Wax dispersions in form of nanoparticles, method of producing said dispersions and method for hydrophobisation of materials using said dispersions

FIELD: chemistry.

SUBSTANCE: invention relates to wax dispersions in form of nanoparticles, used for hydrophobisation of lignocellulose- and/or cellulose-based materials. The wax dispersion contains water as a continuous phase, an emulsifying agent and wax which forms the dispersed phase. More than 85 wt % of the wax is made up of one or more long-chain hydrocarbons containing more than 20 carbon atoms on average, and the wax has hardening temperature ranging from higher than 40 to 150°C. The dispersed wax in form of solid particles has mean particle diameter from 10 to less than 500 nm. The wax dispersion is obtained by heating a mixture containing water, an emulsifying agent and wax to temperature higher than the melting point of the wax, and the molten wax is emulsified using a dispersant and then cooling to temperature lower than the hardening temperature of the dispersed wax phase. Hydrophobisation of materials is carried out by bringing said materials into contact with said wax dispersion and then pressing the material.

EFFECT: obtained wax dispersions contain a large weight ratio of a dispersed wax phase, are stable during storage and are resistant to shearing stress, provide a high hydrophobic effect compared to standard wax dispersions with the same content of wax.

23 cl, 3 tbl, 6 ex

 

The technical FIELD

The invention relates to dispersions of wax in the form of nanoparticles, method of production thereof and to a method of waterproofing materials based on lignocellulose and/or cellulose by contact with dispersions of wax.

PRIOR art

Repeatedly expressed the desire to reduce the water absorption and the ability to swell materials that can absorb moisture, such as wood materials or paper/cardboard products, in addition, the requirements of the law or clients make the necessary compliance with the limit values of water absorption or ability to swell to such materials or products of their further processing. For example, in accordance with current European standards (DIN EN 622 and DIN EN 312) wood materials must meet certain requirements swelling in thickness when being under water and to water absorption.

To ensure compliance with the required limit values for many materials that can absorb moisture during production process gidrofobiziruyuschimi means. It gidrofobiziruyuschey tool should not create the need for excessive addition of water and should not prevent further processing of the material, especially in cases when hydrophobizated source materials are in the form of chips, structure is key or fibers, and products further processing is made from wood chips, shavings or fibers by connecting, for example, by thermal bonding, pressing or gluing the respective binders.

The use of waxes in such materials or source materials containing or consisting of lignocellulose and/or cellulose as a water-repellent funds, including in the form of aqueous dispersions, is well known. Optimization of the hydrophobic effect dispersion of the wax, for example, when using wood materials is still carried out mainly by modifying the composition of the wax phase (see EP 1 448 345-B1).

Described a number of studies on the hydrophobization of wood materials, consisting of lignocellulose, paraffin. Can be called, for example, article E. Roffael, E. Schriever, May H.-A., Adhäsion 11(1982), S.10-19, "Hydrophobierung von Spanplatten mit Paraffin", Teil 1, and the publication May H.-A. and E. Roffael "Hydrophobierung von Spanplatten mit Paraffin", Teil 4 (Adhasion 28(1,2), 17-21). However, further improvements are desirable.

The INVENTION

The present invention is to develop gidrofobiziruyuschey means in the form of a dispersion of wax water-based, which would provide a more hydrophobic effect with the same wax content in comparison with standard dispersions of wax or Odinak the PTO desired level of waterproofing would decrease the content of water-repellent means. At the same time the dispersion of the wax-based water should contain a large mass fraction of the dispersed wax phase to be stable during storage and resistant to shear stress.

This problem was solved by the wax dispersion according to the present invention and method of reception according to the independent claims. Preferred forms of the invention are subject of the dependent claims or are described below.

The wax dispersion according to the present invention contain:

- from less than 70 mass % to 30 mass % of water as a continuous phase,

from more than 0.5 to 10 mass %of at least one emulsifier, and

from more than 20 to 80 mass % wax, which forms a disperse phase, and

- waxes more than 85 mass %, preferably more than 99.8 mass %, consist of one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms,

the waxes are the curing temperature in the range from more than 40 to 150°C, and

dispersed waxes in the form of solid particles have an average particle diameter in the range from 10 to less than 500 nm.

Especially preferred are dispersions of waxes containing:

- from less than 60 to 20 mass %, more preferably from less than 50 to 30% or even 40 to 20 wt the new % water as a continuous phase,

from more than 0.5 to 6 mass % of emulsifier, and

from more than 40 to 80 mass %, more preferably from more than 50 to 70 mass%, or even from 60 to 80 mass % of solid wax as the dispersed phase.

The emulsifier preferably contains or consists of one or more anionic emulsifiers. It can be fatty acids, saponified fatty acids and/or derivatives of fatty acids having carboxyl groups, which can be saponified.

Continuous phase (dispersion medium) of the dispersions of wax is water, discontinuous (dispersed) phase - wax, and the wax is essentially, preferably completely consists of long-chain hydrocarbons. Hydrocarbons in the context of the present invention are compounds consisting exclusively of carbon and hydrogen and having a temperature of curing in the range from more than 40 to 150°C., preferably from 40 to 100°C. (at normal pressure), in particular, with the average number of atoms With from 20 to 100, more preferably from 20 to 50 carbon atoms. As hydrocarbons can be considered saturated or unsaturated hydrocarbon, preferably saturated hydrocarbons.

The wax may be a paraffin wax of petroleum origin, wax, Fischer-Tropsch, polyolefin wax, and can also consist of mixtures of these waxes and/or be a product of the fact of their distillation. The following describes the types of waxes that are suitable for use according to the present invention.

