような構成を有する本発明の塗材組成物は１石油
関連施設や石油タンカー等において、静電気の帯電防止
に必要な導電性の塗膜を所望個所に好都合に形成させる
ことができる。本発明の塗材組成物は、例えば、石油タ
ンカーにおいては、マンホールまわり、出入りハツチ、
計量ハツチ。[Function] The coating material composition of the present invention having the above-mentioned structure can conveniently form a conductive coating film necessary for preventing static electricity at desired locations in petroleum-related facilities, oil tankers, etc. can. The coating material composition of the present invention can be used, for example, around manholes, entrance/exit hatches, etc. in oil tankers.
Measuring hatch.

甲板などの歩行面や階段に塗布して、その塗膜に乗った
人のもつ静電気を効果的に取り除くことができる。この
ような静電気除去のための本発明の無機質系導電性塗材
組成物は、どのような知られた方法で被塗面に適用して
もよく、また形成される塗膜の厚さは、特に制約はない
が、一般に０．５〜１．５　ｒｍ程度、特に０．５〜０
．７ｍが実用上有利に採用される。When applied to walking surfaces such as decks and stairs, it can effectively remove static electricity from people who step on the coating. The inorganic conductive coating material composition of the present invention for removing static electricity may be applied to the surface to be coated by any known method, and the thickness of the coating film formed may be as follows: There are no particular restrictions, but generally about 0.5 to 1.5 rm, especially 0.5 to 0
．． 7m is advantageously adopted in practice.

本発明の組成物は、合成樹脂バインダーにより塗膜に適
度の可どう性が与えられるので、鉄板。The composition of the present invention is suitable for iron plates because the synthetic resin binder imparts appropriate flexibility to the coating film.

木板、コンクリート板等どのような基材に対しても好都
合に適用することができる。本発明の組成物によって形
成された導電性塗膜は、耐摩耗性、耐衝撃性、耐水性、
耐油性、耐候性及び防錆能に優れ、長期にわたって静電
防止性が安定に得られるので、その実用的価値は極めて
高い。It can be conveniently applied to any base material such as a wooden board or a concrete board. The conductive coating film formed by the composition of the present invention has abrasion resistance, impact resistance, water resistance,
It has excellent oil resistance, weather resistance, and antirust ability, and provides stable antistatic properties over a long period of time, so its practical value is extremely high.

［実施例］ 次に、具体例により本発明を更に詳細に説明する。なお
、以下の例における各種試験は次の方法及び基準による
ものである。[Example] Next, the present invention will be explained in more detail using specific examples. The various tests in the following examples are based on the following methods and standards.

艶！艮駁象 テーパー摩耗試験機を用い、Ｃ８−１７の摩耗軸（荷重
５００　ｇ　）により摩耗させ、その減量（■）を測定
。この試験においては、実用上８０■以下の摩耗量であ
ることが好まし□い。gloss! A C8-17 abrasion shaft (load of 500 g) was used to abrade the material using a taper abrasion tester, and the weight loss (■) was measured. In this test, it is practically preferable that the wear amount is 80 □ or less.

藍ｕｔｉ簾（ＪＩＳ　　Ｋ　５４００６．１３．３Ｂ法
による）衝撃変形試験機を用いて、重量が１ｋｇで、先
端が［７２インチの丸みをもつ撃ち型を落下させ、試験
片の上向き塗面に損傷が認められたときの落下高さく（
！１１）を−・ｌで表示１本試験による衝撃値は、３０
ｋｇ−（至）以上であることが好ましい。Using an impact deformation tester (according to JIS K 54006.13.3B method), a shot mold weighing 1 kg and having a rounded tip of 72 inches was dropped, and damage was detected on the upward painted surface of the test piece. The height of the fall when it is recognized (
! 11) is expressed as -・l The impact value in one test is 30
It is preferable that it is more than kg.

