MXPA98009237A - Adhesives based on maltodextr - Google Patents

Abstract

The present invention relates to rewettable and non-rewettable adhesives containing at least 50% by weight of a maltodextrin syrup having a reducing sugar content of about 5-19 dextrose equivalents and solids contents of 60-80%. water and an effective amount of other conventional adhesive additives. When the adhesive is a rewettable adhesive, a chemically derivatized starch having an amylose content of 40% or less and a G.S from about 0.01 to less than about 0.50 is used. A preferred rewettable adhesive also contains polyvinyl acetate and / or polyvinyl acetate and / or ethylene vinyl acetate in an amount of about 15-90% by weight. The maltodextrin syrup is prepared from a granulated starch derivatized or not chemically derivatized, converted or not converted, by a process of conversion of single-phase enzymes with high solids content. When derivatized, the maltodextrin has (i) substituents in an amount sufficient to provide a degree of substitution between more than about 0.01 and less than about 0.50. Some of the chemically derivatized maltodextrins have a polymodal molecular weight distribution with a peak between approximately 630-1600 daltons and at least a peak between approximately 1,600-2,500,000 dalton

Description

ADHESIVES BASED ON MALTODEXTRINE DESCRIPTION OF THE INVENTION This invention relates to the use of single maltodextrin syrups with high solids contents in adhesives, particularly rewettable adhesives such as adhesives and non-reusable adhesive adhesives such as adhesives. Starches and dextrins have been used for a long time as a material adhesives in various applications "such as the manufacture of corrugated cardboard, paper bags, paper boxes, laminated cardboard, spirally wound tubes, stickers, gummed tapes and other applications to gum up. See the discussion in Starch Chemistry and Technology, 2nd Edition, by R. histler et al., 1984, p. 593-610 and Chapter 22"Starch and Its odifications" by M.W. Rutenber-g, pp. 22-63 and 22-64 in "Handbook of Water-Soluble Gums and Resins" edited by Robert L. Davidson and published by McGra -Hill Book Co., (1980). The categories of standard adhesives include liquid adhesives, pastes, cold water soluble adhesives, water resistant adhesives and numerous other applications. In most applications, the starch is cooked and solubilized as it is used as the only component in addition to the water in the adhesive or as an added component in more complex formulations to provide tackiness, overall adhesion, solution viscosity, stability and / or desired rheological characteristics required. ~~ Adhesives for specific applications include corrugation adhesives, multi-walled bag adhesives, laminating adhesives, tube winders adhesives, marker stickers, side bag sewing adhesives, fabric and towel adhesives, cigarette adhesives, adhesives for wallpaper, disposable adhesives, re-wettable adhesives, binding adhesives, cup and plate adhesives, seal adhesives for boxes and cardboard, adhesive to form cardboard, adhesives for rubberized coatings and the like Re-wettable adhesives are commonly used in production of envelopes, stamps, wallpaper, ribbons, labels and similar products in which it is desired to provide a dry, but rewettable, adhesive film In the manufacture of rewettable adhesives, normally an aqueous solution or dispersion or an organic solvent solution of the dry adhesive material is applied as a wet film to a substrate After the water or organic solvent is removed by drying and evaporation, the resulting dry adhesive film, upon being wetted, will produce the desired tacky adhesive surface. The ability to provide a re-wettable adhesive is not in itself difficult and, in fact, there are a number of known and commercially available products that are used in various applications that require re-wettable adhesives. Conventional rewettable adhesives have generally been prepared from either of two adhesive systems. The first class includes adhesives prepared by the addition of dextrin, plasticizer, and other additives for vinyl acetate homopolymers emulsified with dextrin. The second class includes homopolymers and copolymers of polyvinyl acetate that are emulsified with polyvinyl alcohol or dextrin to which polyvinyl alcohol or additional dextrin and plasticizer can be added later. The utility of a particular composition as a rewettable adhesive in a specific application will depend on its ability to meet the different requirements of physical and chemical properties and to better satisfy the processing conditions to which it is subjected. Accordingly, a rewettable adhesive composition in addition to providing good adhesion and rewettability, is normally expected to provide a flat product without curves, which is processable over the type of fabrication designed, "hygroscopic and thermal b resistance"., and satisfy several additional requirements depending on the application involved. Rewettable adhesives based on dextrins and / or modified starches do not require a change in the suitable properties such as adhesion and adequate tack, high solids content (60-70%), and usable final viscosity-stable (2500-25,000 cps) . Normally, a high molecular weight starch or dextrin is required for adhesion, although a lower molecular weight starch or dextrin is required for viscosity and stability. An adhesive is stable if it remains at a very constant viscosity after manufacture. Most adhesives are used within a year of manufacture. If the adhesive increases or decreases in viscosity over time, the machining characteristics will be adversely affected to-itself as well as storage management-and shelf life / usefulness. If the viscosity increases - over time, it will exhibit paste formation and lack of flow, the adhesives will not work more properly and will result in poor coating. ~ Flow problems can also occur when the adhesive is removed from storage containers that can vary in size from 18.9 to "26.460" Titers (5 to 7000 gallons) or more.

A method for "stabilizing" an adhesive based on starch or dextrin is by heating the dextrin or starch cooked in the presence of formaldehyde or glyoxal to effect a light crosslinking which minimizes the retrograding of the starch or dextrin (i.e. loses hydrogen bonding), which is commonly referred to as "pasting". There is an inherent problem because the higher molecular weight dextrins provide excellent adhesion, but the adhesives are extremely high in viscosity and have poor viscosity stability, while lower viscosity adhesives contain excess water (added to achieve machine viscosities) acceptable) although, as a result, global adhesive solids are decreased. The use of low solid adhesives also results in slow machine speeds because the coated adhesive must be dried before packing. In contrast, low molecular weight dextrins provide low viscosity, high solids adhesives that give poor adhesion, and poor tackiness when rewetted. Moisture resistance is very important when formulating a re-wettable adhesive. The adhesive must not be reactive prematurely when exposed to normal atmospheric conditions.

"Blocking" is the undesirable adhesion that can occur between contact layers of a material under certain conditions. The resistance to hygroscopic blockage is the ability of the adhesive to resist reactivation due to moisture. In a situation where the substrates, such as covers or stamp sheets are coated with an adhesive that is not resistant to hygroscopic blocking and are stored and exposed to varying degrees of humidity, there is a tendency for adjacent surfaces of the stacked substrates to Adhere and stick to each other Thermoplastic blocking is the adhesion that can occur when adhesive-coated substrates are exposed to varying temperatures and pressures during processing, storage and other handling operations. Blocking can exist for example - during the storage or stacking of products that are processed, during the printing of products such as printing of laser jet of papers and on and during the perforation of sheets of stamps and other products. used, the amount of pressure that is created can cause the blockade in formu non-resistant adhesives. The hygroscopic block "has been defined more particularly by a standard test method, ASTM D 1146-53.The hygroscopic lock is measured on a test specimen at 50% relative humidity at 38 ° C for 24 hours. blocking (free), then - it is measured at successively higher humidity increases until "the blocking occurs (critical humidity) or until an adequately high humidity is reached. The thermoplastic block is measured under them. The ASTM D procedure at 38 ° C for 24 hours. If there is no blockage (free), it is measured at successively higher temperatures (increments of 5 ° C) until the blockage (critical temperature) occurs or until a suitably high temperature is reached. The conditions of high humidity and high temperature especially suitable for determining the hygroscopic and thermoplastic block are 95% relative humidity and 90 ° C. Since rewettable adhesives are mainly used on paper substrates, the use of excess water "may result in poor or" curled "flattening of the coated surface.The paper absorbs water and swells, distorting the original configuration of the paper. Paper fibers As the adhesive dries, "wrinkles or" curl "occur due to the uneven proportions of expansion and contraction of the paper backing and adhesive film. Excessive curling can cause the equipment to get stuck or other handling difficulties. While some maXerialés of adhesives have good properties of flattening or not curled, others require several techniques such as the addition of humectants to overcome or minimize this curling tendency. While these techniques often "relieve the problem of curling, they can adversely affect other properties such as resistance to hygroscopic blockage." To solve this problem, the overall amount of water in the final adhesive formulation can be reduced or wetting can be added. They act as diluents and do not distort paper fibers, however, the use of humectants increases the time required to dry the adhesive.The use of humectants also reduces the moisture resistance of the adhesive since the humectants are hygroscopic. They are used in the preparation of many liquid and dry dyes including re-wettable adhesives. There are four main steps in the manufacture of pyrodextrin: acidification, pre-drying, dextrinization and cooling. In the early stages, hydrolysis is the main reaction and the viscosity of the starch is substantially reduced to almost the level of the finished dextrin. Repolymerization becomes a major factor as the temperature rises. As the reaction progresses, an equilibrium viscosity is reached and at increasing temperatures, a transglucosidation reaction predominates. There are two main characteristic changes, one is the molecular size of the dextrin molecule, the other is a change in the degree of linearity. Each has a specific effect on dextrin's "chemical" and "physical" characteristics.The variation in molecular weight -independence influences the viscosity of dextrin, while changes in linearity greatly influence the stability of the dextrin. Solution The use of pyrodextrins in re-wettable adhesives requires compromises in the formulation of adhesives between the desired solids, viscosity, tackiness and strength and stability. In addition, the adhesives suffer from color problems. Adhesive adhesives require superior adhesion "and" Tarias "classes of adhesives are used in the binding industry, for example, synthetic emulsion adhesives, such as polyvinyl alcohol or polymers in" tilevinyl acetate ", are used on leaves of guard, for gluing of blocks, for operations of gluing of loin, for insertion of the book sewn in its covers, stuck of loin, lateral gluing, and in the productions of covers of books with special stencil applicator. Hot melt adhesives, consisting of polymers, thickener resins and waxes, are mainly used as single-dose adhesives for paperback books and magazines, in multi-dose applications in the production of catalogs and in joining in parts. The starches derived from corn, potatoes and tapioca are used to produce pasta, generally for the manual manual binding section and sometimes for operations such as the formation of guard and gluing sheets or for the production of manual leather book covers. The production of book covers is one of the most demanding binding techniques. Due to the adhesive properties required, animal glues are mainly used for the manufacture of book covers and lining and only occasionally in seamless lines. Animal glues consist of one or more kinds of gelatin in a water solution. They give an intense stickiness with a medium fixing speed. Since they are derived from natural materials, they are very susceptible to seasonal factors and tend to vary with their source of supply. Operators who use these glues have to be "experts to achieve the right degree of tackiness." Most animal glues age and become brittle under dry and warming conditions as evidenced by the condition of the back of a book during a week. time in a centrally heated home.

