JPH0159229B2 - - Google Patents
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- Publication number
- JPH0159229B2 JPH0159229B2 JP55167878A JP16787880A JPH0159229B2 JP H0159229 B2 JPH0159229 B2 JP H0159229B2 JP 55167878 A JP55167878 A JP 55167878A JP 16787880 A JP16787880 A JP 16787880A JP H0159229 B2 JPH0159229 B2 JP H0159229B2
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- JP
- Japan
- Prior art keywords
- emulsion
- solution
- sol
- present
- cement
- 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
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、建造物の天井、壁、床等を構成する
無機質材料を化粧材で被覆するに際し、該無機質
材料で構成される下地を処理するための作業性の
優れた新規な組成物に係り、詳しくは前記下地の
補修、補強を容易に行なうと共に、引続き施工さ
れる塗材や内装材との密着性等の諸性能を向上
し、拠つて該塗材や内装材の耐久性を著しく高め
ようとするものである。
従来より、建造物の塗装工事、吹付工事、内装
工事等の工事においては、床、壁、天井を構成す
る主なる材料であるコンクリート、モルタル、
ALC、PC、石綿スレート、硅酸カルシウム板等
の無機質材料を下地とし、これに塗料や吹付材等
の塗材や壁紙のごとき内装材を施工し、以つて
床、壁、天井の美装をはかつているが、係る無機
質材料の下地（以下本発明下地という）は一般に
凹凸、目違い、ピンホール、レイタンスなどの欠
陥を有する、並びにぜい化していることが多々あ
り、このためセメントペーストやセメントモルタ
ル、あるいはこれらに乳化重合型合成樹脂エマル
ジヨンを混入したもの、もしくは各種のパテなど
を用いて平滑化や穴うめ等の補修、あるいは補強
をはかつており、一方本発明下地に塗材や内装材
を被覆するに際しては一般にシーラー、プライマ
ーなどと称せられる合成樹脂溶液や合成樹脂エマ
ルジヨンなどの下塗材を予め塗付して本発明下地
の吸込み均一化や塗材との密着性向上などを行な
い、引続いて塗材や内装材を施工しているのが現
状で、従つていわゆる補修又は補強というプロセ
スと下塗材塗付というプロセスをとるのが当然と
され、且つこれらのプロセスの一方を省略するこ
とはできなかつた。
本発明は、係る上述の２つのプロセスを一体に
行ない得るもので且つ新しい組成物に係る。即ち
本発明は、実質的に水硬性セメント、無機酸化物
のゾル及び溶液乳化型エマルジヨンまたは溶液乳
化型エマルジヨンと乳化重合型エマルジヨンの混
合物から成るもので、該組成物は本発明下地の補
修、補強が可能なばかりでなく、引続く塗材や内
装材を施工するに際して何ら下塗材塗付を必要と
することなく直接施工でき、以つて該塗材や内装
材の本来の性能を恒久的に保持し得るものであ
る。以下本発明の構成について詳述する。
本発明に用いる水硬性セメントとは、天然セメ
ント、ポルトランドセメント、アルミナセメン
ト、スラグセメント、高炉セメント、シリカセメ
ント、フライアツシユセメント、高硫酸塩セメン
トなどが例示でき、これらは特に限定されること
なく使用でき随時選択されるものである。次に、
無機酸化物のゾルとは、Al2O3、Fe2O3、Cr2O3、
V2O5、SiO2などのゾルをいい、荷電した無機酸
化物の粒子が水中に分散しているもので各々使用
でき、就中Al2O3ゾル、SiO2ゾル及びSiO2／
Al2O3モル比が約５以上のアルミノシリケートゾ
ルが望ましいものである。また、SiO2ゾルの場
合は硅酸ソーダから得られるものが望ましく
SiO2／Na2Oモル比が約10以上のものとする。こ
れらのゾルは無機酸化物の超微粉が単に液中に懸
濁しているだけのものとは異なり、何れも長時間
安定に液中に存在するものである。更に、溶液乳
化型エマルジヨンまたは溶液乳化型エマルジヨン
と乳化重合型エマルジヨンの混合物を使用する。
即ち、溶液乳化型とは溶液重合や塊状重合で製造
され、フレークや粒状固体として供されるものあ
るいはプレポリマーなどの合成樹脂や合成ゴム
を、一旦有機溶剤に溶解または加熱溶融して流動
状態にしたものを、必要に応じて顔料等を混合し
た後乳化分散剤の存在下で撹拌しながら水と混合
してエマルジヨン化したものをいい、係る合成樹
脂及び／又は合成ゴムとしては、アクリル酸エス
テル、アクリル酸、メタクリル酸、アクリルアミ
ド、メタクリル酸エステル、酢酸ビニル、エチレ
ン、プロピオン酸ビニル、VeoVa、塩化ビニル、
塩化ビニリデン、アクロレイン、スチレン、ビニ
ルピロリドン、ビニルエーテル、ポリエステル、
エポキシ、ウレタン等の合成樹脂及び／又はクロ
ロプレン、イソプレン、ブチレン、ブタジエン、
アクリロニトリル、アクリルゴム等の合成ゴムか
ら選ばれる少くとも１種のポリマー又はプレポリ
マー、もしくは２種以上から成るコポリマーある
いはこれらの混合物が例示できる。また、乳化重
合型エマルジヨンとは通常の乳化重合法、即ち合
成樹脂や合成ゴムのモノマーを用い乳化と重合を
同時に行なつて得られるものであり、係る合成樹
脂及び／又は合成ゴムは溶液乳化型のものとほと
んど同じものが例示できる。本発明は上述のエマ
ルジヨンの内溶液乳化型のものが本発明に効果が
あり、乳化重合型エマルジヨン単独では引き続く
上塗塗材などとの密着性向上に関して顕著な影響
がないけれど、溶液乳化型の水性分散液に固形分
で等量以下配合したときは係る効果が妨げられな
く、耐水性に若干の向上がみられる。
本発明の下地処理用組成物は水硬性セメント１