Long-chain saturated aliphatic hydrocarbons are often referred to as paraffin waxes. Paraffin wax is commonly used in industry are products of the distillation of oil and mainly consist of mixtures of n-alkanes and ISO-alkanes, which are solid at temperatures above 40°C, in different proportions.

In one of the preferred embodiments of the invention, these hydrocarbons by more than 60 mass %, preferably more than 80 mass %, are n-alkanes.

Suitable for use paraffin wax can be divided into macro - and microcrystalline waxes. Microcrystalline waxes consist principally of saturated remotemachine unbranched hydrocarbons (n-alkanes) and have a molecular weight in the range of from about 280 to 700 g/mol (number of carbon atoms in the chain is from about 20 to about 50).

Unlike microcrystalline waxes, microcrystalline waxes mainly composed of branched alkanes (ISO-alkanes) and saturated cyclic hydrocarbons (cycloalkanes). The melting range is between 60°C and 90°C. Microcrystalline waxes can also be obtained by hydroisomerization waxes, Fischer-T is Opsa.

The dispersion is stabilized by the emulsifier. Emulsifiers are surface-active amphoteric high-molecular substance or substances. The emulsifiers may be anionic, cationic, nonionic or betanova structure, preferably anionic. As emulsifiers should be called:

- ethers, alcohols and glycol, for example ethers with the General formula R-O-(R1-O)n-H

- esters of fatty acids and polyethylene glycol, for example esters with the General formula R-COO-(R1-O)n-H

- carboxylic acids on the basis of simple esters alkylpolyglycoside, for example carboxylic acids with the General formula R-O-(R1-O)n-CH2-COOH, or alkanolammonium salts, or salts of alkaline or alkaline earth metals

- alkylmethacrylamide, such as alkylmethacrylamide with the General formula R-CONH(CH2)uN+(CH3)2-CH2-COO-,

- aminoxide, such as aminoxide with the General formula R-NR(CH3)2where in each formula:

R denotes the residue of a branched or linear, saturated or unsaturated hydrocarbon containing From8-C20or C7-C19carbon atoms,

n is a number from 2 to 20,

R1- alkalinity residue with 2 to 4 carbons, for example-C2H4- or-C3H6 -that can be different for each n, and

u is a number from 1 to 10,

products alkoxysilane triglycerides, which are fully or partially tarifitsirovana6-C22fatty acids with each mole of triglyceride used from 2 to 40 moles alkoxygroup funds

- partially neutralized and partially substituted glycerides of monobasic or polybasic C2-C22 carboxylic acids, for example linoleic acid, stearic acid, ezoterikovou acid, palmitic acid, lauric acid, Caprylic acid, capric acid, citric acid and/or lactic acid,

- esters of polyglycerol, in which the remainder of the carboxylic acid preferably contains from 2 to 22 carbon atoms,

- C6 to C32 carboxylic acids, in particular C8-C fatty acid, fully or partially, preferably completely saponified, for example, with amines or compounds with functional amino group, such as diethanolamine.

Emulsifiers in the context of the present invention are high-molecular substances such as gum Arabic, gum, ghatti or compounds of cellulose.

In one of the preferred embodiments of the invention used emulsifiers more than 50% by weight, calculated on the quantity used emulsifiers and/or the surface-active substances, preferably completely consist of C6-C32)-carboxylic acid, fully or partially, preferably completely saponified preferably amines or compounds containing the amino group.

You can also use a mixture of emulsifiers, for example anionic and nonionic or anionic high molecular weight emulsifier. The emulsifier should be added in quantities of 0.2 to 10 mass %, more specifically 2 to 6 mass %, of the total weight of the composition. It is preferable to use anionic emulsifiers, in particular exclusively anionic emulsifiers (i.e. not to use other surfactants or emulsifiers, and if the corresponding data in mass percent, they refer to the amount of emulsifiers and surfactants). Unlike PIT-method of producing emulsions (PIT=the temperature of the treatment phase) in the method of producing dispersions of wax in the form of nanoparticles according to the present invention it is necessary to use much smaller amounts of emulsifiers. This is an advantage for the application of dispersions of wax as a water-repellent tools.

In the standard dispersion of wax particles have a size from a few microns to more than 500 μm. Depending on the system emulsifier/stabilizer" they show great sensitivity to srezhu is their efforts. This creates a need for careful selection of pumps.

The subject invention are aqueous dispersions of wax, which as a dispersed phase containing solid particles with a mean diameter of from 10 to 500 nm, preferably from 50 to 250 nm, and most preferably from 100 to 200 nm.

The process of emulsification can generally be divided into the following stages: preliminary mixing of the individual components with obtaining a coarse pre-emulsion (premix), fine emulsification through destruction drops when exceeding the critical level deformation and stabilization of new surfaces of separation of the phases by using an emulsifier.

In an apparatus for emulsification can be called rotor-stator mixer. The energy required for grinding, transmit rotating parts. They can be operated periodically or quasi-continuous and provide a combination of various stages of the method (such as mixing components, emulsification and directional change of the temperature regime with the goal of pasteurization and/or cooling) in one processing unit.

In the basis of high-pressure homogenizers are the high-pressure pump and homogenizing nozzle. The high-pressure pump generates energy, which can then be used for rosmel the treatment drops could result in the release into the homogenizing valve.