Most of the adhesives "for the production of cigars are based on synthetic polymeric systems, however, there is an increasing tendency to use natural products in this area Modified starches, such as chemically modified starches and dextrins, are being used to The adhesives containing these starches and dextrins have a Brookfield viscosity of approximately 500-5000 cetipoises and are used in all applications including seams and lateral perforations.A Lateral seam is the joint produced to facilitate the formulation of filled cigar rows The perforation is the process by which the separated filter section is combined with the section filled with tobacco by means of an overlapping union.The corrugating adhesives are separated using starch, water, alkali and other optional ingredients, for example , a waterproofing agent.The starches used as the carrier portion may contain portions or mixtures of starch with high amylose content. There is a need for improved maltodextrin-based adhesives having a higher adhesive solids content which maintains a usable viscosity during storage and which provide good adhesion and which also provide good leveling properties, blocking resistance and tack when the adhesive is a Re-wettable adhesive and is resistant to moisture changes when the adhesive is a binding adhesive. The present invention is directed to adhesives containing unique maltodextrin syrups that are prepared by high solids enzyme conversion process. The adhesives include re-wettable adhesives based on maltodextrin with high solids content, re-wettable adhesives based on resins and non-re-wettable adhesives. As used herein, "non-rewettable adhesives" include liquid or paste adhesives that are coated on one or more substrates that are wet combined and then dried to form the bond. High-solids, rewettable adhesives consist essentially of: a) at least about 50% by weight of a maltodextrin syrup having a solids content between about 60 to 80% by weight and a water content of about 40 to about 20% by weight that is prepared from a chemically converted or an unconverted derivatized starch having an amylose content of 40% or less; whose maltodextrin has (i) substituents in an amount sufficient to provide a degree of substitution greater than about 0.01 and less than about 0.50; (ii) a reduction sugar content between about 5 and about 19 dextrose equivalents; and (iii) a polymodal molecular weight distribution having a peak between about 630 to about 160-daltons and at least one other peak between about 1600 and about 2,500,000 dantons; b) from 0 to about 50% by weight of water, and c) an effective amount based on the weight of the odextrin syrup in the rewettable adhesive of a preservative, a humectant, a defoamer, a plasticizer and / or a peptidizing salt. Resin-based re-wettable adhesives consist essentially of: a) about 15 to about -90% by weight of a resin selected from the group consisting of polyvinyl acetate, ethylene vinyl acetate, and mixtures thereof; b) from about 10 to about 85% by weight of a maltodextrin syrup - having a solids content between about 60 and about 80% by weight and a water content of between about 40 and about 20% by weight which is prepares a chemically converted or an unconverted derivatized starch having an amylose content of 40% or less; whose maltodextrin has (i) substituents - in an amount sufficient to provide a degree of substitution greater than about 0.01 and less than about 0.50, (ii) a reducing sugar content of between about 5 and about 19 dextrose equivalents and a distribution of polymodal molecular weight having a peak between about 630 to about 1600 daltons and at least a different peak between about 1600 and about 2,500,000 daltons; and c) from 0 to about 75% by weight of water. When the re-wettable adhesive is the resin-based adhesive, the polyvinyl acetate or ethylene vinyl acetate can be emulsified during the polymerization of the monomers with a part of the dex-highdextrin syrup which acts as a protective colloid. The amount of maltodextrin syrup used as the protective colloid is approximately 25% of the wet emulsion. Hydrolyzed moderate molecular weight polyvinyl alcohol can be added to the adhesive in addition to, or as a partial replacement for, polyvinyl acetate or polyvinyl acetate resins. polyethylene vinyl acetate in an amount of up to 10%, more preferably 2-5% of the wet formula. The suitable polyvinyl alcohol is Airvol 203 from Air Products, Alleñton, PA. Re-wettable adhesives are characterized by their combination of dry strength, wet tack, rewettability, long-term viscosity stability and light color compared to "re-wettable adhesives formulated with pyrodextrins." In addition, clay or other leveling adhesives may not be required. non-rewettable adhesives consist essentially of: a) "at least about 50% by weight of a maltodextrin syrup having a solids content between about 60 to 80% by weight and a water content of about 40% to about 20% by weight and which is prepared from a converted or unconverted starch and having a reduction sugar content of between about 5 to about 19 equivalents of dextrose, b) from 0 to about 50% by weight of water and c) an amount effective, based on the weight of the maltodextrin syrup in the non-re-wettable adhesive, of a preservative, a humectant, a defoamer e, a plasticizer and / or a peptidizing salt. Non-re-wettable adhesives are characterized by their combination of dry strength, long-term viscosity stability and light color compared to non-re-wettable adhesives formulated with pyrodextrins. The adhesives can be prepared from a maltodextrin recovered by drying the maltodextrin syrup after adding water or the resin in aqueous base. Non-rewettable adhesives can also be prepared from the maltodextrin powder by adding water or a suitable solvent Preferably, the maltodextrins are prepared by an enzyme conversion with high solids content, in a single phase that provides maltodextrins with a weight profile single polymodal molecular, when the starch is "a derivatized starch. This "polymodal" profile is advantageous for the claimed adhesives because the higher molecular weight portions of the maltodextrin syrup provide the required adhesion, while the lower molecular weight portions of the maltodextrin syrup provide lower final viscosities. Previously, these characteristics could only be achieved by mixing different starches and / or dextrins. L "ás_" chemically derivatized maltodextrins produced in the single-phase process "are inherently stable and no glyoxal or ormaldehyde stabilization is required.In the single-phase processes" to prepare the chemically derivatized maltodextrins, a portion may not be affected. of starch by the conversion of enzymes. Ungelatinized or partially gelatinized granules (usually less than 1%) alter film continuity and shrinkage and therefore contribute to the re-wetting properties of the re-wettable adhesive and moisture resistance. The resulting improvement in the non-rippling or flattening properties of re-wettable adhesives results in the reduction in the use of humectants, which in turn results in faster application rates and faster drying times. The single-phase high solids enzyme conversion process involves the steps of: (a) adding, to a chemically derivatized or non-derivatized granular starch, converted or unconverted, water and a starch hydrolyzing enzyme, water being used in a sufficient quantity to produce a single phase powder mix without a visible free water phase; (b) activating the enzyme by heating the powder mixture to approximately the optimum temperature for the enzyme while maintaining a substantially constant moisture content (i.e. within + 5% of the starting moisture content) in the mixture; (c) allowing the enzyme to hydrolyze and liquefy the starch; and (d) optionally inactivating the enzyme by reducing the pH, increasing the temperature and / or adding a salt of inhibition. As used in the present "starch" it is intended to include non-pregelatinized granular starches, pregelatinized granular starches and starches which are pregelatinized but not soluble in cold water and the chemically derivatized starches contain nonionic, anionic or substituent groups. Cationic "-and / or ester Preferred ester groups are hydroxypropyl, 3- (trimethylammonium) -2-hydroxypropyl, or N, -diethylaminoethyl groups Preferred ester substitution groups include succinate, octeylsuccinate, acetate or phosphate groups. As used herein, "a single phase" means a mixture that has no visible free water, while a "suspension" consists of two phases, i.e., a water phase and a starch phase. The preferred total water content of the conversion process is from about 15 to 40% by weight of the total mixture, except when a converted granular starch is being prepared with only one amylase wherein the total water content is about 15-35. %. The enzyme - powder or preferably liquid and water sufficient to give the desired total moisture content are arranged in a powder of granulated starch. The normal moisture content of granular starches is about 10-14%. Therefore, sufficient water is added in step (a) to bring the total amount of water to the desired amount. As used herein, the term "total amount of water" refers to the total equilibrium moisture normally present in a granulated starch and added water.

If the wet single-phase powder mix is subjected to a kneading and compacting mixing process, such that the pulp mixing equipment or normal viscous polymer forming equipment, depending on the water content and amount of present solubles, it can be converted into a compact pasty mass with very high viscosity before gelatinization and conversion is initiated. The continuous mechanical shear stress will raise the temperature and cause gelatinization and conversion. When the starch in the powder mix contains a granulated starch, as it is heated. powder mix, "the heat and humidity begin to swell - the starch and starch granules are gelatinized completely or partially and converted simultaneously." When the powder mixture contains a pregelatinized starch, not dispersible in cold water, the heat and moisture disperse the starch and the starch is completely gelatinized and converted simultaneously As the starch is converted, the powder usually liquefies The peak viscosity of the native starch is never reached XX XX ~ ~ ~ 2. The maltodextrin may be in the form of a syrup, a converted granular starch or a mixture of the converted granulated starch syrup As used herein, "syrup" covers viscous liquids and pastes. The resultant is obtained at a high solids content (for example at least 60%, usually 65-75% by weight) .The syrup can be spray-dried, band-dried or freeze-dried. Enzyme can be coated with the starch syrup as a water soluble powder. If desired, the sugar by-products can be removed from the converted granulated starch by washing. The enzyme can be activated by direct or indirect heating and / or pH adjustment at the optimum temperature and pH for the particular enzyme used. Optionally, an enzyme activator such as certain inorganic salts and / or a pH adjuster such as an acid, a base or a buffer solution can be used. The enzyme can be inactivated by adjusting the pH, adding a salt of inhibition or increasing the temperature. ~ The water content during the conversion is affected by the solids of the product, the condensation of injected steam used for direct heating and evaporation during the conversion. The product solids are increased by hydrolysis. During the conversion to a D.E. of _100, the dry weight of the starch is increased by 11.11% due to Xa covalent attachment of the water to the hydrolysis reaction products. This increase in dry weight is proportional to the degree of conversion. The solids are reduced due to the condensed current and are increased by evaporation.