重量部に対して、無機酸化物のゾルを固形分に換
算した量で約0.5〜100重量部、望ましくは約0.7
〜70重量部とし、溶液乳化型エマルジヨンまたは
溶液乳化型エマルジヨンと乳化重合型エマルジヨ
ンの混合物はこれを固形分に換算した量で約0.1
〜30重量部、望ましくは約0.2〜25重量部配合し
て成るものである。又、本発明下地処理用組成物
は、上記必須成分の他に無機質粉体、例えば硅石
粉、粘土、炭酸カルシウム、砂などを配合するこ
とができ、当該組成物の強度向上、増量等の役割
を果すが、その配合比率は特に限定されるもので
はないけれど、本発明の効果を阻害する程多量に
配合されてはならないものとし、上記三成分の固
形分に対して３重量倍以下とする。更に又、実際
の使用に当つて該ゾル及び該水性分散液の濃度は
特定されないけれど、あまり希釈し過ぎると当該
組成物の強度低下などをもたらすので注意する必
要がある。
上述の本発明に係る下地処理用組成物を本発明
下地に施工し、引続き塗材や内装材を施工するの
であるが、係る塗材としては、合成樹脂エマルジ
ヨンペイント、合成樹脂エナメル、合成樹脂ワニ
ス、セメント砂壁状吹付管、合成樹脂エマルジヨ
ン砂壁状吹付材、複層模様吹付材、セメント厚付
吹付材、合成樹脂エマルジヨン厚付吹付材、高弾
性化粧仕上材、天井吹付材、壁面防水材、塗床材
などが、また内装材としては多種壁紙（接着剤を
介して）が例示でき、係る塗材の施工形態はスプ
レー、ローラー、刷毛、コテあるいはこれらの混
合施工など任意の方法でよい。本発明においては
前述の各種塗材や内装材を本発明下地に施工する
に際し、いわゆるプロセスを１回行うのみで下地
処理用組成物の平滑化、粘性調整容易さ、コテや
ローラーや左官刷毛のすべりのよさ、厚膜時のひ
び割れ抵抗等の作業性が優れる他下地をよく補強
し、且つ下塗りのプロセスが省略できて尚下塗り
の目的性能を具備しているため、殊に係る両プロ
セスの一つのプロセスの省略が難しいといわれて
いた合成樹脂エナメル、複層模様吹付材、厚付吹
付材、高弾性化粧吹付材、壁面防水材および塗床
材などの施工においては著しい効果を有している
のである。
以下、本発明実施例及び比較例を掲げる。
実施例 １
メタクリル酸−アクリル酸ブチル共重合樹脂45
ｇをトルエン55ｇに溶解した溶液に、ポリエチレ
ンオキシドノニルフエニルエーテルを３ｇ配合し
て均一な溶液とし、次に水を少量ずつ滴下しなが
ら高速攪拌すると全体が白濁し始め、水を約100
ｇ滴下し終えたところで溶液乳化が完了した。こ
の溶液乳化型合成樹脂エマルジヨンに、SiO2／
Na2Oモル比が約50のシリカゾル（固形分30％）
を300ｇ、乳化重合法で得た酢酸ビニルホモポリ
マーのエマルジヨン（固形分50％）30ｇ、アルミ
ナセメント50ｇ、硅石粉300ｇ、並びにカオリン
クレー100ｇを配合し混合して本発明下地処理用
組成物を得た。別途、JIS Ａ 1401の方法に従つ
てセメントモルタル板を作製し、このモルタル板
に上記下地処理用組成物を左官ゴテを用いて５mm
厚に塗付した所、コテのすべりが非常によく、モ
ルタル板表面に観察されていたピンホールは全て
消えて面は極めて平滑性が高くなつた。乾燥後、
四国化研工業社製高弾性複層模様吹付材「レナク
レーター」主材を、下塗材を省いて直接塗付、更
に仕上材を塗付して供試体を得た。この供試体を
１週間乾燥した後次の試験を行い、第１表に示す
結果を得た。
Ａ 標準付着強さ……JIS Ａ 6910 6.3.2の(1)に
規定される試験。
Ｂ 浸水後付着強さ……JIS Ａ 6910 6.3.2の(2)
の規定に準じ、水中浸せき時間を１ケ月間とす
る。
Ｃ 温冷繰返後付着強さ……JIS Ａ 6910 6.3.2
の(3)の規定に準じ、繰返し回数を50回とする。
Ｄ 促進耐候性試験後付着強さ……JIS Ａ 6910
6.5に規定の耐候性試験を1000時間行つた後上
記Ａの試験を行う。
比較例 １
実施例１において、溶液乳化型合成樹脂エマル
ジヨンを配合しない下地処理材を用い、他は実施
例１と全く同じ試験を行つたところ、第１表に示
す結果を得た。
実施例 ２
実施例１において、メタクリル酸−アクリル酸
ブチル共重合樹脂を、スチレン−ブタジエン共重
合物に変えた以外は実施例１と全く同様の方法で
本発明下地処理用組成物を得た。この組成物をシ
ポレツクス社製ALCに６mm厚に左官刷毛で塗布
した所、通常のセメントモルタルに比し、作業時
間が約半分に短縮でき且つひび割れが全く入らず
ALCの気泡や欠けが完全に消えて面は極めて平
滑性が高くなつた。乾燥後四国化研工業社製有機
質砂壁状吹付材「シポカケン」を、下塗材を省い
て直接塗付して供試体を得た。１週間乾燥後、こ
の供試体を用いて実施例１の試験Ａ〜Ｄ及びJIS
Ａ 6910 6.4に規定される透水性試験を行つたと
ころ第２表に示す結果を得た。
比較例 ２
実施例２において、溶液乳化型SBRエマルジ
ヨンをメチロール化メラミン樹脂の25％水溶液に
変えた以外は実施例１と全く同じ方法で下地処理
材を得、実施例２の試験を行つて第２表に示す結
果を得た。
The present invention relates to a novel composition with excellent workability for treating a base made of an inorganic material when covering the inorganic material constituting the ceiling, walls, floor, etc. of a building with a decorative material. Specifically, it not only facilitates repair and reinforcement of the base material, but also improves various performances such as adhesion with subsequently applied coating materials and interior materials, thereby significantly increasing the durability of the coating materials and interior materials. This is what we are trying to do. Conventionally, in construction work such as painting work, spraying work, interior work, etc. of buildings, concrete, mortar,