In high-pressure homogenizers, you can use the pressure from a hundred to several hundred bar, in special cases up to thousands of bar. The crude emulsion is pumped through the Central inlet hole and then passes through the radial gap between the valve seat and the plunger valve. To provide opportunities of small droplets and a narrow distribution of residence time can be used many different geometric shapes of the nozzles. Examples of suitable radial diffusers are cast nozzle, serrated nozzle and nozzle with a cutting edge.

In the dispersant with opposing threads (Nanojete, Microfluidizer®) there are two or more streams of crude emulsion of the at least two located opposite each other holes or channels. In addition, as a homogenizing nozzles can be used jet disperser, and a simple perforated diaphragm or a combination of several perforated diaphragms of different diameters. Dispersers with opposing threads have no moving parts and have a simple construction.

Discuss waxes that only with great difficulty sieved using standard methods of grinding, can be translated in the form of a fine dispersion by emulsification of the melt, for example, using homogenizate is a high pressure homogenizing pressure, equal to 120 bar.

The waxes in the form of solid wax or in the form of dispersions added during the production of wood-based materials wood chips, shavings or fibers to ensure that they are hydrophobic, especially in the form of plates, and, above all, to reduce water absorption and the resulting swelling. As the measured values are often used swelling in thickness after staying in water for 2 hours or 24 hours (for example, according to DIN EN 622 and DIN EN 312).

In the preferred embodiment, of the invention such materials containing fibers, shavings and/or chips are fibrous plates of medium density fiber boards high-density plates oriented flat chips (OSB-boards or particle boards.

In another preferred embodiment of the invention, the material containing fibers, shavings and/or chips, are cardboard, paper fiber or paper.

Hydrophobization should prevent the reduction of mechanical strength under the influence of moisture and to prevent the increase in the length or thickness at a high humidity environment.

Paraffin waxes slow the absorption of water and the rate of swelling in thickness when under water. In addition to direct water-repellent effect, paraffin waxes also increase the resistance to ellenie the sticking of chips, chips and fibers. It also has a positive effect on machinability and raspadaemosti shavings, chips or fibers.

Direct application of hot molten paraffin wax has the advantage consisting in saving emulsifiers and stabilizers, and in contrast to aqueous dispersions does not require the addition of water together with wax during processing. The disadvantage is the necessity of heating the piping system and the metering devices, as well as difficulties with a uniform distribution of small amounts of paraffin wax on the chips. Emulsifier, usually counteracts the hydrophobization. Therefore, the goal is to obtain dispersion using as little as possible emulsifier.

It is proposed to apply paraffin wax shavings in the form of aqueous dispersions. Dispersion of paraffin wax can be sprayed in the form of a mixture with the binder or to put on shavings, wood chips or fibers before or after addition of the binder. If necessary, the dispersion of the wax can be applied to fibers, shavings or chips by precipitation.

Preferably used from 0.1 to 5 mass %, more preferably from 0.5 to 2.5 mass %, solid wax, calculated on the dry weight of the material.

Paraffin waxes should not influence or exert little influence what and curing the coating layer (SP) and/or the middle layer of glue. Often use urea resin acid-cured, alkaline phenol-formaldehyde resin curing, polymer methylenedianiline (PMDI) or thaninformation resin.

Thus, in another aspect, the invention relates to a method of waterproofing materials obtained by using fibers, shavings or chips containing or consisting of lignocellulose and/or cellulose dispersion of the wax, wherein the wax dispersion contains water, emulsifier and wax with the curing temperature in the range from 40 to 150°C, and the waxes include one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms, and are in the form of solid particles with an average diameter of from 10 to less than 500 nm, dispersed in a continuous phase, and the method includes the following steps:

(a) preparation of dispersion of the wax,

(b) bringing the fibers, shavings or chips in contact with the dispersion of the wax with the aim of applying wax on the fibers, shavings or chips, and

(C) compacting the material containing fibers, shavings or chips and, optionally, other additional components, and the wax dispersion contains:

- from less than 70 mass % to 20 mass % of water as a continuous phase,

from more than 0.5 to 10 mass %of at least one emulsifier, and

from more than 20 to 80 mass % wax, forming a disperse phase, and

- waxes more than 85 mass % represent one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms.

The following aspect of the invention relates to the composition to obtain material containing:

- fibers, shavings or chips containing or consisting of lignocellulose and/or pulp,

- at least one binder for the connection of the fibers, shavings or chips, where the binder is one or more of binders selected from the group consisting of urea resins, acid-curing phenol-formaldehyde resins alkaline curing, polymer etilendiamindisuktsinatov (PMDI) and thaninformation resins, and

- at least one gidrofobiziruyuschey tool.

Thus the composition according to the invention differs in that gidrofobiziruyuschey the product contains:

- from less than 60 mass % to 20 mass % of water as a continuous phase,

from more than 0.5 to 10 mass %of at least one emulsifier, and

from more than 40 to 80 mass % wax, forming a disperse phase, and

- waxes more than 85 mass % consist of one or more long-chain hydrocarbons, containing, on average, the m ore than 20 carbon atoms,

the waxes are the curing temperature in the range from more than 40 to 150°C, and

dispersed waxes in the form of solid particles have an average particle diameter in the range from 10 to less than 500 nm.

In the preferred embodiment of the invention, such materials are obtained by use of the above compositions are fibrous plates of medium density fiber boards high-density plates oriented flat chips (OSB-boards or particle boards.

In another preferred embodiment of the invention these materials are cardboard, paper fiber or paper.

