The modification of aqueous anionic dispersions polyetherurethanes |
|
IPC classes for russian patent The modification of aqueous anionic dispersions polyetherurethanes (RU 2035473):
 Flame retardant polymer composition / 2034874
The invention relates to flame-retardant plasticized composition used for the manufacture of insulation, shielding, reinforced cords, molded plugs and other products that meet the requirements of IEC 332 3 hours and IEC 227-5 on fire
 Composition for the manufacture of friction material / 2034869
The invention relates to filled polymeric materials and can be used in the manufacture of friction material in brake systems of vehicles, couplings and other products of similar purpose
 Molded polymer composition / 2031911
The invention relates to the production of molded phenolic plastics, for the manufacture of parts for insulation purposes, operating in conditions of high voltage and cyclical changes, in particular connectors
 Cooling material / 2026872
The invention relates to the field of accumulating and holding cold materials intended for a small Autonomous sources of cold, used in everyday life, technology, and medicine
 Fire protective polymer composition / 2024560
 Molding composition for shoes / 2022981
The invention relates to polymer industry, in particular molding composition for shoes, and can be used for injection molding of soles-based thermoplastic elastomers
 Polymer composition for film coating / 2022979
The invention relates to polymer compositions and can be used as a protective coating for fire pressure hoses, as artificial leather, film coating for wood and other decorative plates
 Polymer friction materials / 2022977
The invention relates to compositions for the manufacture of friction technological products used in brake devices of various vehicles
 A method of obtaining a bitumen-rubber composition / 2016018
The invention relates to construction materials and can be used in the manufacture of waterproofing and roofing materials type gidrostekloizol and roofing material
 The rubber mixture of hot vulcanization / 2016008
The invention relates to light industry, in particular to a Shoe production, and can be used in the manufacture of shoes by hot vulcanization, and in the manufacture of various rubber products
 Polyurethane and polyurethane-containing composition for gluing and thickening / 2261875
Invention relates to thermoplastic plastics, in particular, to polyurethane and composition containing thereof used for gluing and thickening. Invention describes polyurethane prepared by interaction of: a) polyisocyanate or mixture of two or more polyisocyanates with b) polyol or mixture of two or more polyols comprising simple polyether with molecular mass 4000 Da, not less, polydispersity value 1.5, not above, or hydroxyl functionality from 1.8 to 2.0, or polydispersity value 1.5, not above, and hydroxyl functionality from 1.8 to 2.0, or by a mixture of two or more such simple polyethers in the presence of a component of the general formula (I) given in the appendix 1. After reaction termination polyurethane has at least one silane group able to react with water or its mixture with isocyanate group. Also, invention describes a composition used for thickening and gluing containing a plasticizing agent in mixture with indicated polyurethane and other polyurethane with molecular mass 8000 Da, not above, and at least by 3000 Da less as compared with this value for the first indicated polyurethane. Proposed compositions comprising the claimed polyurethane are useful as contact, single- or two-component glue, thickening mass with rupture elongation up to 287% and destroying charge up to 0.49 N/mm2 and used in sealing seams and surfaces.
Method for preparing hardening agent / 2272046
Invention relates to a method for preparing a hardening agent for polyurethane compositions based on oligodiene rubbers. Invention describes a method for preparing a hardening agent for polyurethane compositions consisting of the following components, wt.-%: oligodiene urethane prepolymer, 80-91; 20% solution of triphenylmetane triisocyanate in dichloroethane, or 27% solution of triphenylmethane triisocyanate in ethyl acetate, 7-13, and, optionally, transformer oil, 0-10. The process is carried out in the range of temperatures 55-65°C, under residual pressure 1333 Pa for 6 h. Invention provides preparing polyurethane compositions possessing the rupture strength value at the level 38 kgf/cm2, relative elongation 350-600%, elasticity modulus at 50°C at the level 41 kgf/cm2 and adhesion strength to ballistic fuel 41 kgf/cm2. Proposed compositions are able to provide working ability of articles in the range of temperature from -50°C to +50°C.
