JPH037706B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a surface treatment agent used for coating the surface of a caulking material with an ordinary water-based coating material. Conventionally, various types of caulking materials have been used in large quantities for filling joints and around sash in building components, as well as for glass inlays, but when applying subsequent decorative coatings, it is necessary to apply the caulking to the caulking areas. It is normal to avoid adhesion, and if the caulking material is applied to the caulking material, the ingredients in the caulking material may cause peeling or peeling due to poor adhesion.
Paint film defects and deterioration such as shrinkage and discoloration were occurring. In particular, the transfer of the plasticizer plasticizes the dried coating film of the decorative coating material, and the upper part of the caulking material on the surface of the decorative coating material is contaminated. As a result, in addition to damaging the aesthetic appearance of buildings, various accidents have frequently occurred in the caulking materials.However, it is now possible to eliminate the causes of such defects and further improve the aesthetics and protective functions of the coating materials. Nothing had been done until then. While improving the quality of the caulking material itself in order to correct the above-mentioned drawbacks, the inventor of the present invention has been engaged in intensive research into treatment methods, and has developed an epoch-making caulking material for applying a coating material to the surface of the caulking material. This is the completed surface treatment agent. That is, the present invention provides a method for applying two or more liquids, a liquid containing a specific thermosetting resin as an essential component and a liquid containing a curing agent, to the surface of a one-component solvent-based caulking material, which is said to be subject to particularly rapid deterioration and change. By applying a surface treatment agent, it is possible to prevent the problems of conventional methods even if a normal water-based coating material is subsequently applied. Hereinafter, the configuration of the present invention will be explained in detail. The caulking material forming the surface targeted by the present invention is one-component solvent type. Here, one-component solvent type refers to a two-component type in which two components, a base and a hardening agent, are mixed during use, but can be applied as is with one component, and is an organic solvent-based resin rather than a water-dispersible resin or water-based resin. It is made of resin varnish. Among these, those that cure with moisture include polysulfide and polyurethane, and those that cure with dryness include acrylic and butyl rubber.
These caulking materials are made of corresponding synthetic polymers, namely thiocol polymers, other polysulfides, urethane resins, acrylic urethane copolymer resins, epoxyurethane copolymer resins, other urethane copolymer resins, acrylic resins, acrylic rubber, The main component is butyl rubber, and the synthetic polymer contains additives such as antioxidants and ultraviolet absorbers in addition to solvents, plasticizers, and fillers. Next, the surface treatment agent is a liquid containing as an essential component a thermosetting resin selected from the group of urethane resins, polyester resins, epoxy resins, and acrylic resins, i.e., a reaction between a base material and the resin contained in this base material. It consists of two or more liquids containing a curing component or a catalyst that aids curing as an essential component, that is, a curing agent. Among these, base materials are those that simply consist of an essential thermosetting resin (solvent-free type), those that contain a solvent, and those that contain reinforcing fillers and pigments, depending on the degree of polymerization, etc. Although the properties are slightly different, non-sag type fluidity is preferred when applying the caulking material in the form of a putty to the surface of the caulking material. However, it is not necessarily limited to the non-sag type. Furthermore, when the caulking material and the water-based coating material are different, the type of synthetic resin may be appropriately selected so that it adheres closely to both. Next, the curing agent is appropriately selected depending on the type of thermosetting resin contained in the base material. For example, in the case of urethane resin, acrylic polyol, etc., tolylene diisocyanate, hexamethylene diisocyanate, diphenylmethane When the isocyanate-based prepolymer such as diisocyanate is an epoxy resin, curing agents such as amines and polyamide resins are typically used. Also,
In the case of polyester resins, curing catalysts such as benzoyl peroxide and methyl ethyl ketone peroxide are typically used as curing agents. As described above, the surface treatment agent of the present application is used by mixing at least two components, a base and a curing agent, and optionally a third component such as a curing accelerator and a diluent at the time of construction. When the surface treatment agent of the present application is applied in the form of a putty to the surface of a caulking material, the putty-like material is applied not only to the caulking material but also to the edges of the building components forming the joints. , subsequent coating materials can be applied efficiently. The surface of the caulking material treated with the surface treatment agent can be sandpapered after the surface treatment agent has hardened, and can be sanded depending on the degree of need. The material part has almost the same base function as the building component part, and can be used with water-based coating materials, such as synthetic resin emulsion paint, cement sand wall spray material, synthetic resin emulsion sand wall spray material, multi-layer pattern spray material,
