| 摘要 |
FIELD: chemistry.SUBSTANCE: present invention relates to an aqueous polyurethane-polyurethane-urea dispersion which is used as a starting adhesive material in dispersion adhesives, as well as a method of producing such a dispersion, use thereof, adhesive compositions containing said dispersion and adhesive composite materials. The aqueous polyurethane-polyurethane-urea dispersion is composed of: A) one or more di- or higher functional polyols, having average molecular weight of 400-5000 Da, B) optionally one or more di- or higher functional polyol components, having molecular weight of 62-399 Da, C) one or more di- or higher polyisocyanate components, and D) a mixture (D) of primary and/or secondary monoamine compounds D1) and primary and/or secondary diamine compounds D2), wherein at least one of the components (D1) and/or (D2) contains sulphonate groups, wherein the average amine functionality of the mixture (D) is 1.65-1.95, and the equivalent ratio of NCO groups in the NCO prepolymer and total number of amine and hydroxyl groups of the mixture (D) which react with the isocyanate is equal to 1.04-1.9.EFFECT: obtaining stable aqueous dispersions of adhesives without the need to use an emulsifying agent, films from which have improved initial thermal stability and high final thermal stability.14 cl, 10 ex, 1 tbl |
