JP2019026789A - Binder for building structure - Google Patents

Abstract

To provide a binder that suppresses volume shrinkage at the time of curing of a binder and can strongly bond a fixing member such as an anchor bolt.SOLUTION: A binder for building structure contains: a radical curable resin; an organic peroxide; an expansion material that reacts with water to increase its volume; and water. Based on the radical curable resin 100 parts, the content of the expansion material is 5-100 parts, and the weight ratio of water/expansion material is 0.05-1.0.SELECTED DRAWING: None

Description

  The present invention relates to a building structure fixing agent for drilling a base material such as concrete or rock, and fixing a fixing member such as an anchor bolt in the drilling.

  Conventionally, organic peroxides are used as polymerization initiators such as unsaturated polyester resins, epoxy acrylate resins, and polyester acrylate resins that are radical curable resins. Organic peroxides are classified and used according to the purpose of use and use temperature, and are often used in combination with curing accelerators such as aromatic amines at low temperatures and normal temperatures.

  Applications of radical curable resins using an organic peroxide as a curing agent are diverse, such as corrosion-resistant lining, sheet adhesives, mold molding, and resin anchors. As resin for resin anchor, unsaturated polyester resin and epoxy acrylate resin are common. Resin anchors are used in applications where anchor bolts are embedded in concrete structures or bedrock, and equipment is installed. Two-component system of curable viscous liquid resin and hardener, or aggregate and filler are added. Capsule type that has a three-component system, capsules that are encased in glass or film, and that is embedded with anchor bolts or rebars with a hammer, or rotated and blown with a hammer drill, etc., and hard cases and films There is an injection type in which the encapsulated main agent and curing agent are extruded with a dispenser and mixed with a static mixer.

  The former capsule type means that a fixing member is inserted by inserting a capsule containing a fixing agent into a perforation, crushing the capsule while hitting and rotating an anchor bolt, etc., and mixing the main agent of the fixing agent and a curing agent. It is a fixed type. As capsules used in this type, those described in Patent Documents 1 to 3 below are known.

  Next, the latter injection type includes an on-site preparation type and a cartridge type. In the on-site preparation type, the main agent and the curing agent contained in each container are mixed and injected into the perforations, and the fixing member is fixed. In addition, in the case of cartridge type, the main agent and curing agent in the cartridge are ejected in an appropriate amount by hand gun or hydraulic force, etc., and the fixing agent mixed by a mixer such as a static mixer is injected into the perforation and fixed Fix the member. As this type, what is described in the following patent document 4 is known.

Japanese Patent Publication No.62-37076 JP 61-243876 A JP-A 61-254681 JP 59-24714 A

Although the radical curable composition of the prior art fixing agent is cured by reaction with the organic peroxide, volume shrinkage occurs at the time of curing, so there is a gap between the fixing agent and the base material in the perforation, and sufficient There is a problem that it is difficult to obtain a sufficient fixing strength or cause a decrease in strength.
Under such circumstances, the problem to be solved by the present invention is to provide a fixing agent capable of reducing volume shrinkage when the fixing agent is cured and firmly fixing a fixing member such as an anchor bolt.

As a result of intensive studies to solve the above-mentioned problems and repeated experiments, the present inventors have incorporated an expanding material capable of increasing the volume by reacting with water into the fixing agent at a predetermined ratio. Unexpectedly, it was found that a gap was formed between the base material and the base material, and sufficient fixing strength could not be obtained or a decrease in strength could be avoided, leading to the completion of the present invention. It is a thing.
That is, the present invention is as follows.

[1] An adhesive for a building structure containing a radical curable resin; an organic peroxide; an expanding material that reacts with water to increase its volume; and water, with respect to 100 parts of the radical curable resin. The above-mentioned adhesive for building structures, which contains 5 to 100 parts of the expansion material, and has a water / expansion material weight ratio of 0.05 to 1.0.
[2] The building according to [1], wherein the expansion material is selected from the group consisting of calcium sulfoaluminate (CSA), quicklime, Group 2 element oxide, and Group 2 element sulfate. Adhesive for structures.
[3] The building structure fixing agent according to [1] or [2], further including an inorganic filler.
[4] The building structure fixing agent according to [3], wherein the inorganic filler has a Mohs hardness of 4 or more.
[5] The sticking agent for building structures according to [3] or [4], wherein a surface of the inorganic filler is subjected to a hydrophobic treatment.
[6] The building structure fixing agent according to any one of [1] to [5], further including a radical polymerizable monomer.
[7] The building structure fixing agent according to any one of [1] to [6], which is used for fixing an after-construction anchor.