Adhesion enhancer for monomer-free reactive polyurethanes / 2272818
Invention relates to compositions based on polyols and high-molecular weight diisocyanates with low monomer content as well as to a method for preparation of indicated compositions as binders for reactive glues. In particular, invention provides reactive polyurethane composition based on polyols and high-molecular weight diisocyanates prepared by reaction of diols having average number molecular weight mot higher than 2000 with monomeric diisocyanates having molecular weight not higher than 500. Thus obtained high-molecular weight diisocyanates have maximum monomer content 10%. Invention also describes a method for preparation of indicated composition. Thus obtained compositions are used as glues/hermetics imparting improved adhesion characteristics and having significantly reduced contents of health-detrimental monomeric diisocyanates having molecular weight below 500. For instance, resistance to detachment of film attached to surface using claimed glue is 4.3 N/mm, heat resistance lies at a level of 148°C, and frost resistance below -30°C.
 Method for preparing phosphorus-boron-containing polyurethans / 2275388
Invention relates to a field for preparing elastic phosphorus-boron-containing polyurethans. Invention describes a method for preparing phosphorus-boron-containing polyurethane by interaction of prepolymer prepared by interaction of hydroxyl-containing compound with di-isocyanate in the mole ratio OH : NCO-groups = 1:2 with phosphorus-boron-containing polyol of the formula (I):
Polyurethane composition / 2283851
Invention relates to polymer compositions including at least one polyurethane prepolymer A with isocyanate terminal groups obtained from at least one polyisocyanate with at least one polyol A1 and, if necessary, with at least one polyol A2. wherein A1 is linear polyoxyalkylenepolyol with unsaturation degree ,less than 0.04 m-equ/g; A2 is polyol, which is present in amount 0-30%, preferably 0-20%, in particular 0-10% based on total amount A1+A2; and at least one polyaldimine B. Composition is a mixture of polyurethane prepolymer A with polyaldimine B. In absence of moisture, such compositions are stable on storage. When being applied, such compositions are brought into contact with moisture, after which polyaldimines are hydrolyzed into aldehydes and polyamines, and polyamines react with polyurethane prepolymer containing isocyanate groups. Products obtained from such composition possess very wide spectrum of properties, including tensile strength varying within a range from 1 to 20 MPa and ultimate elongation above 1000%. Composition may be used as glue, hermetic, coating, or facing.
 Polyaldimine-containing polyurethane composition / 2291162
Invention relates to moisture-hardenable polyurethane compositions, namely to those containing at least one polyurethane prepolymer with isocyanate groups obtained from at least one polyisocyanate and at least one polyol. In addition to prepolymer, composition further contains at least one polyaldimine prepared from at least one polyamine with primary aliphatic amino groups and at least one aldehyde of general formula:
Prepolymer, polyol composition and method for preparing elastic foam material / 2320676
Invention relates to prepolymer with terminal isocyanate groups and characterizing the NCO-number value in the range 5-30 wt.-%, and representing a reaction product of excessive amount of diphenylmethane diisocyanate comprising at least 80 wt.-% of 4,4'-diphenylmethane diisocyanate and polyoxyethylene polyoxypropylene polyol of the mean molecular mass in the range 2000-10000 Da, average nominal hydroxy-functionality in the range 2-6, the content level of ethylene oxide in the range 21-45 wt.-%, and the presence of structure relating to type -PO-PO/EO-EO wherein PO-block comprises 60-90% of PO, and the ratio of terminal EO : statistically distributed EO is in the range from 3:1 to 1:3. Also, invention relates to polyisocyanate composition used for preparing polyurethanes and characterizing by NCO-number value maximally 52.5 wt.-% comprising 1-99 mass parts of the claimed prepolymer and 1-99 mass parts of other polyisocyanate per 100 mass parts of this polyisocyanate composition. Also, invention relates to a method for preparing elastic foam polyurethane from prepolymer or polyisocyanate composition corresponding to the invention as result of carrying out reaction in press-form at index in the range 70-120. Such elastic foam polyurethanes show improved stability and characterized by improved rigidity and good additional properties, for example, strength, residual compression deformation, indices of creep, elasticity, ability for vibration transferring, relative elongation and pleasant by feel. Foam materials made of such prepolymer or composition are used in furniture and automobile branches of industry in making seats, steering wheels, instrument board, furniture and mattress soft packing, and for sound damping and sound insulation.
Hermetising polymeric composition / 2332431
Invention relates to hermetising polymeric composition, which is applied in machine-building and construction. The said composition includes with definite ratio of components: forpolymer, simple oligoether, filler and wastes of elastic foampolyurethane; as forpolymer it contains forpolymer based on polyoxitetramethilenglycol and toluilendiisocyanate, as simple oligoether - simple oligoether based on glycerol, propylene oxide and ethylene oxide of molecular weight 3600, and additionally contains polyisocyanate type B, tiodiethylene glycol and tin octoate. The composition contains definite composition of components, as a result of which breaking strength of hermetics based on such composition increases 2-3 times and remanent elongation reduces 4-6 times.
