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JP3599397B2 - Resin mortar composition - Google Patents

Resin mortar composition Download PDF

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Publication number
JP3599397B2
JP3599397B2 JP1288595A JP1288595A JP3599397B2 JP 3599397 B2 JP3599397 B2 JP 3599397B2 JP 1288595 A JP1288595 A JP 1288595A JP 1288595 A JP1288595 A JP 1288595A JP 3599397 B2 JP3599397 B2 JP 3599397B2
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Prior art keywords
weight
parts
resin mortar
latex
mortar composition
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JP1288595A
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JPH08208302A (en
Inventor
満 錦織
淳至 奥山
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Asahi Kasei Chemicals Corp
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Asahi Kasei Chemicals Corp
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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0091Organic co-binders for mineral binder compositions
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/60Flooring materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

【0001】
【産業上の利用分野】
本発明は、セメントモルタルにラテックスを添加した樹脂モルタル組成物に関する。更に詳しくは、建築物の主に床の仕上げ材として有用な材料として利用されるものであり、高い流動性を有し、且つ弾性に優れた樹脂モルタル組成物に関するものである。
【0002】
【従来の技術】
従来、弾性に優れた樹脂モルタル組成物を施工する際は金鏝を使用して塗り付ける方法が主流であった。この樹脂モルタル塗りは大変な労力と高度な熟練を必要とするものであり、流動性が高く、吹き付けやローラーで簡単に施工でき、しかも、1mm以上の厚塗りできる材料が望まれていた。
【0003】
この流動性の高い樹脂モルタルは、一般的に用いられるセメント用分散材や流動化剤の添加や、水分量比を高めることで得られる。
しかし、流動性の高い樹脂モルタルを厚塗りすると、乾燥に伴いクラックを発生するという重大な問題点があり、これを避けるためには流動性を犠牲するか、あるいは薄塗りにとどめるという以外に有用な解決手段はなかった。流動性を犠牲にすれば、従来どおり金鏝で塗り付けざるを得ず、薄塗りにとどめれば平滑で均一な仕上げが困難となる。
【0004】
【発明が解決しようとする課題】
本発明は、高い流動性を有し、建築物の床面に容易に施工することができ、且つ厚塗りしても割れにくい樹脂モルタル組成物を提供することにある。また弾性に優れ、下地の亀裂に対する抵抗が高く、仕上げ材としても有用な樹脂モルタル組成物を提供することにある。
【0005】
【課題を解決するための手段】
本発明は、(イ)ポルトランドセメント10〜40重量部、(ロ)無機質充填材10〜45重量部、(ハ)沸点150℃以上のジエチレングリコールジブチルエーテル、及びジエチレングリコールモノブチルエーテルアセテートから選ばれる1種以上を1〜30重量%(但し、ラテックス固形分に対して)含むラテックス10〜35重量部(固形分換算)及び(ニ)水20〜40重量部を含有する樹脂モルタル組成物に関するものである。
【0006】
(イ)ポルトランドセメントとしては、普通ポルトランドセメント、白色ポルトランドセメント、早強ポルトランドセメント、アルミナセメント等種々のセメントを使用できる。また、その使用量は10〜40重量部であり、この範囲より配合量が少ないと、強度が低下する。一方、この範囲より配合量が多いと強度は増加するものの、乾燥に伴うひび割れが発生し易くなる。通常は、20〜35重量部の範囲で使用することが望ましい。
【0007】
