JP2009274911A - Polyurethane-based cement composition and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polyurethane-based cement composition which is highly stable, can be blended with a nonaqueous colored toner, and does not cause separation of a pigment, and from which a uniformly colored appearance can be obtained. <P>SOLUTION: The polyurethane-based cement composition contains hydraulic cement, water, a polyol, and an isocyanate compound, and is characterized in that the dispersion type of the polyol in water is a water-in-oil droplet type. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a polyurethane cement composition having good coloring stability.

  Conventionally, concrete that has been cast in order to add functions such as waterproofness, heat resistance, chemical resistance, hot water resistance, and impact strength to floors in kitchen rooms, test rooms, chemical and chemical factories, electronic circuit factories, etc. Composite floors with reinforced resin on the surface and resin mortar floors with cement and thermosetting resins such as urethane resin and epoxy resin are being constructed. In particular, polyurethane-based cement-coated flooring materials composed of hydraulic cement, water, polyol, and isocyanate compounds are excellent in heat and mechanical impact strength, and are therefore applied to floors where heavy loads are applied.

  Cement composition consisting of hydraulic cement, water, cement water reducing agent, and components that can harden to become resin is easily dispersed evenly by mixing at the construction site, and unevenness in workability, performance, and finished appearance is unlikely to occur. It is disclosed. (Patent Document 1)

(A) hydraulic cement, (b) aggregate, (c) compound containing isocyanate group, (d) water, (e) tertiary amine compound catalyst, and (f) active hydrogen-containing compound (however, water and 3) It is disclosed that a polyurethane-based cement composition having an essential component (excluding a secondary amine compound catalyst) has an excellent finished appearance. (Patent Document 2)

Hydrophobic cement, water, aggregate, hydrophobic polyol such as castor oil-based polyol, and polymer comprising an isocyanate component containing an isocyanate group-terminated prepolymer obtained by reaction of a hydrophobic polyol such as castor oil-based polyol with a diisocyanate compound It discloses that the cement composition is a highly durable floor covering. (Patent Document 3)

A resin cement composition comprising a polyester polyol, an isocyanate compound and an aggregate containing hydraulic cement, and a layer consisting only of the resin component on the surface and a central layer containing aggregate even when the coating thickness is 5 mm or less It is disclosed that there is no difference in the shrinkage rate, and no warping phenomenon or surface cracking is induced. (Patent Document 4)

JP-A-8-169744 JP 11-79820 A JP 2000-72507 A JP-A-2005-47719

  The polyurethane-based cement flooring is colored and used, but the colorant is often mixed with a pigment as a hydraulic cement or aggregate as a powder, limited to powder pigment, and by considering dispersibility, Colorability may be sacrificed. In some cases, a colorant toner is blended with a polyol emulsion. However, the polyol emulsion is an oil-in-water emulsion and is limited to a water-dispersed toner. I sometimes woke up. This separated polyol emulsion causes blurring of components in the coating material system, which causes serious finishing defects such as blisters and uneven color.

  The problem to be solved is to provide a polyurethane-based cement composition that can contain a non-aqueous colored toner and has high composition stability.

The invention according to claim 1 is a polyurethane cement composition comprising a hydraulic cement, water, a polyol, and an isocyanate compound, wherein the water dispersion of the polyol is a water-in-oil type. Thus, a non-aqueous toner can be used, pigment separation does not occur, and a uniform colored appearance can be obtained.
The invention according to claim 2 is the polyurethane cement composition according to claim 1, wherein the coloring is a non-aqueous toner, and the pigment is not separated and a uniform colored appearance is obtained.
A third aspect of the invention is a method for producing a polyurethane-based cement, in which a non-aqueous toner is blended with a water-dispersed polyol which is a water-in-oil type of the polyurethane-based composition of the first aspect. A uniform colored appearance can be obtained.

  With the polyurethane-based cement composition and production method of the present invention, pigment separation does not occur and a uniform colored appearance can be obtained.

