DE1907251A1 - adhesive - Google Patents

Description

Kemp & Korn '- _ _

δ Cologne-Lindenthal
Urban forest belt 20-22

B 52 P 100

Applicant: Boxes and 8ho © ks Mmit <ed _f

Deal Party Estate ,, Port Elisabeth ;, South African Republic

adhesive

Di © invention relates to a IClebatoff "the look wmi 3} anni ~ nea derived.

The © Sosdensationsproduki® vos l'anninan. with formaldehyde, has been investigated for many years to "produce a suitable adhesive for the wood processing industry from them". This adhesive is supposed to _{connect the 9} boards ^ Fa = serplattenj plywood or dergleiehen su »wabsi a long-lasting bond between the individual components is to be created. Bi © tannins were considered due to their poly «= phenolic nature. Adhesives which wxzä®n prepared from these Vorbindungen _t resemble in their properties in one, pointed extent cl © n Ph'enol / formaldehyde · * = adhesives.

However, the © implementation »between the Tansiia @ n and Formaldehyde practically spontaneously "and" was with the result that the product often for the standard application methods, for example unsuitable for spraying or spreading. Additive" The products do not have the binding properties that phenol / formaldehyde adhesives have.

To avoid the disadvantages of rapid condensation among others vorg "ecnlag © E _9, the two Heaktanten was aufsmbringst separately" so the reaction dasβ takes place in situ. However, <?.! · BiMeelgensohaftm of the products, ale accelerated

00982S / 1723

BATH

weather-uagatestsuntergogen (läagerß's immersion in boiling water) are still unsatisfactory «. Many attempts have been made to eliminate the disadvantages of the short duration of the adhesives and at the same time to improve the binding properties »jjedoeh & ^a * & ®i & @ 3? these attempts led to completely satisfactory results

The aim of the invention is to create an adhesive

the base of 3! ajininen ₉ of a longer ßebrauohsdaii @ r than. Has similar well-known adhesives and also has very good binding properties. “ SusäfeXisii has the advantage that this adhesive is resistant to water and weathering.

According to the invention, one or more herbal ones ne with one or more acetates of the aromatic series forming a product for condensation with IO aldöhyd or an orraaldehyde-releasing compound or reacted with another aldehyde or other aldehydes to form an adhesive.

preferred aromatic acetates consist of tat, acetophenone, phenoxyacetic acid , heeacetophenone, be @ o ~ diaoetophenone or the like.

The formaldehyde-supplying compound can consist of paraformaldehyde, irioxane, hexamethylenetetramine or the like.

The reaction is preferentially with a Xempexatms? 80 and 95 ⁰ O carried out and runs better in a basic catalyst, wlt for example fyriäim the same. The aromatic acetate is preferably used as a ghee eye, but it can also be used in situ

. _: 009825 / 17Ϊ3.

BATH

Components are formed into a highly concentrated solution by Sannim in the presence of a suitable catalyst * For example, bienyl acetate. Addition of phenol xmä Sssigsäuresusnyärid. % n of the Srnmialoeirngs which © la © small amount of pyridine or a mixture of this compound © prevents _p gs.

The storage time of the product formed in this way is practically unlimited.

The condensation of the process (wad swar & above "b =) with formaldehyde or a formaldehyde flow send ¥ @ rljiad« ag or eisi © M other aldehyde fell more slowly than the ond © asstios des 2an ~ nins als eöleli @ s _o This is literally from "betrlshtllGlier Be ~>deii'feimgo Si © KoMeasaties, followed by S! © iäp @ raturen over 90 ° 0. A \ ib this © ® © EWiaS Miaa, i, © 2 "Habstoff regarded as liitaehärtbar

Xharch the Brfindimg will f @ sa © r © im faasiiapg © ai & t s ^:? ii? Available ρ das la der vörst © li @ ad btseliriefeesea. Wise treats vfordsm let "ate as an eisi® Kompoaest® @ ia @ e glue used vjsrfien kaianj wSteeaöle other components of the 3? Οπβ = aldehydo or is the compound that provides forsialdehyde or another aldehyde _e Ia The Hahratsi are therefore charged with the Schaffui & g e £ a®s S \ f®ik ©! apoa®aten-Elestoffs _t whereby the © KoKipoaeafe © bxlb d © n treated® »fannins bestslitj v ^; listening to you © aw © it © EoMpoa @ git © from lor «ialdehyde or a formaldehyde or eiaea other ü.ld@hydlauf © radea ¥ © r bond.

