JPH0678682B2 - Self-leveling material - Google Patents

Description

TECHNICAL FIELD The present invention relates to a composition of a synthetic resin self-leveling material (hereinafter referred to as SL material) used for leveling of a ground floor in buildings, warehouses and the like.

[Conventional technology]

Conventionally, as the above-mentioned leveling material, a gypsum-based or cement-based inorganic material-based leveling material, a synthetic resin-based leveling material to which an inorganic-based aggregate such as calcium carbonate is added, and the like are known.

[Object of the Invention]

In TV broadcasting stations, automated warehouses, etc., a smoother floor surface is required so that a stable image can be sent when a TV camera is moved, or a load of a loaded product does not collapse. In the construction of the floor surface, not only the conventional inorganic material-based leveling material but also the synthetic resin-based leveling material could not obtain sufficient smoothness. Usually, an inorganic material-based leveling material such as cement-based has a flatness of about 6 mm for a length of 3 m, and even a synthetic resin-based leveling material has a flatness of about 4 mm.

An object of the present invention is to provide a synthetic resin SL material that can obtain an ultra-smooth floor finish such as a flatness of 2 mm or less / 3 m, which has not been obtained by conventional leveling materials.

[Means for achieving the purpose]

The applicant of the present application disclosed a synthetic resin SL material in Japanese Patent Application No. 63-171290 (Japanese Patent Laid-Open No. 2-49064), and the smoothness of the floor finish obtained by using the SL material is 2.5. It is about 3mm / 3m. As a result of the subsequent studies, the present applicants have conducted a synthetic resin coating treatment on a lightweight aggregate to be added and mixed in a synthetic resin in advance, and by adding this to the synthetic resin, the object of the present invention is We have come to get a smooth floor finish.

In the preparation of the synthetic resin-coated lightweight aggregate (hereinafter referred to as the coated aggregate) which is also the gist of the present invention, the liquid synthetic resin used may be epoxy resin, polyurethane resin, silicone resin, or the like. , Hardness after curing,
Epoxy resins are preferable from the viewpoint of durability and the like, and among them, epoxy resins which are liquid at room temperature such as bisphenol A type and bisphenol F type are preferable, and butyl glycidyl ether, o-cresyl glycidyl ether and the like for adjusting the viscosity. Reactive diluents, non-reactive diluents such as DOP, DBP and benzyl alcohol, and surfactants may be added, but it is not necessary to add a curing agent. Further, the lightweight aggregate may be coated with only a hardening agent which is liquid at room temperature such as diethylenetriamine and triethylenetetramine, or the above diluent and the like.

As the lightweight aggregate, an inorganic aggregate mainly composed of silica, alumina or the like or a synthetic resin aggregate such as polyethylene, polyvinyl fluoride, polyvinylidene chloride or the like having an apparent specific gravity
Microspheres having a particle size of 3.0 or less and a particle size of 20 to 500 microns are preferable, and hollow bodies or foams of the aggregate can be used, and they may be metal-plated or coated. Examples of commercially available products include Show Balloon BS: Show Balloon BS (trade name), Nippon Philite Co., Ltd .: Philite (trade name), Asahi Glass Co., Ltd. Q-CEL (trade name), and the like. If the apparent specific gravity of the lightweight aggregate is high, it will settle in the lower layer of the SL mixture, and if it is low, it will float. Therefore, the apparent specific gravity of the lightweight aggregate is the specific gravity of the synthetic resin. It is preferably about the same. Regarding the particle size, if the particle size is less than 20 microns, the formulation solution will thicken, thixotropic properties will increase and the self-leveling property will deteriorate, while if the particle size exceeds 500 microns, the surface finish appearance will deteriorate. There are difficulties. The lightweight aggregate is preferably added in an amount of 260 parts by weight or more with respect to 100 parts by weight of the above synthetic resin, and less than 260 parts by weight is putty-like and loses fluidity, which is not preferable.

The synthetic resin to which the coated aggregate prepared as described above is added and mixed is an epoxy resin, a polyurethane resin, a silicone resin or the like. Among these, an epoxy resin is preferable, and the epoxy resin is bisphenol A.
-Type, bisphenol F type, etc. liquid epoxy resins at room temperature, and as curing agents, amines that are liquid at room temperature and harden at room temperature, such as diethylenetriamine and triethylenetetramine, are preferable. It is preferably 50 to 500 parts by weight with respect to 100 parts by weight of the synthetic resin.

Other additives include antifoaming agents, surfactants, fillers such as silica powder, butyl glycidyl ether, o-cresyl glycidyl ether, reactive diluents such as p-tert butylphenyl glycidyl ether, DOP, DBP, Non-reactive diluents such as benzyl alcohol, high boiling hydrocarbon compounds and the like may be used.

[Action]

The SL material of the present invention has a lightweight aggregate that is added and mixed and is coated with a synthetic resin in advance. Therefore, the coated aggregate and the main component synthetic resin have excellent wettability and fluidity, and have a better self-leveling property. It becomes the SL material which has.

〔Example〕

Apparent specific gravity of aluminosilicate as a lightweight aggregate is 0.
7, 350 parts by weight of micro hollow spheres (Philite 52 / 7S manufactured by Nippon Philite Co., Ltd.) having a particle diameter of 150 μ, and 70 parts by weight of a bisphenol A glycidyl ether type epoxy resin having an epoxy equivalent of 190 as a synthetic resin for coating and reactive dilution. The agent butyl glycidyl ether (30 parts by weight) is sufficiently kneaded to obtain a coated aggregate. Next, 70 parts by weight of the above bisphenol A glycidyl ether type epoxy resin and a reactive diluent butyl glycidyl ether were added to the synthetic resin as the main component of the SL material.
30 parts by weight, a mixture of 65 parts by weight of a curing agent benzylethylenediamine, 170 parts by weight of the above coated aggregate, 0.2 parts by weight of other silicone-based defoaming agent, 0.5 parts by weight of a fluorosurfactant
The SL material of the present invention is obtained by adding and mixing parts by weight.

Table 1 shows the properties of the SL material having the above composition according to the present invention and the SL material in which the lightweight aggregate in the SL material is not resin-coated as a comparative example.

[Effect] As shown in Table 1, the SL material of the present invention can improve the leveling property as a lightweight SL material without changing the various properties, and is very suitable for the construction of a floor surface that requires a smoother finish. It is valid. Also, unlike cement-based and gypsum-based leveling materials, there is an advantage that construction can be performed in a short period of time.

Claims (2)

[Claims] 1. A self-leveling material, characterized in that a lightweight aggregate coated with a liquid synthetic resin is mixed with the synthetic resin. 2. The self-leveling material according to claim 1, wherein the lightweight aggregate has an apparent specific gravity of 3.0 or less and a particle diameter of 20 to 500 microns.