The powder mixture of the starch, water and enzyme does not require agitation during the "enzyme conversion step" In contrast to the enzyme conversion processes of the prior art, the process is carried out at a high solids content since The mixture is in a single phase.The suitable starches depend on whether the adhesive is a rewettable adhesive or not.The suitable starches for the rewettable adhesives include any starches having an amylose content of less than 40%. Any starch is suitable for "non-rewettable adhesives, including starches with high amylose content (ie starches having an amylose content of 40% or more) .The starch can be derived from any source." Normal sources for starches They are cereals, tubers, roots, legumes, fruit starches and hybrid starches.The appropriate native sources include corn, peas, potatoes, sweet potatoes, wheat, rice, sorghum, waxy starches such as waxy corn, waxy tapioca, waxy rice, barley waxy, waxy wheat, waxy potato, waxy sorghum and the like A "native" starch is an unmodified starch, it may be possible to convert flour always "and when effective enzyme levels are used to obtain sufficient conversion.

The use of moisturizers in re-wettable adhesives may cause, or may contribute to hygroscopic blockage. In non-re-wettable adhesives, salts are often used at relatively high levels, an amount used being adjusted to lower levels when the adhesive is used in a humid environment. Chemical derivatization of starch may decrease the temperature of "gelatinization and make conversion easier to carry out." Chemical modifications useful herein include conversion by heat and / or acid, oxidation, phosphorylation, etherification, esterification, cross-linking and modification of enzymes. These modifications are preferably carried out before the starch is converted to an enzyme.The procedures for modifying, "chemically starches are described in the chapter" St-arch and Its Modification "by MW Rutenberg, pages 22-26 to 22-47, Handbook of Water Soluble Gums and Resins, R.L. Davidson, Editor (McGraw-Hill ", Ine, New York, NY 1980)." Due to the fact that starches with high amylose content are more difficult to gelatinize, it will also be necessary to use a higher level of chemical substitution to lower the gelatinization temperature of starches. However, the increased substitution inhibits the conversion of enzymes.

Degree of Substitution (G.S) is an indication of the amount of chemical substitution of the hydroxyl groups of a glucose unit. Each glucose unit has three reaction sites and a G.S. of 1 indicates that a site has been reacted. Chemical substituents interfere with and stop the conversion of enzyme so that they do not obtain completely converted products. The more highly substituted the starting starch material, the higher the molecular weight of the maltodextrin since there is less enzyme conversion. Granular starches that have not been pregelatinized are preferred. Granular pregelatinized starches are also useful herein. The pregelatinized granular starches are prepared by processes known in the art. Pregelatinization is carried out in such a way that a majority of the starch granules swell but remain intact. Illustrative processes for preparing pregelatinized granular starches are described in U.S. 4, 280, "851, U.S. 4,465", 702, U.S. 5,037.92 ^ 9 and U.S. 5,149,799, the descriptions of which are incorporated herein for reference. You can also use predispersants (ie pregelatinized starches) in the processes of converting single-phase enzymes with high solids content, as long as they are not soluble in cold water. They can be prepared by frying and drying by spraying. Physically modified starches, such as the thermally inhibited starches described in WO 95/04082 (Published February 9, 1995) are also suitable for use herein as long as they are also chemically modified. Enzymes suitable for use herein include bacterial, fungal, plant and animal enzymes such as endo-alpha-amylases which separate the 1-glucosidic bonds of starch, beta-amylases which renew maltose units in one form in steps of the ends non-reducing, of alpha-1, 4-l? gaduras, glucoamylases that remove glucose units in a way in steps of the non-reducing end of the starch molecules and separate both ligatures 1"^ 4 and 1" _ ^ 6 and branching enzymes such as isoamylase and pullulanase that separate the glycosidic bonds of starches containing amylopectin. Alpha-amylases or mixtures thereof with other enzymes are preferred and used to prepare the enzyme-converted starches having unique bimodal or polymodal molecular weight profiles. Enzymes can be purified by selective absorption or precipitation, but many commercial products contain significant amounts of impurities in the form of other enzymes, as well as in the form of inert proteins. For example, commercial bacterial "amylases" sometimes also contain "proteinases" (enzymes that break the protein). After extraction and partial purification, commercial enzymes are sold either as powders or as liquid concentrates. The process conditions for the use of the particular enzyme will vary and will usually be suggested by the supplier. Variables include temperature, pH, concentration of substrate solids, enzyme dose, reaction time and the presence of activators. Frequently, absolute optimal reaction conditions do not exist. The "optimal" pH can depend on the temperature; the "optimal" temperature may depend on the reaction time; The "optimal" reaction time may depend on the cost and so on. The reaction time can vary from 10 minutes to 24 hours or more, usually from 1 to 4 hours for alpha-amylase. The conditions recommended above are usually commitments. "The stability of an enzyme to adverse conditions is usually improved by the presence of its substrate.Some enzymes are also stabilized by certain salts (bacterial amylase is stabilized by calcium salts) .It is necessary to rigorously exclude heavy metals and other contaminants from enzymes such as oxidizing agents, of an enzyme reaction since these materials usually result in permanent inactivation (ie denaturation) of the enzyme, however in many cases, where the enzyme activity is reversibly reduced, frequency by the products of a reaction (inhibition of product) or by a substance that structurally refers to the usual substrate (competitive inhibition) Reversible inhibitors temporarily complex with the enzyme and therefore reduce the amount of enzyme available for the reaction. Normal - The normal enzyme reaction conditions are discussed in "Technology of Corn Wet M illing "by P.H. Blanchard, Industrial Chemistry Library, Vol. 4 (Elsevier, New York, NY 1992). Optional humectants - used herein may be any of those conventionally used to formulate adhesives. Normal humectants include sugars, glycerin sorbitol and related derivatives, propylene glycol and related similar glycols and glycol ethers. These humectants are used in the rewettable adhesive formulations at levels of approximately 0.5 to 10% by weight of the total adhesive formulation. A smaller amount of polyvinyl alcohol (approximately 0.5 to about 4% by weight) can be added to the rewettable adhesives - as a protective colloid. The polyvinyl alcohol can be a partial or fully hydrolyzed polyvinyl alcohol. A suitable polyvinyl alcohol is Airvol 203 (available from Air Products, Allentown, PA). To prepare the preferred rewettable adhesive compositions, the maltodextrin syrup can be prepared and added to ethylvinyl acetate latex and / or polyvinyl acetate latex or a dry maltodextrin (recovered from the maltodextrin syrup by spray drying or methods). similar drying) can be added directly to the x-lactate. The. Maltodextrin can also be added during the polymerization of monomers to act - as a protective colloid. . - -X "To prepare the composition" of non-rewettable adhesives, the maltodextrin syrup can be used directly or diluted to the desired solids or a dry maltodextrin syrup (recovered as discussed above) can be dispersed in "water, in solvents" such as alcohols (for example propanol), esters (for example ethyl acetate), or cycloalkenes (for example cylene) or in a water-based resin The adhesive composition is then heated and maintained at a temperature approximately 71-82 ° C (160 ° -180 ° F) with agitation for a sufficient period to fully ensure dissolution if dry maltodextrin is used.Any other adhesives to be used should be added at this point. then it is diluted with additional water, if necessary, to the desired viscosity, generally in the range of approximately 2,000 to 30,000 cps, preferably 2,000 to 20,000 even more preferably approximate. amente 6,000 cps for re-wettable adhesives. Depending on the particular end use for non-re-wettable adhesives the viscosity can vary from 500 to 200,000 cps. In the embodiment where the maltodextrin syrup or powder is not then added to the preferred resin-based re-wettable adhesives, it may be necessary to add a thickener (for example, polyacrylamide, carboxymethylcellulose, hydroxymethylcellulose, etc.) in order to obtain a viscosity within these limits. In the final preferred rewettable adhesive compositions, the maltodextrin syrup will be present in an "amount of about 10 to -85%, preferably 50% by weight of the formulation with the ethylene vinyl acetate and / or polyvinyl acetate resin ( optionally emulsified with maltodextrin) comprising from about 15% to about 40% and with the remainder being water.Another optional additives ", such as humectants, defoamers, plasticizers, preservatives, thickeners, bleaching agents, peptide salts such as magnesium chloride and sodium nitrate may also be present in the adhesive compositions in order to modify certain characteristics thereof, as long as they do not detrimentally affect adhesion or hygroscopic or thermoplastic blocking properties when the adhesive is a re-wettable adhesive. Said ingredients will generally be used in effective amounts of 5% by weight or less, usually in minor amounts of less than about 3% by weight "for rewettable adhesives, said ingredients will generally be used in effective amounts of 30% by weight or less. defoaming agent is Foamaster III (available from Henkel Chemical Co.) in an amount of about 0.01-1%. A suitable conservative is Kathon in an amount of about 0.01-0.5%. A suitable plasticizer is a dibenzoate in an amount of about 0.5-5%. Although the optional additional maltodextrin has been termed "post-added", it should be recognized that subsequent addition is only the most convenient and generally accepted method of rewettable formulation adhesives such as cover adhesives and that it is possible to add the additional maltodextrin directly. to the monomer charge before the current-polymerization.