Synthetic resin emulsion thick coating materials, cement thick coating materials, elastic decorative coating materials, design roller coating materials, synthetic resin emulsion pattern paints, multi-colored pattern paints, etc. can be applied according to normal painting specifications. The present invention has been completed using the above-mentioned surface treatment agent and coating material application method, so that the surface of a building component having joints completely decorated with a coating material becomes seamless and can be used. In order not to impair the quality of the caulking material itself, it fully demonstrates the aesthetic function, the original protective function of the coating material, and the waterproofing function of the caulking material. In addition, due to the good adhesion of the coating material, which was previously considered to be a point of separation, the defects of peeling and shrinkage are eliminated, and of course it has almost no effect on the expansion and contraction of the caulking material, and it is not included in the caulking material. This eliminates the discoloration and discoloration caused by hardeners and other additives, making it possible to establish a completely innovative construction method. An embodiment will be described below with reference to FIG. 1 of the drawings. Example 1 Figure 1 shows a cross-sectional view of a joint part of a building component made of a PC board, in which a joint 3 is formed by component A1 and component B2, the length of the oblique side 4 is approximately 10 mm, and the structure The contact points of the hypotenuses of materials A and B are perpendicular.
For joint 3, use one-component urethane caulking material "Sikaflex 1a" manufactured by Nippon Silica Co., Ltd. 5
was placed flush with the constituent materials A1 and B2, and after being left for 48 hours, a surface treatment agent 6 consisting of the following components was applied to a thickness of about 0.5 mm. (Composition of surface treatment agent) Polymerized fatty acid modified epoxy resin (Epicote 871 manufactured by Yuka Ciel Epoxy Co., Ltd.) 100 parts by weight Allyl glycidyl ether 10 parts by weight Silica fine powder 50 parts by weight Calcium carbonate fine powder 100 parts by weight Triethylamine 12.5 parts by weight Surface treatment agent After 6 has hardened, commercially available synthetic resin emulsion sand wall-like spray material 7 (Shipokaken, manufactured by Shikoku Kaken Kogyo Co., Ltd.) is made to a thickness of about 1.5 mm and is applied to the entire surface of component parts 1 and 2 and caulking material part 5. The specimen thus obtained has a total size of 60 cm x 60 cm.
The center part is the joint. When we tested this specimen for adhesion strength and weather resistance, we found that
The results shown in Table 1 were obtained. Examples 2 to 4 In Example 1, the same tests as in Example 1 were conducted except that a surface treatment agent having the following composition was used. The results are shown in Table 1. "Surface treatment agent of Example 2" Epoxy resin emulsion (solid content 50%) (Epiclon EM- manufactured by Dainippon Ink and Chemicals Co., Ltd.)
80) 100 parts by weight Silica fine powder 50 parts by weight Calcium carbonate fine powder 100 parts by weight Modified fatty acid polyamine 25 parts by weight "Surface treatment agent of Example 3" Tolylene diisocyanate 7 parts by weight 3001) 400 parts by weight of amine catalyst 6 parts by weight "Surface treatment agent of Example 4" Unsaturated polyester varnish (Goselac 309B styrene solution manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd., 65%)
100 parts by weight Talc 120 parts by weight Fine asbestos powder 5 parts by weight Fine silica powder 2 parts by weight Methyl ethyl ketone peroxide 1 part by weight Cobalt styrene naphthenate solution, 10%)
0.1 parts by weight

[Table] The test methods for (a) to (d) above are based on JIS
In accordance with A9609, (a) and (d) mainly focused on the joints, and in particular (d), 5% black ink diluted water was used instead of soap, and after 500 strokes, it was washed with clean water. or,
(e) was left in a fade meter for 96 hours. In particular, the appearance immediately after each test was carefully observed, but no significant discoloration or fading or other defective factors were observed.

[Brief explanation of the drawing]

FIG. 1 represents a cross-sectional view when the present invention is used. 1... Constituent material A, 2... Constituent material B, 3... Joint portion, 4... Hypotenuse, 5... Caulking material, 6... Surface treatment agent, 7... Synthetic resin emulsion sand wall-like spray material.

Claims (1)

[Scope of Claims] 1. A surface treatment agent used for coating the surface of a one-component solvent-based caulking material with a water-based coating material, comprising:
Surface treatment of a caulking material characterized by comprising two or more liquids: a liquid containing a thermosetting resin selected from the group of urethane resins, polyester resins, epoxy resins and acrylic resins, and a liquid containing a curing agent. agent. 2. Surface treatment of caulking material according to claim 1, wherein the one-component solvent-based caulking material is one type selected from the group of polysulfide type, polyurethane type, acrylic type, and butyl rubber type. agent.