Abstract: The invention herein relates to a surface protective dendritic polymer coating compositions and to the cross-linked surface protective coatings formed thereby.

Abstract: A surface treatment for a protective plastic film and/or laminate is disclosed. Suitably, the surface treatment includes coating a major surface of the plastic film or laminate with a curable coating formulation wherein the one or more of the coating ingredients are diffused or migrated at least partially into the plastic film or plastic laminate. The migration of coating ingredients creates a gradual transition layer from the plastic film to the coating layer and leads to unique properties. Optionally, the surface treated plastic film is laminated to a release liner coated with a pressure sensitive adhesive (PSA) to form the aforementioned laminate.

Abstract: Disclosed is a gas-barrier film laminate having at least two gas-barrier film layers laminated via an adhesive layer, wherein the gas-barrier film layer has a substrate film, and at least one constitutive unit layer comprising an anchor coat layer and an inorganic thin film layer formed on at least one surface of the substrate film in that order, and wherein the number of the bubbles having a diameter of at least 0.5 mm and the impurities having a diameter of at least 0.5 mm existing between the gas-barrier film layers is at most 3 in total per 100 cm2.

Abstract: To provide an electrically conducting member for electrophotography that has made itself kept from increasing in electrical resistance with time even in a low temperature and low humidity environment and also has made any ion conducting agent kept from bleeding to its surface. To also provide a process cartridge, and an electrophotographic image forming apparatus, that can stably form high-grade electrophotographic images over a long period of time in a variety of environments. The conductive member for electrophotography has an electrically conducting substrate and an electrically conducting layer, and the electrically conducting layer contains a resin having in the molecule at least one structure selected from structures represented by the formula (1), formula (2) and formula (3) each defined in the specification. The process cartridge and the electrophotographic image forming apparatus each make use of the same.

Abstract: The purpose of the present invention is to provide a two-part curable oxygen-absorbable resin composition which has all of oxygen absorbability, adhesion properties and a cohesive force. The present invention provides a two-part curable oxygen-absorbable resin composition comprising: a main component which comprises a polyester polyol containing tetrahydrophthalic acid or a derivative thereof or tetrahydrophthalic acid anhydride or a derivative thereof as a raw material; and an aliphatic and/or alicyclic isocyanate curing agent component.

Abstract: The present invention relates to novel waterborne adhesives which are polymerisable by UV light and are capable of being activated by heat, and which particularly display good adhesion to difficult substrates, such as ethylene vinyl acetate copolymers (EVA) with a low vinyl acetate content, or rubber. The invention further provides a novel method in which, after the application of the waterborne adhesive to an article and drying, irradiation with UV light and at the same time or thereafter activation by heat are performed. The adhesive film which is irradiated and activated in this way is then bonded to a further article. The invention also provides the use of the adhesives to make items such as shoes.

Abstract: The present invention relates to the use of aqueous UV-reactive primers for the coating of substrates based on ethylene vinyl acetate copolymers (EVA copolymers) or rubber. The present invention further provides a novel method for joining articles using an aqueous UV-reactive primer.

Abstract: A gas barrier laminate having an undercoating (A) which comprises a main resin, an isocyanate type curing agent and an alkaline compound of a polyvalent metal; and a barrier layer (B) of a polycarboxylic acid polymer forming an ionic crosslinking due to the polyvalent metal among the carboxyl groups; formed on at least one surface of a plastic base material (P), wherein a region (b) free of the alkaline compound of the polyvalent metal is formed in the undercoating (A) on the side of the barrier layer (B), the content of nitrogen in the region (b) being larger than the content of nitrogen in the undercoating (A) other than the region (b), the gas barrier laminate having excellent gas barrier property, retort resistance, producibility as well as excellent flexibility without developing interlayer peeling even if it is folded and featuring excellent interlayer adhesion.

Abstract: High barrier multilayer films incorporating a biodegradable polymer layer. More particularly, biodegradable multilayer films for use as book coverings and packaging materials. The multilayer films have excellent moisture barrier and curl resistance properties.

