SU551353A1 - Adhesive composition - Google Patents

Description

(54) GLUE COMPOSITION

This invention relates to thermoplastic adhesive. The use of ethylene / vinyl acetate copolymer used in the furniture and construction industries to glue facing materials (plywood, laminated plastics, thermoplastic films, etc.) to the edges of the decorative parts, for example sandwich structures with foam filler, wood and wood materials.

Adhesives based on ethylene-vinyl acetate copolymer and rosin esters are used in the furniture and other industries.

These maple have a lack of stability over time. Thus, the strength of adhesive compounds based on a copolymer of ethylene with vinyl acetate and glycerin ester of gum rosin (1: 1) after 9 months of hardening under operating conditions decreases so much that spontaneous delamination of the facing material occurs. After 30 days of storage under the same conditions of the composition in the form of a film, it almost completely loses its thermoplasticity and hot tackiness and is easily destroyed by bending.

Adhesive compositions based on a copolymer of ethylene and acetic acid and rosin produc- tion are known, in which various antioxides of phenolic type are introduced to eliminate the above-mentioned deficiency: tioalkocofie MBP - 2.2 thiodide - (4-methyl-a-methylbenzylphenol), ionol -

4-methyl-2,6-di-tert-butylphenol. However, these stabilizers do not provide sufficient stability of the properties of the adhesive. The most close to the invention is the adhesive composition, which includes a copolymer of ethylene and vinyl acetate, rosin ester and stabilizer - a synergistic mixture of 2,2 - methylenedi (4-methylene-6-0-methylcyclohexylphenol) and dilauryl dithiopropionate (Ionox VSP-DLDTP).

This composition also does not possess sufficient stability of properties, which does not allow its use in products for the calculation of long-term operation.

In order to increase the stability of properties over time, the proposed adhesive composition based on ethylene vinclacetate copolymer and caifol ether is added to, as a stabilizer, 1,3-daaryl (cycloalkyl) amino cyclodiphosphaero "KMeii of the formula:, NH-T x. n-N H-Tl p NH-1 where R is aryl, cycloalkyl, with the following correlated compound, weight. h .: Copolymer of apayua with winlapatch lOO Ester of rosin 75-100 Staleniz-p, 0 The stabilizers of the indicated formula are obtained by the interaction of primary aromatic or cycloaliphatic strains with phosphorus trichloride (chlorine) in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium, in the medium;

Copolymer (vinyl acetate content 28.2 wt.%, Yield agent raomava 200 g / 10 min)

Glycerin z4shr gum rosin (softening temperature 80 ° С, acid number 12.1)

Product C-367 (1,3-dicyclohexyl2, 4-diikloheksnlamnnotsik od'phosphaem Product BTO-1 (1,3-difa sh1-2.4 nilam iocyclofosphazai) A comparative characteristic of the known and proposed glue compositions is given in Table 2. As seen from, Data of Tables I and 2. The proposed composition possesses a high stability of properties during storage and processing, as well as during the operation of adhesive joints. The proposed adhesive composition 1 according to PPPU-3 9.9-10.7-13.1 10.1-10.9-11.6 PS-110.1-11.3-12.5 10.1-11.0-12.5

100 100 100 100

75 75 75 75

0.5 2.0 Table

8.6-9.5-11.0 8.7-9.5-11.7 The adhesive composition is prepared in the following way. Rosin ester and one hundred & The lyser is melted in a Werner-type mixer at 120-150 ° C. Then a copolymer is added to the melt at continuous mixing, raising the temperature in the mixer to 160-180 ° t. After obtaining a homogeneous mass, the composition is cooled to 1001-120 ° C and molded from the top of the granule, tablet, 1FU1KI, etc. To the surface to be glued, the composition is tanted in a molten state at 140-200 C. Below are the specific compositions of the adhesive compositions according to the invention. . In tab. 1 p | I vypeny results of testing the quality of bonding with presenting pregagging / glue composition of synthetics -k - face materials to the edge. parts with a filler from ne oplasy brands PS-1 and PPU-3c. e. - 0.5 to 2.0 times the process requirement} w m, implies MbiM to adhesives when automatically veneering the edges of furniture panel details: it is quite thermostable, easy to apply - on the surfaces to be glued and possesses high adhesion to the materials being glued, which allows Use it in the production of special plastic furniture.

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Claims (1)

Invention Formula Adhesive bonding, including a copolymer of ethylene with vinyl acetate, rosin ester and a stabilizer, characterized in that, in order to improve the stability of the properties of the composite, it contains ji as a stabilizer 1,3-diarsh (cycloalkyl) -2,4-diaryl (dicloalkyl Amino acid cytophosphate of general formula eight HH-tJ I R  h N h N-H NH-K where R is aryl, cycloalush, yri the following ratio of components, paddle: A copolymer of ethylene with an innart 100 Rd rosin 75-100 Stabilizer 0.5 - 2.0