Inorganic materials such as ALC, PC, asbestos slate, and calcium silicate plates are used as the base material, and coating materials such as paints and spray materials, as well as interior materials such as wallpaper, are applied to the base to create beautiful floors, walls, and ceilings. However, the inorganic material base (hereinafter referred to as the base of the present invention) generally has defects such as unevenness, misalignment, pinholes, and laitance, and is often brittle. Cement mortar, mixtures of emulsion-polymerized synthetic resin emulsions, or various putties have been used for smoothing, hole-filling, and other repairs, or for reinforcement. When coating the material, an undercoat material such as a synthetic resin solution or synthetic resin emulsion, which is generally called a sealer or primer, is applied in advance to uniformly absorb the base material of the present invention and improve adhesion with the coating material. The current situation is that coating materials and interior materials are subsequently applied, so it is natural to use a process of so-called repair or reinforcement and a process of applying a primer, and one of these processes is omitted. I couldn't do that. The present invention relates to a new composition capable of performing the above-mentioned two processes in an integrated manner. That is, the present invention essentially consists of a hydraulic cement, a sol of an inorganic oxide, and a solution emulsion type emulsion, or a mixture of a solution emulsion type emulsion and an emulsion polymerization type emulsion, and the composition is useful for repairing and reinforcing the substrate of the present invention. Not only is this possible, but it can also be applied directly to subsequent coatings and interior materials without the need for any undercoat, thereby permanently maintaining the original performance of the coatings and interior materials. It is possible. The configuration of the present invention will be explained in detail below. Examples of the hydraulic cement used in the present invention include natural cement, Portland cement, alumina cement, slag cement, blast furnace cement, silica cement, flyash cement, and high sulfate cement, and these can be used without particular limitation. It can be selected at any time. next,
Inorganic oxide sols include Al 2 O 3 , Fe 2 O 3 , Cr 2 O 3 ,