Re-wettable adhesives in which high-solids maltodextrins are useful include bare adhesives and stamping rubber adhesives. Non-re-wettable adhesives in which high-solids maltodextrins are useful include binding adhesives, laminating adhesives, tubular matrix winder adhesives, packaging and cardboard adhesives, bag sewing adhesives. of candy, envelope and the like, stickers--. of corrugation, adhesives to produce cigars, etc. Dextrose Equivalent Test Procedures The dextrose equivalent (ED) is an indication of the degree of conversion as shown by the "reduced maltodextrin sugar content." A Fehling Volumetric Method, adapted from the Eynon-Vol. Lane # 423 from Cane Sugar Handbook for Spencer and Mead (John Wiley and Son Inc.), is used to determine the ED "A solution of starch (w / v) of known concentration is prepared on an anhydrous starch base.The usual concentration is 10 g / 200 ml.The starch solution is transferred to a 50 ml burette.To 50 ml of water distilled in a 500 ml Erlenmeyer flask was added by pipetting 5 ml each of Fehling's solutions A and B. Fehling's solution A contains 34.6 g of copper sulfate (CuS04 • 5H20) and brought to the volume in a 500 ml volumetric flask. Fehling solution B contains 173 g "of Rochelle's salt (NaKC4H4? 6- 4H20) and 50 g of sodium hydroxide dissolved in and brought to volume in a 500-ml volumetric flask Fehling's solutions are normalized against standardized dextrose obtained from the Standards Committee To determine the Feheling factor, the test procedure is followed except that 0.5000 anhydrous grams of dextrose are used per 200 ml of distilled water as the test solution. factor = 100 x ml used in dextrose xg titre / ml - 100 The factor is applied to Fehling solutions A and B and calculated for 4 tenths The contents of the flask are boiled on a hot plate The starch solution while boiling is titrated to the distinctive reddish-brown colored endpoint (precipitated cuprous oxide complex) It is required to record the ml of the starch solution. Dextrose ratio (ED) is calculated using the following formula:% ED = (Fehling factor) 100 (g / ml starch concentration x ml of starch solution) where "starch solution" is equal to the ml of The starch solution used in the titration to reach the end point and "starch concentration" is equal to the concentration of the starch solution on an anhydride basis expressed in g / ml. Gel Permeation Chromatography (GPC) The molecular weight distribution (PM) was determined using a model of Water Associates GPC-150C with a refractive index (IR) detector. Two columns of PL (105 and 103 obtained from Polymer Laboratories of Amherst, MA) formed of highly interlaced spherical polystyrene / divinylbenzene, are sequenced. The Dextrans of American Polymer Standards Corp. (Mentor, Ohio) are used as the normarles. The experimental conditions are at a column temperature of 80 ° C and a flow regime of 1 ml / min. The mobile phase is dimethyl sulfoxide (DMS) with mM sodium nitrate (NaN03). The concentration of the sample is 0.1%. The injection volume is 150 ml. Brookfield Viscometer The test samples were measured using a Brookfield viscometer Model RVT and the appropriate spindle that is selected based on the anticipated viscosity of the material. The test sample is placed in position and the spindle is lowered into the sample at the appropriate height. The viscometer is turned on and the spindle is rotated at a constant speed (for example 10 or 20 rpm) for at least 3 revolutions before a reading is taken. Using the appropriate conversion factors, the viscosity (in centipoise) of the sample is recorded Solid Content The solids content of the adhesive is determined by oven drying the adhesive at 100-110 ° C to a constant weight. " Using the following formula, the percentage of solids is calculated: Dry Adhesive Weight Adhesive Wet Weight x 100 =% Solids Establishment Speed Establishment speed is the time it takes an adhesive to form a fiber tear joint that is achieved as a result of the development of wet glue. A faster setting adhesive allows a user to operate the lines faster, accommodate compression zones at short and low pressure and produce a fiber tear union outside the line ensuring product performance. The speed of establishment depends a lot on the weight, compression, temperature and humidity of the cover. Therefore, comparisons should be made using the same method of application and the substrate under the same conditions of temperature and humidity.To test the speed of installation, two sheets of 38.1 cm (15 inches) long were cut through. 15.24 cm "(6" inches) wide 50"Kraft paper, then cuts 2.54 cm (one inch) wide and 12.7 cm (five inches) long in a 38.1 cm (15" inch) piece. of Kraft paper creating a "skirt of flee". A glass plate, longer and wider than the original paper, is placed on a clamping board and oriented horizontally with the pin to the left. The Kraft paper cut in the form of a "rip skirt" is placed on the top of the other piece of Kraft paper and both are attached to the glass fastener of the clamping board. The "escape skirt" is then folded up and back to expose the second sheet of Kraft paper. A piece of paper in strips is placed below and to the right side of the Kraft paper to catch the excess adhesive when it is removed. A fin applicator is centered on the left side of the "upper part of the lower piece of kraft paper, 4 to 6 grams of adhesive are placed in the applicator opening - The adhesive is extracted through the paper using pressure" uniform. The adhesive in excess is captured by the paper in strips The "skirt of fleece" is on top of the adhesive film and is unfolded A timer is immediately activated as the adhesive is immediately folded with the adhesive. hand to compress the joint, slowly pull the 2.54 cm (one inch) sections and record the time each section is pulled in. Examine the amount of fiber torn at each time interval. "- Record the time which is acquired 50% consistent or more fiber torn. The speed of establishment of the adhesive is the first time in which 50% or more of torn fiber is achieved. - Opening Time The opening time is the amount of time in which a film of adhesive on a substrate can remain open (ie not covered) and still form a durable bond when combined with a second substrate. An adhesive with a longer opening time will tend to work better. In other words, it will remain "wet" in the glue container, on the rollers and on the cliché pads and therefore it is less likely to accumulate and form crusts. The opening time depends a lot on the weight, temperature and humidity of the cover. Therefore, when comparing adhesives, the same application method and substrates should be used at the same temperature and humidity. The test is carried out using the above procedure to test the assembly except that one of the two pieces of Kraft paper is cut into 2.54 cm (one inch) strips and the strips are attached to the Kraft paper coated with the adhesive film with Consistent time intervals using the same procedure to compress the strips. The time in which each strip is joined is noted. A minimum of one hour s-e allows for drying. Then, starting on the left side of the Kraft paper, the 2.54 cm (one inch) strips are carefully peeled off and the strength and degree of tearing of the fiber is noted. The opening time is the first point where 50% or less of the fiber tear is scored. It may be necessary to repeat the test if the last strip has more than 5-0% of fiber tear and starts to join in the last time. Lamination Test Procedure The adhesive composition is heated to 65 ° C. A glass plate is placed under the pin of a clamping board.A sheet of cardboard material is placed between the pin and the glass plate. Strips of roofing material are cut to dimensions of 8.8 cm (3.5 inches) long, 3.8 cm (1.5 inches) wide in the machine direction.A strip of cover material is placed between the pin and the cardboard material so that the pin is placed about 0.63 cm (0.25 inches) from the top of the cover material strip, the rest of the cover material is folded again to expose the cardboard material placed under the cover material An applicator-3.8 μm (1.5 mil) fin with a 2.54 cm (one inch) gate (available from MCD Industries, Medfield, Massachusetts) is placed between the cover material and the cardboard material. hot is ap lica low - the fin applicator if the cardboard material is removed. The cover material is immediately contacted with the cardboard material and rolled once with a roller to adhere the cover material and the cardboard material. The "adhesion of the cover material to the cardboard material is evaluated the day after the extraction by pulling the material from the board-and evaluating the condition of the joint. The percentage of the joint surface showing the fiber tear is recorded. EXAMPLES - - - In the following examples, non-pregelatinized granulated starches were used unless otherwise stated - and the different enzymes described below were used. - The alpha-amylases were Ban 120 L and Termamyl. They were obtained from Novo Nordisk. Ban is a conventional alpha-amylase with an optimum temperature of approximately 70"° C, optimum pH of 6.0-6.5, an activity of 120 KNU / g and the recommended use (based on the weight of the starch) of 0.005-1.0, preferably - 0.01-0.5 Termamyl is a heat-stable alpha-amylase with an optimum temperature greater than 90 ° C, an activity of 120 KNU / g, and the recommended use (based on the weight of the starch is 0.0005-1.0, preferably 0.01 -0.5 One Kilo Novo unit (the amount of enzyme that decomposes 5.26 g of starch (Merck, Amylu Solubile, Erg. B6, Batch 994 7275) per hour in the Novo Nordisk standard The method for determining alpha-amylase using soluble starch as the substrate .0.0043 M calcium content in the solvent, 7-20 minutes at 37 ° C and pH 5.6 The mixture of alpha-amylase and glucoamylase used was Aspk 27 obtained from Daikin Kogyo, Kabushigi, Kaisha, Osaka, Shi Kibanoku, Ichome 12-39 Japan The optimal conditions are not described. of barley used was BBA 1500 which was obtained from Finnsugar Group. The optimal conditions for this enzyme are pH 5.0-7.0 and a temperature of 55-65 ° C.

It has an activity of. 1500 Dp / ml and its recommended use (based on the weight of the starch) is 0.1-2.0%, preferably 0.2-0.8%. A Degree of Dietary Power (Dp °) is the amount of enzyme contained in 0.1 ml of a 5% solution of the sample enzyme preparation that produces sufficient reducing sugars to reduce 5 ml of Fehling solution when the sample is incubated with 100 ml of sastrate for 1 hour at 20 ° C.