Abstract: Aqueous polyurethane-polyurethane urea dispersions comprising a reaction product of: (i) an NCO prepolymer prepared from; (A) one or more di- or higher-functional polyols having a mean molecular weight of 400 to 5000 daltons, (B) optionally one or more di- or higher-functional polyol components having a molecular weight of from 62 to 399 daltons, and (C) one or more di- or poly-isocyanate components; and (ii) a mixture (D) of primary and/or secondary monoamino compounds (D1) and primary and/or secondary diamino compounds (D2); wherein at least one of the amino compounds of the mixture (D) has a functional group selected from sulfonates and carboxylates; wherein mixture (D) has a mean amino functionality of 1.65 to 1.95; and wherein the equivalent ratio of NCO groups in the NCO prepolymer to the total amount of isocyanate-reactive groups of the mixture (D) is 1.04 to 1.9; to processes for their preparation and to use thereof in the production of adhesive composites.

Abstract: A polyurethane or polyurea coating for use in protecting a leading edge substrate on an airfoil against liquid or solid particle erosion, the composition made from an isocyanate-terminated prepolymer and curing agents, such as polyaspartic esters, aldimines and ketimines with optional flatting agent for matte coatings.

Abstract: A film for a backlight unit including a semiconductor nanocrystal-polymer composite film including a semiconductor nanocrystal and a matrix polymer in which the semiconductor nanocrystal is dispersed, wherein the matrix polymer is a polymer produced by a polymerization of a multifunctional photo-curable oligomer, a mono-functional photo-curable monomer, and a multifunctional photo-curable cross-linking agent, the multifunctional photo-curable oligomer has an acid value of less than or equal to about 0.1 mg of KOH/g, and a content (A1) of a first structural unit derived from the multifunctional photo-curable oligomer, a content (A2) of a second structural unit derived from the mono-functional photo-curable monomer, and a content (A3) of a third structural unit derived from the multifunctional photo-curable cross-linking agent satisfy Equation 1: A1<(A2+A3).

Abstract: Laminates made from films and powders of N-halochitosan are provided. The films and laminates can be used to make a variety of finished articles that can be used to provide protection from hazardous chemical and biological agents.

Abstract: Disclosed are solar-reflective roofing and other building materials having high reflectance of near-infrared radiation and high transmission of radiation in the visible light range and a substantial emissivity so as to reduce the heat island effects experienced by the articles while also maintaining an aesthetically pleasing appearance. Also disclosed are related methods for fabrication of such materials.

Abstract: Disclosed herein are substrates which have been dry coated with a layered material. Generally, a layered material precursor composition is mixed with a milling medium so that the milling medium is coated with the layered material. The substrate is then contacted with the coated milling medium. The layered material on the milling medium transfers to the substrate to form a coating on the substrate. In particular, conductive films can be formed on a substrate without the need for additives such as a surfactant or a polymeric binder.

Abstract: Methods of the invention include those for applying protective sheets to articles. According to these methods and resulting articles, a protective sheet is applied to at least a portion of an exterior surface where protection is desired on an article. At least one portion of at least one exterior surface of the article to be protected can be integrally formed in the presence of the protective sheet. Improved bonding of the protective sheet to the article and improved processing efficiency are advantageously achieved according to the invention.

Abstract: The invention relates to a formulation for an antifouling coating system to be applied on submerged substrates. The invention is characterized in that the formulation contains at least 30 wt % of water relative to the total weight thereof, at least 10 wt % relative to the total weight thereof of a dry extract of a waterproofing agent selected from a silicone resin, a polyurethane resin, and/or a styrene acrylic copolymer resin either alone or mixed, and at least 5 wt % relative to the total weight thereof of a dry extract of an active anti-adhesion agent. The invention also relates to a method for processing substrates to be submerged using such a formulation, and to the use of such a formulation as an antifouling agent for deterring the attachment of marine organisms such as algae, shellfish and other crustaceans on any submerged substrate, and in particular ship hulls.

Abstract: To provide a composite film having low-temperature flexibility. The composite film including an acrylic polymer and a urethane polymer, in which the acrylic polymer includes an acryl component containing at least an acrylic acid-based monomer and a monofunctional acrylic monomer whose homopolymer has a glass transition temperature (Tg) of 273 K or more; the content of said acrylic acid-based monomer in said composite film is from 0.5 to 15 wt %; the glass transition temperature (Tg ac) of the acrylic polymer is 273 K or more; the glass transition temperature (Tg ur) of the urethane polymer is 273 K or less; and the glass transition temperature (Tg) of the composite film is 269 K or less.