DESCRIPTION of embodiments of the INVENTION

Was obtained aqueous dispersion of paraffin wax with a solids content equal to 60%, based on the petroleum waxes. For the manufacture of the primary emulsion (premix) the required amount of water with a temperature of about 80°C was added into the reactor with stirrer.

Emulsifier (C20 fatty acids and diethanolamine) was added to water with stirring and held a reaction. Then under stirring was added the appropriate amount of molten paraffin wax. Under stirring for approximately 5 minutes was obtained primary emulsion.

The primary emulsion was processed using a homogenizer high pressure the Oia with serrated nozzle at a pressure approximately equal to 120 bar, and then cooled in the variance of the wax (A). Part of the wax dispersion (A) was paid to further reduce the size of the particles was processed using a disperser with counter flows (Microfluidizer®) at 1000 bar and then cooled in the variance of the wax (C).

Granulometric composition of the particles was determined using the principle of diffraction of laser radiation.

(A) Hydrophobicity of wood fibers

In all cases, the test sheet was applied to 0.5 mass % dispersion of paraffin wax by weight of the fibrous material. Then the fibrous material was dried at 90°C and brought the wax dispersion to coagulate. Fibrous material further investigated according to the method described .Raffael et al. (Holz als Roh - und Werkstoff, Band 60 (2002), S.347-348, Springer Verlag), to assess the wettability of the wood grain. For each case was held on 10 measurements. The study leaves within 24 hours was kept in normal climatic conditions (20°C/relative humidity 65% according to DIN 50014). The slower is the penetration of water droplets in the resulting test sheets, the stronger hydrophobic effect dispersion of paraffin wax.

It has been unexpectedly discovered that these new dispersion have a much better water-repellent effect and can store the I longer than a similar dispersion of wax with a standard particle size. By reducing the size of the particles managed to increase the wetting of 38% compared to the same dispersion with a standard particle size.

The comparison of the characteristics of the dispersions are shown in tables 1 and 2.

Table 1
AndIn
Water40 mass %40 mass %
Wax (petroleum paraffin wax)Identical
Emulsifier5 mass %5 mass %
Anionic emulsifier according to exampleIdentical
Particle sizeAbout 1 μmAbout 150 microns
The viscosity (25°C, Brookfield)1760 MPa-2060 MPa-
Test centrifugation, 1 hour1% 0%
Test centrifugation, 4 hours4%<0,5%
The increase in time wetting+7,9+10,9

Table 2
Variance
The sample - average particle diameter of about 1 μm
Sample - average particle diameter of about 150 nm
And
mcm
In
mcm
X10,30,5760,0932
X50,31,0940,185
X90,31,6690,400
X3,20,9410,163

X10,3X50,3and X90,3denote the mass fraction of the aggregate particles, the size of which is smaller than the specified diameter of the particle, X3,2denotes the diameter of C is the Uther.

Centrifuge provided g=3200. A sample of the emulsion for 1 hour or 4 hours was subjected to gravitational acceleration equal to g=3200. The proportion of separated water was expressed in % of the height of the sample. Test centrifugation is a good measure of the stability of the emulsion during storage.

Wetting was assessed as the time from the application of colored drops of water until it is completely absorbed. Determination of wetting is the evaluation method of waterproofing.

In the following Table 3 shows the results of tests of samples obtained using different chemical nature and physical-chemical properties of the types of emulsifiers. These results show that different types used in the art emulsifiers provide the above positive effects of the invention, which suggests that the choice of a particular type of emulsifier is not critical for obtaining the desired result.

Table 3
Example aThe example InExampleExample DExample EExample F
In the Yes (%) 4040575754,02of 46.68
Wax (paraffin)555540404047,73
The emulsifier(s) (total)55335,985,59
Anionic emulsifierC20-fatty acidC20-fatty acidC18-20-fatty acidC20-fatty acid
Meaningy emulsifierTOTriton-X-100TOHR and AA
Viscosity [MPa·s]1760206034,21783404,8
Test centrifugation
[%H2O]1 hour
10240<0,1
Test centrifugation
[%H2O]4 hours
4<0,5
The increase in time wetting+7,9+10,9
The surface of the particles [m2/ml]20,0719,759,88
X10,3 0,5760,0932
X50,31,0940,185
X90,31,6690,4
X3,2(average particle size)0,9410,1630,3070,3880,1190,184
TO = Lutensol TO-8 from the manufacturer BASF = polietilenglikolya ether alcohol, ISO-C13H27About(C2H4O)8N
Triton-X-100 = polietilenglikolya ether alcohol, C14H22O[C2H4O)9-10H
HR = Lutensol XP-99 = polietilenglikolya ether alcohol, alcohol=C10-alcohol Garbeta (Guerbet Alcohol)10N 11About(C2H4O)9N
AO = Lutensol AO-5=polietilenglikolya ether alcohol With13With15-oxopent-(C2H4O)5N

1. The use of dispersion of the wax as a water-repellent means for lignocellulose and/or cellulose in the form of fibers, shavings or chips, and the wax dispersion contains:
- from less than 60 wt.% up to 20 wt.% water as a continuous phase,
from more than 0.5 to 10 wt.%, at least one emulsifier and
from more than 40 to 80 wt.% waxes, forming a disperse phase, and
- waxes more than 85 wt.% consist of one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms,
the waxes are the curing temperature in the range from more than 40 to 150°C, and
dispersed waxes in the form of solid particles have an average particle diameter in the range from 10 to less than 500 nm.