The aminoglucosidase (AMG 300L) is an exo-1,4-alpha-D-glucosities. The optical conditions are pH 4.5 and 60 ° C. It has an activity of 300 AGU / ml, recommended use (based on the weight of the starch) of 0.005-1.0%, preferably 0.01-0.5%. A Novo Anhydroglucosidase Unit (AGU) is defined as the amount of enzyme that hydrolyzes one micron of maltose per minute using maltose as the substrate at 25 ° C, pH 4.3 for 30 minutes .. The debranching enzyme used in Promozyme _600L (pullulanase ) which was also obtained from Novo Nordisk. It is a color-stable debranching enzyme with an optimum temperature of 60 ° C and optimum pH of 5.2. It has an activity of 200 PUN / g and the recommended use (based on the weight of the starch) is 1-15%, preferably 2-10% of PUN / g. A Unitary Noula Pullulanase (PUN) is defined as the amount of enzyme that, under normal conditions, hydrolyzes pullulan, liberates reducing carbohydrate with reducing power equivalent to one micromole of glucose per minute. Is a . concentrated form of Promozime with a concentrate activity of 600"PUN / ml EXAMPLE 1 Part A This example describes a series of enzyme conversions operated in a 37 liter (10 gallon) gate mixer reactor using Ban (B) and Termamilo (T), and their mixtures.The resulting maltodextrins were used in re-wettable adhesives.The internal dimensions of the tank were 40.54 cm (16 inches) high by 40.6 cm (16 inches) in diameter.The gate agitator, made of a 1.2 cm (* _ inch) wide by 5.8 cm (2 inches) deep stainless steel bar material had four diagonal cuts of 26.6 cm (10-inch) high, the external diagonal cuts cleared the wall of the internal tank by 1.2 cm (inch), the internal diagonal cuts were 8.2 cm (3, inches) from -the external set. Attached to the upper part of the tank were 4 breaker bars of the same bar material, located at 4.4 and 13.3 cm (1 and 51, inches) "" in from the tank wall. An electric impeller, variable from 0 to 60 rpm energized the agitator. A vent in the upper part of the tank provides a "forced" variable exhaust. The sides and bottom of the tank were lined for steam heating or cooling with water. A 1.2 cm (-inch) diameter steam injection port was provided on the side wall 2.54 cm (one inch) above the bottom of the tank. A thermocouple probe was attached to the bottom of an external breaker bar. At the bottom of the tank a 5.8 cm port was provided with a "ball valve to extract the product." For these conversions a removable metal plug was inserted into the extraction port, measured with the bottom of the tank to eliminate the possibility that a portion of the initial dry charge will receive non-uniform moisture, enzyme, or heat.For each conversion, 14.8 kg (33 pounds) of a commercially dry granulated starch was added to the tank.The enzyme load was diluted with enough water to bring the load to 25% moisture on an anhydrous basis.This water / enzyme mixture was added to the starch with mixing.The mixture, after the addition of the enzyme / water mixture was a mixture of dry starch and the wet starch , add less than 1.2 cm (one half inch) in diameter.At this point, the agitator is turned off for approximately 30 minutes to allow the enzyme solution to diffuse through the starch. After this restIt was a wet, flowable powder. The mixture was heated, generally by injection of live steam (at 32 psi) except where otherwise indicated) into the mixture and / or optionally by heating the tank jacket. Normally, the dough was mixed during heating, but this was not required. Mixing only provided heat transfer. As the granulated starch was gelatinized (or the predispersed starch insoluble in cold water was solubilized), it was converted and the reaction mixture changed from a wet powder to a moist doughy paste and then to a dispersed syrup. These changes occurred as the temperature increased from 50 ° C to 90 ° C. The temperature at which the onset of liquefaction occurred varies depending on the water content, enzyme activation temperature and type of starch. In this ventilated tank, there was some loss of moisture during the entire cycle. heating. When the injection steam was turned off, the temperature was maintained at the indicated temperature with jacket heating for 30 minutes. The batch was then cooled to less than 50 ° C and extracted. Optionally, the pH was reduced to 3.5 with phosphoric acid and the mixture kept for 30 minutes to deactivate any residual enzyme. The pH is readjusted if necessary. Part B A 43.52 parts of the indicated starch was added a mixture of 6.95, parts of water and the indicated amount of Ban and / or Termamyl I20 L. A gate mixer was at 30 rpm while the premix was added slowly in stable stream. Mixing is continued until the starch is uniformly soaked. The stirrer was turned off and the mixture was heated with live steam and steam in the jacket at 82-93 ° C (180-200 ° F) for 30 minutes. After 6.94 parts of water were added. The mixer was restarted and stirring was continued at 30 rpm while the mixture was heated to 93-99 ° C (200-210 ° F). When the adhesive product cleared and was uniform, the viscosity and solids were tested. After the test results were recorded, the pH was adjusted to 3.5 with 85% phosphoric acid, an additional acid was added if necessary, to terminate the activity of the enzyme. The base of starch used, enzyme and amount used and properties of the resulting and comparative maltodextrins (solids, ED and GS) are summarized in Table 1. The viscosity stability of three months of the same maltodextrins are reported in the Table. 2.

TABLE 1 Dextrin Solid Enzyme Starch E.D. G.S.

Waxy corn 0.045 _ 62.2 13.7 0.16 hydroxypropylated, 0.045 T 35 WF Waxy corn 0.09 t 70.9 11.0 0.16 0.16 hydroxypropylated, 35 WF Waxy corn 0.18 T 62.8 10.6 0.16 hydroxypropylated, 35 WF Waxy corn 0.09 T 68.9 13.2 0.09 hydroxypropylated, Waxy corn 0.09 T 60.2 15.2 0.02 octenilsuccínado, Waxy Maize 0.045 T 60.0 7.4 0.16 Hydroxypropylated, 0.045 T 35 WF Waxy Maize 0.09 T 69.0 13.6 0.16 Hydroxypropylated, 35 WF Maltodextrin Converted into Comparative Enzymes Waxy Corn 0.09 T 68.5 4.1 0.09 Hydroxypropylated Predispersed Wax Maize 0.045 T Paste 13.6 0.045 T Waxy Maize 0.09 T 65.0 18.7 Waxy Maize 0.09 T 71.0 22.2 0.04 Cationic Tapioca 0.09 T 56.9 6.9 Maltodextrin 67.0 10 Waxy Maize Commercial Maitodextrin 70 8.0 0.09 Commercial Waxy Maize Hydroxypropylated For Example No. 1, the vapor pressure was 8 psi. For Example No. 6, the addition of the enzyme was carried out in two stages. TABLE 2 Characteristics of Viscosity Aging of Converted Maltodextrins to Suitable Enzymes Starch Maltodextrins, Solids, ED G.S. Viscosity in 3 months (cps) Waxy corn 62.2 13.7 0.16 transparent, flowable hydroxypropyl, > 50,000 35 WF Waxy corn 70.9 11.0 0.16 transparent, flowable hydroxypropylated, > 50,000 35 WF Waxy corn 62.8 10.6 0.16 transparent, hydroxypropylated flowable, > 50,000 35 WF Waxy corn 68.9 13.2 0.09 transparent, hydroxypropylated flowable, > 50,000 Waxy corn 60.2 15.2 0.02 fuinable, octenylsuccinated, opaque paste Waxy corn 60.0 7.4 0.16 transparent, flowable hydroxypropyl, > 50,000 35 WF Waxy corn 69.0 13.6 0.16 transparent, hydroxypropylated flowable, > 50,000 WF Characteristics of Maltodextrin Viscosity Aging Converted to Comparative Enzymes Waxy Maize 68.5 4.1 0.09 transparent paste Hydroxypropylated Predispersed WF Waxy Corn Paste 13.6 opaque gel Waxy Corn 65.0 18.7 transparent 2750 Waxy Maize 71.0 22.2 0.04 clear, flowable Cationic * > 50,000 Tapioca 56.9 6.9 opaque gel Maltodextrin 67.0 10 Commercial Waxy Corn Maltodextrin 70.0 8.0 0.09 Transparent, Flowable Waxy Corn > 50,000 Commercial Hydroxypropylated EXAMPLE 2 This example shows the preparation of rewettable adhesives using maltodextrins with high content of. solids of Example 1. To the hot maltodextrin syrups of the part A 18.-29 parts were added to each ethylene vinyl acetate and polyvinyl acetate together with 0.3 parts of a defoamer. The mixing is continued during cooling. When the temperature is below 60 ° C (140 ° F), the following ingredients were added: Carbowax 2.96, 1.98 parts of propylene glycol, 0.20 parts of additional defoamer and 0.15 parts of a preservative. The aging and Brookfield viscosity curl were tested for the different maltodextrin syrups used in the previous formulation. A control sample is also prepared using a canario-normal waxy corn pyrodextrin that is 100% soluble. The comparative maltodextrins prepared by the single-phase process with high solids content were also prepared and included in the above adhesive formulation. The comparative maltodextrins were not chemically derivatized, had a very high or very low degree of substitution, or had a very high and very low dextrose equivalent.

A maltodextrin converged to comparative enzyme, without chemical modification, prepared by the conventional enzyme suspension process, which had a polymodal molecular weight distribution was also used in the formulation of adhesives. The results are shown in Table 3 and 4.

TABLE 3 Characteristics of Viscosity Aging of Adhesives Maltodextrins Converted to Adequate Enzymes Adhesive Viscosity (cps) No. Starch Solids E.D. G.S. Initial Dextrin 7 Days 160 Days Control Pirodextrin 4-5 16,500 16,000 17,000 2 Waxy corn 1 1.0 0.16 70.9 10.420 9530 4150 hydroxypropylated, 35 WF 3 Waxy corn 10.6 0.16 62.8 3720 3760 13,000 hydroxypropylated, 35 WF 4 Waxy corn 13.2 0.09 68.9 5900 5290 5000 hydroxypropyl, Waxy corn 15.2 0.02 60.2 5000 6120 6850 - octenylsuccinate , Waxy corn 7 4 0.16 61.0 7500 7300 54,400 hydroxypropyl, 35 WF Waxy corn 13.6 0.16 69.0 2340 3700 hydroxypropylated, 35 WF Maltodextrin Converted into Comparative Enzymes Waxy Maize 4.1 0.09 59.4 16,500 16,680 > 200,000 Hydroxypropylated Predispersed WF 9 Waxy Corn 13.6 65.0 12,600 Pasta Pasta Waxy Corn 18.7 65.0 2170 2090 2900 11 Waxy Corn 22.2 0.04 66.0 5320 5020 7350 Cationic * 12 Tapioca 6.9 -60 Pasta Pasta Pasta 13 Maltodextrin 10 67.0 10,400 Paste Waxy Corn Paste Commercial 14 Maltodextrin 8.0 0.09 67.2 35,600 45,200 > 50,000 @ 90 Waxy Maize days Hydroxypropylated Commercial TABLE 4 Ripment Test of Adhesives Maltodextrins Converted to Adequate Enzymes 50% of 12% Moisture Moisture Relative Relative Solids No. Starch E.D. G.S. Adhesive, (dupl.) (Dupl.) Control P? Rodextrin 4-5 - 68.4 70 ° 60 ° 127 ° 109 ° 2 Waxy corn 11.0 0.16 60.0 43 ° 43 ° 91 ° 92 ° hydroxypropylated, 35 WF 3 Waxy corn 10.6 0.16 64.2 39 ° 39"73 ° 73 ° hydroxypropylated, 35 WF 4 Waxy corn 13.2 0.09 60.0 45 ° 46 ° 94 ° 102 ° hydroxypropylated, 5 Waxy corn 15.2 0.02 59.1 37 ° 53 ° 73 ° 94 ° octenylsuccinate, 6 Waxy corn 7.4 0.16 61.0 34"34 ° 63 ° 66 ° hydroxypropylated, 35 WF 7 Waxy maize '13.6 0.16 31X26 ° 66 ° 58 ° hydroxypropylated, 35 WF Maltodextrin Converted to Comparative Enzymes 8 Waxy Maize 4.1 0.09 59.4 65 ° 61 ° 129 ° 125c Hydroxypropylated Predispersed WF 9 Waxy Maize 13.6 - 65.0 Unripeed Pasta 10 Waxy Maize .18.7 - 65.0 37 ° 24 ° 58 ° 39 ° 11 Waxy Maize 22.2 0.04 66.0 21"32 ° 44 ° 56 ° Cationic * 12 Tapioca 6.9 - -60 Non-run dough Maltodextrin of 13 Waxy Maize 10 - 67.0 Non-commercially produced pasta Maltodextrin 14 of Waxy Corn 8.0 0.09 67.2 33 ° 14 ° 102 ° 59 ° Commercial Hydroxypropylated Control Discussion - The control is a conventional envelope adhesive based on a waxy corn pyrodextrin.It shows an acceptable viscosity and good viscosity stability over time.It shows an undesirably high rip angle to 50% - and 12% relative humidity. Discussion of Appropriate Maltodextrins Samples 1, 2, 3 and 4 show good initial adhesive viscosity and good viscosity stability over time. In sample 2 a lower increase in viscosity is observed due to the maltodextrin syrup with higher solids content. The use of mixed alpha-amylases in sample 1 observed no significant difference in the resulting adhesive. The use of a higher level of enzyme in sample 3 does not cause a significant difference in the resulting adhesive. In sample 4 it is observed that the use of an unconverted starch and a starch having a lower degree of substitution does not have a significant effect on the resulting adhesive. Sample 5 illustrates the use of another chemically derivatized starch having a lower degree of substitution. The resulting adhesive is acceptable except for the long term viscosity stability, probably due to the low degree of substitution. This shows the use of a stable maltodextrin syrup without viscosity in these adhesives.