(ロ)無機質充填材としては、一般的にセメントモルタルに用いられる砂、珪砂、寒水砂、天然及び人工軽量骨材等が使用できる。またその使用量は10〜45重量部であり、この範囲より配合量が少ないと、強度は増加するものの、乾燥に伴うひび割れが発生し易くなる。一方、この範囲より配合量が多いと、逆に、乾燥に伴う亀裂は少なくなるものの、強度が低下する。通常は20〜35重量部の範囲で使用することが望ましい。
【0008】
(ハ)ラテックスとしては、各種水硬性組成物と混和して性能を満たすものであれば限定されないが、一般的には常温で造膜する必要があり、例えば、(メタ)アクリル酸エステル、スチレン、酢酸ビニル、ベオバ、エチレン、塩化ビニル、ジエン系各モノマーの単独又は共重合ラテックス等が使用できる。好ましいものとしては、アクリル系ラテックス及びエチレン−酢酸ビニル系ラテックスである。またその使用量は、10〜35重量部であり、この範囲より使用量が少ないと、防水性能が不十分になるとともに、下地の亀裂に対する抵抗性が低下する。一方、この範囲より使用量が多いと、上記性能は非常に良好であるものの、モルタルの強度発現が遅れ、施工時の作業性が悪くなる。また経済性の点で負担が大きいものとなる。通常は15〜30重量部の範囲で使用することが望ましい。
【0009】
ラテックスに添加する、沸点150℃以上の揮発性有機溶剤はエチレングリコール、ジエチレングリコール、プロピレングリコールのモノ−アルキルエーテルまたはジ−アルキルエーテルまたはアルキルエーテルアルキルカルボキシレートあるいは、パラフィン含有量20vol%以上の石油系炭化水素溶剤である。ラテックス固形分に対する添加量は1〜30重量%が好ましく、この範囲を探ることにより、乾燥時に伴う亀裂の防止、モルタルの強度の点で望ましい。通常は2〜20重量%の範囲で添加することが特に望ましい。
【0010】
(ニ)成分の水は、住宅・都市整備公団の仕様書「セリフレベリング床材の品質試験基準値」のフロー値(190mm以上)に適応する量、即ち、20〜40重量部が用いられる。
本発明の樹脂モルタル組成物に、必要に応じて上記の成分の他に、各種の混和剤を添加することができる。
【0011】
具体的には、減水剤として、リグニン系、オキシカルボン酸系、ナフタリン系等、流動化剤として、ラミン系、ナフタリン系等、収縮低減剤として、グリコールエーテル系、ポリエーテル系等、耐寒剤として、亜硝酸塩、塩化カルシウム等、防水剤として、ステアリン酸、珪酸塩等、防錆剤として、亜硝酸塩、リン酸塩等、粘度調整剤として、メチルセルロース、ヒドロキシエチルセルロース、ポリビニールアルコール等、凝結調整剤として、リン酸塩、珪酸塩等、膨張剤として、エトリンガイト系、石灰系等、着色剤として、酸化鉄、酸化クロム等、消泡剤として、シリコン系、鉱油系等、補強材として、鋼繊維、ガラス繊維、合成繊維等が挙げられる。
【0012】
【実施例】
実施例、比較例で用いた試験方法を以下に示す。
▲1▼フロー試験は、住宅・都市整備公団規格の仕様書「セルフレベリング床材の品質試験基準」に準拠して行った。尚、本試験は、温度20℃、湿度65%RH、の条件下で行い、厚さ5mmのガラス板上に内径50mm、高さ50mmの塩化ビニル製パイプを置き、試料を満たした後、直ちにパイプを引き上げ、広がりが静止した後、直角2方向の直径を測定し、その平均値をフロー値とした。
▲2▼耐割れ性試験は、30cm×30cmのガラス板上に、ポリエチレンのシートを貼り付け、各樹脂モルタル組成物を2mm厚で施工し、1日乾燥した後、塗膜表面のクラック発生状態を目視で観察した。
【0013】
5:効果大(クラックなし)、3:効果少(ヘアークラック発生)、1:効果なし(大きなクラック発生)
▲3▼引張試験は、30cm×30cmのガラス板上に、ポリエチレンのシートを貼り付け、各樹脂モルタル組成物を2mm厚で施工し、7日乾燥した後、JIS K 6301に準じて試験を行った。
【0014】
[実施例、比較例1〜3]
表1に示す揮発性有機溶剤を、ラテックス100重量部(固形分換算)に対し10重量部加え、良く撹拌した後3日間静置した。このラテックス100重量部に、セメント50重量部、珪砂7号25重量部、炭酸カルシウム25重量部を混合し、実施例及び比較例1〜3を調整した。尚、使用した原材料は以下の通りである。
【0015】
ラテックス:2−エチルヘキシルアクリレート−スチレン共重合系ラテックス(旭化成工業(株)製、固形分50%、計算Tg約−25℃)、セメント:普通ポルトランドセメント(小野田セメント(株)製)、珪砂7号:一般市販品、炭酸カルシウム:SS30(白石カルシウム(株)製)、水:水道水である。
【0016】
【比較例4〜7】
市販されている2種類の樹脂モルタル組成物(粉体とラテックスのセット品)の水量を変化させた。
以下の性能試験を行った結果が表1、表2である。
【0017】
[実施例、比較例8、9]
実施例の揮発性有機溶剤を用い、ラテックスの種類及び樹脂モルタル組成物の配合比を変えた。結果は表3に示す。表3より、実施例は、フロー値が高いにもかかわらず、大きな割れの発生は認められなかった。一方、比較例8は、フロー値を大きくすると割れが発生する。又、比較例9は、割れは認められないが、強度が低い。
【0018】
【表1】

