SU910715A1 - Adhesive composition for securing rubbers based on polarized rubbers - Google Patents

Description

 . 1 The invention relates to adhesive compositions, is intended to fasten rubber from rubber of medium and high polarity with each other and with metals in the process of vulcanization at low pressing pressures and can be used in the industrial rubber goods industry and other industries that manufacture braid, other rubber parts with metal fittings, as well as multi-layer rubber structures, such as gum linings. Known adhesive compositions based on 2,3-Dichlororbutadiene 1,3 ItJ, based on chlorinated natural rubber, epoxy novolac resin, amines 2. Leukonat glue is known, which is a solution of p, p, p - triphenyl methane triisocyanate in dichloroethane GZ. The adhesive is intended for hot fixing of rubber, in the process of vulcanization at high pressures (up to 10-15 MPa). Glue is toxic and requires considerable complication of technology when using it. The closest in technical essence and purpose to the invention is an adhesive based on chloroprene rubber, which also contains burnt magnesia (7 parts per hour of UOmasm. Rubber)) zinc oxide (3.0 parts by weight); rosin (May 5.0 h.); altax (May 0.25 hr); diphenylguanidine (0.1 May. h); May carbon black. h) in a solution of ethyl acetate and gasoline in the ratio of 1: 1 4. However, the strength of attachment of the coating rubber between itself and to the metalloop-L letke is not high enough and does not exceed 1.5-2.0 kn / m. In addition, the use of the tH-8 glue provides for at least 2–3 smears, which significantly complicates the process. The purpose of the invention is to increase the strength of attachment.

The composition, including chlorinated rubber and solvent, contains chlorinated and, in addition, nitrile butadiene nitrile rubber, phenol-formaldehyde resin, acid condensation, hexamethylenetetramine, ethylenebysisopropylxanthate, and dibutyl phthalate, which is also used for chlorinated rubber, and has a ratio of 201%; , 0 Chlornaite Phenolformalde-, acidic acid hydride resin:: 0.75-3.5% Hexamethylenetetra0, 2 Ethylene bisispropyl xanthate 0.005-0.5 Dibutyl phthalate 0.03-1.5 Solvent 2.0-33 Prev The adhesive composition can also contain p-tert-butylphenol-formaldehyde resin of alkaline condensation (resin 101 TU 6 10-12b1-80) in the amount of 1.0 3 May. h to increase strength

bonding an adhesive film with rubber; P-di- 30 tests:

nitrosobenzene as a vulcanizing agent to increase the cohesive strength of the adhesive in the amount of 0.010, 02 May. h

The composition uses phenol-35 formaldehyde acid condensation resin containing 5.0 May. including hexamethylenetetramine (PFP0116, OST 6-05- t1-78).

The adhesive composition is applied to metallic reinforcement, for example, a metal braid and, in the case of anchoring rubber between them, to both surfaces being glued, dried, brought into contact and vulcanized according to the mode 45 inherent in the vulcanization process of the rubber mixtures used.

The invention is illustrated in examples 1-32, examples 2-5 reflect control experiments (see Table 1). 50

Example 1. To a solution of chlorine erythite, SPP 0116 resin, ethylene bis isopropyl xanthate and dibutyl phthalate in a ratio of 1.3: 2.7: 0.3: 1.0, respectively, in ethyl acetate, under continuous stirring, are added

Particulate mixture in the amount of 1.0 mach. based on rubber. After thorough mixing and dilution with ethyl acetate to a concentration of 33, the resulting adhesive composition is coated with the metal braid of the high pressure hose at 16x29. After short-term drying the metal braid smeared 15 20 25

Fastening strength (GOST 6286-73), kN / m Indicator fluffing (GOST 6286-73), mm Bonding strength of rubber with metal during peeling (GOST 211-69), kN / m Delamination resistance (GOST 6768-75), kN / m

All the following examples are given in Table 1.

Properties of adhesive compositions are given in table. 2.:

From Table 1, it follows that the use of the proposed composition for fastening rubber based on rubber of medium and high polarity among themselves and to metals, for example, to a metal braid in sleeves and other metal-reinforced products during vulcanization at low pressing pressures (up to 1.0 MPa), allows to significantly reduce the rate of fluffiness of the metal braid after removing the cover rubber, to increase the bond strength between themselves and to metals. glue, cover the cover rubber. a mixture on the basis of SKN-18 and CP-50 rubbers (Nairit), vicelled and vulcanized in a boiler at 30 minutes. The metal plate is also reduced to a half in the boiler adhesive composition, a rubber mixture based on SKN-18 and CP-50 is applied, placed in a mold and vulcanized. When gluing rubber on the basis of SKN-26 and a combination of SKN-18 with SR-50, both glued surfaces are coated with glue, put on each other, placed in clamps and vulcanized in a boiler at 30 minutes. It should also be noted that positive results can also be obtained when performing vulcanization without pressure. The obtained samples were subjected to

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Claims (3)

910715 Table 2 Formula 1 of the invention. An adhesive composition for fastening rubber based on polar rubbers, including chlorinated rubber and a solvent, in order to increase the strength of the fastener, it contains chlornaite and, additionally, butadiene nitrile as chlorinated rubber. Rubber, phenol-formaldehyde acid condensation resin, hexamethylenetetramine, ethylene bisisopropyl xanthate and dibutyl phthalate in the following ratio of components, May. h .: Butadiene nitrile rubber1 Chlornairite 0.15-2.0 Feiol formaldehyde resin of acid condensation О ,, 5 Hexamethylene tetramine 0, 0 "-0.2 Ethylene bisisopropyl xanthogenate 0.005-0.5 Dibutyl phthalate 0.03-1.5 Solution 2,0-35 2. A composition according to claim 1, characterized in that, in order to increase the bond strength with rubber, it additionally contains p-tert-butylphenol-formaldehyde resin in an amount of 1-3 May. part 3. The composition according to claim 1, characterized in that, in order to increase the cohesive strength, it additionally contains p-dinitroso-enzole in an amount of 0.01-0.02 May. h 591071516 Sources of information, 2. US patent number 3099b32, taken into account in the examination of cells. 260-3.3, pub. 19631. US Patent N ° 2581920, adhesives. M., Himi, 1976, with 181. to it28-t 62, pub. 1952.k. Ibid, s, 276-277 (prototype) 3. Kardashov D.A. Synthetic