  The polyurethane-based cement composition is used for coating or the like by mixing a hydraulic cement composition, a polyol emulsion composition and an isocyanate composition at a construction site. Conventional polyol emulsions are oil-in-water (O / W type) emulsions in which polyol is dispersed in water, and generally have a resin phase dispersed in islands. However, in this type of emulsion, in order to ensure workability such as pot life at the time of coating, the amount of surfactant is usually suppressed to about 0.5 to 3% with respect to the whole emulsion. There is a drawback that the resin phases are likely to aggregate and cause phase separation. For example, if the emulsion is in such a phase-separated state during product production, a product with a different ratio of resin to water during subdivided filling can be produced. At this time, if a resin-rich material is used for construction, the reaction balance in the coating material system is lost, and bulge due to carbon dioxide gas easily occurs. Furthermore, when a colorant is blended in advance in the polyol emulsion composition, fatal finish defects such as color unevenness may be induced. The present invention is a polyurethane-based cement in which the polyol emulsion composition is made into a water-in-oil (W / O) emulsion, so that component separation in the composition is suppressed, there is little difference in components as a product, and unevenness during coating is less likely to occur. It is characterized by becoming a composition.

Polyol Composition As the polyol composition of the present invention, a polyol composition in which water is dispersed in a polyol having two or more hydroxyl groups such as polyester polyol, polyether polyol, acrylic polyol, and epoxy-modified polyol can be used. A preferred example is castor oil-modified polyol.
Specific products include Sumitomo Bayer Urethane Co., Ltd. Dismophen 1145, Dismophen 1150, and the like.
Some water-in-oil type polyols can be dispersed with water as they are, but if necessary, a nonionic surfactant having an HLB of 10 or less is blended as an emulsifier. The water content of the water-in-oil polyol emulsion is preferably in the range of 40 to 10% by weight in the emulsion. In this range, coloring can be performed, and a diluent can be blended for ensuring coating workability and for controlling swelling due to foaming.

This water-in-oil polyol emulsion has little component separation. The determination of the water-in-oil type is based on the low dispersibility in water, so that 1 ml of emulsion is added to 100 ml of water at 20 ° C. It is assumed that As this appearance, the boundary of the oil droplets can be visually confirmed, and the number of oil droplets is not required, and the water phase is slightly turbid.

Isocyanate compounds As isocyanate compounds, tolylene diisocyanate (TDI), diphenylmethylene diisocyanate (MDI), hexamethylene diisocyanate (HDI), hydrogenated diphenylmethane diisocyanate, hydrogenated tolylene diisocyanate, xylylene diisocyanate, isophorone. Diisocyanates and the like can be used, and preferred examples include those containing polynuclear polyphenylene polymethyl polyisocyanate (hereinafter abbreviated as polymeric MDI) represented by the general formula of Formula 1.
Specific products that contain polymeric MDI include Sumidur 44V10, Sumidur 44V20 (Sumitomo Bayer Urethane Co., Ltd., trade name), Coronate 3520, MR-100 (above Nippon Polyurethane Co., Ltd., trade name) ) Etc.

Hydraulic cement As the hydraulic cement, Portland cement, alumina cement, blast furnace cement, early strength Portland cement, white Portland cement and the like are used alone or in combination.
In addition, when it is desired to set the color tone of the construction floor to a specific color, if white Portland cement is used, it is possible to finish on a light floor.

Additives and other compositions contain additives such as diluents, antifoaming agents, fluidizing agents, surfactants, and coloring agents, as well as aggregates such as dredged sand, slaked lime, and insulators as necessary. Can do.

  The polyol emulsion composition can be cured by combining with an isocyanate compound, a hydraulic cement composition and a conventional formulation, and used as a polyurethane-based cement composition.

  Hereinafter, the present invention will be described in detail with reference to examples and comparative examples. Table 1 shows the results.

  Dismophen 1150 (Sumitomo Bayer Urethane Co., Ltd., trade name, castor oil-modified polyol, hydroxyl value: 165 mg KOH / g), 55 parts by weight, DKS NL-Dash403 (Daiichi Kogyo Seiyaku Co., Ltd., trade name, polyoxyalkylene lauryl ether) -Based nonionic surfactant, HLB: 6.5) 2 parts by weight were added, 33 parts by weight of tap water was added while stirring with a disper-type stirrer and stirred for 2 minutes to obtain an emulsion, and ET-6G403 (large) A polyol emulsion of the polyurethane cement composition of Example 1 was added by adding 10 parts by weight of Nissei Kagaku Kogyo Co., Ltd. (phthalocyanine green epoxy resin toner).

