RU34892U1 - REINFORCING MATERIAL - Google Patents

Abstract

1. Reinforcing material, including a knitted woven or non-woven substrate, coated with a mixture of polyol and isocyanate components as a moisture-curing binder, and a packaging, sealed container. Reinforcing material according to claim 1, characterized in that the substrate consists of natural and / or synthetic and / or glass filaments. Reinforcing material according to claims 1 and 2, characterized in that it further comprises a catalyst and / or stabilizer and / or plasticizer. 4. Reinforcing material according to claims 1 to 3, characterized in that it further comprises pigments and / or dyes. Reinforcing material according to claims 1 to 4, characterized in that it further comprises aromatic compounds. Reinforcing material according to claims 1 to 5, characterized in that it has any standard sizes.

Description

I Illll Hill llrn lirii.,. R

REINFORCING MATERIAL.

The utility model relates to reinforcing self-hardening synthetic materials in contact with air moisture, and can be used for technical purposes for mechanical protection (reinforcing) of cable couplings, electric plugs and hoses, pipelines of various materials, as well as in the field of communications, energy, construction , public utilities and other areas of the national economy.

At present, a material for miring is known, including a mesh base, with an isocyanate crespolymer deposited on it. / 1-5 /. This material allows, without preliminary preparations and additional devices, to form the necessary protective casing directly on the protected part, which has almost any complex configuration, to form. At the same time, it is possible to quickly form a durable durable housing-casing, well repeating the contours of the protected structural element or part. After wrapping the part with tape, the formed protective coating-cure hardens after 15-20 minutes, reacting with air moisture. To accelerate the hardening and faster curing, the surface of the formed protective coating can be rubbed 1 with a damp rag or read this material.

This method of reinforcement compares favorably with the known plastic and metal protective covers, since no preliminary design and manufacture of a large number of covers for different types and sizes of parts is required.

The aim of our development is to create a reinforcing material with elasticity and plasticity in the uncured state, relative to the analogue material, as well as a simplified way to obtain it.

Such a material is obtained by applying to a knitted substrate from natural and / or synthetic and / or glass filaments, in an absolutely dry atmosphere, a mixture of polyol and iso-anionic components, from which an isocyanate prepolymer is already formed on the substrate. In this case, uniform distribution of the mixture of polyol and isocyanate components along the base, and, consequently, the prepolymer, is easily achieved. In the cured state, this protective coating-casing has a high mechanical strength, moisture and acid resistance.

In this case, when preparing the specified composite material, there is no need for a separate preliminary stage for the preparation of the isocyanate prepolymer, the impregnation stage does not require heating the binder or using a solvent followed by its thorough removal, the impregnation process itself is less sensitive to atmospheric moisture. All processes of transportation, storage, transfer from a transport container to a consumable one, if polyol and isocyanate components are used as the initial mixture, are much simpler than the same operations with a viscous and greedy moisture-isosanat prepolymer.

In the claimed material, any knitted, as well as woven or non-woven materials can be used as the basis, depending on the required characteristics of strength, preliminary elasticity, size and other operational requirements.

one or more simple ILIH polyester polyols of molecular weight, medium functionality (the number of hydroxy groups in the polyester molecule);

low molecular weight modifiers, which are used as single or polyhydric alcohols;

As a catalyst that accelerates the reaction of the interaction of isocyanate groups of the resulting prepolymer with water, but does not affect the stability of the prepolymer itself, it may include, for example, amine type catalysts, such as dimorpholinodiethyl ether, bis (2-dimethylamino) diethyl ether in an amount of 0.5 to 5% composition. Alkaline compounds, for example, potassium or sodium carbonates, which are dispersed in the composition in solid form and are activated only in the presence of water, can also be used as a catalyst; defoamers, such as ligneous or cyclic polydimethylsiloxane, for example, PMS-200, in

stabilizers - inorganic acids (phosphoric acid, methanesulfonic acid) or compounds generating hydrogen acids when interacting with water, such as anhydrides and acid chlorides of carboxylic acids, for example, benzoyl chloride, succinic anhydride, etc. in an amount of from 0.01 to 0.1%.

This mixture of components may also contain plasticizers and / or light stabilizers, pigments and / or dyes, as well as various aromatic compounds containing at least two isocyanate groups per molecule and having relatively low volatility. Various modified diphenylmethane are preferably used.

diisocyanates (MDI) or so-called “crude MDI, known as“ polyisocyanate or PID and other additives.

When applied to a mesh base, the polyol asocyanate components are mixed in a ratio of 1: 1 to 1: 2.5.

A knitted substrate coated with a mixture of components in the form of a roll on a plastic spool is packaged in a sealed, moisture-proof container.

When working with this material, protective plastic or rubber gloves are worn on the hands due to the very high adhesion it is bonded to; it can be applied to any surfaces, including the skin of the hands; then the package is opened and proceed to winding the roll on the object of protection with 30-50% overlapping layers of material. To obtain the proper reinforcing effect, at least 2 layers of material are wound. If necessary, immediately after winding the moisture-curing material to obtain a glassy, glossy surface, wipe it with a damp rag and wind any plastic film over the resulting casing for 15-20 minutes. After 20 minutes, the casing hardens, and after 4-6 hours, it gains the required mechanical strength.

EXAMPLE OF SPECIFIC APPLICATION.

Knitted tape 10 cm wide of polyester, elastic in the longitudinal and transverse directions, weighing 130 g / m, is dried in a vacuum to a residual moisture content of not more than 0.2%. The tape is placed in a special chamber where they maintain a constantly dry atmosphere (dew point not higher than 25 ° C). Then a mixture is applied to the tape using a bath and rollers

polyol and isocyanate components. The polyol component consists of the following products;

Polyoxypropylene diol (molecular weight 1000) 67.78

Polyoxypropylene triol (molecular weight 500) 28

Dimorpholinodiethyl ether3

PMS 2000.02

Benzoyl chloride 0.2

Soot 1.0

The isocyanate component in this example is Bayer Desmodur 44V20 polyisocyanate.

To prepare the mixture, 100 parts of the isocyanate component are taken per 100 parts of the polyol as one component. The amount of mixture used for impregnation is 450 g / m.

A piece of tape with a length of 1.5 m uniformly impregnated with the specified mixture is wound on pshulu, placed in a bag of aluminum foil laminated on the inside with polyethylene and with an outer lavsan. The bag is carefully sealed by hot soldering of the inner polyethylene layer.

The manufacture of a reinforcing coating on cable couplings includes the simple winding of the proposed material over the surface of the coupling, its bends and a cable suitable for them, followed by self-curing with moisture contained in the air. The resulting protective casing protects the coupling and cable entry points from mechanical damage, unnecessary bending, stretching and provides the required rigidity of the entire “cable-to-coupling design without the use of a metal or steel frame.

Claims (6)

1. Reinforcing material, including a knitted woven or non-woven substrate, coated with a mixture of polyol and isocyanate components as a moisture-curing binder, and a packaging, sealed container. 2. Reinforcing material according to claim 1, characterized in that the substrate consists of natural and / or synthetic and / or glass filaments. 3. Reinforcing material according to claims 1 and 2, characterized in that it further comprises a catalyst and / or stabilizer and / or plasticizer. 4. Reinforcing material according to claims 1 to 3, characterized in that it further comprises pigments and / or dyes. 5. Reinforcing material according to claims 1 to 4, characterized in that it further comprises aromatic compounds. 6. Reinforcing material according to claims 1-5, characterized in that it has any standard sizes.