笠１吸工 試験片（約７０　Ｘ　７０　Ｘ　６ｍｍ）に組成物を塗
布し、７日後、その中央部分（約４０Ｘ４０ｍｍ）にエ
ポキシ系接着剤を塗り、鋼製アタッチメントを静かに載
せ、更にその上に重量１ｋｇのおもりを載せて、まわり
にはみだした接着剤をふきとる。３日後、おもりを取り
去り、鋼製アタッチメントの周辺に沿って切り込みを入
れ、鋼製ジグと鋼製当て板を用いて、引張試験機により
破断するまでの最大荷重を測定し１次式により算出。The composition was applied to a Kasa 1 suction test piece (approximately 70 x 70 x 6 mm), and after 7 days, an epoxy adhesive was applied to the central part (approximately 40 x 40 mm), a steel attachment was gently placed on it, and then a steel attachment was placed on top of it. Place a 1 kg weight on the surface and wipe off any adhesive that has squeezed out around it. After 3 days, the weight was removed, a cut was made along the periphery of the steel attachment, and the maximum load until breakage was measured using a tensile tester using a steel jig and a steel backing plate, and calculated using a linear equation.

Ｆ　＝　Ｐ　／１に こに、Ｆは付着強さくｋｇｆ／口２） Ｐは最大荷重（ｋｇｆ） この試験における付着強さは、７　ｋｇ　／　ａｍ　２
以上あることか実用上好ましい。F = P / 1 smile, F is adhesive strength kgf/mouth 2) P is maximum load (kgf) The adhesive strength in this test is 7 kg / am 2
The above is preferable from a practical point of view.

鮭木１絞菓 水道水に浸漬し、２，０００時間後の塗膜のふくれやは
がれなどの状態を観察。Salmonki 1 Soaked in tap water and observed conditions such as blistering and peeling of the paint film after 2,000 hours.

ｌｌ監五ｉ ［静電気安全指針（１９７８）　Ｊ技術資料２．４の固
有抵抗の電圧電流計法により、印加電圧１００ｖと５０
０ｖでそれぞれ測定。ll Kangoi [Static Electricity Safety Guidelines (1978) J Technical Data 2.4 Voltage and ammeter method of specific resistance
Measured at 0v.

なお、下記具体例においては、次の合成樹脂エマルジョ
ン（樹脂濃度はいずれもほぼ５０重量％）を用いた。In the following specific examples, the following synthetic resin emulsions (all resin concentrations were approximately 50% by weight) were used.

（イ）　ＭＭＡ　：　ＭＡＡ　：　ＥＡ＝３３　：　２
　：　６５（ロ）　ＭＭＡ　：　ＢＡ　：　２　ＥＨＡ
＝６０　：　１０　：　３０（ハ）上記（ロ）のアクリ
ル樹脂にエポキシ樹脂（ビスフェノールＡ型）及びポリ
アミド樹脂を加えたもので、各樹脂成分の混合割合は、
重量で７５：１５　：　１０である。また、各種単量体
の略号の内容は次の通りである。(b) MMA: MAA: EA=33:2
: 65 (b) MMA : BA : 2 EHA
= 60: 10: 30 (c) Epoxy resin (bisphenol A type) and polyamide resin are added to the acrylic resin of (b) above, and the mixing ratio of each resin component is:
The weight ratio is 75:15:10. Moreover, the contents of the abbreviations of various monomers are as follows.

ＭＭＡ　　　：メチルメタクリレート ＭＡＡ　　　：メタクリル酸 ＥＡ　　　：エチルアクリレート ＢＡ　　　ニブチルアクリレート ２ＥＨＡ：２−エチルへキシルアクリレート実施例　１ 合成樹脂エマルジョンとして、上記のアクリル系エマル
ジョン（イ）を用い、セメント成分としてアルミナセメ
ント及び骨材としてけい石粉を用いて、それぞれの重量
（固形分）割合が２６　：　４８　：２６のポリマーセ
メントを調製した。調製に際しては、水を加えて適度の
流動性を確保し、このポリマーセメントに、その固形分
１００重量部当たり、１５重量部のカーボン微細粒子（
実質的に全部が３２５メツシュをパス）を添加し、均質
混合して導電性塗材組成物を調製した。MMA: Methyl methacrylate MAA: Methacrylic acid EA: Ethyl acrylate BA Nibutyl acrylate 2EHA: 2-ethylhexyl acrylate Example 1 The above acrylic emulsion (A) was used as the synthetic resin emulsion, and alumina cement and bone were used as the cement components. Using silica powder as a material, polymer cements having a weight (solid content) ratio of 26:48:26 were prepared. During preparation, water is added to ensure appropriate fluidity, and 15 parts by weight of carbon fine particles (
(substantially all of which passed 325 mesh) was added and homogeneously mixed to prepare a conductive coating material composition.

