摘要:
The invention relates to new, hydrolysis-stable, aqueous polyurethane-polyurea dispersions based on polycarbonate-polyols, to a process for preparing them and to their use in coating materials.
摘要:
The invention relates to a method for coating sheet-form textile materials, in which there is applied to a sheet-form textile material an aqueous dispersion containing anionically modified polyurethane ureas comprising (A) aromatic diisocyanate, (B) polyether polyol having a mean molecular weight greater than 1500, (C) at least one compound containing from 1 to 2 isocyanate-reactive groups and at least one ionogenic group, (D) polyamine having a mean molecular weight of at least 32, and (E) water, wherein the mean total functionality of the isocyanate-reactive compounds B to D is from 1.85 to 2.2, the molar ratio of the isocyanate groups of component A to the isocyanate-reactive groups of components B to D is greater than 1, and the polyurethane ureas have a content of from 800 to 1500 mmol of urethane groups/kg of anionically modified polyurethane urea and a content of from 800 to 1800 mmol of urethane plus urea groups/kg of anionically modified polyurethane urea.
摘要:
The invention relates to a method for coating sheet-form textile materials, in which there is applied to a sheet-form textile material an aqueous dispersion containing anionically modified polyurethane ureas comprising (A) aromatic diisocyanate, (B) polyether polyol having a mean molecular weight greater than 1500, (C) at least one compound containing from 1 to 2 isocyanate-reactive groups and at least one ionogenic group, (D) polyamine having a mean molecular weight of at least 32, and (E) water, wherein the mean total functionality of the isocyanate-reactive compounds B to D is from 1.85 to 2.2, the molar ratio of the isocyanate groups of component A to the isocyanate-reactive groups of components B to D is greater than 1, and the polyurethane ureas have a content of from 800 to 1500 mmol of urethane groups/kg of anionically modified polyurethane urea and a content of from 800 to 1800 mmol of urethane plus urea groups/kg of anionically modified polyurethane urea.
摘要:
The invention relates to novel microporous coatings based on polyurethane polyurea, and to a process for the production of microporous coatings, in which a composition comprising an aqueous, anionically hydrophilised polyurethane dispersion (I) and a cationic coagulant (II) containing a cationically hydrophilised polyurethane polyurea dispersion is foamed and dried.
摘要:
The invention relates to novel microporous coatings and to a process for the production of microporous coatings. A composition comprising an aqueous, anionically hydrophilised polyurethane dispersion (I) and a cationic coagulant (II) is foamed and dried to provide the microporous coating.
摘要:
Aqueous coating materials are provided. The materials comprise I) hydroxyl-free polyurethanes and/or polyurethane-ureas, II) ionically modified, hydroxyl-containing polyurethanes and/or polyurethane-ureas, and III) at least one crosslinker, characterized in that the components (I) and (II) comprise polycarbonate polyols which have at least 25% by weight of 1,4-butanediol as synthesis component. A process for preparing the coating materials, and their use as soft feel paint, is also provided.
摘要:
The present invention relates to a new aqueous binder system for nail varnishes, based on nitrocellulose-containing polyurethanepolyurea dispersions.
摘要:
The invention relates to a process for producing polyurethane foams for wound management wherein a composition containing a polyurethane dispersion and inorganic, cationic coagulants is frothed and dried.
摘要:
Aqueous coating compositions based on polyurethane dispersions which cure under the influence of high-energy radiation, to a process for preparing them and to their use. The coating compositions contain a polyisocyanate, a polyurethane containing free-radically polymerizable groups, and an initiator which is capable of initiating a free-radical polymerization.
摘要:
Coating compositions that are stable to thermal yellowing that include coating materials containing I) one or more dispersions of hydroxyl-free polyurethanes and/or polyurethane-ureas, II) one or more aqueous solutions or dispersions of ionically modified, hydroxyl-containing polyurethanes and/or polyurethane-ureas, other than the constituents of component I), and III) at least one crosslinker. The dispersions are obtained by A) preparing an NCO-containing polyurethane prepolymer by reacting polyisocyanates with polymeric polyols and/or polyamines having number-average molecular weights of 400 to 8000 g/mol, isocyanate-reactive, ionically or potentially ionically hydrophilicizing compounds and/or isocyanate-reactive nonionically hydrophilicizing compounds; B) either dissolving the prepolymer obtained from step A) in aliphatic ketones or, diluting the prepolymer solution if the preparation has already been carried out in the presence of A6) by further addition of aliphatic ketones, and C) reacting the remaining free NCO groups of the prepolymer with a chain extender component.