DE1567357A1 - Process for the production of hydrolysates of starch or flour - Google Patents

Description

Le Yi6UX Logis, Place Joyalβ Yineuil St. Firmin (Pia ·). trance

Process for the production of τοη hydrolytes τοη starch or flour '

The invention relates to the production of starch or mineral hydrolyzates with a high adhesive effect, in particular for the adhesive industry.

To date, most of the dextrins used in this industry have been used and soluble starches on dry food, especially by roasting made of starch or flour in oven or heat. However, this production is relatively expensive

The production of these products through hydrolysis was aLe chemically or enzymatioch - is much more economical "BLihar Icotinbe one but less to kowtow ancestors only Darlvata concentration *» / Lm general, about Q r> not UbnriuihrLttnn - "hörabellen,

do 8 art / 0-2 a 8

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This concentration is not for the adhesive industry Interesting.

This is indeed evident above the concentration mentioned Phenomenon known as rapid gelling, which is a consequence of secondary, irreversible reactions. Through this the products for the adhesive industry become unusable · This is also the reason that one is with regard to others Applications hydrolysis in an advanced ' Stage is used in order to obtain liquid, stable mixtures that have practically no adhesive effect and which are particularly suitable for the Squeezing the paper can be used.

The invention provides a manufacturing method by enmymatic Hydrolysis of derivatives of starch and flour before that at higher levels Concentrations are stable - they can reach about 60 Gewiohts-jt - and which also brings the economic advantage of the process in a moist way. The invention ensures that products of greater viscosity and greater adhesive strength are obtained than they have those obtained by the known Processes are obtained in a moist way and which are so excellently suited for the glue industry

The method according to the invention is characterized in that the hydrolysis is carried out by a common enzyme, preferably of the type Amylaee, in the presence of at least one agent that complexes and the GsIbLLLdung acts preventing, is effected.

Dtiii. ,,. ,,. v / lrcl selected from uLiier group, dLe yer ^s indungen

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of the ester type having more than 8 carbon atoms. Such Esters are derived from acids such as oleic acid, stearic acid, Lauric acid, myristic acid, linoleic acid, etc. The essential The effect of the ester-type compounds is the formation of complexes with certain reaction products. This way you prevent gelling and you can also do hydrolysis all in one Hold intermediate stage. This allows ea to obtain concentrations of the hydrolyzate from 15 to 60% by weight.

According to a further invention, new types of hydrolysates of starches or flours which have adhesive strength or resistance to moisture can advantageously be produced. This is a mixture of the compounds of their copolymers with vinyl, acrylic, phenol, urea-formaldehyde or melamine-formaldehyde resins and of monopolymers of these resins. These modified hydrolysates can be obtained directly by hydrolysis, by copolymerizing the monomers of these resins in the course of hydrolysis in the presence of catalysts for the polymerization, by kneading to react for polymerization of the type "emulsion ^11" also add their polycondensates.

These copolymerization phenomena are impossible in production the dextrins can be obtained by dry means, while it is already known about the hydrolysis process that it is impossible " is to generate high concentrations as they are necessary for the glue industry.

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The hydrolysates of starches and flours, pure or modified States produced according to the invention are obtained in a perfectly stable state.

As an industrial product, the hydrolysis derivatives have pure or modified from starch or flour a high concentration of 15 to 60 weight- ^ as well as a high adhesive force, which is due to the procedural measures described are obtained.

For further explanation, examples for the implementation of the method according to the invention are described below:

example 1

You take potato starch, shark flour or something like that and one Catalyst for the hydrolysis of Amyloee-Iyp in quantities of 0.15 to 1 weight in relation to the starch or to the flour, around make the paste in the desired concentration ($ 15 to $ 605). Mix in (Dell starch or flour with 0.95 to 3 »5 Parts by weight of water.

To stabilize and to prevent oiling one adds Esters containing more than 8 carbon atoms in Quantities from 0.2 to 1 weight-ji in relation to the strength or to the flour

The hydrolysis is carried out at a temperature of 20 to 80 ° C. for a time of 40 to 75 minutes in order to produce hydrolysates

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from a concentration of 15 to 60% by weight.

In this example, hydrolyzates are obtained that are usually used with Starch or flour are called * To be made by copolomerization with monomers of the type described below or with polycondensates, some examples of which are given below « To obtain modified hydrolysates, some substances are added in the course of the hydrolysis, for example in the manner described in Example 1.

Example 2

One or more monomers based on vinyl and / or are used Acrylic (ζ «Β · vinyl acetate and / or acrylic ester) in quantities from 2 to 30 weight β-ί * based on starch or flour, also a catalyst of the peroxide type (e.g. persulfate of sodium or potassium or hydrogen peroxide) in a ratio of 0.1 to 1j4 (weight) in relation to the monomers. Until polymerization of the ears · takes place in an emulsion, making an aqueous dispersion arises.

Example 3 One uses monomers of the type urea and formaldehyde and / or Melamine and formaldehyde or polycondensates ditier product «» u. For example, you can apply!

a) 3 »3 part · formaldehyde at 30 ° C for 1 part urea} this corresponds to 2.1 parts of the compound urea-formaldehyde,

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b) 3.3 parts of formaldehyde at £ 30 for 1.4 parts of melamine this corresponds to 2.5 parts of the compound melamine-formaldehyde. 1 to 10 parts by weight of the compound a) and / or the compound b) or a polycondensate% of both in the presence of one Weak base (organic base of the substituted amine type, such as ethanolamine, etc.) are the strength or the throat in particular Ratio to these substances added.

Example 4-

Is added in threaded-chtsTerhältnissen to starch or flour 1 to 4 1 · monomers tob phenol type 1 to 1OfC formaldehyde and 0.3 to 0.5 $> ammonia or JLtznatron to ·

The same applies to example 2, 3 and 4 and thus stable mixtures of hydrelyelated flours, yoä copolymers flours with hydrolyzed resins and resinous homopolymers are obtained.

It should also be pointed out that the products manufactured according to the Examples 3 and 4 have been prepared, water-soluble substances are ·

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Claims (1)

Claims 1, process for the production of hydrolysates of starch or flour by enzymatic hydrolyses, in particular with the participation of enzymes of the amylase type, characterized in, that the hydrolysis is carried out in the presence of at least one agent which has a complexing or gel binding effect, the agent being selected from a group, includes the ester-type compounds having more than 8 carbon atoms, such as the esters of acids such as oleic acid, stearic acid, lauric acid, myristic acid, linoleic acid or the like Acids. 2 · The method according to claim 1, characterized in that during the hydrolysis monomers of the vinyl and / or acrylic and / or phenol or polycondensates of these products and that a catalyst for the polymerization - e.g. of the peroxide type - is added will. 3 · Method according to claim 1 or 2, characterized in that urea and formaldehyde and / or melamine and formaldehyde or polycondensates of these products are added during the hydrolysis will· BADÖRIQINAL
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