RU1786054C - Glue composition - Google Patents

Abstract

Usage: in the woodworking industry upon receipt of adhesive compositions. SUMMARY OF THE INVENTION: composition contains, may. %: aminoformaldehyde resin 51.84-58.20, curing catalyst 0.518-0.582, transesterification product of titanium alkoxyl compounds (individual or oligomeric) with alkanolamines at a ratio of 0.5-1.0 mol of mono-, di- or triethanol (pro-panol) amine per alkoxy 0.271-2.769, butanol 0.185-3.284 and water 38.031-45.056. 3 tab.

Description

fe

The invention relates to the woodworking industry, and in particular to compositions of adhesive compositions that can be widely used for gluing wood, paper, in the production of particle boards, wood-fiber boards, composite materials, plastics, plywood, etc.

A known adhesive composition comprising a urea resin and a hardener used in the manufacture of chipboard 1.

The closest in technical essence and the achieved effect to the invention is a glue composition containing a urea-formaldehyde resin and a hardener (ammonium chloride), which is widely used in the manufacture of chipboards 2.

A disadvantage of the known compositions is their low strength materials.

The aim of the invention is to increase the strength properties of products based on adhesive compositions: increase the strength of adhesive products by 25-60% in the dry state and by 67-150% after soaking for 24 hours in water; a 15-58 increase in the flexural strength of the resulting chipboards.

The goal is achieved in that a product of transesterification of titanium alkoxyl compounds (individual or oligomeric) with mono-, di- or trialkanolamines, obtained at a ratio of 0.5-1 mol of alkanolamine, is introduced into an adhesive composition comprising an amideformaldehyde resin and a hardener - ammonium chloride one alkoxy group of a titanium compound.

ABOUT

about

Joint venture

Example 1. Synthesis of the product of transesterification of tetrabutoxytitanium triethanolamine at a ratio of 0.5 mol of triethanolamine per butoxy group (comp. 5, Table 1).

340.4 t (1 mol) of tetrabutoxytitanium are charged into a four-necked reactor equipped with a stirrer, thermometer, dropping funnel and reflux condenser and 296.3 g (2 mol) of triethanolamine / T are pinned with stirring. Self-heating of the reaction mixture to 47 ° C is observed. After pinning and subsequent stirring for 1 hour at this temperature, the mixture is heated to 120-140 ° C and butyl alcohol is distilled off. After the termination of distillation, the reaction mass is vacuumized at 120-140 ° C and a vacuum of 1 mm Hg. to constant mass. 327.5 g (96.2% by weight of theory) of a viscous product corresponding to the compound are obtained. 5 tab. 1.

The remaining compounds were synthesized using a similar procedure. Their physicochemical constants are given in table 1.

Example 2. Testing the strength of adhesive joints.

 The adhesive composition is prepared by adding to the aminoformaldehyde resin a 20% aqueous solution of ammonium chloride and a butanol solution of an organotitanic compound and stirring for 5-10 minutes. The formulations of the adhesive compositions are given in table.2.

Wood samples (oak species) of 20x20x60 mm in size, pre-glued with an adhesive composition, are glued crosswise, cured at a temperature of 100 ° C and a pressure of 0.1 MPa for 60 minutes and tested after a day for uniform tearing. A part of the glued samples is preliminarily kept in the form at 20 ° C and then tested. The tensile strength is given in table.3.

. Example r 3. Production of wood. particle boards.

The manufactured adhesive compositions (binder) of the composition indicated in Table 2,

diluted with water to a working concentration of 55 wt.% and mixed in a laboratory mixer with wood filler for 6-10 minutes. Coniferous shavings of fraction 10/5 with a moisture content of 4 wt.% Were used as a wood filler.

The amount of binder is 12% by weight on dry matter based on the weight of the wood filler.

From the resulting wood-glue mass, a package of a single-layer board 40x40 cm in size is formed (proceeding from the thickness of the finished board 16 mm and an estimated density of 700 kg / m3), it is prepressed and the chipboard is pressed at a temperature of 170 ° C and a specific pressure of 2.2 MPa for 7.5 MvtH.

Testing of finished chipboards is performed according to GOST 10632-88 a day after pressing. Their physico-mechanical properties are given in table 3.