Different iaxoiine köjanen inventwigsgemäee v © n? / Ends are, both Seimine d © r Br®ng © atechin- and the

009825/1723

ssieli | @ i @ sSi. li © j? amsg @ st @ lltρ that

un lie ,, Gege & ftbes? dea l © tgt «© 2? are, where © ± cli © axirchen the two & 3? ΐΐρρ®Ώ, lying

f that in South Africa as

is, l £ © gt swischen den b © id @ n G-mppsja land kasm as from Folypheüoldn beteaeht ^ t ^ @ M © a _g äie ai ^ s

3at © cMn ₈ PMorglaeia or E @ sö2? Ö £ s fe © st®li @ ia diesea TerMaimgen absteassien.

Is is on it MsiEiweise ₉ dasa dies © I © t? It®r © & opposite FosiBsldehyä ei & ea w @ ß! Is®la € © B Hea instruct »Man jiisiiit that you © v © 2? L £ @ g @ 2ädl © B3? £ iafliissg © Steuerwag ä © s SsaktlTitätegraäes © xmogliohtg s © dass

sation ^ SfeseM dea Bi & ßevsrfahffe & s besnäet

Je iiacli the chosen type äe.s Aläeliyäe oä © x- der I.

^ erbi & ou & g came up the ÜJepfasit d © s El © "bat © ffe

sr each Seitpimkt up to zn 40 Stusadea voe ¹ i © r 'dimg hes ^ divided t / @ 5? den kmm. With / msaalm® Yoa

tetffasiiiXp ög.e in water leioint löellöli is _p sollt®

L3sXiehk @ it i3fe-sits @ n ₉ which exceeds 3 '~ p »A mixture of

also vö ^ w

£ o3.g®3ai © & example ©

00 a.S. 25/1723

BATHROOM OPV

example 1

700 g of its Akaaienextrakta (wattle extract) with a solids content of about 85 56 are ^{heated to 90 0} C under reflux srsöaMaen salt 500 ecm of water »whereby a solution is obtained that has about 60 $> solids», especially on a dry basis .

1.5 g (or 0.25 #) pyridine are sugesetet with continuous stirring, whereupon 24 g (or 4 <f) phenylaoetate, which is added in small amounts, is added. After 2 to 4 hours, ° ~ stirring "the temperature being maintained at about 90 ⁰ C 'is a sufficient amount of sodium. or potassium hydroxide "dissolved in water" added to raise the pH to 5.8 - 6.0 siu.

After cooling, the extract obtained is ready for manufacture the leimmisohung done.

The preparation of the lei mixture is carried out as follows:

Example 2

4 »5 parts by weight of faraformaldehyde are 100 in powder form Parts of the converted acacia extracts (as 60% aqueous ge! solution) added with stirring.

The Extraktfeotstoffgehalt to 50 i> herabgenetat by adding 20 parts of water, so that a spraying onto which is possible to be connected 24atarial. If necessary, the? 08t®toffgehelt can be reduced to about 40 i anyway by adding more water

I $ ®iM v © r @ ts> i3he ^ ₉ & ®am is no addition of water

009825/1723

BATH

Example 3

3.5 parts by weight of hexamethylenetetramine, dissolved in 20 ropes Water, 100 ropes of the converted acacia extracts (as a 60 # aqueous solution) are used, reducing the extract solids content is reduced to $ 50. The mixture is in this form for spraying onto the material to be bonded suitable. If the glue is spread, then the hexamethylenetetramine becomes added in powder form.

In both examples, no fillers need to be added. lioh, when the glue solution is sprayed. However, should the The mixture is then streaked onto a film material fillers can be sugesetst.

Certain ingredients, such as wax emulsions, Sodium pentachlorophenate or the like are to be treated with the The le inmi described in the upright position are very well tolerated and can optionally be mixed in.