Sample 6 was made with a divided addition of the enzyme, 1/2 in the powder, 1/2 after the temperature of the mixture reached 90 ° C. The resulting syrup becomes less but still shows acceptable adhesive properties. Sample 7 has a higher solid content compared to samples 1 and 3 but the resulting adhesives show no significant differences. Samples 2, 3, 4, 5 and 7 are examples of the preferred maltodextrins. They show acceptable viscosity and good viscosity stability, as well as reduced pleating compared to the control. Discussion of Comparative Examples In sample 8 the use of an insufficient conversion maltodextrin syrup is observed, that is, E.D. less than 5. The resulting adhesive is unacceptable in long-term viscosity stability and has unacceptable curl. Samples 9 and 10 show the use of non-chemically modified maltodextrins with dextrose equivalents on the claimed scale. Sample 10 with E.D. superior produces a stable adhesive to the viscosity _ with tearing of surface fiber. Sample 9 with E.D. lower gives an adhesive that gels in less than seven days.

A highly converted modified maltodextrin E.D. 22, Sample 11, gives a viscosity-stable low viscosity adhesive with surface fiber tearing. Sample 12, an unmodified tapioca, gives an adhesive formula that gels in less than 24 hours. The adhesive formulated with commercial waxy malt maltodextrin (Sample 13) that had an E.D. of 10 and a polymodal molecular weight distribution showed unacceptable viscosity stability. Commercial waxy corn maltodextrin that has an E.D. of 10 was reacted with propylene oxide at a G.S. of 0.09 after which he had an E.D. from 8.0. Then it was formulated in an adhesive (Sample 14); showed unacceptable viscosity stability. "Adhesion Test The adhesion test of the formulated adhesives that did not gel was carried out by determining the percentage of fiber stripping on white woven paper with a substantial weight of 24. All adhesives gave 100% fiber ripping. comparatives such as pyrodextrin control, however, gave tear of surface fibers, while adhesives containing adequate maltodextrin (ie ED between 5 and 19, GS> 0.01 and <0.50, and molecular weight distribution) polymodal) gave rips of deep fibers.

EXAMPLE 3 This examples shows the use of a fully converted waxy hydroxypropylated (PO) corn and a partially converted unmodified waxy corn prepared by the single-phase enzyme conversion process, with the solids content in a corrugating adhesive with and without added caustic soda The fully solubilized adhesives were compared with Stein-Hall type control (carrier starch dispersed with caustic with suspended raw starches) At ambient temperature, the waxy corn PO converted with 61% solids and the waxy corn converted with 71% solids had viscosities of 3000 cps and> 20,000 cps, respectively, when they were contained in a boiling water bath, the materials thinned considerably at 182.2 ° C (200 ° F), converted waxy corn PO. at 61% solids it had a viscosity in 45 seconds measured in the Stein-Hall cup, to maintain a high solids level and to move the visco When the adhesive was released to normal levels, the materials were heated before being poured into the glue tray. Waxy corn PO, with 61% solids was evaluated in the corrugator using a normal space graduation of 0.03 cm (0.012 inches), the adhesive was not able to supply the single mesh at a speed of 15"m / h ( 50 ft./min.) When the cardboard was analyzed immediately outside the corrugator, there was no evidence of fiber tearing.It seems that the adhesive did not penetrate the paper. Caustic soda was added to the adhesive to increase the alkalinity and improve the penetration of adhesive into the paper. At 0.5% on the mass of the adhesive, the caustic soda made a significant difference and the adhesive was operated at 52.5 m / h (175 ft / min). Waxy maize converted partially dispersed to 71% was maintained at 88 ° C (190 ° F). Even at that temperature, the viscosity was about 2000 cps. To thin the adhesive and add penetration, 0.5% caustic soda was added based on the total mass. In a space of 0.03 centimeters (0.012 inches), the adhesive was able to produce a single-wax mesh at speeds of 75.0 m / h (250 ft / m, in). The cardboard was also produced at a higher speed of 135 m / h (450 ft / min). To compare this adhesive with Stein Hall adhesives, runs of 75 m / h (250 ft / min) were completed to graduations of 0.02, 0.03 and 0.05 cm (0.008, 0.014 and ~ 0.02-inch) spaces. Bond strength against adhesive was determined using the ICD method for perforation resistance analysis and the ICD enzyme test for collection. All experimental adhesives were maintained between 66 and 93 ° C (150 ° F and 200 ° F). The specifications for operations are shown below. No. 1 Material: waxy P.O. completely dispersed with 63% solids Speed: 15m / h (50 feet / min) Caustic: none Space: 0.03 cm (0.012 inches) Compilation: 0.72 kg (1.6 lb / MSF) Union: 9.3 kg / m 3.1 Ib / linear foot ) NNoo .. 22 MMaatteerriiaall :: waxy PO completely dispersed with 6, 3% solids Speed: 52.5m / h (175 feet / min) Caustic: 0.5% on total adhesive Space: 0.03 cm (0.012"inches) RReeccooppiillaacciióónn :: 0.72 kg / MSF (1.6 lb / MSF) Union: 6.02 kg / m 4.3 lb / linear foot) No. 3 Material: unmodified waxy partially dispersed with 71% solids Speed: 75m / h (250-ft / min) CCááuussttiiccaa :: 0.5% on total adhesive Space: 0.02 cm (0.008 inches ) Compilation; 0.63 kg / MSF (1.4 lb / MSF) Union: 14.4 kg / m (10.3 Ib / linear foot) No. 4 Material: unmodified, partially dispersed oil "with 71% solids Speed: 75m / h (250 ft / min) Caustic: 0.5% on total adhesive Space: 0.03 cm (0.014 inch) Compilation: 2.2 kg / MSF (5.0 lb / MSF) Union: 33.6 kg / m (28.0 lb / linear foot) No. 5 Material: unmodified waxy partially dispersed with 71% solids Speed: 75m / h (250pies / min) Caustic: 0.5% on total adhesive Space: 0.05 cm (0.020 inches) Compilation: 4.4 kg / MSF (9.9 lb / MSF) Union: 45.5 kg / m (32.5 lb / linear foot) A major weakness of both adhesives was the final bond strength given the adhesive collection.An acceptable bond strength is considered to be 70 kg / m (50 lb. ft./ft). Even with 4.45 kg / MSF (9.9 lb / FSF), the waxy maize converted with 71% better performing solids was unable to surpass the minimum normal.In the same paper, a Stein- Hall is able to achieve a joint strength of 70 kg / m_ (50 lb / ft. Linear) using 6.6 kg / MSF - (1.5 lb / MSF). The cardboard produced by the waxy corn P.O. converted from 63% solids virtually had no fiber rips. There was a maximum of fiber tear - of 25% even for the superior wax collection with "71% solids." The partially converted material probably had some higher molecular weight polymer chains ~ which could be the reason for the bond strengths EXAMPLE 4 This example describes the preparation of a flat lamination adhesive.To a clean dry tank were added 100 parts of a waxy corn of octenyl succinate (GS 0.02) followed by a premix of 31 parts of water and 0.2 parts of water. Termamylo The mixing at 20 rpm was carried out by the premix which was added in a slow steam at rest. Mixing is continued until the mixture is uniformly dampened and then the agitator is turned off. The mixture was heated with live steam and steam in the skirt at 93.3 ° C (200 ° C) for 60 minutes or until the liquid formed uniformly around the tank and in the steam lines. The temperature was maintained at 93.3 ° C (200 ° F) while mixing at 30 rpm. When the product lightens and is uniform, the viscosity and solids are tested. After the test results are recorded, then the pH was adjusted to 3.5 with additional acid to terminate the activity of the enzyme. The heat was turned off and 10 parts of sodium nitrate were added. The mixture was cooled to 48.9 ° C (120 ° F) and 0.30 parts of defoamer, 11 parts of magnesium chloride hexahydrate, 13 parts of calcium chloride and 0.15 parts of a preservative were added. The resulting maltodextrin with high solids content should have a E.D. of about 10 and a total solids content of about 70%. The Brookfield viscosity was adjusted to 2000-5000 cps by adding water. The adhesive is expected to demonstrate excellent flatness, high solids content, good adhesion and superior stability. EXAMPLE 5 This example describes the preparation of a sealing adhesive for book and cardboard covers. ~~ Using the procedure described in Example 4, a cationic waxy corn starch containing diethylamino groups (G.S. 0.04) is converted using 0.2% Termamyl. The resulting maltodextrin with high solids content should have an ED of about 18 and a solids content of about 70%. The Brookfield viscosity was adjusted to 500-5000 cps by dilution with water.This adhesive is designed for fast drying, high tack and excellent adhesion EXAMPLE 6 This example describes the preparation of a candy bag adhesive using the described procedure in Example 4, a hydroxypropylated waxy corn (GS0.09) was converted using Termamyl.The resulting maltodextrin should have an ED of about 10 and a solids content of about 67% .The bad odextrin was diluted to a Brookfield viscosity. 1500-5000 The adhesive should produce faster setting, higher solid content of stronger adhesion as well as minimal weakening compared to a normal bag adhesive EXAMPLE 7 This example describes the preparation of tube winding adhesive using the procedure described in Example 4, a waxy maize of hydroxypropylated fluidity (WF 35, GS 0.16) was converted using 0.2% of Termamyl The resulting malXodextrin should have an E.D. of about 15 and a solids content of about 68%. The Brookfield viscosity was adjusted to 20110-10,000 cps by dilution with water. This adhesive is designed for superior tack and very fast fixing speed with minimal roughness and excellent adhesion. "" EXAMPLE 8 This example describes the preparation of an envelope seam adhesive. Using the procedure described in the Example 4, the corn starch was converted using 0.2"% of Termamyl.The resulting maltodextrin should have an E.D. of about 15, - and a solids content of about 7-0% .-- Fifteen parts of sodium nitrate, 12 parts of magnesium hexahydride and 8 parts of urea were added and the Brookfield viscosity was adjusted to 200. -8000 cps by "dilution with water." The adhesive should demonstrate high sign resistance due to high solids, excellent rheology for clean machining, good adhesion, and light color that will eliminate staining of paper "seams. "" EXAMPLE 9 This example describes the preparation of a label wrap adhesive. Using the procedure described in Example 4, the waxy corn starch is converted to enzyme using 0.2% Termamyl. The resulting maltodextrin must have an E.D. of about 18 and a solids content of about 70%. Ten parts of sodium nitrate, 15 parts of urea, 10 parts of magnesium chloride hexahydrate are added and the Brookfield viscosity is adjusted to 10,000-1,000,000 cps (which depends on the machine that will be used) using water as the diluent. It is expected that this adhesive produces less wrinkles in the paper, that it has high tack, good adhesion and light color.

