摘要:
The present invention relates to an aqueous polyurethane urea dispersion comprising a polyurethane urea polymer comprising structural units of the formula (I) wherein Aromat represents a compound selected from the group consisting of phenylene, tolylene, xylylene, tetramethylxylylene and diphenylenemethane, and wherein the polyurethane urea is obtained from components comprising A) at least one aromatic diisocyanate, B) at least one polyether polyol having a number-average molecular weight of from 300 to 1500 Da, C) at least one compound having one to two isocyanate-reactive groups and at least one ionogenic group, D) at least one polyol having a number-average molecular weight of from 60 to 499 Da, and E) water, wherein the average overall functionality of compounds B) to D) is from 1.85 to 2.2 and wherein the sum of the amount of aromatic urea groups and the amount of urethane groups is 2700 to 5000 mmol per kg polyurethane urea polymer.
摘要:
The invention relates to aqueous dispersion adhesives based on a mixture of aqueous polyurethane or polyurethane-urea dispersions, to a process for their preparation, and to the use of the dispersion adhesives in the production of adhesive composites.
摘要:
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, (C) one or more compounds which are monofunctional within the scope of the isocyanate polyaddition reaction and have an ethylene oxide content of at least 50 wt. % and a molecular weight of at least 400 daltons, and (D) one or more di- or poly-isocyanate components; and (ii) a mixture (E) of primary and/or secondary monoamino compounds (E1) and primary and/or secondary diamino compounds (E2); wherein at least one of the amino compounds of the mixture (E) has a functional group selected from sulfonates and carboxylates; wherein mixture (E) 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 (E) is 1.04 to 1.9; to processes for their preparation and to use thereof in the production of adhesive composites.
摘要:
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.
摘要:
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.
摘要:
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, (C) one or more compounds which are monofunctional within the scope of the isocyanate polyaddition reaction and have an ethylene oxide content of at least 50 wt. % and a molecular weight of at least 400 daltons, and (D) one or more di- or poly-isocyanate components; and (ii) a mixture (E) of primary and/or secondary monoamino compounds (E1) and primary and/or secondary diamino compounds (E2); wherein at least one of the amino compounds of the mixture (E) has a functional group selected from sulfonates and carboxylates; wherein mixture (E) 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 (E) is 1.04 to 1.9; to processes for their preparation and to use thereof in the production of adhesive composites.
摘要:
The present invention relates to novel waterborne adhesives which are polymerizable 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.
摘要:
A method for reinforcing a part of a building comprises the step of adhesively bonding a textile to the surface of the part of a building by means of an adhesive. The invention relates further to such a reinforced part of a building and to the use of a textile in combination with an adhesive for reinforcing a part of a building, wherein the textile is adhesively bonded to the surface of the part of a building by means of an adhesive.
摘要:
The present invention relates to aqueous compositions based on crystalline or semicrystalline polyurethane polymers, processes for the preparation thereof and adhesive systems comprising these aqueous compositions and the use thereof.
摘要:
A method for reinforcing a part of a building comprises the step of adhesively bonding a textile to the surface of the part of a building by means of an adhesive. The invention relates further to such a reinforced part of a building and to the use of a textile in combination with an adhesive for reinforcing a part of a building, wherein the textile is adhesively bonded to the surface of the part of a building by means of an adhesive.