 Multicomponent local foam system and method of fracture and/or through orifice sealing in building walls and/or partitions / 2346957
Invention concerns multicomponent local foam system for obtaining foam polyurethanes for local construction purposes, consisting of polyisocyanate (component A), and polyene containing water (component B), stored in separate containers, and epoxy resin based on bisphenol A and bisphenol F, and/or siloxane forpolymer with average mol weight from 200 g/mol to 10000 g/mol with reactive end alcoxy groups (component C), generic catalyst for polyurethane generation reaction and/or generic binding agent for siloxane forpolymer (component D) in spatially divided form, and optional filler, one or more colourants or pigments and generic additives. When mixed, the components of foam system form interpenetrating polymer mesh structure out of foamed polyurethane and at least one other polymer, with excellent adhesion to adjoining wall material, thus reducing water penetration or forming mechanically stable cork in case of fire to render resistance to fire. Claimed foam system is foaming and solidifying in severe conditions on construction site, e.g. at temperatures from 0°C to 40°C, and non-homogeneously filling of volume.
Double-component material / 2346958
Invention concerns two-pack composition for ground reinforcement by compression in mining and construction engineering. Composition includes forpolymer component based on methylenediphenyldiisocyanate and multiatom alcohol component with several functional groups, mixing and compression of which ensures fast polymerisation, reaction temperature of 130°C, foaming below five times increase of initial volume, mechanical tension of 1 MPa by ageing for 30 minutes to 5 hours after gluing, and devoid of significant fissuring caused by internal tension during polymerisation. Limited reaction capability is achieved by volumetric mixing of components at 1:1 ratio of methylenediphenyldiisocyanate forpolymer with N=C=O number from 18 to 24, preferably 22, to multiatom alcohol with several functional groups maintaining N=C=O number from 1.1 to 1.4, and ensures good adhesion to carrier. One of the composition components includes foam suppressant consisting of non-ion surfactants and non-saponifying substances.
 Method of preparing coating additive containing metal-containing nanoparticles, and obtained product / 2455321
Invention relates to a method of producing an additive used in paint and lacquer for endowing them with defined properties, particularly biocidal and electrical properties which protect from the effect of UV radiation and prevent inflammation. The method is based on using metal nanoparticles, which can be in a water-organic medium or alternatively in form of dry powder, e.g., Ag, Au, Cu and Bi, subjected to treatment which enables to include them into coatings used in a wide range of ambient conditions. The method involves use of solvents, surfactants, dispersants and resins which makes the additive compatible with the end coating.
|
(57) Abstract: Use: for processing natural and synthetic leather, impregnation of fabrics, fibrous bases, to obtain coatings, adhesives, dekeling materials. The inventive anionic aqueous dispersion based on polyetherurethane obtained by interaction selecionado prepolymer and the reaction product oxyalkylene xylitol with maleic anhydride, neutralized tertiary amine, is treated by stirring Hydrosol of silicon dioxide, taken in an amount of 0.7 to 5.0% by weight dispersion calculated on the dry matter. table 1. The invention relates to the field of production of modified aqueous dispersions of polyetherurethane (PES) anionic type used for processing natural and synthetic leather, impregnation of fabrics, fibrous bases, coatings, adhesives, dekeling materials, etc. and can be used in various industries. According to the method of anionic groups in PES introduced by sulfonation of diisocyanates or synthesized on the basis of prepolymers. The disadvantage of this method: the large particle size (a few microns), the instability dispersant in the aqueous phase of an acetone solution of the reaction product of isocyanate prepolymer and chain extension of the polyester acid ester-based polycarboxylic anhydride acid (phthalic, trimellitate, andtobago, tetrahydrophthalic) and trimethylolpropane or trimethyloctane. Before dispersing in water the acid