  Example 2 was carried out in the same manner as Example 1 except that ET-6G403 of Example 1 was changed to FTR-5560 (Daiichi Seika Kogyo Co., Ltd., trade name, phthalocyanine green polyol resin toner).

  Example 3 was performed in the same manner as Example 1 except that ET-6G403 of Example 1 was changed to STNS-4787 (Daiichi Seika Kogyo Co., Ltd., trade name, phthalocyanine green polyester resin toner).

  Example 1 except that NL-Dash403 of Example 1 was changed to DKS NL-40 (Daiichi Kogyo Seiyaku Co., Ltd., trade name, polyoxyethylene lauryl ether nonionic surfactant, HLB: 9.5). Similarly, it was set as Example 4.

  Example 5 was carried out in the same manner as Example 2 except that NL-Dash 403 of Example 2 was changed to DKS NL-40.

  Example 6 was carried out in the same manner as Example 3 except that NL-Dash 403 of Example 3 was changed to DKS NL-40.

Comparative Example 1
NL-Dash403 of Example 1 was used as Neugen XL400 (Daiichi Kogyo Seiyaku Co., Ltd., polyoxyalkylene branched decyl ether nonionic surfactant, HLB: 18.4), and ET-6G403 was used as EP-510 (Daiichi Seimitsu). Comparative Example 1 was carried out in the same manner as in Example 1 except that it was changed to Chemical Industries, Ltd. and phthalocyanine green water-dispersed toner.

Comparative Example 2
Comparative Example 2 was performed in the same manner as Comparative Example 1 except that Neugen XL400 of Comparative Example 1 was changed to Emulgen 1118S-70 (Kao Corporation, trade name, polyoxyethylene alkyl ether nonionic surfactant HLB: 16.4). It was.

Emulsion type determination method:
1 ml of the polyol emulsion of Examples and Comparative Examples was taken with a syringe and dropped into 100 ml of water at 20 ° C. and allowed to stand. After 15 minutes, the emulsion kept in the form of oil droplets was determined as W / O, and the emulsion dispersed in water was defined as O / W. As an example of the W / O, the one on the left in FIG. 1 includes a plurality of oil droplets. O / W is on the right side of FIG.

Emulsion stirring stability test method:
Visual observation 100 ml of the polyol emulsion of Examples and Comparative Examples was put on a disper type stirrer and stirred at 2000 rpm for 15 minutes. This was transferred to a graduated cylinder with a lower cock and allowed to stand for 15 minutes, and separation of the resin content was confirmed visually. When the volume of the resin layer accumulated on the upper part is smaller than 5 ml, “◯” is judged, and when it is 5 ml or more, “×” is judged.
・ Upper heating residue (%)
After the above visual judgment, about 50 ml of material was extracted from the lower cock, and the remaining one was stirred and sampled about 2 g. This was heated in accordance with the method of JIS K5601-1-2 (1999) under the condition of 150 ° C. for 2 hours, and the heating residue was measured according to the following calculation method.
(Sample weight after heating / sample weight before heating) × 100 = residue on heating (%)
・ Lower heating residue (%)
About 2 g of the 50 ml material extracted from the lower cock was stirred and sampled. The heating residue was measured in the same manner as described above.

Hardened product finish test method:
-Upper finish 30 g of Sumijoule 44V20 and 30 g of white cement, 45 g of No. 5 cinnabar sand, 45 g of No. 6 cinnabar sand added to 30 g of the material extracted at the time of the upper heating residue test and mixed and stirred on a slate plate The coating was spread and cured at a thickness of about 3 mm, and the surface finish was confirmed.
Those in which abnormalities such as blistering and cracking were observed were rated as x, and those in which abnormalities were not recognized were marked as ◯.
-Lower finish Using the material extracted during the lower heating residue test, confirmation was performed in the same manner as the upper finish.

It is a substitute photograph of the left side W / O and right side O / W example of determination of the type of emulsion.

Claims (3)

  A polyurethane-based cement composition comprising a hydraulic cement, water, a polyol, and an isocyanate compound, wherein the water dispersion of the polyol is a water-in-oil type.   2. The polyurethane cement composition according to claim 1, wherein the coloring is a non-aqueous toner.   A method for producing a polyurethane-based cement comprising blending a non-aqueous toner with a water-dispersed polyol which is a water-in-oil type of the polyurethane-based composition according to claim 1.