2. The application of the wax dispersion according to claim 1, wherein the wax dispersion contains:
from less than 50 to 30 wt.% water as a continuous phase,
from more than 0.5 to 6 wt.% emulsifier and
from more than 50 to 70 wt.% solid wax as the dispersed phase.

3. The application of the wax dispersion according to claim 1 or 2, characterized in that the waxes are long-chain saturated hydrocarbons, waxes Fiesch is a-Tropsch, polyolefin wax and/or paraffin waxes obtained from petroleum.

4. The application of the wax dispersion according to claim 1 or 2, characterized in that the hydrocarbons of more than 60 wt.%, preferably more than 80 wt.% are n-alkanes.

5. The application of the wax dispersion according to claim 1 or 2, characterized in that the solid waxes are the curing temperature in the range from more than 40 to 100°C.

6. The application of the wax dispersion according to claim 1 or 2, characterized in that the emulsifiers are anionic emulsifiers, preferably based on fatty acids, saponified fatty acids and/or derivatives of fatty acids, which optionally can be stylename.

7. The application of the wax dispersion according to claim 1 or 2, characterized in that the continuous phase, the dispersed solid particles with an average diameter of from 10 to less than 250 nm, particularly preferably from 100 to 200 nm.

8. The application of the wax dispersion according to claim 1 or 2, characterized in that the dispersion contains greater than 0.5 but less than 6 wt.% emulsifier.

9. The application of the wax dispersion according to claim 1 or 2, characterized in that the emulsifiers more than 50% by weight, calculated on the quantity used emulsifiers and/or surfactants, preferably completely consist of C6-C32)-carboxylic acid, fully or partially, preferably completely saponified, before occhialino amines or compounds, containing the amino group.

10. Method of waterproofing materials obtained by using fibers, shavings or chips containing or consisting of lignocellulose and/or cellulose dispersion of the wax, wherein the wax dispersion contains water, emulsifier and wax with the curing temperature in the range from 40 to 150°C, and the waxes include one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms, and are in the form of solid particles with an average diameter of from 10 to less than 500 nm, dispersed in a continuous phase, and the method includes the following steps:
(a) preparation of a dispersion of wax
(b) bringing the fibers, shavings or chips in contact with the dispersion of the wax, with the aim of applying wax on the fibers, shavings or chips, and
(C) compacting the material containing fibers, shavings or chips and, optionally, other additional components, and the wax dispersion contains:
- from less than 70 wt.% up to 20 wt.% water as a continuous phase,
from more than 0.5 to 10 wt.%, at least one emulsifier and
from more than 20 to 80 wt.% waxes, forming a disperse phase, and
- waxes more than 85 wt.% represent one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms.

11. The method according to claim 10, wherein modulating isout dispersion of wax, contains:
- from less than 60 wt.% up to 20 wt.% water as a continuous phase,
from more than 0.5 to 10 wt.%, at least one emulsifier and
from more than 40 to 80 wt.% waxes, forming a disperse phase, and
- waxes more than 85 wt.% represent one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms.

12. The method according to any of PP or 11, characterized in that the alignment of fibers, shavings or chips in granular form into contact with a dispersion of wax is realized by means of sputtering.

13. The method according to any of PP or 11, characterized in that the wax dispersion is brought into contact with the fibers, shavings or chips placed in water or mixed with a dispersion of wax, and, if necessary, the dispersion of the wax is applied on the fibers, shavings or chips by precipitation.

14. The method according to claim 10 or 11, characterized in that the materials containing fibers, shavings and/or chips are fibrous plates of medium density fiber boards high-density plates oriented flat chips (OSB-boards or particle boards.

15. The method according to claim 10 or 11, characterized in that the materials containing fibers, shavings and/or chips, are cardboard, paper fiber or paper.

16. The method according to claim 10 or 11, characterized in that is used from 0.1 to 5 wt.%, bol is e preferably from 0.5 to 2.5 wt.% solid wax, calculated on the dry weight of the material.

17. A method of obtaining a dispersion of wax containing:
- from less than 60 wt.% up to 20 wt.% water as a continuous phase,
from more than 0.5 to 10 wt.%, at least one emulsifier and
from more than 40 to 80 wt.% waxes, forming a dispersed phase in which the waxes include one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms, and dispersed in the form of solid particles in a continuous phase, wherein the solid wax particles have an average diameter of from 10 to less than 500 nm, and the method includes heating the pre-mixture containing water, at least one emulsifier and wax to a temperature exceeding the melting point of wax/wax, and emulsification of molten wax using a disperser with counter flows and/or flow disperser, followed by cooling to a temperature below the temperature of curing dispersed wax phase.

18. The method according to 17, wherein the wax dispersion contains:
from less than 50 to 30 wt.% water as a continuous phase,
from more than 0.5 to 6 wt.% emulsifier and
from more than 50 to 70 wt.% solid wax as the dispersed phase.

19. The method according to 17, characterized in that the use of dispersant with opposing threads.

20. Composition for obtaining materials, aderasa is:
- fibers, shavings or chips containing or consisting of lignocellulose and/or cellulose,
- at least one binder for the connection of the fibers, shavings or chips, where the binder is one or more of binders selected from the group consisting of urea-formaldehyde resin acid curing phenol-formaldehyde resins alkaline curing, polymer etilendiamindisuktsinatov (PMDI) and thaninformation resins, and
- at least one gidrofobiziruyuschey means, characterized in that gidrofobiziruyuschey tool contains:
- from less than 60 wt.% up to 20 wt.% water as a continuous phase,
from more than 0.5 to 10 wt.%, at least one emulsifier and
from more than 40 to 80 wt.% waxes, forming a disperse phase, and
- waxes more than 85 wt.% consist of one or more long-chain hydrocarbons, containing, on average, more than 20 carbon atoms,
the waxes are the curing temperature in the range from more than 40 to 150°C, and
dispersed waxes in the form of solid particles have an average particle diameter in the range from 10 to less than 500 nm.