groups in the reaction product chain extension and prepolymer neutralized tertiary amine by dimethylethanolamine. The formation of a salt of the group required for the formation of ionic centers on the surface of the particle dispersion, to prevent its coagulation. There is a method by which water anionic PES variance is obtained by interaction of prepolymer containing terminal isocyanate groups with a chain extension in the environment of acetone with subsequent dispersion in water. With the aim of increasing the solids content of the dispersion while reducing its viscosity and stability when stored as a chain extension using neutralized with triethylamine, the reaction product oxyalkylene xylitol mol.m. 670-1104 with maleic ingerido. A film molded from the PES variance, obtained by a known method, transparent, but they do not have sufficient hydrophobicity required in some applications (processing synthetic leather, impregnation of fabrics for special purposes), as well as dorechester performance films and coatings, obtained on the basis of aqueous anionic PES dispersions, as well as improving the adhesion of coatings to substrates. This goal is achieved by the fact that in aqueous anionic PES variance is introduced Hydrosol of silicon dioxide (SiO2) in an amount of from 0.7 to 5% by weight dispersion calculated on the dry matter. Aqueous anionic PES variance is obtained by interaction in the environment of acetone prepolymer containing terminal isocyanate groups, with chain extension, obtained by the reaction of oxyalkylene xylitol with maleic anhydride and containing from one to three carboxyl groups neutralized tertiary amine, followed by dispersing the resulting product in water. P R I m e R 1. A 45% aqueous dispersion of PES based on the isocyanate of prepolymer obtained in the reaction of polyoxypropyleneglycol mol.m. 1000 and 4,4'-diphenylmethanediisocyanate, and chain extension reaction product of ethoxylated xylitol mol.m. 670 with maleic anhydride containing two carboxyl groups neutralized with triethylamine, are introduced with stirring 0.2 wt. (in relation to PES) Hydrosol SiO2with a particle size of SiO26 nm. From the obtained modified aqueous anionic PES dispersal: hygroscopicity of 25.1% absolute lagoudaki 24,8% relative lagoudaki 898,8% conditional stress at 100% elongation of 1.1 MPa, conditional stress at 300% elongation of 2.2 MPa, ultimate tensile strength of 7.3 MPa, adhesion to the front layer of the IC 43,3 g/see P R I m m e R 2. In the dispersion according to example 1 are introduced with stirring, 0.7 wt. (in relation to PES) Hydrosol SiO2with a particle size of 6 nm. From the obtained modified aqueous anionic PES variance cast film on a glass substrate and on the front layer of the IC. Properties of the obtained films: hygroscopicity 24% absolute lagoudaki 22% relative lagoudaki of 91.6% conditional stress at 100% elongation of 1.3 MPa, nominal stress at 300% elongation of 2.6 MPa, ultimate tensile strength of 10.5 MPa, adhesion to the front layer of the IC 54 g/see P R I m e R 3. In the dispersion according to example 1 are introduced with stirring, 2.0 wt. (in relation to PES) Hydrosol SiO2with a particle size of 6 nm. From the obtained modified aqueous anionic PES variance cast film on a glass substrate and on the front layer of the IC. Properties of the obtained films: hygroscopicity of 19.4% absolute lagoudaki 18,5% relative lagoudaki 95.3% of the conditional stress at 100% elongation of 1.4 MPa, nominal stress at 300% elongation of 2.56 MPa, ultimate tensile strength of 11.7 MPa adhesion to the front layer of the IC 59 g is Olya SiO2with a particle size of 6 nm. From the obtained modified aqueous anionic PES variance cast film on a glass substrate and on the front layer of the IC. Properties of the obtained films: hygroscopicity 20,0% absolute lagoudaki 18,2% relative lagoudaki 91,0% conditional stress at 100% elongation of 2.5 MPa, nominal stress at 300% elongation of 4.6 MPa, ultimate tensile strength of 14.9 MPa adhesion to the front layer of the IC 61 g/see P R I m e R 5. The dispersion of example 1 was diluted with water to a content of the polymer 40 wt. In the resulting dispersion is injected under stirring 0.3 wt. (in relation to PES) Hydrosol SiO2with a particle size of SiO26 nm. From the obtained modified aqueous anionic PES variance cast film on the glass substrate and the outer layer of the IC. Properties