  The sticking agent for building structures according to the present invention reduces the volume shrinkage when the sticking agent is cured, and exhibits the effect of firmly fixing a fixing member such as an anchor bolt.

Hereinafter, embodiments of the present invention will be described in detail.
The building structure sticking agent of the present embodiment is a building structure sticking agent containing a radical curable resin; an organic peroxide; an expansion material that reacts with water to increase volume; and water. 5 to 100 parts of the expansion material is contained with respect to 100 parts of the radical curable resin, and the weight ratio of water / expansion material is 0.05 to 1.0.

  The radical curable resin is not particularly limited, and examples thereof include epoxy acrylate resins, vinyl ester resins, polyester acrylate resins, urethane acrylate resins, and unsaturated polyester resins.

  The organic peroxide is not particularly limited and includes diacyl peroxides, ketone peroxides, hydroperoxides, dialkyl peroxides, peroxyketals, alkyl peresters, peroxycarbonates, and the like. , Benzoyl peroxide, methyl ethyl ketone peroxide, lauryl peroxide, dicumyl peroxide, cumene hydroperoxide, and the like, and most commonly benzoyl peroxide (BPO, benzoyl peroxide). Organic peroxides are generally inorganic substances such as calcium sulfate, calcium carbonate, aluminum hydroxide, dimethyl phthalate, dibutyl phthalate, dicyclohexyl phthalate, aliphatic hydrocarbons, aromatic hydrocarbons, silicone oil, liquid paraffin, polymerizable monomers, water It is diluted with a diluent such as

There are no particular restrictions on the expansion material that expands by reacting with water, but preferably a group consisting of calcium sulfoaluminate (CSA), quicklime, Group 2 element oxide, and Group 2 element sulfate. Chosen from. In the present embodiment, the use ratio of the expansion material in the fixing agent is 5 to 100 parts, preferably 10 to 80 parts, relative to 100 parts of the radical curable resin.
There is no restriction | limiting in particular, Water can be drinking water, ion-exchange water, distilled water, and ultrapure water. In this embodiment, the ratio of water used in the fixing agent is a water / expansion material weight ratio of 0.05 to 1.0, preferably 0.1 to 0.8.

  The building structure fixing agent of this embodiment may preferably further contain an inorganic filler. Examples of the inorganic filler include inorganic compounds such as calcium sulfate, barium sulfate, silica, calcium carbonate, aluminum hydroxide, alumina, iron oxide, quartz sand, quartz sand, quartz powder, gypsum, glass flake, glass microballoon, and cement. Examples include powders. The inorganic filler preferably has a Mohs hardness of 4 or more. The powder of the inorganic compound is preferably one in which the surface of the powder has been subjected to a hydrophobic treatment from the viewpoint of the mixing effect of the fixing agent with the resin, the effect of adjusting the viscosity and the degree of variation. The particle size of the powder is preferably adjusted appropriately within the range of 1 to 100 μm. As for the usage-amount of the inorganic filler in the fixing agent of this embodiment, 100-300 parts of an inorganic filler are preferable with respect to 100 parts of radical curable resins, More preferably, it is 140-260 parts.

  The building structure fixing agent of the present embodiment is preferably diluted with a radical polymerizable monomer. The radical polymerizable monomer means a compound having one or more polymerizable double bonds in the molecule. The number of polymerizable double bonds that the radical polymerizable monomer has is preferably 1 to 4. The radical polymerizable monomer is not particularly limited, but styrene, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, 1,4-butanediol dimethacrylate, 1,6-hexanediol dimethacrylate, Neopentyl glycol dimethacrylate, hydroxyethyl methacrylate, hydroxybutyl methacrylate, isobornyl methacrylate, trimethylolpropane trimethacrylate, ethylene oxide adduct dimethacrylate of bisphenol A, triallyl trimethate, etc. Methacrylate monomers are preferred. Moreover, it is preferable that a radically polymerizable monomer is a non-styrene-type monomer from a viewpoint of harmfulness. A methacrylic monomer is more preferable than an acrylic monomer from the viewpoint of skin irritation and alkali resistance.

