SU922129A1 - Adhesive composition for gluing concrete structures - Google Patents

Description

(H) ADHESIVE COMPOSITION FOR GLUING CONCRETE

CONSTRUCTIONS

I

The invention relates to the field of polymeric building materials used to glue predominantly concrete and reinforced concrete structures at low negative temperatures.

A composite is also known, which includes an unsaturated polyester resin, a polymerization initiator, crushed stone, sand, fine-dispersed filler, pigment and oligoaryloisocyanate with a content of 23-29% isocyanate groups HtC6H9 (NCO) CH, llnCbH4NCO PZ. n 1-.

However, this composition is cured at a temperature not lower, not cured on a wet surface ..

A known adhesive composition comprising oligomethyl acrylate, methyl methacrylate, isopropyl benzene hydroperoxide, cobalt naphthenate, polyethylene polyamine, styrene copolymer, butadiene and acrylonitrile copolymer, cement and quartz sand 23.

The composition can be cured at low temperatures.

However, the bonding strength of the composition is insufficient.

The closest in technical essence and the obtained result to the Proposed is a glue composition, including, wt.%: Unsaturated polyether ester resin, methyl methacrylate hydroperoxide

10 isopropylbenzene 0,, 9, styrene solution of cobalt naphthenate 1.1-1.3 polyethylene polyamine 0.16-0.18 and filler - crment 18-20 and quartz sand the rest 3.

15

However, the known composition requires a long curing time at low temperatures and does not provide sufficient strength.

The purpose of the invention is to increase the strength and decrease the curing time at low temperatures.

The goal of the invention is achieved in that the adhesive composition for gluing concrete structures, including an unsaturated polyethermaleate resin, a styrene solution of cobalt naphthenate, isopropyl benzene hydroperoxide, an amine and a filler, contains dialkylaniline, as a filling agent, a diabase, and an additive and an additive. with the content of 22-30 NCO groups in the following ratio of components, weight .:, Unsaturated poly-. ether maleate resin 27.1-28.5 Pris-isocyanate 11, -16.1 Hydroperoxide. isopropylbenzene 0.8-1.1, Styrene cobalt naphthenate solution 1.6-1.7 Dialkylaniline 0.1-0.2 DiabazOstal The composition uses a compound accelerator: a mixture of cobalt naphthenate and dialkylaniline. Due to the introduction of a complex accelerator, a la

Amount components, weight ..

Components

28.5 27.7 27,128,527,727.1

11, 13.8 16.111, 816.1

1,1 1,1 1,11,11,1 1,1

0.1 0.1 0.1 - 1, 7 1.7 1.6 1.7 1.7 1.7

57.2 55.6 5,057,255,65,0

The technology of preparation of the developed adhesive composition includes

-0,1.0,1 0,1

the following operations: dosing of components, preliminary mixing-like process of formation of metastable complexes with their subsequent decomposition into free radicals. The fast process of disintegration of metastable complexes is accompanied by a significant release of energy, exceeding the activation porbg, which causes curing of the glue at a negative temperature. The amount of energy released during the decomposition of metastable complexes, and hence the rate of solidification of the composition, can be regulated both by the ratio of the initial components in the complex co-accelerator and its total content in the composition. This makes it possible to adjust the curing time depending on the ambient temperature and the temperature of the glued structures. The increased content of isocyanate groups in the composition also creates conditions for curing on wet surfaces of the adhered products. Examples of compositions of adhesive compositions are given in table. 1. Table

of a tertiary aromatic amine (dialkylaniline) with styrene solution of naphthenic acid salt and metal of variable valence i, the introduction of an initiator into an unsaturated polyethermaleate resin, the combination of iso-. cyanate compound with a mixture of unsaturated polyester resin and ini800 820 850 800 820 810 1UO 100

105 НО 120 105 Adhesion to dry concrete, kgf / cm Higher strength beta Adhesion to wet concrete, kgf / cm Higher strength without Adhesion to steelj kgf / cm60 65 Curing time in minutes at. temperaHak follows from the table. 2, the proposed composition has increased strength and reduced time from awry at negative temperatures.

The adhesive composition is technologically feasible, which allows the components listed above to be used to create a mixture packaged to two components, which excludes many technological operations on the construction site.

introduction of a finely dispersed filler (diabase), careful movement of the components, the introduction of complexd with an accelerator.

The main physicomechanical properties of the developed adhesive composition are presented in Table. 2

table 2

110

20

The application of the proposed adhesive composition will make it possible to obtain a large economic effect, due to a considerable reduction in the cost of glue and a reduction in the cost of preparing structures for bonding, such as drying.

Claims (3)

Invention Formula Adhesive composition for gluing concrete structures, including concrete fragility Above the strength of concrete 792212 saturated polyethermalmate resin, styrene solution of cobalt naphthenate, isopropylbenzene hydroperoxide, amine and filler, so that, in order to increase s strength and cViMmeHM we, we will maintain the same. it contains dialkylaniline as an amine, diabase as a filler and additionally polyisocyanate O with a content of 22-30 NCO groups with the following ratio of components, weight Unsaturated polyether ether acetate 15 resin, 27.1-28.5 Polyisocyanate11, 98 Isopropyl benzene hydroperoxide, 8-1.3 Styrene solution of cobalt naphthenate1, 6-1.7 Dialkilanilin0,1-0,2 DiabazEstalnaya Information sources taken into account during the examination 1. USSR Author's certificate No. 566795., cl. S O B 25/02, 1976. 2. USSR author's certificate n ° application N 2812232/05, cl. From 09 3 3/1. 3. USSR author's certificate in application number 2678256/05, cl. C 09 3 3/1. (Prototype).