SU514494A1 - Glue - Google Patents

Description

(54) GLUE

You will relate to the area of producing acrylate-based adhesives used for bonding surfaces in air to underwater.

The adhesive is known for gluing dry and wet surfaces, containing polybutyl methacrylate, methyl methacrylate, a surfactant — a product of the interaction of allyl alcohol with toluene diisocyanate, and a polymerization initiator.

However, the glue does not provide sufficient strength for gluing under the water surfaces coated with oil, oil or other low polar liquids, as well as gluing in the medium of these fluids.

In order to provide the possibility of obtaining durable adhesive joints when gluing in air and under water surfaces coated with hydrocarbon and other liquids of low energy, as well as scooping in these fluids, fluorinated alcohol C.F2 is introduced into the glue. Oil, where n 5 - 15, entering into

Hy: l-shche: k .... interaction with the base of glue and product alcohol / d-ect and alcohol with toluHJieHAtiii; iOAiHa .iiioM (АТЖ).

TexriOjii / ri-LA glue preparation is as follows.

Inert gas at room temperature in methyl methacrylate dissolve iron half-butyl methacrylate. After complete dissolution of the polymethacrylate, fluorinated alcohol is introduced into the solution. Before using the composition with it, the product interacts with allyl alcohol with TO.Tiyyl diisocyanate (LTG) and initiate the system-. for example, benzene peroxide and dime1; l; -limer.

The ratio of methyl methacrylate - half-butyl methacrylate (PBMA) is determined by the strength of the adhesive compound (maximum strength is achieved at an MMA-PBML ratio of 1: 0.8) by the cured adhesive module (with a fine PBMA elastic modulus decreases) and the viscosity of the adhesive.

The minimum possible content of fluorinated alcohol (PS) in the composition varies depending on the length of the fluorinated tail in the alcohol molecule. With an increase in the length of the tail, the surface activity of this coeAiiHemia increases and, consequently, its content in the composition is reduced. Excessive consumption of FS in the composition (up to 10 parts by weight CL 100 weight.h

Claims (3)

basis) does not lead to deterioration of its properties. A filler is allowed to be added to the composition — ground quartz, alabaster, titanium dioxide, chromium oxide, alumina, and others. The water resistance of the filled glue is lower than that of the non-filled glue, therefore, if it is necessary to use the glue joint in water, the filler is not inserted into the glue. Before bonding, the APJ and the initiating system are introduced into the glue base. After mixing the composition, it is ready for use. Gluing techniques vary with gluing conditions. Bonding can be carried out both in air and in the environment of water, oil, machine oil, gasoline and other hydrocarbons. The glue can be applied to the surfaces of the products to be glued in the air and connected to them in a liquid medium, or it can also be applied directly in a liquid medium. It is allowed to apply both to one and to both glued surfaces. Pressure when gluing contact. When used as an initiating system, the pair re-example 2. Composition of glue, parts: Methyl methacrylate Polybutyl methacrylate Fluorinated alcohol () 2 Benzoyl peroxide 1 Dimethylaniline 0.5 Composition viscosity according to Heppler at 20 ° С 40 П; The shear strength (kg / cm) when gluing the samples at 20 ° C is: steel 340, aluminum 310, fiberglass 160-250 (fiberglass laminate), silicate glass (glass fracture). Tests were carried out one month after gluing. When gluing samples from St 3 to oil, shear strength is 320 kg / cm. PRI me R 3. The adhesive of example 2, which added 50 weight.h. ground quartz on 100 weight.h. glue The shear strength of specimens from St 3 in a month after gluing is 320 kg / cm. Glue can be used, for example, when Kis benzoyl-dimethylaniline can be bonded at temperatures from –5 to 40 ° C. Water resistance and gas oil resistant is high. The strength of adhesive joints does not decrease after the use of the compounds in water or in the medium of oil products during a year. Example 1. Composition of glue, parts: Methyl methacrylate 100 According to 1 shbutyl methacrylate160 ATZh20 Fluorinated alcohol (QFjiOH) 4 Benzoyl peroxide1 Dimethylaniline 0.5 Viscosity of the composition according to Heppler at 20 ° С -50 P. Viscosity at OT-4 at 20 ° С 75 s, viability at 20 ° С I hour. The limits of strength (kg / cm) with a uniform top steel fungi, glued and latching in various environments are shown in the table. gluing oily surfaces in air and under water (repair of oil tanks, underwater petroleum products and other subsea structures), in hydrocarbons, and also as a protective coating applied by the supply or in wet conditions. Claims of the invention Slate containing polybutyl methacrylate, methyl methacrylate, the product of the interaction of allnl alcohol with toluene diisocyanate (1 mol / 1 mol), the initiator and catalyst of polymerization, which is the fact that, in order to ensure the possibility of obtaining durable glue seams when gluing on the air suspension and underlay surfaces covered with hydrocarbons and other low-energy fluids, as well as gluing in the medium of these liquids, fluorinated alcohol Cpp2p + jOH, where n 5-15, in the following ratio of components, parts by weight, is introduced into the glue. : Meshmetacrylate100 Polybutylmethacrylate20-200 The product of the interaction of 5 allyl alcohol with toluene diisocyanate (1 mol / 1 mol) 10-60 514494 6 Fluorinated alcohol1 Polymerization initiator 0.1-3 Polymerization catalyst 0.05-1