21. The composition according to claim 20, characterized in that the materials are fibrous plates of medium density fiber Board, high density, plate oriented flat chips (OSB-is LTL) or chipboard.

22. The composition according to claim 20, characterized in that the materials are cardboard, paper fiber or paper.

23. The composition according to claim 20 or 21, characterized in that the materials are materials based on wood.



 

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FIELD: process engineering.

SUBSTANCE: invention relates to pulp of organic stuff particles for production of ligno-carbohydrate plastic. Said pulp comprises minced particles of conifer needle, coniferous branch bast peeling, timber and wastes of Siberian pine cones in various versions. Said pulp features improved extraction of active natural substances from said components to produced binder.

EFFECT: pulp of organic stuff particles for production of ligno-carbohydrate plastic at reduced temperature of thermal compaction.

11 cl, 11 tbl

FIELD: chemistry.

SUBSTANCE: polyvinyl chloride-based wood-polymer composition for profiled-trim moulding articles contains polyvinyl chloride, wood flour, a complex stabiliser, an acrylic modifier, polyethylene wax and a metal-containing lubricant. The metal-containing lubricant used in the composition is obtained by reacting higher monocarboxylic acids with glycerin at 130-230°C at molar ratio 1:(1-2) in the presence of oxides of divalent metals Ca, Zn, Mg or their two-component mixtures in weight ratio 0.25-1.0:0.5-1.0 in amount of 0.5-2.0 wt % of the overall reaction mass, where the higher monocarboxylic acids used are VIK, oleic and stearic acid. The composition also uses polyethylene wax with melting point not higher than 100°C. The complex stabiliser used is selected from: BAEROPAN R 9003 (produced by Baerlocher GmbH, Germany) or Naftosafe PEK 922 B (produced by Chemson, Austria). The acrylic modifier used is impact-resistant modifiers selected from: MB-87, DURASTRENGTH D320, DURASTRENGTH D300S (produced by Arkema, France), Metablen P-5500S (produced by Dangdong), Paraloid BTA 736H-S OS (produced by Rohm & Haac), Kane ACE F50 (produced by Kalek), Lariks on TU 2216-235-05757533-2000.

EFFECT: high quality of profiled-trim moulding articles, which is expressed by improved operational and technological parameters, specifically melt flow index, thermal stability, impact viscosity, low water absorption and environmental safety of the composition.

2 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: product contains the following in wt %: 1-50 modified hybrid resin based on natural fatty acids and 99-50 natural material selected from cellulose, wood, wood fibre, flax, hemp, starch and another natural fibre or combinations thereof. The product can contain 20-80 wt % thermoplastic, 30-70 wt % binder or natural adhesive. The hybrid resin is obtained via water-emulsion polymerisation of an acrylate monomer - butylacrylate, methyl methacrylate or butylacrylate, on an alkyde resin based on fatty acids in the presence of a radical initiator at 30-100°C. Fatty acids are selected from tall oil, suberin fatty acids, cutin fatty acids, vegetable oils and mixtures thereof. The composite product is obtained by mixing acrylate hybrid and natural material or combination thereof. Further, the product is moulded and hardened under heat at 120-200°C until a composite product of the given type is obtained.

EFFECT: invention enables to obtain composite plates with improved properties, good biodegradability and low toxicity; such properties of the plates are achieved by using modified hybrid resins in form of a stable aqueous emulsion as binding materials and compatibilisers.

22 cl, 1 tbl, 1 dwg, 9 ex

FIELD: chemistry.

SUBSTANCE: moulding composition contains an aggregate made from carbon-containing crushed plant and/or synthetic fibre material, binder made from inorganic polymers and a target additive. The inorganic polymers used in the composition are metal phosphates with aluminium, chromium, boron and magnesium cations and anions РО4--- or metal silicates with sodium, potassium and lithium cations and with anions SiO3--, pre-modified with solutions of organic bases with an amide bond and/or oxides or trihydrates of aluminium oxide or mixtures thereof. The target additive is a water repellent or hardener or surfactant. The aggregate, working solution of the binder and target additive are prepared first. The aggregate is treated with the working solution, dried and moulded into briquettes.

EFFECT: ecologically clean, non-toxic, non-combustible slab materials which are resistant to aggressive media are obtained.

41 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: composition contains the following, wt %: 0.05-6.9 (a) bisamide of saturated fatty acid with the structure: , where R1 and R2 are saturated hydrocarbyl groups with C11-C35; 0.14-7.6 (b) bisamide of unsaturated fatty acid with the structure: , where R3 and R4 are unsaturated hydrocarbyl groups with C11-C35; (c) dispersed cellulose material such as wood flour; (d) thermoplastic resin - flakes fractionated from molten high-density polyethylene (HDPE); (e) a finishing agent for finishing the cellulose material (c) with thermoplastic resin (d). The composition also contains an optional (f) inorganic dispersed material selected from pumice and talc and (g) a lubricant, separately or in a combination, selected from zinc stearate, sodium stearate, potassium stearate, paraffin wax or polyethylene wax.

