SU606864A1 - Adhesive for cementing poly-3,3-bis-(chlormethyl)-oxacyclobutane - Google Patents

Description

FIELD OF THE INVENTION The invention relates to the field of producing adhesives based on chloroprene rubber, used for bonding polyester, poly-3, 3-bis - (chlorometra) oxacyclobutane with metal as well as to each other. Weights: Nayrite-based adhesives, for example, adhesives containing nairite, zinc oxide, magnesia, resin 10 and bromosuccinimide IJ. C-Pei does not provide sufficient strength for gluing pentaplast with metal. The closest in technical essence and the achieved result of the invention is the 88 N glue based on chloroprene rubber, containing, vie.ch .: Na1fit100 Magnesium oxide 69 Zinc oxide .47 (p-tert-butyl Resin 101K-80120 phenol formal dehydrated cm) 80 Benzine-150 Ethyl acetate-ZOO 360 However, the compounds of pentaplast with the metal obtained by using such a tako and also among themselves have a relatively low strength, which significantly limits the possibilities of their use. The purpose and advantage of the invention is to increase the adhesion strength. The goal is achieved in that the adhesive containing chloroprene rubber, magnesium oxide, zinc oxide, P-tert-butylphenol-formaldehyde resin, gasoline and ethyl acetate, additionally contains poly-3,3-bis (chloromethyl) oxacylobutane, tetraethylsilicate and cyclohexanone in the following ratio of components , weight.h .: Chloroprene rubber 100 Oxide magnesium. 6-9 Zinc oxide 4-7 P-tert-Butylphenol-formaldehyde resin 80-120 Gasoline 150-180 Ethyl acetate 300-360 Poly-3,3-bis (chloromethyl) oxy; lobutane 2-5 Cyclohexanone 100-200 Tetraethylsil-ikat 10- 30 Glue is obtained as follows. First, a solution of poly-3,3-bis (chloromethyl) oxacylobutane in cyclohexcaEiOHe is prepared. The dissolution of the pentaplast in cyclohexanone is carried out at SO-CHO C. Then, tetraethylsilicate is dissolved in a weight bearing of 10-30 parts by weight into a cooled one. tetraethyls ha per 100 weight.h. cyclohexanone and the mixture are mixed with components (glue .88}. The following are examples of glue (wt.h.). Composition 1. Chloroprene rubber (nairite) 100 Magnesium oxide 8 Zinc oxide5 c-tert-Butyl Phenol formaldehyde resin 101К100 Yenene 165 Ethyl acetate. Cyclohexane Tetrae nzintetizaty -tert-Butylphenol-formaldehyde resin 101 K120 Gasoline 180 Ethyl acetate360 Pentaplast5 Cyclohexanone200 Tetraethylsilicate32-30 The process of gluing with glue was carried out according to the technology used for the treatment of pentaplast with chloroprene mi.

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Claims (2)

15.8 14.2 14.5 11.4 The first layer of glue is applied to the pre-cleaned and degreased surface of pentaplast and metal and dried for two hours. Then, a second layer of glue is applied, the drying time of which is 4-6 hours. This makes it possible to almost completely remove the residual solvent and thereby improve the quality of the adhesive joint. The surfaces are glued by briefly heating the joint parts (or directly the adhesive layer) up to 120-130 0 and rolling the softening adhesive layer with the pressure roller. The strength properties of pentaplast compounds are presented in the table. As can be seen from the table, the proposed chloroprene glue provides an increased adhesive bond strength, which is very important when lining chemical equipment with sheet polymeric materials. This increases the reliability of operation and increases the service life of equipment protected by sheet pentaplast. Claims for bonding full-3,3-bis (chloromethyl) oxacylobutane containing chloroprene rubber, magnesium oxide, zinc oxide, tert-butyl formaldehyde resin, gasoline and ethyl acetate, characterized in that, in order to increase bonding strength, it additionally contains poly3, 3-bis (chloromethyl) oxacylobutane, tetraethylsilicate and cyclohexanone in the following ratio of components, weight. including: Chloroprene rubber 100 Magnesium oxide 6-9 Zinc oxide - 4-7 I-tert-Butylphenol formaldehyde resin 80-120 Gasoline -150-180 Ethyl acetate, i300-360 Poly-3,3-bis- (chloromethyl) -oxacyclobutane 2 -5 Cyclohexanone 100-200 Tetraethylsilicate 10-30 Sources of information taken into account during the examination: 1. Author's certificate of the USSR 246756, cl. From 03/3/312, 1967, 2. Mulin Yu.A., Yartsev I.K. Pentaplast, Chemistry 1975, pp.81-82.