Figure 0003599397
【0019】
【表2】
Figure 0003599397
【0020】
【表3】
Figure 0003599397
【0021】
【発明の効果】
以上説明したように、本発明の樹脂モルタル組成物は、高い流動性を有している為、建築物の主に床面に容易に施工することができ、且つ厚塗りしても割れにくい。又、弾性に優れており、下地の亀裂に対する抵抗性が高いため、仕上げ材として有用な用途がある。[0001]
[Industrial applications]
The present invention relates to a resin mortar composition obtained by adding a latex to cement mortar. More specifically, the present invention relates to a resin mortar composition which is used as a material useful mainly as a floor finishing material for buildings, has high fluidity, and is excellent in elasticity.
[0002]
[Prior art]
Conventionally, when applying a resin mortar composition having excellent elasticity, a method of applying the resin mortar composition using a gold trowel has been the mainstream. This resin mortar coating requires a great deal of labor and a high level of skill, and a material that has high fluidity, can be easily applied by spraying or a roller, and can be applied with a thickness of 1 mm or more has been desired.
[0003]
This resin mortar having high fluidity can be obtained by adding a generally used dispersant for cement or a fluidizing agent, or by increasing the water content ratio.
However, thick coating of resin mortar with high fluidity has a serious problem that cracks occur with drying.To avoid this, it is useful other than sacrificing fluidity or keeping it thin. There was no solution. If the fluidity is sacrificed, it must be applied with a gold trowel as in the past, and if the application is limited to a thin coat, it is difficult to achieve a smooth and uniform finish.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a resin mortar composition which has high fluidity, can be easily applied to a floor of a building, and is hard to be broken even when it is thickly applied. Another object of the present invention is to provide a resin mortar composition which is excellent in elasticity, has high resistance to cracks on a base, and is useful as a finishing material.
[0005]
[Means for Solving the Problems]
The present invention relates to (A) 10 to 40 parts by weight of Portland cement, (B) 10 to 45 parts by weight of an inorganic filler, (C) at least one selected from diethylene glycol dibutyl ether having a boiling point of 150 ° C. or more , and diethylene glycol monobutyl ether acetate. Is a resin mortar composition containing 10 to 35 parts by weight (in terms of solid content) of latex containing 1 to 30% by weight (based on the solid content of latex) and (d) 20 to 40 parts by weight of water.
[0006]
(A) As the Portland cement, various cements such as ordinary Portland cement, white Portland cement, early-strength Portland cement, and alumina cement can be used. The amount used is 10 to 40 parts by weight. If the amount is less than this range, the strength is reduced. On the other hand, if the amount is larger than this range, the strength is increased, but cracks due to drying are likely to occur. Usually, it is desirable to use in the range of 20 to 35 parts by weight.
[0007]
(B) As the inorganic filler, sand, silica sand, cold water sand, natural and artificial lightweight aggregate generally used for cement mortar can be used. The amount used is 10 to 45 parts by weight. If the amount is less than this range, the strength is increased, but cracks due to drying are likely to occur. On the other hand, if the amount is more than this range, the cracks due to drying are reduced, but the strength is reduced. Usually, it is desirable to use in the range of 20 to 35 parts by weight.
[0008]
(Iii) The latex is not particularly limited as long as it is mixed with various hydraulic compositions and satisfies the performance. In general, it is necessary to form a film at normal temperature. For example, (meth) acrylate, styrene , Vinyl acetate, veoba, ethylene, vinyl chloride, and diene monomers alone or copolymerized latex. Preferred are acrylic latex and ethylene-vinyl acetate latex. The amount used is 10 to 35 parts by weight. If the amount used is less than this range, the waterproof performance becomes insufficient and the resistance to cracks in the base decreases. On the other hand, when the amount used is larger than this range, the above-mentioned performance is very good, but the strength development of the mortar is delayed, and workability at the time of construction deteriorates. In addition, the burden is large in terms of economy. Usually, it is desirable to use it in the range of 15 to 30 parts by weight.
[0009]
The volatile organic solvent having a boiling point of 150 ° C. or more to be added to the latex is a mono-alkyl ether or di-alkyl ether or alkyl ether alkyl carboxylate of ethylene glycol, diethylene glycol or propylene glycol, or a petroleum-based carbon having a paraffin content of 20 vol% or more. Hydrogen solvent. The amount added to the solid content of the latex is preferably 1 to 30% by weight. By exploring this range, it is desirable from the viewpoint of preventing cracks during drying and the strength of the mortar. Usually, it is particularly desirable to add it in the range of 2 to 20% by weight.
[0010]
(D) As the component water, an amount suitable for the flow value (190 mm or more) of the specification of the Residential and Urban Development Corporation “Self-leveling floor material quality test standard value” (ie, 20 to 40 parts by weight) is used.
