JP5018694B2 - Fill joint material and joint joint construction method - Google Patents

Description

  The present invention relates to a joint material for filling joints between tiles by a joint joint construction method, and a joint joint construction method.

  When tiles are attached to a wall surface or a floor surface, the tiles are often pasted with a mortar or an adhesive with a predetermined joint interval between the tiles, and then the joints are filled by a joint joint method.

  The joint joint method is a joint filling method in which slurry-like joint material is applied to the entire surface of the tile attaching surface, spread and filled, and then the joint material on the tile surface is wiped off (for example, the following) Patent Document 2).

As a joint material, an epoxy joint material using an epoxy resin as a binder is widely used (for example, Patent Document 1 below).
JP 2006-31875 A JP 2000-7861 A

  When the base material of the epoxy-based joint material and the curing agent are mixed, when the reaction between the base material and the curing agent proceeds, the hydrophilicity is lost and it becomes impossible to wipe with water. The wiping time was particularly short in the summer when the reaction was quick. This problem can be solved by using a slow-acting curing agent, but conversely in winter, the curing is too slow and it takes time until it can be used as a tile surface.

  Epoxy resins and their curing agents are relatively high in polymer and have high viscosity. In particular, the viscosity is highly temperature-dependent, and the hardness when kneaded is optimal in summer, but quite heavy in winter. On the other hand, if it is optimized for winter, the viscosity in summer will be too low.

  These problems can be solved by adding a solvent such as toluene. However, after the solvent is volatilized, there is a demerit that a decrease in volume (volume reduction) occurs or the hardness of the joint decreases. The use of a solvent that does not volatilize resolves the loss of weight, but the joint hardness is still low. In addition, the remaining solvent may ooze from the joints and contaminate the tiles and stones. Furthermore, when an organic solvent is used, smell and VOC (volatile organic solvent) may become a problem in the working environment.

  The present invention solves the above-mentioned conventional problems, and provides a joint material for a joint joint that facilitates the application work of the joint material to the tile construction surface and also facilitates the wiping work thereof, and a joint joint construction method. For the purpose.

The joint material for a joint according to the present invention is a joint material for a joint composed of an epoxy resin composition and a curing agent composition added to the epoxy resin composition, and the epoxy resin composition and the curing agent composition. And water is added to one of them, and a powder of hydraulic material is added to the other.

The joint joint method of the present invention is the joint joint method in which the epoxy resin composition and the curing agent composition are mixed, and then the tile construction surface is filled with the joint joint, the epoxy resin composition and the curing agent composition, In the case of mixing, a water joint is applied to adjust the viscosity by adding water, characterized in that a powder of a hydraulic material is added to at least one of the epoxy resin composition and the curing agent composition. Is.

In a coated joint joint material of the present invention, hand of the epoxy resin composition and the curing agent composition contains water, a coated joint method of the present invention, upon mixing of the epoxy resin composition and curing agent composition Add water.

  Therefore, in the joint material for joints to be applied, in which the epoxy resin composition and the curing agent composition are mixed, an emulsion of the epoxy resin, the curing agent, and water is formed, and the joint material of the joint material is formed. Viscosity decreases. Moreover, when the emulsion is formed, the joint material is easily wiped off even when the joint material is being cured after application.

  For this reason, according to the present invention, the application work of the joint material to the tile construction surface becomes easy and the wiping work becomes easy. In particular, when wiping work is described in detail, even if the reaction between the epoxy resin and the curing agent progresses to some extent by emulsification, it is easy to become familiar with water, so the workable time (time until wiping) becomes longer when filling the joint. . Further, since water is used as a solvent, the generation of VOC can be reduced, and the amount of resin can be reduced, leading to cost reduction. Further, since the ratio of the resin to the powder can be reduced, discoloration such as ultraviolet rays can be reduced.

  In the present invention, when a hydraulic material powder is added to the epoxy resin composition and / or the curing agent composition, the hydraulic material reacts with water to form a hydrate, thereby evaporating water. It is possible to prevent (including suppression) the volume reduction of the joints (decrease of the joints). In addition, since the hardness of the hydrate is high, the joint hardness is high.

  Hereinafter, the present invention will be described in more detail.

  Examples of the epoxy resin in the epoxy resin composition used in the present invention include various conventionally known epoxy resins such as bisphenol type epoxy resins such as bisphenol A type and bisphenol F type, novolac type epoxy resins, and linear aliphatic epoxy resins. Can be used.

  On the other hand, the curing agent in the curing agent composition includes aliphatic amines such as diethylenetriamine and triethylenetetramine, aromatic amines such as m-phenylenediamine and diaminodiphenylmethane, phthalic anhydride, hexahydrophthalic anhydride, tetrahydrophthalate. Examples thereof include acid anhydrides, acid anhydrides such as pyromellitic acid anhydride, polysulfide, acid amides, and thiocol.

  Each of the epoxy resin and the curing agent may be aqueous.

  Examples of aqueous epoxy resins include bisphenol A type epoxy resins, novolac type epoxy resins, bisphenol F type epoxy resins, brominated epoxy resins, cycloaliphatic epoxy resins, and the like, or polyester resins, phenol resins, melamine resins, and the like. Among these, water-soluble type, water-dispersed type and the like can be used. In the present invention, a water-dispersed epoxy resin is particularly preferably used.

  An aqueous amine compound can be used as the aqueous curing agent.

  Examples of the aqueous amine compound include aliphatic polyamines, alicyclic polyamines, aromatic polyamines, polyamides, polyamidoamines, heterocyclic amines, etc., or modified products thereof. Etc. can be used. In the present invention, a water-dispersed amine compound is particularly preferably used.