EFFECT: invention enables to obtain composites with improved operational properties, ultimate bending strength and resistance to water absorption.

11 cl, 10 tbl, 31 ex

FIELD: chemistry.

SUBSTANCE: invention relates to composite products, particularly a composite panel containing hybrid resins based on natural acids, as well as a method of producing a composite product. The product contains the following in wt %: 1-50 modified hybrid resin based on natural fatty acids and 99-50 natural material selected from cellulose, wood, wood fibre, flax, hemp, starch and another natural fibre or combinations thereof. The product can optionally contain 20-80 thermoplastics, 30-70 binder or natural adhesive. The hybrid resin is obtained via condensation of a mixture of natural C12-C20 fatty acids modified with maleic acid or anhydride, and an alkyde resin based on fatty acids of tall oil, suberin fatty acids, cutin fatty acids, plant oil or mixtures thereof. Properties of the panel are achieved using modified hybrid resins in form of a stable aqueous emulsion as binding materials and compatibilisers.

EFFECT: invention enables to obtain composite panels with improved properties, specifically good biodegradability and low toxicity.

17 cl, 1 tbl, 27 ex

FIELD: chemistry.

SUBSTANCE: wood-polymer composition for articles contains polyvinyl chloride, wood flour, calcium-zinc complex stabiliser and the composition can additionally contain a metal-containing lubricant obtained via reaction of higher monocarboxylic acids with glycerine at 130-230°C in molar ratio 1:(1-2) in the presence of oxides of divalent metals Ca, Zn, Mg or other two-component mixtures in weight ratio 0.25-1.0:0.5-1.0 and polyethylene wax.

EFFECT: high quality of ready articles owing to improved technological parameters of the compositions, thermal stability, melt fluidity, water absorption and environmental safety.

2 cl, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to using wax water dispersion as oil-wetting agent in producing wood-base materials. Wax dispersion contains soft wax with content of oil exceeding 20% by wt as solid phase or its component. Note here that soft wax is solid at, at least, 10°C and below, and features softening temperature below 65°C, and contains 0.5-10 % by wt of urea per wax dispersion weight. Soft wax-to-urea weight ratio varies from 100:0.3 to 100:6. Wax dispersion is brought in contact with wood chippings or fibers. Invention covers also wood-base material produced in using binders, soft wax and urea, and method of its production.

EFFECT: higher oil-wetting effect and better physical and chemical properties.

28 cl, 1 tbl, 2 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: material contains the following mixture, wt %: polyalkylene terephthalate - up to 100, polycarbonate 1-35, olefin polymer or copolymer - polyethylene, polypropylene, copolymer of ethylene with propylene 1-10, and synthetic wax 0.03-3, selected from a group comprising ester, amide or polyethylene wax. The material also contains 0.1-1 wt % thermal and thermo-oxidative decomposition stabiliser and 0.01-5.0 wt % colouring additive, which is also a polyalkylene terephthalate structuring agent.

EFFECT: invention enables to obtain polyester composite materials with higher melt flow index.

3 cl, 1 tbl, 21 ex

FIELD: chemistry.

SUBSTANCE: method of preparing a paraffin wax emulsion involves preparation of a pre-emulsion by mixing a molten mixture of paraffin wax, mineral oil in concentration of 2.0-6.0 wt % of the emulsified mixture, an emulsifying agent in concentration of 3.0-8.0 wt % of the emulsified mixture and water. The mixture is stirred at 70-75°C for 15-25 minutes. Subsequent dispersion of the pre-emulsion is carried out in a hydrodynamic disperser at 70-75°C until an emulsion with average size of paraffin wax particles less than 1 mcm is obtained. The obtained emulsion is then cooled to temperature not over 25°C, held for 1 day and filtered. The paraffin wax mixture contains petroleum wax C18-C35 of the methane family with melting point of 45-65°C and C36-C55 isomeric structure with dropping point of 55-66°C with weight ratio of 90:10-10:90. The emulsifying agent used is non-ionic, anionic surfactants, a composition based on a mixture of stearin and/or stillage bottoms from production of fatty acids, esters of polyoxyethylated fatty alcohols and acids and an amine in weight ratio 1:1.0-1.5:1.0-1.5:0.5-1.0.

EFFECT: method enables to obtain paraffin was emulsion with high content (more than 60 wt %) of paraffin wax, which is stable for a long period of storage.

3 cl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polymer compositions suitable for making moulded articles, particularly a polyethylene terephthalate composition for making plastic cards. The invention describes a composition containing the following in wt %: polyethylene terephthalate or polyethylene terephthalate based copolymer - up to 100, polyacrylonitrile butadienestyrene 1-30, synthetic amide or ester wax 0.1-3.0, polyolefin 0.5-12, thermal and thermo-oxidative decomposition stabiliser 0.1-1.0 and colouring additive 0.02-7.0. The polyolefin used is polyethylene, polypropylene, copolymer of ethylene with propylene or octane, and(or) polyolefin which contains carboxyl or epoxy functional groups.

EFFECT: composition improves mouldability of polymer articles and impact viscosity increases 1,8-5,5 times.

1 cl, 1 tbl, 18 ex

FIELD: chemistry.

SUBSTANCE: invention relates to technology of polymer composite materials based on polyethylene terephthalate, particularly to making thin-walled articles like plastic cards. The described material contains the following in wt %: polyethylene terephthalate or polyethylene terephthalate based copolymer - up to 100, polymethacrylate as a modifying additive 1-50 and synthetic wax selected from amide, ester, polyethylene wax 0.05-1.5. The material also contains a thermal and a thermo-oxidative decomposition stabiliser, a colouring additive, an olefin polymer or copolymer and a functionalised olefin polymer or copolymer having carboxyl and epoxy groups.