Claims (1)

The claims A glue composition comprising an aminoformaldehyde resin, a curing catalyst and water, characterized in that, in order to increase the strength characteristics of products based on it, it further comprises a transesterification product of titanium alkoxyl compounds (individual or oligomeric) with alkanolamines at a ratio of 0, 5-1.0 M mono-, di- or triethanol (propanol) amine per alkoxy group and butanol, in the following ratio, wt.%: Amino formaldehyde resin 51.84-58.20 Catalyst curing 0.518-0.582 Transesterification product of the indicated composition 0.271-2.769 Water 38.031-45.056 Butanol 0.185-3.284.  Physico-chemical constants of the used titanium-organic compounds W Structurn "formula p / p 1Ti- (OCH, CHaNH,) + 2Ti-COCHjCH.jCHzSHz) 3T1- (OSNgSYa2NNSN, SNgON 4 t.sngsnl. OCH2CH {f 5 .sn2sngon osngsngh OCHjCH NHz 6 (H2NCH2CH20) 3Ti-f OT -); RELAYNGSNGWH} osngsnging 7 .-. Osngsngmn2 (H2xngsn2o) 1t ;-( from 1-) 10ot; (Osngsngyn2) s - - .. OSN2SNGYNG  titanium-organic compounds Output. May 1st. | .ov .....---1- Found ,, us. % Ti Gross formula calculated May. . ----- ....----- тЈ Т Г conc. I, 0 Т ю Г l ± -J-: a: -: -, ------ A J J Table T Characterization of Outanol Solutions SL 98 98 98 97.6 96 UFO ..16.5033.7019.50Ti 4C ,, () JJ§W1 .5.50 13.7042.1013.10II St.,} m 1.5080, 0.1541.60.2.16 "0, .4 ,. ) 0 ..4780 .8.7037.9511,30Ti04CfH ,, N ,, 3, I.OO 1 (2.10 4.09 53.6 M73S1,019431,5 M7301.017530.1 t.WO1.054032,5 1.48301.004236.1 1.48101.003735.6 1.4859 13.90 42.30 4.15 T10, CaNmNg s 1.4930 22.50 26.90 15.SO PM ° NN Nw H, + 22.75 26.70 15.60 54.8 1.4720 1.0230 34.7 CO. oh oh SL -Ci 931.5098 23.30 25.70 15.10 - Т1вО „С„ Вед Н „23.50 25.50 14.90 55.8 1.4760 1.0270 38.9 Table 2 Formulations of adhesive compositions in wt.%. Components | Prototype Test Compounds 1II IIZ II IIIilJZ; iIIHII: LnZ IIinLl Resin (MA 100 -o) 58.20 - -57, VO 56.5} 55.59 56.12 56.4 56, And - - 56.53 Resin SPNF-4 Gna 1001. -o) - 54.40 - .- - - - - -. 52.85 - - h 51.8 Resin K "-MT (per 1001. .- "o) ... 58.2--. - - -. . 56.40 Ammonium chloride 0.582 0.544 0.5820.578 0.565 0.556 0.56 0.565 0.565 0.528 0.564 Ammonium sulfate - - -. . -. . „0.565 0.518 Water brought in. . with resin and cure 41.22 45.06 41.2241.04 39.37 39.30 39.68 39.9 39.93 43.66 39.88 .39.97 42.82 Product I tab. 1 - - -0,289 - ..... Product 2 tablets - - - 1,496 - - - - - 1,696 Product 3 .1 - - - - 2,779; -. . Product 4 tablets - - - - - - 1,685 - -. - - Product 5 tab. 1 - - --- - - - - - 1,586 1,692 - 2,532 Product 6, table 1 -: - ---. 1,694. . -. Product 7 of table 1. - - - - - - - - 1,694 .-. - - -. Butanol, introduced. -... with organotitanium. .:. connection - -0.289 1.244 1.779 1.962 1.355 1.338 1.374 1.466 1.244 2.229    .. T a bic a 3 Physico-mechanical properties of adhesive joints and particle boards Indicators PROTOTYPE I Experimental compounds . „.. JZIZIIi. The strength of soyleips ... normal range 2,304,602,804,214,70 3,95 4,50 5,20 5,35 6,20 4.60 5,40,6,60 separation, npa1727TGV5TTL O TZ T753 T33 T755 5755 SvJo MO feti STTo Lumber slabs. . . . . .-. .... Density, kg / f 670 678 683 666 680 661 676 663 681 670 666 Bending strength, ML 17.4 19.2 17.2 20.5 23.622.6 25.8 24.9 25.6 26.6 24.2 24 h water swelling - - -. -. when in water, t 19.3 16.8 19.4 19.0 18.017.0 16.2 17.0 16.1 14.1 18.2 Emissions free. . .... - ... formaldehyde . Todu puncher. - -: yig / 100 g of weed 9.2 19.2 17.6 8.0 7.07.6 6.3 5.2 5.0 10.4 8.2  in the numerator - data on the strength of the samples for normal separation one day after uncured, in, the denominator - the strength glued samples to normal separation after soaking with water at 20 ° C for a day