JPS6049076A - Binder for anchor bolt - Google Patents

Abstract

PURPOSE:The titled inexpensive binder, obtained by encapsulating isocyanate capsules and organic peroxide capsules in main agent capsules consisting of an aliphatic tertiary amine and an unsaturated polyester, etc., capable of providing easy fixing work, and usable for concrete and rocks, etc. CONSTITUTION:A binder for anchor bolts obtained by encapsulating (B) capsules prepared by encasing polyisocyanate or isocyanate prepolymer therein and (C) capsules prepared by encasing an organic peroxide, e.g. benzoyl peroxide, therein in (A) main agent capsules prepared by encasing a main agent consisting essentially of (i) one or more of an aliphatic tertiary amine, e.g. triethanolamine, aliphatic tertiary amine and a polyoxyalkylene ether polyol and an alkylene oxide based polyol containing the added tertiary amine and (ii) an unsaturated polyester, e.g. maleic acid anhydride.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing agent used for inserting an anchor bolt into a hole provided in concrete, rock, etc. and fixing the anchor bolt to concrete or rock.

The fixing agents for anchor bolts currently on the market generally consist of an easily broken base capsule, such as a glass tube, containing a base agent whose main component is unsaturated polyester Japanese resin, and an organic peroxide encapsulated in the base capsule. This fixing agent consists of an enclosed hardening agent capsule. This fixing agent is inserted into the hole where the anchor bolt is to be fixed before the anchor bolt is inserted, and then the anchor bolt is inserted into the hole and the capsule is destroyed by the anchor bolt and fixed. The additives are mixed to cause a curing reaction that fixes the bolt to the hole wall.

This adhesive based on unsaturated polynisdel shrinks during curing, making it difficult to obtain a large adhesive force.In upward-facing holes such as ceilings, the viscosity of the adhesive is affected to some extent, but in places with moisture, the gelation time is particularly high. Because of the long length, there is a problem that it may leak out and make fixing work difficult.

The object of the present invention is to provide a fixing agent for anchor bolts that eliminates this problem.

In order to achieve this object, the present invention combines at least seven types of aliphatic tertiary amines, aliphatic tertiary amines and polyoxyalkylene ether polyols, tertiary amine-added alkylene oxide polyols, and unsaturated polyesters. A main ingredient capsule containing a main ingredient containing as a main ingredient;
A three-component anchor bolt fixing device comprising an incyanate capsule encapsulated in a base capsule containing polyisocyanate or incyanate prepolymer, and an organic peroxide capsule encapsulated in a base capsule containing an organic peroxide. The present invention has high strength and is made of epoxy resin, acrylic/lY
By adding urethane resin, which is cheaper than T-fat, to polyester resin, which foams by reaction with moisture in damp places, increases volume, and hardens in a short time, it compensates for the shrinkage of polyester when it hardens. Even in the upward hole,
This makes it possible to secure the anchor bolt to the hole wall before any outflow occurs.

Aliphatic tertiary amines used in the present invention include triethanolamine, triethylamine, trimethylamine,
Examples of polyoxyalkylene ether polyols include ethylene diamine, triethylene diamine, and tribenzylamine. Molecular weight obtained by adding dipropylene glycol, glycerin 1, trimethylolpropane, /, J, 4-hexanetriol, pentaerythritol, sorbitol, sorbitan, sucrose, etc.). There are polyether polyols having a value of 00 to about 0.00 to about 0.00. The tertiary amine-added alkylene oxide polyol is obtained by adding the tertiary amine to the above polyol.

The unsaturated polyester resin used in the present invention can be mixed with α, β unsaturated dibasic acids such as maleic anhydride and fumaric acid, or, if necessary, a part thereof with saturated dibasic acids such as phthalic anhydride, isophthalic acid, and terephthalic acid. Styrene is an unsaturated polyester obtained by polycondensing a substance substituted with a basic acid component with a glycol such as ethylene glycol, propylene glycol, dipropylene glycol, dipropylene glycol, or hydrogenated bisphenol A at a molar ratio of about /pair/. , vinyltoluene, chlorostyrene/divinylbenzene, diallyl 7-crate, acrylic esters, methacrylic esters, etc., and a polymerization inhibitor such as hydroquinone is added thereto.

The organic polyisocyanate used in the present invention can be any of those used in the production of ordinary polyurethane, such as various isomers of toluene diisocyanate and mixtures thereof, purified products and crude products of diphenylmethane diisocyanate, etc. From the viewpoint of curing speed, etc., purified or crude diphenylmethane diisocyanate is suitable.

Further, as the incyanate prepolymer, one synthesized from the above-mentioned polyoxyalkylene ether polyol and the above-mentioned polyisocyanate is used.

As the organic peroxide, benzoyl peroxide, Schiff-tetrahexanone peroxide, and tertiary butyl hydroperoxide are used.

In addition to the above, the main ingredient also contains N,N-dimethylaniline and N.
, aromatic tertiary amines such as N-diethylaniline, diethylmetatoluidine, and dimethylparatoluidine, organic tin compounds such as dibutyltin laurate, anti-shrinkage agents such as polyethylene and polystyrene, talc, clay, silica fine powder, alumina 1 Aggregates such as barium sulfate, asbestos fibers, glass powder, and glass fibers, desiccants such as cobalt naphthenate, and others can be blended.

The foaming rate of urethane is preferably 2 to 70%.Next, examples will be shown. Inner diameter 79, depth 1 in concrete
A 30-inch hole was drilled. The main ingredient capsule is a test tube with an inner diameter of 6 mm and a length of 110 mm, and a polyethylene stopper. The diameter was selected so that it would fill up depending on the amount used), and the end was melt-sealed and encapsulated in the main ingredient capsule.

The formulation examples and test results are shown in the table below.

As shown in the following table, the fixing agent according to the present invention has a short gelation time and can provide a large fixing force (pulling force).

Note/) Phthalic acid polyester (vinyl monomer for crosslinking)
3θ% content) Note,! ,) Polyol with tertiary amine (ethylene diamine etc.) added to alkylene oxide Note 3) Polyoxyalkylene ether polyol Note +) Reethanolamine, triethylamine [0. /~S weight note 5) Dimethylaniline 1 diethylaniline [0. /~S parts by weight] Note A) Dibutyltin dilaurate [Incyanate lθ
0 for 0 heavy Yu-bu. / ~ 2 parts by weight] Note 7) Polystyrene, polyethylene [3 to 30 parts by weight per 700 parts by weight of unsaturated polyester] Note g) SO per 700 parts by weight of the main ingredient
~300 parts by weight Note 9) General polyisocyanate (aromatic polyisocyanate) Note 70) After starting the reaction, ? Measured after hours.

Hole (diameter/wa φ x depth/30), bolt (diameter/otsu φ x embedment length 130), capsule material (glass), capsule size (
/ Otsu φ

Claims (1)

[Claims] (1) A main agent containing at least seven types of aliphatic tertiary amines, aliphatic tertiary amines and polyoxyalkylene ether polyols, tertiary amine-added alkylene oxide polyols, and unsaturated polyesters. an inocyanate capsule encapsulated in the base capsule and encapsulating polyisocyanate or incyanate prepolymer; and an organic peroxide capsule encapsulated in the base capsule and encapsulating an organic peroxide. A fixing agent for anchor bolts.