RU2635152C1 - Adhesive for connecting homogenuous items out of metal, glass, plastic and ceramics - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: adhesive contains the following components, wt %: acrylic adhesive AN-110 (88-92); varnish F-40 (8-12).

EFFECT: increasing the deformation-strength properties of the adhesive.

2 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of engineering and repair of equipment, in particular to gluing metal, glass, plastics and ceramics in machine components.

State of the art

Known adhesive for connecting homogeneous products from metal, glass, plastics and ceramics - high-strength acrylic adhesive AN-110.

Acrylic adhesive Anaterm-110 (TU 2257-238-00208947-96) is produced by the Federal State Unitary Enterprise “Research Institute of Polymers” (Dzerzhinsk, Nizhny Novgorod Region) and belongs to the category of high-strength sealants. The basis of the AN-110 acrylic adhesive is a polymerization oligomer-polymer mixture. The material is supplied ready for use in polyethylene breathable bottles and have great viability (up to 1 year). The glue is two-component. Component A (base) is red and component B (hardener) is blue. After mixing the base (A) and hardener (B), a high-strength material is formed. The kinematic viscosity of the material is 425 ... 1125 mm ² / s, the tensile strength at axial shear is 20 ... 30 MPa. Acrylic adhesive AN-110 is universal and is designed for bonding metals, glass, fiberglass, ceramics and some styrene-based plastics [1].

The disadvantages of glue include:

1. Relatively high price.

2. Relatively low deformation-strength properties.

When creating the invention, the task was to obtain an adhesive composition, which allows to increase the deformation-strength properties of adhesive joints and lower the cost of glue.

Disclosure of invention

This is achieved by the fact that F-40 varnish is additionally introduced into the glue for joining homogeneous products from metal, glass, plastics and ceramics, including the AN-110 acrylic adhesive, in the following ratio of ingredients (in wt.%):

- acrylic adhesive AN-110 - 88 ... 92;

- varnish F-40 - 8 ... 12.

The basis of the AN-110 acrylic adhesive is a polymerization oligomer-polymer mixture. The kinematic viscosity of the material is 425 ... 1125 mm ² / s, the tensile strength at axial shear is 20 ... 30 MPa.

Varnish F-40 (TU 6-06-246-92) is a solution of a rubber composition and a modified phenolic resin in an organic solvent. Varnish F-40 is a transparent brown liquid without mechanical impurities, characterized by the following indicators:

- mass fraction of solids - 20%;

- bond strength with steel at shear at 20 ° С not less than - 5.0 MPa.

The composition of the varnish F-40:

1) PKU resin (phenol-formaldehyde resin based on substituted phenol of vinylacetylene structure) - 8 wt.%;

2) synthetic rubber nitrile butadiene brand SKN-40C - 12 wt.%;

3) technical acetone, GOST 2768-84 - 80 wt.% [2].

To prepare the composition in a glass container using an analytical balance VLA-200M, the required amount of component A (the base is red) of the AN-110 glue is selected. Then, using the VLA-200M scales, the required amount of F-40 varnish is selected and thoroughly mixed with a wooden stick in a glass container with component A. Before use, component B (hardener - blue) of AN-110 glue is added to the resulting mixture, the mixture is thoroughly mixed wooden stick and apply the composition with a brush “Pony” No. 4 on the glued surfaces of the products for a period of not more than 5 minutes Adhesive compounds cure at a temperature of 20 ° C for 24 hours

An essential distinguishing feature of the prototype is that the adhesive additionally contains varnish F-40.

Thus, the claimed technical solution has significant distinguishing features from the prototype and thereby meets the criteria of the invention.

The price of the AN-110 acrylic glue (TU 2257-238-00208947-96) is 11,000 rubles / kg, the F-40 varnish (TU 6-06-246-92) is 410 rubles / kg. Accordingly, the price of the inventive glue is 9941 rubles / kg, which is 1059 rubles. or 10% less than the prototype price.