Abstract: Super-low fouling sulfobetaine and carboxybetaine materials, super-low fouling surfaces and methods of making the surfaces coated with sulfobetaine and carboxybetaine materials, and devices having the super-low fouling surfaces.

Abstract: Methods of the invention include those for applying protective sheets to composite articles. According to these methods and resulting composite articles, a protective sheet is applied to at least a portion of an exterior surface formed from a composite material and where protection is desired. At least one exterior surface of the composite article to be protected can be integrally formed in the presence of the protective sheet. Improved bonding of the protective sheet to the composite article and improved processing efficiency are advantageously achieved according to the invention.

Abstract: Described herein are compounds generally comprising an indeno[2?,3?:3,4]naptho[1,2-b]pyran structure. Such compounds may be useful for their photochromic properties, and be used in certain photochromic compositions. Such compositions may further comprise other photochromic compositions and/or materials. Additionally, such compounds and/or compositions may be suitable for preparing certain photochromic articles. Also described herein are methods for preparing certain photochromic compounds, compositions, and articles.

Abstract: A method for producing a multi-layer decorating element includes the steps of: (a) providing a base, a first plate, a second plate and an adhesive layer; (b) stacking the first and second plates onto one of the base and the adhesive layer; (c) stacking the other of the base and the adhesive layer onto one of the base and the adhesive layer to form a stacked array; (d) hot pressing the stacked array; and (e) removing the adhesive layer.

Abstract: A film (1) for construction with at least one functional layer (2) and optionally at least one other layer, especially a carrier layer and/or reinforcing layer (3), the functional layer (2) having a water vapor diffusion resistance (sd value) that is dependent on the ambient humidity. The functional layer (2) has at least one material (4) that can be obtained from a renewable raw material, especially at least one polymer based on a renewable raw material. A method of applying a functional layer to building construction involves installing the functional layer as a vapor control layer over rafters of a building either inside, outside or in a loop shape, or alternatively, installing the functional layer as a vapor control layer barrier in a sheeted roof, ceiling or façade region of a building as at least one of an underform web and a counter ceiling web.

Abstract: The invention relates to an adhesive composition that can be cross-linked by heating, said composition comprising between 20 and 85% of a polyurethane comprising 2 terminal groups of the hydrolysable alkoxysilane type of formula (I): wherein: R1 is a hydrocarbonated radical comprising between 5 and 15 carbon atoms; R2 is an alkylene radical comprising between 1 and 4 carbon atoms; R3 is an alkylene radical comprising between 1 and 3 carbon atoms; R4 and R5 are each an alkyl radical comprising between 1 and 4 carbon atoms; n is a whole number such that the average molar mass of the polyether block of formula —[OR2]n- is between 300 Da and 30 kDa; in is a whole number such that the average molar mass of the polymer of formula (I) is between 600 Da and 60 kDa; and p is a whole number equal to 0, 1 or 2. The composition also comprises between 15 and 80% of a compatible tackifying resin; and between 0.01 and 3% of a cross-linking catalyst.

Abstract: The present invention relates to a rigid polyurethane foam comprising reinforcing materials which can be obtained by mixing (a) isocyanates which have a viscosity at 25° C. of less than 500 mPas with (b) compounds having groups which are reactive toward isocyanates, (c) blowing agents comprising water, (d) catalysts and, if appropriate, (e) further additives to form a reaction mixture and applying the reaction mixture to a reinforcing material, wherein the compounds (b) having groups which are reactive toward isocyanates comprise a polyetherol (b1) having a functionality of 4 or more and a viscosity at 25° C. of 10 000 mPas or less and a polyetherol (b2) having a functionality of 3 or less and a viscosity at 25° C. of 500 mPas or less. The present invention further relates to a process for producing such rigid polyurethane foams and the use of the rigid polyurethane foams for the insulation of liquefied natural gas tanks.

Abstract: To provide an adhesive sheet for protecting coating films which is excellent in the adhesion between a coating layer and a composite film, and has weather resistance. The adhesive sheet for protecting coating films is one comprising a base layer and an adhesive layer, and the base layer has a coating layer produced by using the fluoroethylene vinyl ether alternating copolymer having a specific structure on one surface of a composite film containing an acrylic polymer and a urethane polymer. It is preferable that the coating layer is cross-linked with a composite film and has cross-linked points.

