Gluing composition

FIELD: glues, rubber industry.

SUBSTANCE: invention relates to chloroprene rubber-base gluing composition. The gluing composition comprises polychloroprene rubber Nairit DP, butylphenolformaldehyde resin 101K, water, zinc oxide, magnesium oxide, organic solvent representing a mixture of ethyl acetate and nefras and comprises methacrylic acid glycide ester as a modifying agent and vat waste in aniline manufacturing with the content of aniline 15-18 mas. p. p. Proposed gluing composition provides the enhanced strength in gluing. Invention can be used in rubber industry in gluing vulcanized rubber.

EFFECT: improved and valuable technical properties of composition.

2 tbl

 

The invention relates to adhesive compositions based on polychloroprene rubber and can be used in the rubber industry for bonding vulcanized rubber between itself and its attachment to the metal surface.

Known adhesive composition comprising a chloroprene rubber, thiuram, zinc oxide, as the resin product of co-condensation of phenol acetaldehyde and acetonaphthone and the solvent (USSR Author's certificate No. 1579920, CL 09 J 111/00; publ. 23.07.90). As solvent a mixture of ethyl acetate and petrol.

However, this adhesive composition does not provide a sufficiently high strength for bonding articles of vulcanized rubber.

Known adhesive composition comprising polychloroprene rubber, epoxy resin, low molecular weight on BNR rubber, tertiary amine, and a solvent (USSR Author's certificate No. 685673, CL 08 L 11/00; publ. 15.09.79).

However, this adhesive composition has a low strength bonding of rubber products based on various rubbers.

Known adhesive composition comprising polychloroprene rubber, butylbenzaldehyde resin, a copolymer of styrene and piperylene, rosin, esterified with glycerol; pine rosin, diphenylguanidine, 2,2-dimensionalised, zinc oxide, magnesium oxide, EO is anceschi solvent (U.S. Pat. Russia 2028358, MKI609 J 111/00; publ. 09.02.95).

However, this adhesive composition, although it has a similar composition, used to glue products from ferrites.

Closest to the invention to the technical essence is the glue SU (TU 381051760-89), which includes (wt. PM): polychloroprene rubber Nairit DP - 90, butylbenzaldehyde resin 101 K - 90, zinc oxide, 5 - magnesium oxide - 11, water - 3, and an organic solvent - 800. As solvent a mixture of nefras and ethyl acetate in a percentage ratio of 50:50.

However, this adhesive composition (although it is widely used because of its low cost) does not provide a sufficiently high strength for bonding vulcanized rubber (to achieve the shear strength for bonding vulcanized rubber based on SKI-3 does not exceed a 10.2 kgf/cm2).

The objective of the invention is to provide a composition of the adhesive composition having increased strength in bonding vulcanized rubber between them.

The technical result is to increase the strength of the bonding vulcanized rubber between them.

The technical result is achieved in that the adhesive composition comprising polychloroprene rubber Nairit DP, butylbenzaldehyde resin 101 To, zinc oxide, magnesium oxide, water, and the solvent content of inorganic fillers, representing a mixture of ethyl acetate and nefras as modifier contains glycidyl methacrylic acid (GMAC) and distillation waste from the production of aniline (KPA) with the content of aniline 15-18 parts by weight, in the following ratio, wt. hours: polychloroprene rubber Nairit DP 90, butylbenzaldehyde resin 101 K - 90, zinc oxide, 5 - magnesium oxide - 11, water - 3, a specified organic solvent - 800, glycidyl methacrylic acid - 14,0-2,5, distillation waste from the production of aniline -10,0 in 1.5.

Polychloroprene rubber Nairit DP is the main film-forming adhesives-solutions.

Butylbenzaldehyde resin 101 TO (TU-60004691277193-97).

Curing group: zinc oxide (zinc white GOST 202-84), magnesium oxide (burnt magnesia GOST 844-79) was previously used in the adhesive compositions (Kardashov D.A., Petrov A.V. Polymer adhesives. M.: Chemistry, 1983).

Organic solvent: a mixture of ethyl acetate grades a, B (GOST 8981-78) and nefras (GOST 3840167109-92).

The modifier is a cheap material, KPA are waste resulting from the production of aniline (TR production of aniline CJSC "Orgsintez" , Volzhsky). KPA represent (parts by weight): aniline 15-18, cyclohexylamin - 0-10, toluidine (solvent) - 2-4, sodium hydroxide (filler) - 1-3, diphenylamine-3-20, metaphenylenediamine - 1-3, o-,n-aminophenol - 1-6, highly Molekulyarnye resinous substances (reagents, interacting with rubber) - 6 : 45 a.m. GMAC (TU 6-09-15-350-78) is used in the paint industry. As a result of interaction of GMAC and KPA is the increase in the concentration of polar groups and the formation of additional chemical bonds in the interaction of aminecontaining modifier with movable allylic chlorine atoms in macromolecules chloroprene rubber, which contributes to the strength for bonding vulcanized rubber between them.

The adhesive composition is prepared as follows.