Experimental studies have shown that the strength of adhesive metal joints made by the inventive adhesive, with a thickness of the adhesive joint of 0.05 mm was 17.0 MPa (average value). This is 15% higher than the strength of the adhesive joints made by the prototype adhesive (14.8 MPa). The deformation of the compounds made by the inventive glue was 6.34%, and the prototype 4.46% (average value). The increase was 42%. The specific work of fracture characterizes the resistance of the material to cyclic loads. The higher it is, the higher the durability of adhesive joints [3]. For compounds made by the inventive adhesive, it was 23.4 MJ / m ³ , which is 51% higher than that of the prototype (15.5 MJ / m ³ ).

The increase in the deformation-strength properties of adhesive joints made by the claimed composition in comparison with the prototype is due to the fact that the ingredient of the composition is an elastomer - varnish F-40, which contains rubber SKN-40C and resin PKU. The increase in the deformation-strength properties of the composition increases its resistance to shock and cyclic loads and, accordingly, the durability of adhesive joints.

The implementation of the distinctive essential features of the prototype, namely the introduction of additionally in the acrylic adhesive AN-110 varnish F-40 allows to obtain a technical result, which is expressed in reducing the price of glue; increasing the deformation-strength properties of adhesive joints made by the inventive adhesive.

Brief Description of the Drawings

FIG. 1. Model shafts for adhesive joints with bearing 207.

FIG. 2. A centering device for assembling the parts of the adhesive joint.

The implementation of the invention

A glue for joining uniform products from metal, glass, plastics and ceramics is declared, including the AN-110 acrylic adhesive, characterized in that it additionally contains F-40 varnish in the following ratio of ingredients (in wt.%):

- acrylic adhesive AN-110 - 88 ... 92;

varnish F-40 - 8 ... 12.

To prepare the composition in a glass container using an analytical balance VLA-200M with a measurement accuracy of 2 * 10 ^-4 g, the required amount of component A (base - red) of AN-110 glue was selected. Then, using the VLA-200M scales, the required amount of F-40 varnish was selected and thoroughly mixed with a wooden stick in a glass container with component A. Before use, component B (hardener - blue) of AN-110 glue was added to the resulting mixture, thoroughly mixed with wooden with a stick in a glass container with component A. Before use, component B (hardener - blue) of AN-110 glue was added to the resulting mixture, the mixture was thoroughly mixed with a wooden stick and applied with a Pony brush No. 4 to the surface for a period of not more than 5 minutes.

The samples were adhesive joints of the inner rings of bearings 207 with shafts. The shafts were made of steel 45 (Fig. 1). The roughness of the landing surface is Ra 0.63 [4]. The diametrical clearance in the joint prior to gluing was ensured by grinding the shafts. To ensure the alignment of the parts of the adhesive joints used specially designed and manufactured centering devices (Fig. 2). Adhesive compounds were cured at a temperature of 20 ° C for 24 hours

Strength studies were carried out on a tensile testing machine ИР 5082-50 with simultaneous recording of the diagram “load - deformation”. The loading speed during the tests was constant and amounted to 5 mm / min.

Experimental studies have shown that the strength of adhesive joints made by the inventive adhesive, with a thickness of the adhesive joint 0.05 mm was 16.8 ... 17.2 MPa. This is 14 ... 16% higher than the strength of adhesive joints made by the prototype adhesive (14.8 MPa). The deformation of the compounds made by the inventive glue was 6.21 ... 6.56%, and the prototype 4.45%. The increase was 40 ... 47%. The specific work of the destruction of the adhesive joint of the inventive adhesive was 23.2 ... 23.6 MJ / m ³ , which is 50 ... 52% higher than that of the prototype (15.5 MJ / m ³ ).

Information sources

1. http://www.nicp.ru/.

2. http://instplast-kom.ru.

3. Kurchatkin V.V. Restoration of rolling bearings of agricultural machinery with polymer materials. - Dis ... doc. tech. sciences. - M., 1989, - 407 p.

4. Spitsyn, N.A. Rolling bearings [Text]: Reference manual / Spitsyn N.A., Sprishchevsky A.I .; - M.: Mashgiz, 1961, - 828 s.

Claims (2)

Adhesive for joining homogeneous metal, glass, plastic and ceramic products, including AN-110 acrylic adhesive, characterized in that it additionally contains F-40 varnish in the following ratio of ingredients, wt.%:  Acrylic adhesive AN-110 88-92  varnish F-40 8-12

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