EFFECT: material enables to make articles with better mouldability, impact viscosity of the material increases 2-3 times compared to existing materials.

4 cl, 1 tbl, 21 ex

Polymer composition // 2395542

FIELD: chemistry.

SUBSTANCE: invention relates to polymer compositions, particularly to rubber mixtures for making tyre treads and can be used in the tyre industry. The polymer composition contains the following components, in pts. wt: polybutadiene rubber SKD 20-30, polyisoprene rubber SKI-3 70-80, zinc oxide 4-5, technical carbon N339 50-55, oleic acid 1.5-2.0, sulphur 1.5-2.2, sulfenamide T 1.0-1.5, diaphene PP 1.0-1.5, Pikar hydrocarbon resin 2-3, oil PN-6s 10-15, Omsk-10 wax 1.5-2.0, acetonanyl N 1.5-2.0, santogard PVI 0.1-0.15, 3-15 mm long pieces of waste hybrid saturated cords 1.5-20.0.

EFFECT: increased extension elongation, bouncing elasticity and lower brittleness temperature.

2 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a wax composition for protecting surfaces of vehicles from atmospheric effects and is also a car care product, particularly for filling various defects on surfaces of vehicles. The composition contains a substance with a wax structure, a pigment and liquid silicon polymer material. The wax material used is carnauba wax or ceresin wax. The liquid polymer material used is polymethylsiloxane. The composition also contains mica and abietic acid.

EFFECT: obtaining a composition which has a long storage period and has high plasticity and adhesion, as well as water-repellent and anticorrosion properties.

FIELD: chemistry.

SUBSTANCE: invention concerns colourant substances creating scale effect on plastic. Invention claims composition for plastic dyeing, where one or more colourants creating scale effect is mixed with at least partially polarised carrier material. Also invention claims method of obtaining colourant composition and its application in plastic colouring and in obtaining concentrated colourant.

EFFECT: prevented dust collection, easy flowing, increased material amount in extrusion process by double-rotor extruders and higher output of concentrated colourants in single-rotor extruders.

10 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the thermoplastic resin particles designed for forming the Styrofoam containers. The foaming thermoplastic resin particles are described, consisting of polymer obtained from the vinyl aromatic monomers, and bearing on their surface the covering composition at approximately 0.005 to 2.0 mass percent at particle mass. At that, the said covering composition includes the components selected from the group consisting of 1) liquid part and 2) solid part; and the said liquid part contains: a) from approximately 0.01 to 0.8 mass percents at a particles mass of polyethylene glycol with the apparent molecular weight from approximately 200 to 800; the said solid part contains the components selected from the group consisting of b) from approximately 0.01 to 1.0 mass percent at a mass of the polyolefin wax particles; c) from approximately 0.01 to 0.6 mass percent at a mass of the particles of the metal-containing salt of the higher fatty acids; d) from approximately 0.01 to 0.8 mass percents at a particles mass of polyethylene glycol with the apparent molecular weight from approximately 900 to 10000; and e) from approximately 0.01 to 0.1 mass percent at a mass of the fatty bisamide particles; and their combinations. Also, the styrofoam container and the formed article produced from the said foaming particles, are described. The covering composition for the said particles and the method for improvement the leakage resistance in the styrofoam container, are described.

EFFECT: prevention of oil and/or fat-containing liquid and food leakage, edge firmness improvement.

31 cl, 10 tbl, 10 ex

Rubber mixture // 2255947

FIELD: rubber and tire industry.

SUBSTANCE: invention relates to rubber mixtures based on unsaturated rubbers and can be used in manufacturing protective rubbers. The rubber mixtures comprises oleic acid additionally in the mass ratio of stearic and oleic acids = 1:1.5, respectively, in the following ratio of components, mass. p. p.: unsaturated rubber, 100; sulfur, 1.7-2.2; rubber accelerator, 1.4-1.8; softening agent, 8.0-15.0; protective wax, 1.0-2.0; N-isopropyl-N'-phenyl-n-phenylenediamine, 1.0; polymerized 2,2,4-trimethyl-1,2-dihydroquinoline, 2.0; N-cyclohexylphthalimide, 0.2-0.3; technical carbon, 55.0-60.0; zinc oxide, 3.0-5.0; stearic acid, 0.8; oleic acid, 1.2. Invention provides expansion assortment of rubber mixtures eliciting the improved complex of technological and physical-mechanical properties: improved technological and some physical-mechanical properties of rubbers - increased wear resistance of rubbers, fatigue endurance and reduced cost of articles due to change of 60% of stearic acid for more cheap oleic acid.

EFFECT: improved properties of rubber mixtures and rubbers.

3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to compositions used in cosmetic compounds containing cross-linked silicone copolymers, where the cross links are acrylate oligomers or polymers. The disclosed compositions, which are used cosmetic compounds, contain silicone copolymers, terpolymers and higher-order polymers, which contain polyether-substituted repeating units and epoxy- and oxirane repeating units which react with acrylate compounds in the presence of a free-radical initiator.

EFFECT: disclosed compositions are hydrophilic, are compatible with a wide range of polar and non-polar media and can swell either in water or oil, thereby enabling emulsification, thickening, adhesion, lustre, longevity and removal of hydrophilic agents.

54 cl, 33 tbl, 42 ex

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