調製された組成物を鉄板面にそれぞれ塗布し。The prepared compositions were applied to each iron plate surface.

得られた乾燥塗膜（膜厚；約５００μ）について各種試
験を行った。それぞれの測定結果は次の通りである。Various tests were conducted on the obtained dry coating film (film thickness: approximately 500 μm). The results of each measurement are as follows.

電気抵抗（印加直流電圧１００Ｖ）　：　、　６．８　
Ｘ　１０’　Ｑ電気抵抗（印加直流電圧５００Ｖ）：　
７．２ｘｌＯ’Ｑ耐摩耗性＝　　５３■ 耐衝撃強度：　　４０ｋｇ−１ 付着強さ：　　　　１２４ｋｇ／ａｍ”耐水性：　　　
異状なし 実施例　２ 実施例　１のポリマーセメントにおいて、セメント成分
として高炉セメント、合成樹脂エマルジョンとして上記
（ロ）のエマルジョン及び骨材としてけい砂を用い、同
様に操作してポリマーセメントを調製した。Electrical resistance (applied DC voltage 100V): , 6.8
X 10' Q electrical resistance (applied DC voltage 500V):
7.2xlO'Q Abrasion resistance = 53■ Impact resistance: 40kg-1 Adhesion strength: 124kg/am"Water resistance:
No abnormalities Example 2 A polymer cement was prepared in the same manner as in the polymer cement of Example 1 using blast furnace cement as the cement component, the emulsion (b) above as the synthetic resin emulsion, and silica sand as the aggregate.

このポリマーセメントを用いて、その１００重量部（固
形分）に対するカーボン粒子の配合量を変えた各種塗材
組成物を調製し、これをそれぞれ鉄面に塗布して、厚さ
がほぼ５００μの各種の導電性乾燥塗膜を得た。形成さ
れたそれぞれの塗膜について、上記電圧電流計法により
電気抵抗値を測定した。各塗膜におけるカーボン粒子の
添加配合量と測定結果を第１表にま、とめて示す。Using this polymer cement, various coating material compositions were prepared with varying amounts of carbon particles per 100 parts by weight (solid content), and these were applied to iron surfaces of various types with a thickness of approximately 500μ. A conductive dry coating film was obtained. The electrical resistance value of each of the formed coating films was measured by the above-mentioned voltammeter method. Table 1 shows the amount of carbon particles added and the measurement results for each coating film.

第　　　１　　　表 Ｎｏ、７の塗膜は、電気抵抗は充分小さいが、耐水性が
極めて悪く、耐摩耗性、耐衝撃性及び付着強さも大きく
低下するので、実用し難く、また、Ｎｏ。The coating films of No. 7 in Table 1 have sufficiently low electrical resistance, but have extremely poor water resistance, and their abrasion resistance, impact resistance, and adhesion strength are also greatly reduced, making them difficult to put into practical use.

□ ｌの組成物塗膜は、静電気のスパークを防止するには抵
抗値が高く、導電性塗材としての機能は期待できない。□ The coating film of the composition 1 has a high resistance value to prevent static electricity sparks, and cannot be expected to function as a conductive coating material.

実施例　３ 合成樹脂エマルジョンとして上記エマルジョン（ハ）を
用いて各種組成のポリマーセメントを調製し、これらに
、その固形分１００重量部当たり１３重量部のカーボン
粒子をそれぞれ配合調製した各種の導電性塗材組成物を
、乾燥塗膜が約５００μになるように鉄板面に塗布し、
それぞれの導電性塗膜の諸物性をしらべた。各組成物に
おけるポリマーセメントの３成分の割合及び各塗膜の物
性の測定結果を下掲第２表にまとめて示す。なお、電気
抵抗の測定における印加直流電圧は５００ｖである。Example 3 Polymer cements of various compositions were prepared using the above emulsion (c) as a synthetic resin emulsion, and various conductive coatings were prepared by mixing 13 parts by weight of carbon particles per 100 parts by weight of the solid content. Apply the material composition to the iron plate surface so that the dry coating film is about 500μ,
The physical properties of each conductive coating were investigated. The proportions of the three components of the polymer cement in each composition and the measurement results of the physical properties of each coating film are summarized in Table 2 below. Note that the applied DC voltage in the measurement of electrical resistance was 500V.