  A curing accelerator may be added to the fixing agent of this embodiment. The curing accelerator is not particularly limited and may be any tertiary aromatic amine having a hydroxyl group in the nitrogen substituent, such as N, N-di (2-hydroxypropyl) -p-toluidine, N -Phenyldiethanolamine, p-tolyldiethanolamine, N, N-bishydroxybutyl-p-toluidine and the like can be mentioned, and N, N-di (2-hydroxypropyl) -p-toluidine effective in a small amount is preferable. Further, the curing accelerator may be mixed with the main agent at the time of use separately from the main agent as long as avoiding direct contact with the curing agent, or may be previously mixed in the resin. The content may be about 0.1 to 5 wt%, but preferably 0.5 to 1.5 wt%. The curing accelerator may be used alone or in combination of two or more, and further used in combination with conventionally used curing accelerators such as N, N-dimethylaniline and cobalt naphthenate. You can use it.

  If necessary, a polymerization inhibitor, a colorant, a pigment, an ultraviolet absorber, a surfactant and the like can be further added to and mixed with the fixing agent.

  Examples of the polymerization inhibitor include quinones, hydroquinones, and phenols. For example, benzoquinone, p-benzoquinone, p-toluquinone, p-xyloquinone, naphthoquinone, 2,6-dichloroquinone, hydroquinone, p-t-butyl. Catechol, 2,5-di-t-butylhydroquinone, monomethylhydroquinone, p-methoxyphenol, 2,6-di-t-butyl-p-cresol, hydroquinone monomethyl ether, etc. can be added in necessary amounts. In some cases, coloring may change with amines, and it is preferable to add hydroquinones and phenols, and the most effective ones are cresols.

  A colorant, a pigment, and an ultraviolet absorber are added as needed as a light-resistant stabilizer that prevents the gelation of the resin due to sunlight or the like. Examples of these additives include lake pigments, azo pigments, phthalocyanine pigments, higher organic pigments and inorganic pigments, single products thereof, and mixtures thereof. For example, “Toner Yellow”, “Toner Brown”, “Toner Green” (manufactured by Takeda Pharmaceutical), “Colortex Brown”, “Colortex Orange”, “Colortex Maron” (manufactured by Sanyo Dye) "Oplas Yellow" (manufactured by Orient Chemical Co., Ltd.) can be added.

  The surfactant includes an anionic type, a cationic type, a nonionic type and an amphoteric type, and an anionic type which is effective in stabilizing the tensile strength on the wet surface and reducing the viscosity is preferable. Anionic surfactants include alkyl ether carboxylates, sodium methacrylate-methoxypolyoxyethylene methacrylate copolymers, etc. as carboxylates, dialkylsulfosuccinates, alkylallylsulfosuccinates, alkylsulfoacetic acids as sulfonates. Examples of sulfates such as salts and α-olefin sulfonates include alkyl allyl sulfates, alkyl ether sulfates, and phosphate ester salts such as alkyl ether phosphates. The amount used is not particularly limited, but is preferably suppressed to 30 wt% or less in terms of strength.

  The container for housing the building structure sticking agent of the present embodiment may be any container that can be sealed so that it does not break during transportation or storage, and does not leak the sticking agent. Glass, ceramics, synthetic resin, paper , Film, metal, etc., and there are capsules, cartridges, cans, packs, etc. In this case, what is necessary is just to select suitably the shape and material of a container according to the use of a capsule type | mold and an injection | pouring type | mold. The curing agent container is preferably selected in consideration of safety according to the characteristics of the curing agent.

Hereinafter, the present invention will be specifically described based on examples.
[Example 1]
(1-1) Preparation of Radical Curable Resin (Base Resin) Bisphenol A EO adduct dimethacrylate 65 wt%, radical polymerizable monomer as a mixture of diethylene glycol dimethacrylate 35 wt% 100 g, curing accelerator N, 1 g of N-di (2-hydroxypropyl) -p-toluidine and 0.3 g of 2,6-di-t-butyl-p-cresol (BHT) as a polymerization inhibitor were mixed with a stirrer at 500 rpm for 2 minutes to form a base. A resin was prepared.

