SU1070146A1 - Adhesive composition - Google Patents

Abstract

Adhesive compsn. comprises (pts.wt.) an unsatd. polymer soln. in an unsatd. monomer (100), a polymerisation initiator (0.1-8.0) a urethane modifier (2.25-23.5) comprising the reaction prod. of an aromatic diisocyanate with allyl alcohol, and a urethane prepolymer (7.65-76.5). The improvement is that the compsn. also contains a polyorganosiloxane-polyoxyalkylene block copolymer (I) (0.1-3.0) and a fluorinated alcohol (II) (0.5-10) of formula CnH2m+1OH (where n is 3-10). The compsn. is used for repairing ships' structures, fitting and repairing submarine pipelines and other underwater structures. The compsn. improves wetting of the surfaces to be bonded and is partic. suitable for corroded surfaces. It can be modified to meet various requirements, e.g. high moisture conditions, vibrations, corrosion, presence of petroleum prods. or porous substrates. The compsn. hardens within 90-120 mins..

Description

The invention relates to the production of adhesives based on unsaturated polyester resins used, preferably for the repair and installation of underwater pipelines. Adhesive compositions known for the repair and installation of a polyester resin-based oil conduit are known, for example, BAK Sprut glue adhesive. A disadvantage of these adhesive compositions is the deterioration of adhesion properties over time during operation in aggressive media. The closest to the technical essence and we reach the effect to the proposed is the adhesive composition C23, containing, by weight, Unsaturated with ester maleic resin 100 The product of the interaction of allyl alcohol with toluene diisocyanate 2-, 35-23 Polyisocyanate 7,65-76 Block polymerization organoscan, , 1-3, Fluorinated alcohol 0.5-10 Polymerization initiator 0.1-8, This adhesive composition allows to glue metals containing residues of corrosion products on the surface and operating under atmospheric conditions and x periodic wetting. A disadvantage of the known adhesive is that during the operation of glued structures underwater conditions, the adhesion properties of adhesive joints deteriorate over time. In addition, these compounds have insufficient water resistance when gluing metal. The purpose of the invention is to increase the water resistance of adhesive joints. . The aim is achieved in that the adhesive composition comprising an unsaturated polyether maleate resin, a product of the interaction of allyl alcohol with toluene diisocyanate, a polyisocyanate, a block of polyorganosiloxane and polyoxyalkylene copolymer, fluorinated alcohol and a polymerization initiator, also contains a kind of affection and the like. components wearing, mac: unsaturated polyethermaleate resin 100 The product of the interaction of alcohol with toluylene diisocyanate 2, 35-23, Poly Zocyanate 7.65-76.5 Vlr copolymer of polyorganosiloxane and psxioxyalkylene0, 1-3.0 Fluorinated alcohol 0.5-10.0 Polymerization initiator0, 1-8.0 Aerosil, modified (alkyl) polybene, zilpyridinium chloride 1.0-10 As a polymerization initiator, methyl ethyl ketone peroxide, benzoyl peroxide, isopropyl benzene hydroperoxide, etc. can be used, for example. Aerosil (hydrophobic) used in the composition is obtained by modifying aerosil with a 2% solution of alkylpolybenzyl pyridinium chloride (catapine) in ethyl alcohol. In this case, the catapin is taken in an amount of 5% by weight of aerosil. Example. UOO g of unsaturated polyethermaleate resin, 20 g of the product of interaction of allyl alcohol with toluene diisocyanate (product ATZH), 40 g of polyisocyanate 2.5 g of block copolymer of polyorganosiloxane and polyoxyalkylene (CEP-1), 2 g of fluorinated alcohol with carbon atoms of 7.2 g of polymerization initiator, 1 g of hydrophobic aerosil, modified kataping. The mixture is thoroughly mixed, curing the adhesive occurs under the influence of elevated temperature or by adding a polymerization accelerator (cobalt naphthenate, dimethylaniline, etc.). . The table shows the compositions of the known and proposed polymer compositions and their water resistance while keeping glued metal samples in water for 6 months. The results of the tests carried out show that the samples glued together with compounds 1 and 2, after 6 months in water, significantly lose their adhesive strength. The introduction of aerosil modified with catapine contributes to an increase in the strength properties of adhesive joints when they are exposed to water by a factor of 3–4, and this effect is manifested with an increase in the amount of aerosil injected. Thus, the high water-repellent and adhesive properties of the adhesive compositions of the present invention make it possible to increase the reliability of the use of adhesives under water for a long time.

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Prototype

one

2 Offered

3

four

five

6

7

APJ product is the product of the interaction of allyl alcohol with toluene diisocyanate;

RSEP-1 - block copolymer of polyorganosiloxane and polioxyalkylene J PÜK - methyl ethyl ketone peroxide.

Table continuation

Claims (1)

GLUE COMPOSITION, including unsaturated polyether maleate resin, the product of the interaction of allyl alcohol with toluene diisocyanate, a polyisocyanate, a block copolymer of polyorganosiloxane and polyoxyalkylene, a fluorinated alcohol and a polymerization initiator, characterized in that, in order to increase its hydrolysis, it is also acylated and redibloid adhesive in the following ratio of components, parts by weight: Unsaturated Polyester Maleate Resin 100 The product of the interaction of allyl alcohol with toluene diisocyanate 2.35-23.5 Polyisocyanate 7.65-76.5 Polyorganosiloxane and Polyoxyalkylene Block Copolymer Fluorinated Alcohol Polymerization Initiator Aerosil, modified (alkyl) polybenzylpyridine iichloride 0.1-3.0 0.5-10.0 0.1-8.0 1.0-10.0 iU. ,,, 1070146>