V 2 O 5 , SiO 2 , etc. sols, in which charged inorganic oxide particles are dispersed in water, can be used, among others, Al 2 O 3 sol, SiO 2 sol, and SiO 2 /
Aluminosilicate sols having an Al 2 O 3 molar ratio of about 5 or greater are desirable. In addition, in the case of SiO 2 sol, one obtained from sodium silicate is preferable.
The SiO 2 /Na 2 O molar ratio is approximately 10 or more. These sols are different from those in which ultrafine powder of inorganic oxide is simply suspended in a liquid, and all of these sols exist stably in the liquid for a long period of time. Furthermore, a solution emulsion type emulsion or a mixture of a solution emulsion type emulsion and an emulsion polymerization type emulsion is used.
In other words, the solution emulsion type is produced by solution polymerization or bulk polymerization and is provided as flakes or granular solids, or synthetic resins such as prepolymers or synthetic rubbers are once dissolved in an organic solvent or heated and melted to a fluid state. The synthetic resin and/or synthetic rubber include acrylic esters, etc., which are mixed with pigments, etc. as necessary, and then mixed with water while stirring in the presence of an emulsifier and dispersant to form an emulsion. , acrylic acid, methacrylic acid, acrylamide, methacrylic ester, vinyl acetate, ethylene, vinyl propionate, VeoVa, vinyl chloride,
vinylidene chloride, acrolein, styrene, vinylpyrrolidone, vinyl ether, polyester,
Synthetic resins such as epoxy and urethane and/or chloroprene, isoprene, butylene, butadiene,
Examples include at least one type of polymer or prepolymer selected from synthetic rubbers such as acrylonitrile and acrylic rubber, a copolymer consisting of two or more types, or a mixture thereof. In addition, emulsion polymerization type emulsion is obtained by the usual emulsion polymerization method, that is, by simultaneously performing emulsification and polymerization using monomers of synthetic resins and synthetic rubbers, and such synthetic resins and/or synthetic rubbers are of solution emulsion type. Examples are almost the same as those of . In the present invention, the internal solution emulsion type of the above-mentioned emulsion is effective in the present invention, and although the emulsion polymerization type emulsion alone does not have a significant effect on improving the adhesion with the subsequent top coating material, etc., the solution emulsion type aqueous emulsion is effective in the present invention. When the solid content is added to the dispersion in an equal or less amount, the effect is not hindered and water resistance is slightly improved. The base treatment composition of the present invention is hydraulic cement 1.