(1-2) Preparation of Fixing Agent As an organic peroxide, benzoyl peroxide 36 wt% wet product (BPO 36%, water 11%, aluminum hydroxide 53%) 22.2 g, water 0.6 g, average particle size 20 μm 141.8 g of silica sand, 106.4 g of calcium carbonate having an average particle size of 10 μm, 5.0 g of an expansion material (Pacific Hyperexpan (for structure), Taiheiyo Material Co., Ltd.), and 100.0 g of the base resin were mixed at 2000 rpm with a stirrer. The mixture was mixed for 2 minutes to prepare a fixing agent.

(2) Evaluation (2-1) Measurement of fixing strength A concrete block with a size of 500 x 500 x 1000 mm and a compressive strength of 24.1 N / mm ² is drilled with a hole with a bore diameter of 18 mm and a bore length of 80 mm, and a blower and nylon brush Then, the above-mentioned fixing agent was filled in the hole, and all screw bolts (material SNB7) having an outer diameter of 16 mm were inserted and fixed. After curing at 20 ° C. for 1 hour, curing was performed at 40 ° C. for 7 days, and the fixing strength (Ton) was measured. The results are shown in Table 1 below.

(2-2) Appearance inspection of cured adhesive agent The appearance of the prepared adhesive agent cured product was visually observed and evaluated according to the following evaluation criteria.
If there is no change in appearance: “◯”,
If the cured product is warped or has small cracks: “△”
When a crack occurs in the cured product: “×”.
The results are shown in Table 1 below.

(2-3) Measurement of expansion coefficient The obtained sticking agent was poured into a stainless steel mold having a diameter of 76 mm and a thickness of 4 mm so as not to entrain air, cured at 20 ° C. for 30 minutes, and cured. Immediately after curing, the cured product was removed from the frame, the outer diameter of the cured product was measured with calipers, and this was taken as the initial measurement value R1. The cured adhesive was allowed to stand at 20 ° C. for 2 weeks, the outer diameter of the cured product was measured with calipers, and this value was designated as R2. The rate of change of R2 from R1 was defined as expansion rate (%) = (R2−R1) ÷ R1 × 100. The results are shown in Table 1 below.

[Examples 2 to 10, Comparative Examples 1 to 4]
In the same manner as in Example 1, a benzoyl peroxide 36 wt% product (11% water-humid body, 53% aluminum hydroxide product), water, silica sand, calcium carbonate, expansion material, and base resin were mixed with a stirrer according to the composition shown in Table 1 below. Was mixed at 2000 rpm for 2 minutes to prepare a fixing agent. In the same manner as in Example 1, the fixing strength was measured, the appearance inspection of the fixing agent cured product, and the expansion coefficient were measured. The results are shown in Table 1 below.

  The adhesive for building structures according to the present invention reduces the volume shrinkage at the time of hardening of the adhesive, and exerts the effect of firmly fixing the fixing member such as an anchor bolt, so that the base material such as concrete and bedrock is perforated. In addition, it can be suitably used as a building structure fixing agent for fixing a fixing member such as an anchor bolt in the perforation.

Claims (7)

  An adhesive for building structures, comprising: a radical curable resin; an organic peroxide; an expanding material that reacts with water to increase volume; and water; and the swelling with respect to 100 parts of the radical curable resin. 5 to 100 parts of the material, and the weight ratio of water / expandable material is 0.05 to 1.0.   The fixing for building structures according to claim 1, wherein the expansion material is selected from the group consisting of calcium sulfoaluminate (CSA), quicklime, group 2 element oxides, and group 2 element sulfates. Agent.   The sticking agent for building structures according to claim 1 or 2, further comprising an inorganic filler.   The sticking agent for building structures according to claim 3, wherein the inorganic filler has a Mohs hardness of 4 or more.   The sticking agent for building structures according to claim 3 or 4, wherein a surface of the inorganic filler is subjected to a hydrophobic treatment.   The fixing agent for building structures according to any one of claims 1 to 5, further comprising a radical polymerizable monomer.   The fixing agent for building structures according to any one of claims 1 to 6, which is used for fixing a post-construction anchor.