of the obtained films: hygroscopicity of 24.5% absolute lagoudaki 23,7% relative lagoudaki 96.7% of conventional stress at 100% elongation of 1.0 MPa, nominal stress at 300% elongation of 2.05 MPa, ultimate tensile strength 6,82 MPa adhesion to the front layer of the IC 43 g/see P R I m e R 6. In the dispersion according to example 5 are introduced with stirring to 1.0 wt. (in relation to PES) Hydrosol SiO2with a particle size SiO and on the front layer of the IC. Properties of the obtained films: hygroscopicity of 18.5% absolute lagoudaki 17,8% relative lagoudaki 96,2% conditional stress at 100% elongation of 1.2 MPa, nominal stress at 300% elongation of 2.4 MPa, ultimate tensile strength of 10.0 MPa, adhesion to the front layer of the IC 51 g/see P R I m e R 7. In the dispersion according to example 5 are introduced with stirring, 2.0 wt. (in relation to PES) Hydrosol SiO2with a particle size of SiO26 nm. From the obtained modified aqueous anionic PES variance cast film on a glass substrate and on the front layer of the IC. Properties of the obtained films: hygroscopicity of 17.9% absolute lagoudaki 15,9% relative lagoudaki 88.8% of the conditional stress at 100% elongation of 1.1 MPa, nominal stress at 300% elongation of 2.3 MPa, ultimate tensile strength of 12.2 MPa adhesion to the face layer SC 55 g/see P R I m e R 8. In the dispersion according to example 5 are introduced with stirring 5.0 wt. (in relation to PES) Hydrosol SiO2with a particle size of SiO26 nm. From the obtained modified aqueous anionic PES variance cast film on a glass substrate and on the front layer of the IC. Properties of the obtained films: hygroscopicity of 12.2% absolute lagoudaki 8,1% relative humidity the Affairs of the tensile strength of 16.2 MPa, adhesion to the front layer of the IC 58,0 g/see P R I m e R 9. In the dispersion according to example 5 are introduced with stirring, 8.0 wt. (in relation to PES) Hydrosol SiO2with a particle size of 6 nm. From the obtained modified aqueous anionic PES variance cast films on glass substrate. Properties of the obtained films: hygroscopicity 10% absolute lagoudaki 8,2% relative lagoudaki 82,0% Physical-mechanical properties, including strength, can not be determined, because the film is inhomogeneous, have numerous defects, cracks, folds. P R I m e R 10. The dispersion of example 1 was diluted with water to a content of PES 35 wt. In the resulting dispersion is injected 0.2 wt. (in relation to PES) Hydrosol SiO2with a particle size of 6 nm. From the obtained modified aqueous anionic PES variance cast film on a glass substrate and on the front layer of the IC and dried at room temperature. Properties of the obtained films: hygroscopicity 25.3% of the absolute lagoudaki 24,6% relative lagoudaki 97,2% conditional stress at 100% elongation of 0.8 MPa, nominal stress at 300% elongation of 1.5 MPa, ultimate tensile strength of 6.2 MPa adhesion to the front layer of the IC 41,3 g/see P R I m e R 11. In dispers>6 nm. From the obtained modified aqueous anionic PES variance cast film on a glass substrate and on the face of the layer of synthetic skin (SK). Properties of the obtained films: hygroscopicity 22% absolute lagoudaki 19,6% relative lagoudaki 89,0% conditional stress at 100% elongation of 1.0 MPa, nominal stress at 300% elongation of 1.9 MPa, ultimate tensile strength of 8.0 MPa, adhesion to the front layer of the IC 50 g/see P R I m e R 12. In the dispersion according to example 10 are introduced with stirring, 2.0 wt. (in relation to PES) Hydrosol SiO2with a particle size of SiO26 nm. From the obtained modified aqueous anionic PES variance cast film on a glass substrate and on the front layer of the IC. Properties of the obtained films: water absorption at 22.5% absolute lagoudaki 19,8% relative lagoudaki 88,0% conditional stress at 100% elongation of 1.7 MPa, nominal stress at 300% elongation of 2.6 MPa, ultimate tensile strength of 11.5 MPa adhesion to the front layer of the IC 52,0 g/see P R I m e p 13. In the dispersion according to example 10 is injected under stirring to 4.0 wt. (in relation to PES) Hydrosol SiO2with a particle size of 6 nm. From the obtained modified aqueous anionic PES variance cast planlagte 18,1% relative lagoudaki 88,2% conditional stress at 100% elongation of 1.8 MPa, conditional stress at 300% elongation of 2.7 MPa, ultimate tensile strength 12,0 MPa adhesion to the front layer of