EXAMPLE 10 This example describes the use of a hydroxypropylated waxy maize starch completely converted as adhesives to produce cigars in the three binding applications, ie, cigarette paper, for itself, for side seam, glue the paper to itself and vascular the paper to the cigar - of paper to imitate the unions of gluing. A hydroxypropylated waxy corn (G.S. 0.16) is converted with 0.2% Termamyl using a procedure of Example 4. The resulting maltodextrin should have a E.D. of about 15 and a solids content of about 62% (see Table 1, Sample 1). The maltodextrin was diluted with enough water to give an adhesive having a Brookfield viscosity of about 3000 cps. The viscosity stability at room temperature and adhesion characteristics are expected to be as good as the adhesives of Example 1. EXAMPLE 11 This Example shows the use of a maltodextrin-based adhesive as a book-wrapping adhesive where it is successfully replaced. Normally used animal glue.

ParteXA - Adhesive Preparation A flowable waxy corn (35 WF) was reacted with sufficient propylene oxide to give a G.S. of approximately 0.16. Then it was further converted into the 37 liter gate mixer reactor previously described using 0.2% of thermamyl. For conversion, "14.85 kg of commercially dry, converted hydroxypropylated granulated starch, above, was added to the tank.The load of the enzyme was diluted with enough water to bring the load to 25% moisture on an anhydrous basis. Enzyme was added to the starch with mixing.The mixture, after the addition of the enzyme / water mixture, was a mixture of dry starch and the wet starch added "less than 1.27 cm (one-half inch) in diameter. At this point, the agitator was turned off for about 30 minutes to allow the water to diffuse through the starch. The starch, after this rest, was a wet flowable powder. The mixture was heated by injection of live steam at 2.24 kg / cm2 (32 psi) into the mixture. The dough was mixed during the heating, but this mixing was not required since the mixing only improved the heat transfer. As the granulated starch was gelatinized, it was converted and the reaction mixture changed from a wet powder to a moist doughy paste and then to a dispersed syrup. This change occurred as the temperature increased from 50 ° C to 90 ° C (123-195 ° F). In this ventilated tank, there was some loss of moisture during the entire heating cycle. When the steam of. injection was "turned off, the temperature was maintained at 90-95 ° C or jacket heating for 30 minutes." The batch was then cooled to less than 65.6 ° C (150 ° F) and extracted.The solids content was approximately 71% and the ED that was not recorded should be approximately 11.0 The Brookfield viscosity of the adhesive - "maltodextrin with 71% solids was 318,000 cps" at room temperature and 12,500 cps at 65.6 ° C (150 ° F) Part B Use of Adhesive The adhesive was coated on a surface of the substrates as a film of 38.1 M (65.6 mil) at 65.6 ° C (150 ° F), the Kraft speed and turning time at 65 6 ° C (150 ° F) were 20 and 50 seconds, respectively.The control of animal glue (solids content of 67.8%) had a Brookfield viscosity at 65.6 ° C (150 ° F) of 1650 cps and a Kraft speed and time of opening of -65.6 ° C (150 ° F) of 25 and 120 seconds, respectively The adhesion was 25% of fiber tearing for the adhesive e maltodextrin against 100% fiber tearing for animal glue when the substrates were hemp / cardboard composition and 100% "tear" of fiber (surface) when the substrates were laminated paper maltodextrin / cardboard composition was something surface due to the high viscosity of the adhesive. Part C - Use of Diluted Adhesive The previous bad odextrin syrup was diluted to improve the opening time. Adhesive A was diluted with water. Adhesive B was diluted with a combination of water and glycerol. The adhesive was coated at 38.1 mm (1.5 mil) on the hemp or the satin paper. The above substrates, composition and the properties of the resulting adhesives are shown below. Adhesive A Adhesive B Maltodextrin syrup 200 g 200g Water 20g 10 g Glycerol 20g Solids 68% 68% Brookfield viscosity at room temperature (cps) 32,800 28,200 Kraft speed (sec) 20 40 Opening time (sec) 40 130 Adhesion 100% 100% Hemp / Cardboard composition ~ 100% 100% Glossy paper / Cardboard Composition 100% "100Í The results show that the adhesive that contains the water and glycerol had such a good opening time with the control of animal glue (130 seconds against 120 seconds) for control but that Kraft's speed increased (40 seconds versus 25 seconds for control) .The adhesion was as good as The control of animal glue for both substrates Adhesive A had an opening time of 40 seconds due to its high solids content and high viscosity, however, the opening time can be increased by diluting the adhesive with water that will not have a detrimental effect on the other properties Now that the preferred embodiments of the invention have been described in detail, various modifications and improvements thereto will become readily apparent to the former. Experts in the technique. Accordingly, the spirit and scope of the present invention will be limited only by the appended claims and not by the following specification.

Claims (26)

