Preserving compositions for cut flowers
United States Patent 11 1 Sy et al.  
 [451 Apr. 1, 1975 PRESERVING COMPOSITIONS FOR CUT FLOWERS [75] Inventors: Max-Heinz Sy: Bernd-Dieter Holdt,  
 both of Dusseldorf. Germany [73] Assignee: Henkel &amp; Cie GmbH,  
 Dusseldorf-Halthuusen. Germany [22] Filed: Aug. 18. 1971 [2]] Appl. No.: 172.866  
 [30] Foreign Application Priority&#39; Data 3.558.788 1/1971 Clark ct all. 424/343 3.629.464 l2/l97l Noslcn ct al 424/343 Piillllll&#39;) Ewminer-James 0. Thomas. Jr. Attorney. Agent, or Firm-Hummond &amp; Littell [5 7] ABSTRACT A preserving composition for cut flowers consisting essentially of from 30 to 45 parts by weight of monosaccharides. from I to 5 parts by weight of a watersoluble aluminum salt. from 0.0l to 0.5 parts by weight of boric acid. and from 0.5 to 2 parts by weight of a water-soluble germicide. aqueous solutions containing the same and the process of preserving cut flowers utilizing aqueous solutions of the preserving composition.  
 8 Claims. N0 Drawings PRESERYTNG C()&#39;.\lP()SlTl()NS FOR (IT FLOWERS TH F. PRIOR ART It is known to add compounds. such as common salt. acetylsalicylic acid. lphenyl--l-dimethylamino-Z.3- dimethyl-pyrazolone-tl or also amino acids. such as l\-( Z-hydroxyethyl l-beta-alanine to the water used for the preservation of cut flowers. Aluminum sulfate and disaccharides have also already been used. The effect of these additions is. however. not of long duration. There are also considerable differences depending upon the kind of flower utilized.  
 OBJECTS OF THE INVENTION An object of the present invention is the development of preserving compositions for cut llowers that have good effectiveness and are useful in the preservation of as many flower species as is possible.  
  Another object of the invention is the development of a preserving composition for cut flowers consisting essentially of from 30 to 45 parts by weight of monosaccharides. from l to 5 parts by weight of a watersoluble aluminum salt. from 0.0l to 0.5 parts by weight of boric acid. and from 0.5 to 2 parts by weight of a \vatersolul&#39; le germicide.  
  A further object of the invention is the development of a method of preserving cut flowers utilizing an aqueous solution of the above composition.  
  These an other objects of the invention will become more apparent as the description thereof proceeds.  
  The above objects have been achieved and the drawbacks of the prior art overcome in the development of preserving agents that have a good effectiveness and make possible the preserving of as many flower species as possible. After extensive experiments it was ascertained that for this only very definite combinations are suitable. It has also been found that the preserving agent compositions have to have an acidic reaction.  
  The novel preserving agent compositions for cut flowers of the present invention are characterized in, that the compositions contain from 30 to 45 parts by weight of monosaccharides. from 1 to 5 parts by weight of aluminum salts. from 0.01 to 0.05 parts by weight of boric acid and from 0.5 to 2 parts by weight of germicidal additives.  
  As monosaccharides. mannose. galactose. gulose. and preferably, glucose. in the form of dextrose (dglueose) are suitable. Suitable aluminum salts are particularly water soluble salts of acids such as aluminum formate. aluminum sulfate. and aluminum tartronate. It is. furthermore. essential that the preserving agents contain water-soluble germicidal additives. For this such compounds have been proven particularly good that can evolve formaldehyde. in aqueous solutions such as condensation products of formaldehyde and monoethanolamine. Further. N-methylol compounds of halogenated carboxylic acid amides with two to six carbon atoms, preferably chloroalkanoic acid amides. such as the N-methylol compounds of 2- chloroacetamide. 2.2-dichloroaeetamide. 2.2.2.- trichloroacetamide. 2-chloropropionamide. 2.2.3-trichloropropionamide and Z-chlorobutyric acid amide are particularly effective.  