Abstract: A roofing repair system including a multi-part primer and a water-activated overcoat composition. The multi-part primer includes a first part including a hydroxyl-functional (meth)acrylic (co)polymer, and a second part including a mixture of a hydrophilic polyfunctional aliphatic polyisocyanate and a hydrophobic polyfunctional aliphatic polyisocyanate, wherein a molar ratio of hydroxyl functionality in the first part to isocyanate functionality in the second part is less than 1. The water-activated overcoat composition includes at least one compound selected from polyketimines having amino groups attached to secondary carbon atoms, polyenamines, and oxazolidines. In some exemplary embodiments, the volume ratio of the multi-part primer to the water-activated composition is from 5:1 to 7:1. In certain exemplary embodiments, the multi-part primer is substantially free of organic solvents.

Abstract: The invention relates to a powder resin with amp from 60 to 110° C., and a particle size from 10 to 250 ?m, which comprises the reaction product of a reactive composition comprising: a) an isocyanate component comprising a polyisocyanate with functionality of at least 2, b) an alcoholic component, comprising: b1) at least one polyol with OH functionality from 2 to 4, b2) a monoalcohol component comprising: b2.1) a monoalcohol, bearing an ethylenic unsaturation b2.2) a saturated alcohol selected from the group of fatty alcohols, b2.3) optionally, an additional saturated monoalcohol from non fatty monoalcohols the molar ratios of OH functional groups, of the said alcoholic components b2.2) (possibly b2.3)) and b2.1) being defined so that the OH molar ratio of b2.2)/b2.1) or of [b2.2)+b2.3)]/b2.1) ranges from higher than 0.

Abstract: A laminate for stretch-forming includes: a polyglycolic acid-based resin layer containing 100 parts by mass of a polyglycolic acid-based resin and 0.5 parts by mass or more and 10 parts by mass or less of at least one thermoplastic elastomer selected from the group consisting of polyester-based thermoplastic elastomers and polyurethane-based thermoplastic elastomers; and a thermoplastic resin layer adjacent to the polyglycolic acid-based resin layer, as well as a stretched laminate is obtained by stretching the same.

Abstract: The present invention provides dynamic charge state cationic polymers that are useful for delivery of anionic molecules. The dynamic charge state cationic polymers are designed to have cationic charge densities that decrease by removal of removable functional groups from the polymers. The present invention also provides interpolyelectrolyte complexes containing the polymers complexed to a polyanion. Methods for using the interpolyelectrolyte complexes to deliver anionic compounds are also provided.

Abstract: A method for applying a multicolored paint system to a substrate includes (1) applying a first pigmented coating material to the substrate, (2) drying and/or curing the first pigmented coating material at a selected drying and/or curing temperature, and (3) applying a second pigmented coating material to the substrate, with partial recoating of the first pigmented coating material, wherein the second pigmented coating material is applied using a laminate including a carrier on which there is a layer of the second pigmented coating material, the layer being already cured.

Abstract: A method for producing a decorative element includes the steps of: (a) preparing a thermoplastic polyurethanes (abbreviated TPU) film, at least one ornament, and a releasing film, which has been coated with a glue layer on a plane thereof; (b) disposing the plane of the releasing film coated with the glue layer facing to the ornament; (c) arranging the ornament located between the TPU film and the releasing film to form a stacked array; (d) hot pressing the stacked array.

Abstract: A radiation curable coating for a floor comprising: at least one radiation curable oligomer, at least one photoinitiator and at least one reactive diluent monomer, said radiation curable oligomer being selected from the group consisting of Urethane (meth)acrylates, epoxy (meth)acrylates, polyester (meth)acrylates, acrylic (meth)acrylates, and hydrocarbon (meth)acrylates is described and claimed. The composition is capable of undergoing photopolymerization when coated on a floor and when irradiated by a light emitting diode (LED) light, having a wavelength from about 100 nm to about 900 nm, to provide a cured coating on the floor, with the cured coating having an external surface, and the cured coating having a Percent Reacted Acrylate Unsaturation (% RAU) at the external surface of about 60% or greater. Also described and claimed are the process to coat a floor with the LED curable coating for floor and a coated floor where the coating has been cured by application of LED light.