実験Ｎ００８〜１２は、エマルジョン量を変動させ、こ
れに対応してセメントと骨材の相対的適量を配合した場
合、また同Ｎｏ、１３〜１７は、エマルジョン量を固定
してセメント量と骨材量との割合を変えた塗材組成物に
ついてのものである。下表より明らかなように、　Ｎｏ
、８の塗膜は、耐衝撃性能が低く、Ｎｏ、１２の塗膜は
耐摩耗性能に麺があり、耐水性能も悪い。また、Ｎｏ、
１．３の塗膜は耐摩耗性が悪く、付着性能に難があり、
Ｎｏ、１．７の塗膜は耐水性能が極めて低い。Experiments Nos. 008 to 12 were conducted by varying the amount of emulsion and correspondingly mixing relative appropriate amounts of cement and aggregate. This is about coating material compositions with different amounts and ratios. As is clear from the table below, No.
The coating films of No. 8 have low impact resistance, and the coating films of No. 12 have poor abrasion resistance and poor water resistance. Also, No,
The coating film of 1.3 has poor abrasion resistance and poor adhesion performance.
The coating film No. 1.7 has extremely low water resistance.

〔発明の効果〕〔Effect of the invention〕

本発明の塗材組成物は、その塗膜が人体に帯電する静電
気を除去して静電スパークの発生を効果的に防止するこ
とができ、しかも優れた耐摩耗性、耐衝撃性、耐候性及
び耐水性を兼備し、更に付着強さと金属に対する防錆能
にも優れているので、石油関連施設や石油タンカー等の
スパークによる爆発危険個所等に塗布適用して極めて有
効な帯電防止性塗膜を提供しつる実用性の高いものであ
る。The coating material composition of the present invention has a coating film that can remove static electricity from the human body and effectively prevent the generation of electrostatic sparks, and has excellent abrasion resistance, impact resistance, and weather resistance. It is an antistatic coating that is extremely effective when applied to areas at risk of explosion due to sparks, such as oil-related facilities and oil tankers, as it has both water resistance and adhesion strength and anti-corrosion ability for metals. It offers a high level of practicality.

特許出願人　恒和化学工業株式会社 〃　吉川六朗Patent applicant Kowa Chemical Industry Co., Ltd. Rokuro Yoshikawa

Claims (1)

【特許請求の範囲】 １、（ａ）ポルトランドセメント、高炉セメント並びに
アルミナセメントよりなる群から選択されるセメント４
５〜６０重量％、 （ｂ）骨材５〜３０重量％、及び （ｃ）合成樹脂エマルジョン（固形分）２０〜３５重量
％ よりなるポリマーセメントに、３２５メッシュ下を少な
くとも９０重量％含有する微粉状炭素粒子を、上記ポリ
マーセメント１００重量部に対し５〜２５重量部添加し
てなる導電性塗材組成物。 ２、骨材がけい砂及びけい石粉よりなる群から選択され
る特許請求の範囲第１項記載の組成物。 ３、合成樹脂エマルジョンがアクリル系樹脂エマルジョ
ンである特許請求の範囲第１項又は第２項記載の組成物
。[Claims] 1. (a) Cement selected from the group consisting of Portland cement, blast furnace cement, and alumina cement 4
(b) 5-30% by weight of aggregate, and (c) 20-35% by weight of a synthetic resin emulsion (solid content), and a fine powder containing at least 90% by weight of 325 mesh or less. A conductive coating material composition comprising 5 to 25 parts by weight of carbon particles added to 100 parts by weight of the above polymer cement. 2. The composition according to claim 1, wherein the aggregate is selected from the group consisting of silica sand and silica powder. 3. The composition according to claim 1 or 2, wherein the synthetic resin emulsion is an acrylic resin emulsion.