the IC to 53.0 g/see P R I m e R 14. In the dispersion according to example 10 are introduced with stirring 0.2 wt. (in relation to PES) Hydrosol SiO2with a particle size of SiO2of 12.8 nm. From the obtained modified aqueous anionic PES variance cast films on glass substrate. Properties of the obtained films: hygroscopicity of 25.8% absolute lagoudaki 24,9% relative lagoudaki 96.5% of conventional stress at 100% elongation of 0.9 MPa, nominal stress at 300% elongation of 1.6 MPa, ultimate tensile strength of 6.7 MPa. P R I m e R 15. In the dispersion according to example 10 are introduced with stirring to 1.0 wt. (in relation to PES) Hydrosol SiO2with a particle size of SiO2of 12.9 nm. From the obtained modified aqueous anionic PES variance cast films on glass substrate. Properties of the obtained films: water absorption at 22.5% absolute lagoudaki 21,5% relative lagoudaki 95.5% of conventional stress at 100% elongation of 1.2 MPa, nominal stress at 300% elongation of 2.1 MPa, ultimate tensile strength of 9.5 MPa. P R I m e R 16. In the dispersion according to example 10 are introduced with stirring 2,0 the aqueous anionic PES variance cast films on glass substrate. Properties of the obtained films: hygroscopicity of 18.5% absolute lagoudaki 17,0% relative lagoudaki 91,9% conditional stress at 100% elongation of 1.35 MPa, nominal stress at 300% elongation of 2.5 MPa, ultimate tensile strength of 11.4 MPa. P R I m e R 17 (comparative). Of the dispersion from example 10 (without SiO2) cast film on a glass substrate and on the front layer of the IC. Properties of the obtained films: hygroscopicity of 25.8% absolute lagoudaki 24,9% relative lagoudaki 96.5% of conventional stress at 100% elongation of 0.75 MPa, nominal stress at 300% elongation of 1.5 MPa, ultimate tensile strength of 6.1 MPa adhesion to the front layer of the IC 41,0 g/see P R I m e R 18 (comparative). From the dispersion according to example 5 (without SiO2) cast film on the glass substrate and the outer layer of the IC. Properties of the obtained films: hygroscopicity 24.4% of the absolute lagoudaki 23,5% relative lagoudaki 96,3% conditional stress at 100% elongation of 1.05 MPa, nominal stress at 300% elongation of 2.0 MPa, ultimate tensile strength of 6.7 MPa adhesion to the front layer of the IC 42.5 g/see P R I m e R 19 (comparative). From the dispersion of example 1 (without SiO2) cast films on glass padlo,4% conditional stress at 100% elongation of 1.1 MPa, conditional stress at 300% elongation of 2.15 MPa, ultimate tensile strength 7,32 MPa. As can be seen from the table, the introduction of Hydrosol SiO2in aqueous anionic PES variance in the amount of 0.7 to 5 wt. (in relation to PES) allows to increase the hydrophobicity and strength properties of the films obtained from the PES variance, as well as to increase their adhesion to the front layer of synthetic leather. So, with the introduction of 4 wt. SiO2(in relation to PES) in 45% PES variance observed decrease of hygroscopicity films 20.3% water-yielding capacity by 26.3% increase in nominal stresses at 100% elongation of films on 127,2% at 300% elongation at 114%, the maximum tensile stress at 104% increase adhesion to the face layer of the IC 41.8%With the introduction of a 5 wt. SiO2(in relation to PES) in 40% PES variance observed reduction of the hygroscopicity of the film at 50% water-yielding capacity by 65.5% elongation nominal stresses at 100% elongation of the film at 167% at 300% elongation at 165% of the ultimate tensile strength by 142% increase adhesion to the face layer SC 36.4% With the introduction of 4 wt. SiO2(in relation to PES) in 35% PES variance observed decrease of hygroscopicity films 20.5% water-yielding capacity of 27 the STI tensile on 96,7% increase adhesion to the face layer of the IC on 29.3% of the film Properties are given in the table. The modification of WATER ANIONIC POLYETHERURETHANES DISPERSIONS by reacting the isocyanate prepolymer and the reaction product oxyalkylene xylitol with maleic anhydride, neutralized tertiary amine, characterized in that, in order to increase the hydrophobicity and structural properties of films and coatings obtained on the basis of dispersions, as well as improving the adhesion of coatings to substrates, in the dispersion with stirring, optionally enter a Hydrosol of silica in the amount of 0.7 to 5.0% by weight dispersion calculated on the dry matter.
|