Abstract: A thermosensitive light-adjusting material is formed by reacting 18-84% polymer polyols and/or terminal hydroxyl-containing polymers which are formed by reacting polymer polyols and diisocyanate, with 15-80% terminal hydroxy-containing ethylenically unsaturated monomers through light or heat polymerization reaction. A process for preparing the thermosensitive light-adjusting material and an optical device comprising thereof. The light-adjusting ability is high, the light-adjusting range is broad, and mechanical capability is good. The preparation method is simple, short-circle, and high effective, so it can be applied in industry, furthermore, because of no organic solvents, the method's advantages are low cost and without pollution.

Abstract: This invention provides emulsions and adhesives comprising proteins that can be isolated from a variety of sources including renewable plant biomass, and methods of making and using such emulsions and adhesives.

Abstract: A frictional pad in combination with a handheld electronic device upon which the frictional pad is adhered and an upward facing support surface upon which the handheld electronic device is selectively disposed and held in a non-adhesive, non-slip fashion by the frictional pad. The frictional pad includes a polyurethane dome adhered to the handheld electronic device by the adhesive film. The dome has a broad, flat shape with an outfacing surface facing the upward facing support surface with a flat and smooth center parallel with the adhesive film and surrounded by a radius perimeter. The outfacing surface of the dome contacts the upward facing support surface and is tacky to releasably hold the handheld electronic device to the upward facing support surface.

Abstract: This invention is related to compositions that can be used to protect surfaces, such as those found on bowling lanes (both synthetic and wood). The compositions are low viscosity and contain little to no VOCs (volatile organic compounds). In one embodiment, the flowable compositions are 100% solids, while in another embodiment, they are solvent-borne compositions that only include VOC-exempt solvents. Regardless of the embodiment, the compositions can be cured via UV LED light to yield scratch, abrasion, and impact resistant coatings.

Abstract: Embodiments of the invention include insulated units and methods of producing the insulating units. The insulating units include a first surface, a structural seal disposed on at least portions of the first surface, and a second surface disposed on the structural seal. The structural seal includes the reaction product of at least one first isocyanate, at least one isocyanate reactive side, and at least one adhesion promoter including a reaction product of at least one secondary aminoalkoxy silane and at least one second isocyanate.

Abstract: The waterborne coating composition herein is useful for promoting adhesion of paint to a component such as a plastic automobile part or accessory. The waterborne coating composition is particularly useful for promoting adhesion of paint to a thermoplastic polyolefin surface. The waterborne coating composition is prepared from a mixture comprising at least one chlorinated polyolefin resin and at least one urethane acrylic hybrid resin. The waterborne coating composition provides not only good adhesion of a paint to a thermoplastic polyolefin surface, but also provides good appearance. The waterborne coating composition is also compatible with a wide variety of paint systems and can be rapidly dried under ambient conditions.

Abstract: A multilayer film may include a polymeric film layer and an absorbing layer on a side of the polymeric film layer. The absorbing layer may be adapted to absorb an odor, a volatile organic compound, or both. The absorbing layer may include a palladium complex and at least one of a cyclodextrin, a hydrophobin protein, and a derivative thereof.

Abstract: The present invention provides a sheet for sealing a rear surface of a solar cell in which degradation due to hydrolysis of the material constituting the solar cell is prevented, and the weather resistance is excellent such that electric output properties of the solar cell can be maintained not only under conditions of actual usage of the solar cell module but also conditions for evaluation under high temperatures and high moistures, and provides a sheet for sealing a rear surface of a solar cell comprising a laminate in which at least two substrates are laminated by an polyurethane-based adhesive, wherein the polyurethane-based adhesive comprises an adhesive having hydrolysis resistance which satisfies the following conditions: condition 1: the lamination strength of the adhesive is 1 N/15 mm or more after keeping the laminate in a chamber which acts as a highly accelerated stress test system under pressurized steam conditions of 105° C. and 1.

Abstract: A multilayered film which is formed using a solventless adhesive, can obviate wetting deficiency even when the film is manufactured by applying the solventless adhesive to a film by coating at a high speed, exhibits the excellent laminate strength and the excellent impact resistance after a liquid content is filled into a packaging container and exhibits excellent environment friendliness, a method of manufacturing the multilayered film, and a packaging container which uses the multilayered film are provided. In the multilayered film which is formed by laminating at least an inner-layer film, an adhesive layer and an outer-layer film in order, the adhesive layer is formed of a solventless adhesive which contains a polyester-based main agent and a curing agent made of aliphatic isocyanate and alicyclic isocyanate.

