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公开(公告)号：EP4296296A1
公开(公告)日：2023-12-27
申请号：EP22188535.3
申请日：2022-08-03
摘要： A method of manufacturing a particulate composition comprises:
III) Providing an aqueous dispersion, the dispersion comprising polymer particles, wherein the polymer of the particles has a glass transition temperature as determined by differential scanning calorimetry according to ISO 11357, second heating, at a heating and cooling rate of 20 K/ min; and
II) Storing the dispersion of step I) at a temperature of ≤ 0 °C until a polymer-comprising precipitate is formed.
The method further comprises:
III) Grinding the precipitate of step II) at a temperature above the glass transition temperature of the polymer to obtain a particulate composition, wherein the precipitate in step II) has a water content of at least 5 wt.-%.-
公开(公告)号：EP4012002A1
公开(公告)日：2022-06-15
申请号：EP20212819.5
申请日：2020-12-09
IPC分类号： C09J175/02 , C09J175/04 , C09J175/06
摘要： An adhesive composition comprises a polyurethane polymer, a solvent and a co-solvent, wherein the polyurethane polymer is an internally and/or externally hydrophilized thermoplastic polyurethane having a mass average molecular weight Mw, as determined by gel permeation chromatography against polystyrene standards using N,N-dimethyl acetamide as the eluent, of ≥ 50000 g/mol, the solvent is a polar-aprotic solvent such as MEK and the co-solvent is water.
The polyurethane polymer, the solvent and the co-solvent are present in such amounts that they form a dispersion.
The polyurethane polymer content is ≥ 10 weight-%, based on the total weight of the composition.
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