About 0.5 to 100 parts by weight, preferably about 0.7 parts by weight of the inorganic oxide sol in terms of solid content.
~70 parts by weight, and the amount of solution emulsion or a mixture of solution emulsion and emulsion polymerization emulsion is approximately 0.1 in terms of solid content.
~30 parts by weight, preferably about 0.2 to 25 parts by weight. In addition to the above-mentioned essential components, the composition for surface treatment of the present invention may contain inorganic powders such as silica powder, clay, calcium carbonate, sand, etc., which play a role in improving the strength and increasing the weight of the composition. Although the blending ratio is not particularly limited, it must not be blended in such a large amount as to impede the effects of the present invention, and should not exceed 3 times the solid content of the above three components. . Furthermore, although the concentrations of the sol and aqueous dispersion are not specified in actual use, care must be taken because excessive dilution may result in a decrease in the strength of the composition. The above-mentioned base treatment composition according to the present invention is applied to the base according to the present invention, and coating materials and interior materials are subsequently applied, and examples of such coating materials include synthetic resin emulsion paint, synthetic resin enamel, and synthetic resin. Varnish, cement sand wall spray pipe, synthetic resin emulsion sand wall spray material, multi-layer pattern spray material, cement thick spray material, synthetic resin emulsion thick spray material, high elastic decorative finishing material, ceiling spray material, wall waterproofing material, Examples include floor covering materials, and interior materials include various types of wallpaper (through adhesives), and the coating material may be applied by any method such as spray, roller, brush, trowel, or a combination of these methods. In the present invention, when applying the various coating materials and interior materials described above to the base of the present invention, the so-called process can be performed only once, smoothing the base treatment composition, easily adjusting the viscosity, and making it easier to use with a trowel, roller, or plastering brush. In addition to its excellent workability such as smoothness and crack resistance when thick films are used, it also reinforces the base well, eliminates the process of undercoating, and still has the intended performance of undercoat, so it is especially suitable for combining both processes. It is extremely effective in the construction of synthetic resin enamel, multi-layer pattern sprayed materials, thick sprayed materials, highly elastic decorative sprayed materials, wall waterproofing materials, and floor coating materials, which were said to be difficult to omit. It is. Examples of the present invention and comparative examples are listed below. Example 1 Methacrylic acid-butyl acrylate copolymer resin 45
Add 3g of polyethylene oxide nonyl phenyl ether to a solution of 55g of toluene and mix to make a homogeneous solution. Next, add water little by little and stir at high speed.
The solution emulsification was completed when the dropwise addition was completed. This solution emulsion type synthetic resin emulsion contains SiO 2 /
Silica sol (solid content 30%) with a Na2O molar ratio of approximately 50
300 g of vinyl acetate homopolymer emulsion (solid content 50%) obtained by emulsion polymerization method, 50 g of alumina cement, 300 g of silica powder, and 100 g of kaolin clay were blended and mixed to obtain the base treatment composition of the present invention. Ta. Separately, a cement mortar board was prepared according to the method of JIS A 1401, and the above-mentioned surface treatment composition was applied to the mortar board by 5 mm using a plastering trowel.
When applied thickly, the trowel slipped very easily, all the pinholes that had been observed on the surface of the mortar board disappeared, and the surface became extremely smooth. After drying,
The main material of the highly elastic multi-layer pattern spray material "Renacrater" manufactured by Shikoku Kaken Kogyo Co., Ltd. was applied directly without the use of an undercoat material, and a finishing material was further applied to obtain a specimen. After drying this specimen for one week, the following test was conducted, and the results shown in Table 1 were obtained. A Standard adhesive strength...Test specified in JIS A 6910 6.3.2 (1). B Adhesive strength after immersion in water...JIS A 6910 6.3.2 (2)
In accordance with the regulations, the immersion time in water is one month. C Adhesive strength after repeated heating and cooling...JIS A 6910 6.3.2
The number of repetitions shall be 50 in accordance with the provisions of (3). D Adhesive strength after accelerated weathering test...JIS A 6910
After conducting the weather resistance test specified in 6.5 for 1000 hours, perform the test A above. Comparative Example 1 In Example 1, the same test as in Example 1 was conducted using a base treatment material not containing a solution-emulsified synthetic resin emulsion, and the results shown in Table 1 were obtained. Example 2 A base treatment composition of the present invention was obtained in exactly the same manner as in Example 1, except that the methacrylic acid-butyl acrylate copolymer resin was changed to a styrene-butadiene copolymer. When this composition was applied to Siporex ALC with a plastering brush to a thickness of 6 mm, the working time was reduced to about half compared to ordinary cement mortar, and there were no cracks at all.