1. CLAIMS 1. A high solids re-wettable adhesive characterized in that it consists essentially of: a) at least about 50% by weight of a maltodextrin syrup having a solids content between about 60 to 80% by weight and water of about 40 to about 20% by weight which is prepared from a chemically converted or an unconverted derivatized starch having an amylose content of 40% or less; whose maltodextrin has (i) substituents in an amount sufficient to provide a degree of substitution greater than about 0.01 and less than about 0.50, (ii) a reduction sugar content between about 5 and about 19 dextrose equivalents, and (iii) a polymodal molecular weight distribution having a peak between about 630 to about 1600 daltons and at least one other peak between about 1600 and about -2,500,000 daltons b) from 0 to about 50% in "weight" of water, and c) an effective amount based on the weight of the maltodextrin syrup in the rewettable adhesive of a preservative, a humectant, a defoamer, a plasticizer and / or a peptidizing salt. The adhesive according to claim 1, characterized in that the starch is a waxy starch, a corn starch, a tapioca starch, a wheat starch, a rice starch or a potato starch, wherein the maltodextrin contains ether and / or ester substituent groups; wherein the solids content of the "maltodextrin syrup is about 60% about 75"% of the water content of the maltodextrin syrup which is about 40% to about 25% and wherein the amount of maltodextrin syrup in the adhesive it is about 70% to less than 100%. 3. The adhesive in accordance with the claim 2, characterized in that the starch is the waxy starch; wherein the ether and / or ester substituent groups are nonionic, anionic and / or cationic groups; wherein the degree of substitution is between 0.05 and less than about 0.17, where other peaks are between about 1600 and about 160,000 daltons; wherein the solids content of the maltodextrin syrup is from about 65 to about 75% and the water content of the maltodextrin syrup is from about 35 to about 25% and wherein the amount of maltodextrin syrup in the adhesive is about 70% to approximately 90%. "4. The adhesive in accordance with the claim 3, characterized in that the starch is waxy corn starch "wherein the ether substituents are hydroxypropyl, 3- (trimethylammonium) -2-hydroxypropyl, or N, N-diethylamino-ethyl, or ether groups; ester groups are groups of succinate, octenylsuccinate, acetate or phosphate 5. A rewettable adhesive consisting essentially of (a) a dextrin maltodextrin syrup that is prepared by a process comprising the steps of (i) reacting an unconverted granulated starch or converted having an amylose content of 40% or less with a sufficient amount of a chemical derivatizing reagent to produce a granular derivatized starch having a degree of substitution greater than about 0.01 and less than about 0.50, (ii) adding to the Derivatized starch granular water and an effective amount of an enzyme that separates the ligatures 1 - * 4 or 1 -> 6 or both the ligatures 1-3 and 1 ^ 6 of the alm-idón or a mixture of the enzymes s, the water being added to the starch and the enzymes in an amount sufficient to produce a powder mixture without a visible free water phase, (iii) activate the enzymes and (iv) allowing the enzymes to hydrolyze and liquefy the starch to a maltodextrin syrup and the maltodextrin has a solids content of about 60 to about 80% and a water content of about 40 to about 20% by weight, one equivalent dextrose from about 5 to about 19 and (b) an effective amount based on the weight of the maltodextrin syrup - in the rewettable adhesive of a preservative, a humectant, a defoamer, a plasticizer and / or a peptidizing salt. 6. The adhesive in accordance with the claim5, further characterized in that it comprises step (v) of inactivating the enzymes and wherein the enzyme is an alpha-amylase, a beta-amylase, an amyloglucosidase, an isoamylase or a polyulanase. 7. The adhesive in accordance with the claim 6, further characterized in that the starch is a waxy starch, a corn starch, a tapioca starch, a wheat starch, a rice starch or a potato starch; in "wherein the derivatized starch contains nonionic, anionic or cationic ether and / or ester substituent groups, wherein the degree of substitution is between about 0.05 and about 0.17, wherein the maltodextrin has the dextrose equivalent of between about 10 and about 17, wherein the solids content of the maltodextrin syrup is from about 65 to about 75% and the water content of the maltodextrin syrup is from about 35 to about 25%, and wherein the enzyme is alpha-amylase or the mixture of alpha-amylose "and beta-amylase. 8. The adhesive in accordance with the claim 7, further characterized in that the starch is the waxy starch; wherein the ether groups are hydroxypropyl groups, 3- (trimethylammonium ") -2-hydroxypropyl, or N, N-diethylaminoethyl, and wherein the ester groups are succinate, octenylsuccinate, acetate or phosphate 9. A rewettable adhesive based in resin characterized in that it consists essentially of: a) about 15 to about 90% by weight of a resin selected from the group consisting of polyvinyl ac-etate, ethylene vinyl acetate and mixtures thereof, b) about 10 to about 85% by weight of a maltodextrin syrup having a solids content between about 60 to about 80% by weight and a water content of about 40 to about 20% by weight which is prepared from a chemically converted or non-converted derivatized starch which has an amylose content of 40% or less, whose maltodextrin has "(i) substituents in an amount sufficient to provide a degree of substitution greater than about 0.01 and less than about 0.50, (ii) a "reducing sugar content of between about 5 and about 19 equivalents of -d-extrosa and a polymodal molecular weight distribution having a peak between about 630 to about 1600 daltons and per at least another peak between approximately 1,600 and 2,500,000 daltons; c) from O to approximately 75% by weight of water. The adhesive according to claim 9, further characterized in that the starch is a corn starch, a zircon starch, a tapioca starch, a wheat starch, a rice starch, or a potato starch; where the - substitutes are nonionic, anionic or cationic ether and / or ester groups, wherein the amount of polyvinyl acetate, ethylene vinyl acetate or the mixture thereof in the adhesive is from about 15 to about 40. %, and wherein the amount of maltodextrin syrup in the adhesive is about 50% 11. The adhesive according to claim 10, further characterized in that the starch is waxy corn starch, wherein the ether groups are the hydroxypropyl, 3- (trimethylammonio) -2-hydroxypropyl, or N, -diethylaminoethyl groups, wherein the ester groups are succinate, octenylsuccinate, acetate, or phosphate groups; wherein the maltodextrin has "a degree of substitution between about 0.05 and about 0.17, wherein the equivalent of dextrose is between about 10 and about 17, where the other peaks are" between 1600 and about 160,000 daltons "and where the solids content of the maltodextrin syrup is from about 65 to about 75% and the water content of the maltodextrin syrup is from about 35 to about 25%. 12. The adhesive according to claim 11, further characterized in that the polyvinyl acetate and ethylene vinyl acetate are used in equal amounts. 13. The adhesive according to claim 9, characterized in that it consists essentially of an effective amount of a preservative, a humectant, a defoamer and a plasticizer, a rheology modifier and / or a peptidizing salt. 1 . A resin-based re-wettable adhesive characterized in that it comprises (a) from about 15 to about 90% by weight of a resin selected from the group consisting of a polyvinyl acetate, ethylene vinyl acetate and mixtures thereof, (b) of 0 to about 75% water and (c) from about 10 to about 85% by weight of a maltodextrin dextrin syrup that is prepared by a process comprising the steps of (i) reacting a non-converted or converted granulated starch which has an amylose content of 40% or less with a sufficient amount of a chemical derivatizing reagent to produce a granular derivatized starch which has a higher degree of substitution-- than about 0.01 and less than about 0.50"(ii) add to the derivatized starch granulated water and an effective amount of an enzyme that separates the ligatures 1®4 or 1 ®6 or both the 1 ®4 and 1 ®6 of the starch or mixtures of said enzymes, the water added in an amount sufficient to produce a powder mixture without a visible free water phase; (iii) activating the enzymes; and (iv) allowing the enzymes to hydrolyze and liquify the starch into a maltodextrin syrup having a solids content of about 60 to about 80% by weight and a water content of about 40 to about 20. % by weight with the maltodextrin having a dextrose equivalent of from about 5 to about 19. The adhesive according to claim 14, characterized in that the process further comprises step (v) of inactivating the enzymes and wherein the enzyme is an alpha-amylase, a beta-amylase, an amyloglucosidase, an isoamylase or a polyulanase. 16. The adhesive according to "" claim 15, further characterized in that the ethylene vinyl acetate resin or polyvinyl acetate latex resin is emulsified during the polymerization of monomers with part of the maltodextrin syrup as a protective colloid; wherein the starch is a corn starch, a waxy starch, a tapioca starch, a wheat starch, a rice starch, or a potato starch; and where the enzyme is alpha-amylase or the mixture of alpha-amylase and beta-amylase. 17. The rewettable adhesive according to claim 16, characterized in that the amount of maltodextrin syrup added subsequently is about 50%. 18. The adhesive according to claim 17, further characterized in that the maltodextrin syrup contains less than about 1% by weight of granulated starch not pregelatinized or partially gelatinized 19. A non-rewettable adhesive characterized by consists essentially of: a) at least about 50% by weight of a maltodextrin syrup having a solids content between about 60 and about 80% by weight and a water content of about 40% to about 20% by weight and "which is prepared" a converted or unconverted starch and whose maltodextrin has a reducing sugar content of between about 5 and about 19 equivalents of dextrose, b) from 0 to about 50% by weight of water, and c) an effective amount based on weight syrup of »maltodextrin in the non-re-wettable adhesive, of a preservative, a humectant, a defoamer, a plasticizer and / or a peptidizing salt. The adhesive according to claim 19, further characterized in that the starch is a waxy starch, a corn starch, a tapioca starch, a wheat starch, a rice starch, a potato starch or a high starch amylose content; and wherein the solids content of the maltodextrin syrup is from about 60 to about 75% and the water content of the maltodextrin syrup is from about 40 to about 25%. 21. The adhesive according to claim 20, further characterized in that the starch is waxy corn starch; wherein the solids content of the maltodextrin syrup is from about 65 to about 75% and the water content of the maltodextrin syrup is from about 35 to about 25% and wherein the amount of maltodextrin syrup in the adhesive is about 70% 22. The adhesive according to claim 19, further characterized in that the starch is a waxy starch, a corn starch, a tapioca starch, a wheat starch, a rice starch, or a high amylose starch; and wherein the starch contains nonionic, anionic or cationic ether and / or ester substituent groups. 23 X The adhesive according to claim 22, further characterized in that the starch is waxy maize starch, wherein the ether groups are hydroxypropyl, 3- (trimethylammonium) -2-hydroxypropyl or N, -diethylaminoethyl groups; and wherein the ester groups are succinate, octenylsuccinate, acetate or phosphate 24. A non-rewettable adhesive characterized in that it consists essentially of (a) a maltodextrin dextrin syrup which is prepared by a process comprising the steps of ) add to a granulated starch, converted, not converted to water and an effective amount of an enzyme that separates the ligatures 1®4 or 1 © 6, or both the 1®4 and 1®6 of the starch or a mixture of the enzymes, the water being added to starch and enzymes "in an amount sufficient to produce a powder mixture without a visible free water phase, (ii) activate the enzymes and (iii) allow the enzyme to hydrolyze and liquefy the starch to a maltodextrin syrup that has a solids content of about 60 to about 80% and a water content of from about 40 to about 20%, maltodextrin having an ED of about -5 to about 19; and (b) an effective amount based on the weight of the maltodextrin syrup in the non-rewettable adhesive of a preservative, a humectant, a defoamer, a plasticizer and / or a peptidizing salt. 25. The adhesive according to claim 24, characterized in that the starch is a waxy starch, a corn starch, a tapioca starch, a wheat starch, a rice starch, a potato starch, a starch with high content of amylose; wherein the starch is derivatized and contains nonionic, anionic substituent groups? "ether and / or ester cationic and the degree of substitution is between about 0.05 and about 0.17, wherein the maltodextrin has the dextrose equivalent between about 10 and about 17, wherein 1 solids content of the maltodextrin syrup is about 60 to about 75% and the water content of the maltodextrin syrup is from about 40 to about 25% and wherein the enzyme is an alpha-amylase, a beta-amylase, an amyloglucosidase, an isoamylase s a polulanase. The adhesive according to claim 25, further characterized in that the maize is a waxy corn starch, wherein the ether groups are hydroxyalkyl, 3- (trimethylammonium) -2-hydroxypropyl or N, N-diethylaminoethyl groups; the ester groups are succinate, octenylsuccinate, acetone or phosphate wherein the enzyme is alpha-amylase or the mixture of alpha-amylase and beta-amylase and wherein the solids content of the Maltodextrin syrup is from about -65 to about 75% and the water content of the maltodextrin syrup is from about 35 to about 25%.