Various admixtures can be added to the resin mortar composition of the present invention, if necessary, in addition to the above components.
[0011]
Specifically, as a water reducing agent, lignin, oxycarboxylic acid type, naphthalene type and the like, as a fluidizing agent, melamine-based, naphthalene-based, etc., as shrinkage reducing agent, glycol ether, polyether, etc., cold agent Nitrite, calcium chloride, etc., as a waterproofing agent, stearic acid, silicate, etc., as a rust inhibitor, nitrite, phosphate, etc., as a viscosity modifier, methylcellulose, hydroxyethylcellulose, polyvinyl alcohol, etc., setting control As an agent, phosphate, silicate, etc., as an expanding agent, ettringite type, lime type, etc., as a coloring agent, iron oxide, chromium oxide, etc., as an antifoaming agent, silicon type, mineral oil type, etc., as a reinforcing material, steel, Fibers, glass fibers, synthetic fibers, and the like.
[0012]
【Example】
Test methods used in Examples and Comparative Examples are shown below.
{Circle around (1)} The flow test was conducted in accordance with the specification of the Japan Housing and Urban Development Corporation Standard "Quality Test Standard for Self-leveling Flooring". This test was conducted under the conditions of a temperature of 20 ° C. and a humidity of 65% RH. A pipe made of vinyl chloride having an inner diameter of 50 mm and a height of 50 mm was placed on a glass plate having a thickness of 5 mm. After the pipe was pulled up and the spread stopped, the diameter in two perpendicular directions was measured, and the average value was taken as the flow value.
(2) The cracking resistance test was performed by attaching a polyethylene sheet to a 30 cm x 30 cm glass plate, applying each resin mortar composition to a thickness of 2 mm, drying it for one day, and then generating cracks on the coating surface. Was visually observed.
[0013]
5: large effect (no crack), 3: small effect (hair crack generation), 1: no effect (large crack generation)
(3) The tensile test is performed by applying a polyethylene sheet to a 30 cm × 30 cm glass plate, applying each resin mortar composition to a thickness of 2 mm, drying it for 7 days, and conducting a test according to JIS K6301. Was.
[0014]
[Examples 1 and 2 , Comparative Examples 1 to 3]
The volatile organic solvent shown in Table 1 was added in an amount of 10 parts by weight based on 100 parts by weight (in terms of solid content) of the latex, and the mixture was stirred well and allowed to stand for 3 days. The latex 100 parts by weight, 50 parts by weight of cement, No. 7 25 parts by weight of silica sand was mixed with 25 parts by weight of calcium carbonate was adjusted Examples 1-2 and Comparative Examples 1-3. The raw materials used are as follows.
[0015]
Latex: 2-ethylhexyl acrylate-styrene copolymer latex (manufactured by Asahi Kasei Kogyo Co., Ltd., solid content 50%, calculated Tg about -25 ° C), cement: ordinary Portland cement (manufactured by Onoda Cement Co., Ltd.), silica sand 7 : General commercial product, calcium carbonate: SS30 (manufactured by Shiraishi Calcium Co., Ltd.), water: tap water.
[0016]
[Comparative Examples 4 to 7]
The water content of two commercially available resin mortar compositions (set product of powder and latex) was changed.
Tables 1 and 2 show the results of the following performance tests.
[0017]
[Examples 3 to 8 , Comparative Examples 8, 9]
Using the volatile organic solvent of Example 1 , the type of latex and the mixing ratio of the resin mortar composition were changed. The results are shown in Table 3. From Table 3, in Examples 3 to 8 , no large cracks were observed even though the flow value was high. On the other hand, in Comparative Example 8, cracks occur when the flow value is increased. In Comparative Example 9, no crack was observed, but the strength was low.
[0018]
[Table 1]
Figure 0003599397
[0019]
[Table 2]
Figure 0003599397
[0020]
[Table 3]
Figure 0003599397
[0021]
【The invention's effect】
As described above, since the resin mortar composition of the present invention has high fluidity, it can be easily applied mainly to a floor surface of a building, and hardly cracks even when thickly applied. In addition, since it has excellent elasticity and high resistance to cracks in the substrate, it has a useful use as a finishing material.

Claims (1)

(イ)ポルトランドセメント10〜40重量部、(ロ)無機質充填材10〜45重量部、(ハ)沸点150℃以上のジエチレングリコールジブチルエーテル、及びジエチレングリコールモノブチルエーテルアセテートから選ばれる1種以上を1〜30重量%(但し、ラテックス固形分に対して)含むラテックス10〜35重量部(固形分換算)及び(ニ)水20〜40重量部を含むことを特徴とする樹脂モルタル組成物。(A) 10 to 40 parts by weight of Portland cement, (b) 10 to 45 parts by weight of an inorganic filler, (c) 1 to 30 kinds of at least one selected from diethylene glycol dibutyl ether having a boiling point of 150 ° C. or more and diethylene glycol monobutyl ether acetate. A resin mortar composition comprising 10 to 35 parts by weight (in terms of solids ) of latex containing 10 % by weight (based on the solid content of latex) and (d) 20 to 40 parts by weight of water.
JP1288595A 1995-01-30 1995-01-30 Resin mortar composition Expired - Lifetime JP3599397B2 (en)

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JP3599397B2 true JP3599397B2 (en) 2004-12-08

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