In the beginning prepare a rubber compound S-1-GN - a mixture of plant APS, magnesium oxide, zinc oxide (ETP 8857-91) in the rubber mixer for 10 minutes, the temperature of the mixer gradually increases as you enter the components of the mixture) from the 50°C to 85°C. After discharging the mixture at a temperature of 105°To carry out listomania for 5 minutes Then heated rubber mixture with part of the solvent (about 0.1 h from the total amount of solvent) is clearesult. Remaining solvent together with other ingredients of the adhesive composition butylbenzaldehyde resin, water, GMAC, KPA load portions in clearesult as swelling rubber compound. Total time clemmesen is 4.5-5 hours, with the introduction of GMAC and KPA can be carried out after cooked what I adhesive compositions based on other components.

An example of the preparation of the adhesive composition. In clearesult containing prepared in a known manner naritaweg glue SU (TU 381051760-87), comprising polychloroprene rubber Nairit DP, butylbenzaldehyde resin 101 To, zinc oxide, magnesium oxide, water and an organic solvent, enter the calculated amount of modifier in the mass ratio GMAC:KPA (50 to 70): (30-50) and stirred the contents for 5-10 minutes until a homogeneous mass.

Receive adhesive compositions 1-9, the compositions of which are shown in table 1. The adhesive is a light-brown liquid. Adhesive tech, well-applied to the surface of rubber and metal. Have been investigated by various ratios of GMAC:KPA (table 2).

The stated limits of the components included in the composition of the modifier GMAC 14,0-2,5; KPA 10.0 to-1,5, due to the fact that when you increase or decrease the indicated dosages bond strength when bonding is reduced.

It is established that the optimal mass ratio between GMAC and KPA is 60:40, with the introduction which provided the best results. Comparative tests of strength properties of adhesives in all variants of the claimed composition and the prototype for bonding vulcanized rubber based on SKI-3 and the qualified electronic signature certificate are given in table 2. For comparative tests, you need a kitchen is Leno 9 variants of the compositions (by the way, described in the example and the composition of the prototype presented in table 1.

The proposed composition was studied on the adhesion strength shear achieved through keeping under load of 2 kg at room temperature (20° (C) within 24 hours. The data presented in table 2, which shows that best results are obtained when using the compositions 5 and 6.

We offer adhesive composition provides an increase in strength properties of adhesive joints in comparison with the prototype. Thus, the strength of the glue line shear bonding vulcanized rubber based on SKI-3 prototype is 10.2 kgf/cm2and with the use of the modifier of 14.3 kgf/cm2.

Adhesion shear was determined on a tensile testing machine MPC - 250 (RTM 1.2.126-88). Technology pasting the following samples. One-time application of the prepared adhesive to the prepared surface, drying the adhesive film at room temperature (20°C)drying the adhesive film for 5 minutes, after which he made a tight pressing of the bonding surfaces.

Thus, as can be seen from table 2, when combined in the proposed adhesive compositions of GMAC and KPA in the specified proportions can improve the strength of bonding of the articles of vulcanised rubber other on the basis of different the rubbers, due to the participation of this modifier in improving the adhesion properties of the adhesive.

We found that the reason for increasing the adhesion performance of the adhesive is not only an increase in the concentration of the polar groups with the introduction of the modifier, but the formation of additional chemical bonds in the interaction of aminecontaining modifier with movable allylic chlorine atoms in macromolecules chloroprene rubber, which leads to an increase of the density of a spatial grid and, apparently, to the hardening of the adhesive film.

Table 1
ComponentThe content of the component masses. o'clock, in the composition
123456789the placeholder
Polychloroprene rubber Nairit DP9090909090909090 9090
Butylbenzaldehyde resin 10190909090909090909090
Water3333333333
Zinc oxide5555555555
Magnesium oxide11111111111111111111
The organic solvent (a mixture of ethyl acetate and nefras in percentage the ratio of the attachment 50:50) 800800800800800800800800800800
GMAC3,57,014,03,06,0to 12.02,55,010,0-
KPA1,53,06,02,04,08,02,55,010,0-
Table 2
The ratio of GMAC:KPA, massThe indicator for the composition
70:3060:4050:50The prototype SA
Load shear (kgf/cm212 3456789
SKI-312,3a 12.712,412,313,614,312,312,512,310,2
Qualified electronic signature certificate13,213,313,711,817,413,611,913,115,111,7

Technical and economic effect, resulting from the application of the adhesive compositions is that its use can significantly improve the quality fastening products, of vulcanised rubber other on the basis of different rubbers to improve the technological parameters of the bonding process. In addition, its use allows the use of by-product (waste) petrochemical production (aniline).

The adhesive composition comprising polychloroprene rubber Nairit DP, butylbenzaldehyde with the Olu 101, water, zinc oxide, magnesium oxide, organic solvent which is a mixture of ethyl acetate and nefras, characterized in that it further comprises as a modifier glycidyloxy methacrylic acid and distillation waste from the production of aniline, aniline content 15-18 parts by weight, in the following ratio of components, parts by weight:

Polychloroprene rubber Nairit DP90
Butylbenzaldehyde resin 10190
Water3
Zinc oxide5
Magnesium oxide11
Specified organic solvent800
Glycidyloxy methacrylic acid14,0-2,5
Distillation waste from the production of aniline10,0-1,5



 

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