  For the main agent and the curing agent, ethylene resin, vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, epoxy resin, acrylic resin, urethane resin, silicone resin, fluororesin to such an extent that the effects of the present invention are not impaired. Further, it may contain a resin such as cellulose and polyvinyl alcohol.

  Furthermore, the main agent and the curing agent include pigments, aggregates, dispersants, viscosity modifiers, solvents, film-forming aids, plasticizers, antifreezing agents, antiseptics, and antifungal agents so long as the effects of the present invention are not impaired. , Anti-algae, antifoaming agent, leveling agent, pH adjuster, anti-settling agent, anti-sagging agent, matting agent, UV absorber, drying adjuster, coupling agent, dehydrating agent, light stabilizer, antioxidant Further, additives such as water can be contained.

  Examples of pigments include inorganic colors such as titanium oxide, zinc oxide, carbon black, ferric oxide (bengala), lead chromate (molybdate orange), yellow lead, yellow iron oxide, ocher, ultramarine, and cobalt green. Pigments, azo, naphthol, pyrazolone, anthraquinone, perylene, quinacridone, disazo, isoindolinone, benzimidazole, phthalocyanine, quinophthalone, and other organic color pigments, heavy calcium carbonate, clay , Volumetric pigments such as kaolin, talc, precipitated barium sulfate, barium carbonate, white carbon, and diatomaceous earth.

  As the aggregate, quartz sand is suitable, but in the present invention, it is preferable to use a hydraulic material powder as at least a part of the aggregate. As the hydraulic material, cement, gypsum and the like are suitable. Various types of cement such as ordinary cement and alumina cement can be used.

  This hydraulic material reacts with moisture to generate a hydrate, thereby preventing the joint from being lost and increasing the joint hardness.

  In one embodiment of the present invention, water is added to one or both of the main agent (epoxy resin composition) and the curing agent (curing agent composition). In another aspect of the present invention, water is added when mixing the main agent and the curing agent.

  The amount of water added is preferably determined in consideration of the temperature and the like so that the preparation to be applied has the desired appropriate viscosity. Of course, water may be gradually added while stirring to check the viscosity.

  When applying a joint to the tile construction surface according to the present invention, if a preparation containing water, which is a mixture of the main agent (epoxy resin composition), the curing agent and the aggregate, is applied to the tile construction surface and wiped off, Well, the procedure itself of this joint method is the same as the conventional joint method. In performing the above mixing, it is preferable to mix the aggregate with at least one of the main agent and the curing agent, and then mix the main agent and the curing agent. The aggregate may be mixed in the field, or may be mixed in a commercially available main agent or curing agent.

  The mixing ratio of the aggregate, the epoxy resin composition, and the curing agent composition is preferably about 20 to 40 parts by weight as the total amount of the epoxy resin composition and the curing agent composition with respect to 100 parts by weight of the aggregate. The amount of the hydraulic material powder as a part of the aggregate is preferably about 5 to 25 parts by weight with respect to 100 parts by weight of the aggregate other than the hydraulic material.

  Hereinafter, examples and comparative examples will be described. In the following examples, water was added to the curing agent in advance.

  The materials used in the following examples and comparative examples are as follows.

Main agent: Bisphenol A type epoxy resin (JER series 828 manufactured by Japan Epoxy Resin Co., Ltd.)
Curing agent: Polyamidoamine curing agent (fast curing type) (SUNMIDE 335 manufactured by Air Products Japan Co., Ltd.)
Polyamideamine curing agent (slow curing type) (SUNMIDE 76TK manufactured by Air Products Japan Ltd.)
Water-based curing agent (modified aliphatic polyamine-based curing agent) (JER Cure Series 8060 manufactured by Japan Epoxy Resin Co., Ltd.)
Aggregate: No. 7 silica sand and No. 8 silica sand
Titanium oxide powder (average particle size 3μm)
Ordinary cement

[Examples 1-2, Comparative Examples 1-3]
The formulation was prepared by mixing the main agent, curing agent and aggregate at the blending ratio shown in Table 1. In the mixing procedure, first, the main agent and the aggregate were thoroughly mixed, and then the curing agent was added and mixed.

  After this formulation was applied to the tile construction surface, it was wiped off with a sponge soaked with water and filled with joints.

  The size of the tile is 295 × 295 × 9 mm, and the joint spacing is 5 mm. The temperature at the time of construction was 25 ° C.

  Table 1 shows the evaluation results of workability and finish.

  As is clear from the above Examples and Comparative Examples, the joint materials of Examples 1 and 2 are easy to apply and wipe off, and the workable time is sufficiently long. Also, the appearance is good.

  In Examples 1 and 2 to which ordinary cement was added, the hardness of the cured joint was sufficiently high although the amount of the epoxy resin was less than that in Comparative Examples 2 and 3.

Claims (2)

In a joint material for a joint joint comprising an epoxy resin composition and a curing agent composition added to the epoxy resin composition,
A joint material for joints, wherein water is added to one of the epoxy resin composition and the curing agent composition, and a powder of a hydraulic material is added to the other. After mixing the epoxy resin composition and the curing agent composition, after applying to the tile construction surface, in the joint joint construction method to fill the joint by wiping,
In the mixing of the epoxy resin composition and the curing agent composition, water is added to adjust the viscosity ,
A paint joint method, wherein a powder of a hydraulic material is added to at least one of the epoxy resin composition and the curing agent composition .