  The preserving agent compositions can be added to the flower water as solids. preferably in amounts of from 0.25&#34;? to 2&#39;). It is. however. appropriate to prepare aqueous concentrates. in order to obtain a simple and uniform dosing. Preferably concentrates are prepared that contain per liter of water. from 300 to 450 gm of monosaccharidcs. from H) to 50 gm of aluminum salts. from (H to 0.5 gm of boric acid and from 5 to 20 gm of germicidal additives. These aqueous acidic concentrates are added in amounts of about It) to 40 gm/liter to the llower water. The pH-value of the aqueous solutions lies generally in the range from 4 to (i. Preferably such solutions are used that contain. as monosaccharides. dextrose and. as germicidal additives. N-methylol compounds of halogenated carboxylic acid amides with two to six carbon atoms.  
  The novel compounds increase the durability of cut flowers considerably and have a broad spectrum of effectiveness in regard to the various. particularly commercially available llower species. They are. for example. suited for chrysanthemums. roses. carnations. irises. gerbera. calendula. gladioluses. lilies. and so on.  
  The following examples are illustrative of the in\ention without being deemed limitative in any respect.  
 EXAMPLE 1 An acidic. aqueous solution with the following ingredients was prepared:  
  I ol&#39;devtrosc monoltydlale 2.5 i of aluminum sulfate. cryst.  
 I of horic acid &#39;4 of a condensation product of l&#39;ornialde hyde with 2-chloroacetamide Forsythiae ll3 lrises U8 Lathyrus l2l (&#39;alendulae l3) Convallal&#39;iae I25 Rose &#34;Bel Ange l4: Lilies I26 Rose &#34;Montezuma&#34; 153 lladiol uses l2) (rysjndicum lot) &#39;itions I34 (iilly flowers 102 (ierber I35 (hrys.leucanthcmum Maximum&#34; 1 (1H EXAMPLE 2 An acidic aqueous solution contained the following ingredients:  
 30 l ofdestrose 5 i of aluminum form-ate 0.0] &#39;1! of horic acid 7: of a condensation product of equimolecular quantities of formaldehyde and monoethanolaminc l gm each of this solution were added to one liter ol tap water.  
  In a comparison experiment approximately the same times for the lile time of the llowers were obtained as in Example I.  
  The preceeding specilic embodiments are illustrative of the practice of the invention. It is to he tmderstood however. that other cxpedients known to those skilled in the art or disclosed herein ma v he employed without departing from the spirit ol the invention or the scope of the appended claims.  
 We claim:  
 &#39; l. preserving composition l&#39;or cttt l&#39;lowers consisting essentiall ol l&#39;rom 30 to 45 parts h v weight of monosaccharides. l&#39;rom l to parts by weight of a water-soluble aluminum salt. from ().()l to 0.5 parts h v weight of horic acid. and lro1n(l.5 to 3 parts h v weight of a water-soluble germicide evolving formaldehyde in aqueous solution selected from the group consisting of soluhle aluminum salt is selected from the group consisting of aluminum l&#39;orniate. aluminum sullate and aluminum tartronate.  
 5. The process for preserving cut llowers which consists oladding from 0.25% to 2&#34;? ol the composition olclaim I to the llower water and inserting cut flowers therein.  
  6. An aqueous concentrate composition for preserving cut llowcrs consisting essentially of. per liter ol water. from 300 to 450 gms ot&#39;a monosaccharide. from It) to 50 gms ol a water-soluble aluminum salt from (H to (L5 gms ot horic acid. and from 5 to 20 gms ol a water-soluble germicide evolving formaldehyde in aqueous solution selected from the group consisting ol condensation products of formaldehyde and monoethanolamine. and l\&#39;-meth vlol compounds ol chloroalkanoic acid amides having from two to six carbon atoms.  
  7. The aqueous concentrate composition of claim 6 wherein said monosaccharide is dextrose and said water soluble gertnicide is an N-methvlol compound ol a chloroalkanoic acid amide having from two to six carbon atoms.  
  8. The method ol preserving cut flowers which consists ol adding from It) to 40 gm ol the aqueous concentrate composition of claim 6 to 1 liter of llower water and inserting cut (lowers therein.