SU899595A1 - Polymeric composition - Google Patents

Description

(5) POLYNER.COMPOSITION

The invention relates to the chemical industry, namely, the composition of compositions based on oligo ether acrylates (OEL) or a mixture with vinyl chloride (PVC) or copolymers of vinyl chloride (VC), and can be used to coat any material (metal, wood, plastic) on the surface. , ceramics, etc.) in order to protect it from exposure to aggressive media (organic solvents, acids, alkalis), including at elevated temperatures, without prior treatment of the material with an adhesive. Known polymer composition, soda | cloth, wt%: paste-forming PVC 15-85, polymerizing organic compound 0.1-80 {plasticizer 0-50j initiator 0-8; 0.01-4 stabilizer and 0-50 filler. Bisallylcarbonate triethylene glycol, triallyl phosphate, triallyl silicate and diacrylate triethylene glycol are used as polymerizing compound. This composition is used to overlap steel plates. The adhesive strength of the adhesive is greater than 56 kg / cm I.t3. The disadvantage of this composition is the low physical and mechanical properties of the polymer material. Closest to the invention in its technical essence and the effect achieved is a polymer composition containing, in parts by weight: homo- or copolymer BX 5-l8i OEA 55-30; lead stabilizer of 0.2-0.5 and a polymerization initiator of 0.5-1.3. Triethylamine glycolt, l) -dimethacrylate (TGM-3), ° C, 1-methacryl- (bis-triethylene glycol) 5 talate (MGF-E) iOC, and methacrylate- (bisethylene glycol) phthalate {MGF-1) are used as OEA. This composition is intended to combine sheets, profiles, pipes, and other products made from (co) polymer-oligomeric compositions. 3 The cured adhesive composition (adhesive joint) is characterized by increased heat resistance (117-138 ° C) chemical resistance, increased tensile strength (kgf / s), etc., properties 2. However, the adhesive strength of coatings to the protected surface, which is determined by the breaking stress at tearing is insufficient. The purpose of the invention is to improve the adhesion strength of coatings on its base, while maintaining high heat and chemical resistance. This goal is achieved by the fact that a polymer composition for coatings containing a homo- or copolymer of BX, an oligoacrylate, a lead stabilizer, and a polymerization initiator contain, as an oligoacrylate, C-trimethacryl. (bis-pentaerythritol) adipate (7-1) or its mixture with an oligoether acrylate selected from the group including triethylene glycol-N / -dimethacrylate (TGM-3), -metacryl- (bis-triethyl glycol) phthalate (11GF-9) - / o Cd-methacrylate (bis-diethylene glycol) phthalate (MDF-1 iOC, -methacryl- (bis-ethylene glycol) phthalate (MGF-1), in the following ratio of components, wt.::HH or copolymer BXO-itO Oligoether acrylate or a mixture of oligoether acrylates 60-90 Lead stabilizer 0, 15-3.0 Polymerization initiator O, 6-2, O Copolymers BX with methyl acrylate MA-3 and MA-20 are used as copolymers (soda Neighboring methyl acrylate 3 and 20 wt.%, respectively) with BA-5, BA-10 and BA-15 vinyl acetate (vinyl acetate content 5.10 and 15 masD, respectively). The stabilizer is a mixture of dibasic lead stearate and tribasic lead sulfate (1 : 1). Polymerization initiator -dicyclohexyl peroxydicarbonate (DTGH), benzoyl peroxide, etc. Example 1. 10 wt.h.p. PVC K-70 and 0.15 wt.h.ch. salts of lead are mixed with 10 parts of the product 7-1 into a paste at room temperature on a small spray gun. The resulting paste is evenly distributed in a mixing tank, equipped with a stirrer, in 80 mas.w. of product 7-1, and 0.6 mas.h. previously dissolved in it. dicyclohexyl peroxide dicarbonate. The mixture is sprayed onto a metal surface with a spray gun. The polymer coating is heated with hot air (100–200 ° C) for several minutes. The adhesive strength of the polymer coating is determined according to GOST 1J760-69. The heat resistance of the polymer coating is 130 ° C by Vic. The polymer coating has a chemical resistance to organic solvents and hot water. Examples Compositions were prepared as described in Example 1. The table below shows the compositions of the compositions and the adhesive strength values of polymeric coatings, which are characterized by breaking stress at separation.

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Claims (2)

As it can be seen from the table, the proposed composition is characterized by increased adhesive strength, as compared with the known composition, it increases from 37-67 to 101-156 kgf / cm. At the same time, it is characterized by good heat resistance (according to Vic 125-t30C) chemical resistance to organic solvents m and hot water. The invention Polymer composition containing vinyl homo or copolymer, oligoester acrylate, lead stabilizer and polymerization initiator, characterized in that, in order to improve the adhesion strength of coatings on its base while retaining its heat and chemical resistance, it has an oligo etriacrylate content , and) -trimetacryl (bis-pentaerythritol) adipate or its mixture with oligoetheacrylate, selected by a group consisting of triethyleneglycol-° C, Sbis-diet glycol) phthalate ioC.Y-methacrylate- (bis-ethylene glycol) phthalate, in the following ratio of components, in m.ch. polymerization 0.6-2.0 Sources of information taken into account during the examination 1.Patent of Switzerland No. i 19605, cl. 39 b 22/06, publ. 1963. 2. Authors certificate of the USSR. according to application no. 2615808, cl. C 09 J W /, 1978 (prototype).