RU2418025C2 - Glue for connection of homogenuous items out of metal, glass, plastic and ceramics - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: glue contains acrylic adhesive Anaterm-105 and additionally it contains varnish F-40 on base of modified phenol-formaldehyde resin and rubber. Glue is produced by mixing adhesive and varnish with addition of hardener for adhesive before utilisation of glue.

EFFECT: upgraded deformation-strength properties of glue connections and reduced cost of glue.

2 dwg, 1 ex

Description

FIELD OF THE INVENTION

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

State of the art

Known adhesive for connecting homogeneous products from metal, glass, plastics and ceramics - acrylic adhesive AN-105.

Acrylic adhesive Anaterm-105 (TU 2257-445-00208947-2005) 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-105 acrylic adhesive is polymerization-capable compounds of the acrylic series - dimethacrylic esters of polyalkylene glycols. The composition also includes inhibitory and initiating systems providing long-term storage of sealant and fast curing in products, thickeners, modifiers, dyes, and other additives [1, 2]. The material is supplied ready for use in polyethylene breathable bottles and has great viability (up to 1 year). The adhesive is a two-component sealant. Component A (base) is red and component B (hardener) is green. After mixing the base (A) and hardener (B), a high-strength material is formed. The viscosity of the material is 2000 ... 2500 MPa * s, the tensile strength at separation is 30 ... 35 MPa. The AN-105 acrylic adhesive is universal and is intended for bonding metal, glass, laminated glass, ceramics and plastics [3].

The disadvantages of glue include:

1) relatively high price;

2) relatively low deformation-strength properties.

Disclosure of invention

A glue for joining uniform products from metal, glass, plastics and ceramics is declared, including the AN-105 acrylic adhesive, characterized in that it additionally contains F-40 varnish, in the following ratio of ingredients (in% by weight):

- acrylic adhesive AN-105 - 85 ... 88;

- varnish F-40 - 12 ... 15.

The basis of the AN-105 acrylic adhesive is polymerization-capable compounds of the acrylic series - dimethacrylic esters of polyalkylene glycols. The composition also includes inhibitory and initiating systems that provide long-term storage of sealant and rapid curing in products, thickeners, modifiers, dyes and other additives. The viscosity of the material is 2000 ... 2500 MPa * s, the tensile strength at separation is 30 ... 35 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) modified phenolic resin - 8 wt.%;

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

3) technical acetone, GOST 2768-84 - 80 wt.% [4].

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-105 adhesive is selected. Then, using the VLA-200M balance, 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 (green hardener) of AN-105 adhesive is added to the resulting mixture, the mixture is thoroughly mixed with 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 0.1 hours. Adhesive joints are cured at a temperature of 20 ° C for 1 hour.

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, therefore, meets the criteria of the invention.

The price of the AN-105 acrylic adhesive (TU 2257-445-00208947-2005) is 8500 rub./kg, F-40 varnish (TU 6-06-246-92) is 410 rub./kg. Accordingly, the price of the inventive glue is 7287 rubles / kg, which is 1213 rubles. or 14% less than the prototype price.

Experimental studies have shown that the strength of the adhesive metal joints made by the inventive adhesive, with a thickness of the adhesive joint of 0.05 mm was 17.1 MPa (average value). This is 36% higher than the strength of adhesive joints made by the prototype adhesive (12.6 MPa). The deformation of the compounds made by the inventive adhesive was 26%, and the prototype 14% (average value). The increase was 86%. 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. An 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-105 varnish F-40, allows to obtain a technical result, which is expressed in: 1) reducing the price of glue; 2) increasing the deformation-strength properties of adhesive joints made by the inventive adhesive.

Brief Description of the Drawings

Figure 1. Sample shafts for adhesive joints with bearing 207.

Figure 2. Centering device for assembling adhesive parts.

The implementation of the invention

A glue for joining uniform products from metal, glass, plastics and ceramics is declared, including the AN-105 acrylic adhesive, characterized in that it additionally contains F-40 varnish, in the following ratio of ingredients (in% by weight):

- acrylic adhesive AN-105 - 85 ... 88;

- varnish F-40 - 12 ... 15.

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 the adhesive AN-105 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 (green hardener) of AN-105 adhesive was added to the resulting mixture, the mixture was thoroughly mixed with wooden with a stick and applied with a “Pony” brush No. 4 to the surfaces to be glued for a period of not more than 0.1 hours

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 R _a 0.63 [5]. 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 (figure 2). Adhesive compounds were cured at a temperature of 20 ° C for 1 h.

Strength studies were performed on a tensile testing machine ИР 5047-50 with simultaneous recording of the load-deformation diagram. 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 16.9 ... 17.3 MPa. This is 34 ... 37% higher than the strength of adhesive joints made with the prototype adhesive (12.6 MPa). The deformation of the compounds made by the inventive adhesive was 25 ... 27%, and the prototype 14%. The increase was 79 ... 92%.

Literature

1. Anaerobic sealing compounds (sealants) [Text]: Acrylic adhesives. Catalog. - Cherkasy, 1988 .-- 22 p.

2. http://www.nicp.ru/

3. Shchetinin, M.V. The restoration of the fixed joints of rolling bearings of agricultural machinery with an adhesive Anaterm-105 [Text]: dis. ... cand. tech. Sciences / Schetinin M.V. - Michurinsk, 2008 .-- 146 p.

4.http: //instplast-kom.ru

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

Claims (1)

Glue for joining homogeneous products from metal, glass, plastics and ceramics, including the AN-105 acrylic adhesive, characterized in that it additionally contains F-40 varnish in the following ratio of ingredients, wt.%:
Acrylic adhesive AN-105 85-88
varnish F-40 12-15

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