Abstract: The disclosed method comprises applying a transparent coating composition to a plastics substrate, the composition comprising 30% to 60% by weight of a nanoparticles (B), 15% to 40% by weight, of urethane (meth)acrylates (A1) having 3 to 5 (meth)/acrylate groups per molecule, 0% to less than 10% by weight of urethane (meth)acrylates (A2) having more than 5 (meth)/acrylate groups per molecule, 0% to less than 10% by weight of urethane (meth)acrylates (A3) having less than 3 (meth)/acrylate groups per molecule, 55% to 80% by weight of compounds (C1) having 4 (meth)/acrylate groups per molecule, 0% to 15% by weight of compounds (C2) having 2 (meth)/acrylate groups per molecule, and 0% to 15% by weight of compounds (C3) having 3 (meth)/acrylate groups per molecule, the sum of the weight fractions of film-forming components (A1), (A2), (A3), (C1), (C2), and (C3) being in each case 100% by weight.

Abstract: Scratch resistance and/or reflow of a refinish topcoat is improved by preparing the topcoat from a refinish topcoat coating composition comprising an unsaturated fatty acid ester polyol that does not undergo oxidative cure when the applied refinish topcoat coating composition is cured.

Abstract: The present application is directed to a hardcoat film article comprising a cured hardcoat layer disposed on a release liner, and a thermoplastic layer on the cured hardcoat layer opposite the release liner. The thermoplastic layer has a thickness of at least about 25 micrometers. In other embodiment, the thermoplastic layer is opaque. The release liner comprising a release material formed by irradiating a release material precursor. Additionally, this application is directed to a method of forming a composite film comprising providing a release liner, coating a hardcoat composition onto the release liner to form a hardcoat layer, and curing the hardcoat layer to form a cured hardcoat layer. A thermoplastic layer is disposed onto the cured hardcoat layer to form a hardcoat composite film, and the hardcoat composite film is attached to an adhesive layer opposite the cured hardcoat layer.

Abstract: The mixture of the invention comprises at least one cycloaliphatic polyisocyanate and at least one solvent comprising an ester function and an ether function. An aqueous emulsion can be obtained from this mixture which also comprises a compound bearing a function with a mobile hydrogen, selected from primary or secondary hydroxyl functions, phenol functions, primary and/or secondary amino functions, carboxylic functions and a thiol function or a compound containing precursor functions capable of freeing hydroxyl functions. The emulsion can be used for the manufacture of coatings on a substrate of cement, of wood or especially of leather, and also for the manufacture of adhesives.

Abstract: The invention relates to the use of a two-component composition comprising a polyol component and a polyisocyanate component, for producing polyurethane gel coats for epoxy-resin and vinyl-ester resin composite materials.

Abstract: The invention relates to the use of a solvent-free, 2 component adhesive for adhering sterilizable composite films, wherein the adhesive comprises a component A made from at least one pre-polymer comprised of NCO groups, said pre-polymer produced from low molecular weight polyether alcohols, polyester alcohols and/or polyalkylene alcohols having a functionality of 2 or 3, implemented having a high molar excess of TDI and removal of the unimplemented monomer diisocyanate, and a component B comprising at least one 2 or 3 functional polyesterpolyol, produced from diols and/or triols on the basis of polyethers or polyalkylene diols implemented having dicarboxylic acids and derivatives thereof, wherein at least 10 to 40 wt % must be comprised of aliphatic C8 to C20 dicarboxylic acids, and auxiliary and additive materials in at least one component A or B.

Abstract: A frictional pad in combination with an upward facing support surface upon which the frictional pad is adhered and upon which a handheld electronic device is selectively disposed and held in a non-adhesive, non-slip, tacky fashion by the frictional pad. The frictional pad has a repositionable adhesive film releasably and repositionably adhered to the upward facing support surface. A squat dome is affixed to the upward facing support surface by the repositionable adhesive film. The squat dome has a continuous outward facing surface facing and contacting the handheld electronic device. A majority of the outward facing surface is continuous, smooth and parallel with the repositionable adhesive film.

Abstract: An aqueous sealant system, a wood product sealed by the aqueous sealant system, and a method for sealing a wood-based substrate. The aqueous sealant system includes: a) a film-forming resin composition including an aqueous latex of an active hydrogen-containing polymer, a filler, and optional additional additives; and b) a multi-isocyanate hardener, wherein the ratio by weight of the component a) to the component b) is 100:3 to 100:10.