摘要:
A method for obtaining self-cleaning and self-sanitizing surfaces of finished leather, comprising the steps of deposition of two coating layers containing respective active mixtures on the finished leather surface, in which a first active mixture comprises a film-forming compound based on polymers and filler, a flow additive compound, a cross-linking compound, an anti-oxidant compound and an aqueous dispersion, and a second active mixture comprises a water-based auxiliary flow additive compound, a silicone emulsion, a solvent aliphatic prepolymer, a photo-catalyst compound, a water repellent agent, a biocide action powder agent and solvent agents and/or wetting agents and/or dispersing agents and/or anti-foam agents.
摘要:
The invention relates to a method for coating textiles and/or leather, comprising applying at least one polyurethane urea dissolved in a solvent or solvent mixture, wherein the solvent consists of one or more monohydroxy-functional alcohols, or a solvent mixture consisting of organic solvents, containing >80 wt. % of at least one monohydroxy-functional alcohol in relation to the total mass of the solvent mixture is used, and wherein the polyurethane urea is formed by: a) at least one araliphatic, aliphatic and/or cycloaliphatic diisocyanate; b) at least one polyether polyol having a number average molecular weight Mn≧400 and ≦6000 g/mol and an average hydroxyl functionality of ≧1.5 and ≦4; c) at least one amino-functional compound having at least two isocyanate reactive amino groups; and optionally other components. The invention also relates to a textile or leather coating produced using this method and a dissolved polyurethane urea, and to the use of the polyurethane urea for coating substrates and for producing free films.
摘要:
The present invention discloses a process for preparing a flame-retardant, lightfast, low fogging and degradable car seat leather wherein ammonia salt deliming is replaced with an ammonia free one, tetrakis hydroxymethyl phosphonium sulfate and the flame-retardant starchy leather surfactant are used as the tanning agents to replace the conventional chrome tanning agent, hot water washing is used to reduce the fogging value of the seat leather, the flame-retardant performance is enhanced by combination of retanning, greasing and coating, the lightfast material is applied to enhance the lightfastness of the coating and the spray coating is replace with the roller coating to lower the consumption of the paints.
摘要:
A process for producing aqueous polyurethane preparations comprises the steps of: A) providing a solution in at least one solvent of at least one polymeric polyurethane bearing ionizable groups, B) using at least one neutralizing agent to partially neutralize the at least one polymeric polyurethane bearing ionizable groups, C) dispersing the at least one polymeric polyurethane bearing ionizable groups in water, D) optionally removing the at least one solvent, E) optionally diluting the mixture after solvent removal with further water, F) admixing neutralizing agent after solvent removal.
摘要:
A leather coating composition comprising (I) an aqueous urethane resin, (II) a matting agent, and (III) a silicone-acrylic graft copolymer resin emulsion obtained by reacting a polyorganosiloxane with a (meth)acrylate monomer has improved abrasion resistance and anti-staining properties. Leather coated with the composition is given an aesthetic appearance and abrasion resistance.
摘要:
In a manufacturing method (HV) for producing finished leather (FL) for covering components with leather, wherein the following process steps for treating a leather hide (LH) are performed on a raw hide (RH) as an initial product for producing the finished leather (FL) as an end product of the method: mechanical process steps in which the leather hide (LH) is treated using mechanical tools, and chemical process steps in which the leather hide is treated with chemicals, wherein both mechanical and chemical modes of action are combined in individual process steps, it is envisaged that, in a process step of retanning, synthetic and/or vegetable tanning materials, fattening agents, microencapsulated auxiliary agents based on ammonium, phosphate, phosphorus and the ester compounds thereof and natural additives based on rubber and milk products are used, and in a process step of reducing the thickness of the leather hide, the leather thickness of the leather hide (LH) is reduced by splitting and/or scraping without reducing the physical authenticity, and in a process step of flame retardant application, an application material (AM) consisting of acrylic, polyurethane, vinyl acetate dispersions and having a flame retardant based on cyclic di- and triphosphates and organic ammonium with sulphur and phosphorus compounds is applied on the flesh side (FS) of the leather hide (LH).
摘要:
A process for producing aqueous polyurethane preparations comprises the steps of: A) providing a solution in at least one solvent of at least one polymeric polyurethane bearing ionizable groups, B) using at least one neutralizing agent to partially neutralize the at least one polymeric polyurethane bearing ionizable groups, C) dispersing the at least one polymeric polyurethane bearing ionizable groups in water, D) optionally removing the at least one solvent, E) optionally diluting the mixture after solvent removal with further water, F) admixing neutralizing agent after solvent removal.
摘要:
The invention relates to a method for producing aqueous polyurethane-polyurea dispersions, where A) first a polyurethane prepolymer containing NCO groups is produced by reacting A1) polyisocyanates with A2) polymeric polyols and/or polyamines having number-average molecular weights of more than 400 to 8,000 g/mol, A3) possibly low-molecular-weight compounds having number-average molecular weights of 17-400 g/mol selected from the group comprising mono- and polyalcohols, mono- and polyamines, and amino alcohols, A4) isocyanate-reactive, ionically or potentially ionically hydrophilic compounds and/or isocyanate-reactive non-ionically hydrophilic compounds, A5) isocyanate-reactive compounds, which contain at least one C7 to C24 alkyl group or C7 to C24 alkenyl group, and A6) isocyanate-reactive compounds, which contain at least one polysiloxane group, and B); the NCO groups of the prepolymer that are not yet free are reacted with isocyanate-reactive monoamines, polyamines, hydrazine, and/or hydrazides, dimensioned in such a way that a calculated ratio of the isocyanate-reactive NH groups to the NCO groups of 0.7 to 1.2 is achieved.
摘要:
A coated leather substrate having at least one surface that comprises at least one first layer above that surface and at least one second layer above that first layer and, the first layer comprises at least one polymer and wherein the second layer being different in its chemical composition from the first layer comprises the reaction product of a cross-linking reaction of at least one first composition said first composition comprising one or more compounds having at least one fluoropolyether segment and at least two cross-linkable groups and said second composition comprising at least one fluorinated polyolefin. Furthermore are provided a coating composition, methods of coating leather substrates and use of the coating compositions.