Bubbles and chips in ALC completely disappeared, and the surface became extremely smooth. After drying, an organic sand wall-like spray material "Sipokaken" manufactured by Shikoku Kaken Kogyo Co., Ltd. was directly applied without using a primer to obtain a specimen. After drying for one week, this specimen was used for tests A to D of Example 1 and JIS
A water permeability test specified in 6910 6.4 was conducted and the results shown in Table 2 were obtained. Comparative Example 2 A base treatment material was obtained in exactly the same manner as in Example 1, except that the solution emulsion type SBR emulsion was changed to a 25% aqueous solution of methylolated melamine resin, and the test of Example 2 was conducted. The results shown in Table 2 were obtained.
【表】【table】
Claims (1)
乳化型エマルジヨンまたは溶液乳化型エマルジヨ
ンと乳化重合型エマルジヨンの混合物から成る下
地処理用組成物。 ２ 無機酸化物のゾルがアルミナゾル、アルミノ
シリケートゾル及びシリカゾルから選ばれる少な
くとも１種である特許請求の範囲第１項に記載の
下地処理用組成物。 ３ 無機酸化物のゾルがSiO2／Na2Oモル比約10
以上のシリカゾルである特許請求の範囲第１項に
記載の下地処理用組成物。 ４ 溶液乳化型エマルジヨンの固形分と乳化重合
型エマルジヨンの固形分の比率が100〜50：０〜
50重量比である特許請求の範囲第１項に記載の下
地処理用組成物。[Claims] 1. A base treatment composition comprising a hydraulic cement, an inorganic oxide sol, and a solution emulsion or a mixture of a solution emulsion and an emulsion polymerization emulsion. 2. The base treatment composition according to claim 1, wherein the inorganic oxide sol is at least one selected from alumina sol, aluminosilicate sol, and silica sol. 3 The inorganic oxide sol has a SiO 2 /Na 2 O molar ratio of approximately 10.
The base treatment composition according to claim 1, which is the above silica sol. 4 The ratio of the solid content of the solution emulsion type emulsion to the solid content of the emulsion polymerization type emulsion is 100 to 50:0 to
The base treatment composition according to claim 1, which has a weight ratio of 50% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16787880A JPS5792557A (en) | 1980-11-27 | 1980-11-27 | Undercoating treating composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16787880A JPS5792557A (en) | 1980-11-27 | 1980-11-27 | Undercoating treating composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5792557A JPS5792557A (en) | 1982-06-09 |
| JPH0159229B2 true JPH0159229B2 (en) | 1989-12-15 |
Family
ID=15857748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16787880A Granted JPS5792557A (en) | 1980-11-27 | 1980-11-27 | Undercoating treating composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5792557A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2171411B (en) * | 1985-02-14 | 1989-06-14 | Gerald Hallworth | Formation of solid polymeric material |
| GB8726104D0 (en) * | 1987-11-06 | 1987-12-09 | Ind Latex Compounds Ltd | Coating method |
| US5022948A (en) * | 1988-06-16 | 1991-06-11 | The Dow Chemical Company | Method of bonding layers using discrete areas of adhesive |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5166315A (en) * | 1974-12-05 | 1976-06-08 | Asahi Chemical Ind | HORIMAASEMENTOMORUTARUSOSEIBUTSU |
| JPS5453140A (en) * | 1977-10-06 | 1979-04-26 | Showa Denko Kk | Improved water proof composition |
| JPS54143438A (en) * | 1978-04-28 | 1979-11-08 | Naoto Kokuta | Special hydrated material |
-
1980
- 1980-11-27 JP JP16787880A patent/JPS5792557A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5792557A (en) | 1982-06-09 |
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