Different types of boards, such as multilayered ones Plywood boards can be used according to standard methods produced by ieimmisolumgen produced according to the invention will.

Beis piel 4

In the usual way, a 5-layer wall board is used (partiöle-board) with a thickness of 12.5 mn Surch Scatter made of wood flakes. Siir manufacture the A glue length is used for the outer sleeves, ie © 1 converted acassle extract solids. To Schnitzel for the core are made using a ^ applied, the 9 ^ of converted ExtraktfeetofftE sprits. These quantities refer to the te®ck @ s & ®

0 0 9 8 2 5/1723

BATH ORIGINAL

1307251

" Il

B © ss © gea BMt 2? © i & L © i3 isaaisi, mMan al © itagQa ' wie f © Xgts 10 * 5 te? * Β _? 3 ₉ da 100 ropes de ;?

fäksr 50 feil © aa W ^ is & ingta @ at.feslt © a _a i £ ©! r.eim © fassmdne sind «

ττοη O »0640 - Ο ₅ ββο S« f-fi- siacl as-

il g EIO kg / SQM

wigk

C teasile pp
rm, o5i clem lii- ^; ö5s &

mioh i,

a) isi few

h) in

“24 hours.

igk @ ii5 ia E.

25 ^s C ϊ 9,

the boards

at

% 4-it f>

ggtüst-fes S, !!

⁴ "

ia tlte'iefeer ¥ @ ise! i ©? ig @ st €? lit · * where

a & © χ · sick g © g © a3Üb © rli © g0ndeB fläelisa des? gew @ iiigea r © with des? ves?sthabenfe@B.ii fe © sökL * i @ lj © nen I-eiMaiselimig fee

20 f & K © koenu ^ mihMl ^f sm & ^ hl _t "be · =

el? aaQlist © b, ®acl

who

«Wsid

0 0 9 8 2 5/1723

<*. -: .yyy _{p; V,} j] .-. _: . r yp. ^ f p v-_ ^; = s

UragesetBter Ucacia Extract (35 % $ © Bt @ to ££ @) 100 Eewiobt parts

i I

water

13-15 g of the above

β ~ 6.5 g A & azienextrakt solids) per O ₈ 09 m (square on gel applied glue are used, whereupon the © plates, long grooves under usual conditions susaiamen fit,

The inherent physical liability & Si <§s © 3? Plywood is as follows, s

Vision strength 18 ^ 5 kg / e®

Failure of wood, $ 95 ^

Shear strength after biatauehea in boiling water during a

3eitsps3T «m © tone T2 stim £ © K. _B wofesi Is. 2

moist state is tested 14 * 0 kg / E®

Failure of the Heises, % 95 i>

eggs Pamiere with the Seiiaiaiecliimg beschii @ ht © t

00982 5/1723

Claims (1)

- 9 claims SISSSiSSSSSSSSSSS 1y adhesive of the type consisting of a condensate of xannin and Formaldehyde, a compound or a another aldehyde, characterized in that the xannin is first reacted with at least one aromatic acetate has been. 2. Adhesive according to claim 1, characterized in that the aromatic acetate from phenyl acetate, acetophenone, Besaceto » phenone, resodiacetophenone or phenoxyacetic acid. 3. Adhesive according to spoke 1 or 2, characterized in that the Ponaaldehyd ^ Lieferaäe compound of paraformaldehyde »trioxane or Hexametfeyl © at © te © ia £ ia b@sthabenfe.t _o asßielffi © t ₉ ü & bb © in ffMssliefess fsaaia l®s fs ^ did isagssetst will, Fozsaalde- / 1 7 ds8a the reaction between the vegetable sasmin and the aromatic acetate is carried out at a temperature of 80 and 95 ⁹ C in the presence of a basic catalyst. 8. The method according to claim 7, characterized in that pyridine is used as the basic catalyst. 9. Two-component adhesive compound, characterized in that that the first component from the reaction product of a vegetable tannins with at least one organic acetate, while the second component consists of formaldehyde, a sormaldehyde-supplying compound or another Aldehyde composed. 009826/1723 BATH ORIGINAL