An aqueous polyurethane resin having a cationic group in a side chain thereof is obtainable by reacting a polyester polyol, a polyisocyanate, and a diol containing a quaternary N-atom or amino group, the quaternary N-atom or amino group being not present in the carbon chain between the two hydroxyl groups of the diol. The polyester polyol is obtained by reacting an aromatic polycarboxylic acid and a polyol. The polyurethane resin is suitable as a resin in treatment liquids for inkjet printing.

An aqueous polyurethane resin dispersion, the polyurethane resin is obtainable by reacting an allophanate based isocyanate according to general formula I or II, optionally a polyether diol, a polyol containing a quaternary N-atom or tertiary amino group and a polyol selected from the group consisting of polyester polyol, polyether polyol, polycarbonate polyol, a polyacrylate polyol, a polyolefin and a polyamide polyol. The polyurethane resin is suitable as a resin in treatment liquids of substrates and images made by inkjet printing.

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A closed loop recycling process of manufacturing a foam part includes dispersing a filler material recycled from an additive manufacturing (AM) process in at least one foam reactant and pouring or injecting the at least one foam reactant with the filler material into a mold and forming the foam part. The foam part has a foam matrix with between 2.5 wt. % and 30 wt. % of the filler material. The filler material can be a recycled powder from a selective laser sintering process that is not graded (i.e., sized) before being dispersed in the at least one foam reactant. For example, the recycled powder can be a recycled polyamide 12 (rPA12) powder with an average particle diameter of less than 100 micrometers. Also, the least one foam reactant can be a polyol reactant and an isocyanate reactant such that a polyurethane foam matrix with recycled rPA12 filler material is formed.

A closed loop recycling process of manufacturing a foam part includes dispersing a filler material recycled from an additive manufacturing (AM) process in at least one foam reactant and pouring or injecting the at least one foam reactant with the filler material into a mold and forming the foam part. The foam part has a foam matrix with between 2.5 wt. % and 30 wt. % of the filler material. The filler material can be a recycled powder from a selective laser sintering process that is not graded (i.e., sized) before being dispersed in the at least one foam reactant. For example, the recycled powder can be a recycled polyamide 12 (rPA12) powder with an average particle diameter of less than 100 micrometers. Also, the least one foam reactant can be a polyol reactant and an isocyanate reactant such that a polyurethane foam matrix with recycled rPA12 filler material is formed.

An aqueous polyurethane resin dispersion, the polyurethane resin having a cationic group and a polyalkylene oxide in a side chain thereof and is obtainable by reacting a polyisocyanate with a polyether diol and with a polymeric diol such as a polyester diol, polyether diol, polycarbonate diol, polyacrylate diol or polyolefin diol and with a cationic polyol selected from the group consisting of an quaternary ammonium, a quaternary phosphonium, a tertiary sulfonium and a iodonium wherein the cationic polyol comprises at least two hydroxyl groups and has a total number of carbon atoms making up the carbon chains between the cationic charged atom and a hetero atom or end of the carbon chain of the cation over charge ratio of at least 12. The aqueous dispersion can be used in treatment liquids for inkjet printing and in inkjet inks.

A polyether composition for a polyurethane foam is provided, comprising a polyether polyol and a polyether carbonate polyol that has a primary hydroxyl group molar content of not less than 40 mol %. A method for preparing a polyurethane foam is further provided, comprising the following steps: preparing a mixture by preheating and melting the polyether composition for a polyurethane foam, a foaming agent, a chain extender, a catalyst, a pore-forming agent and a foam stabilizer, and mixing well; cooling the mixture; and performing a polymerization reaction by adding an isocyanate to the cooled mixture and mixing, thus obtaining a polyurethane foam product. The use of the polyether carbonate polyol with the primary hydroxyl group molar content of not less than 40 mol % overcomes the defects of unstable performance of polyurethane and poor mechanical properties of products when the VOC content of the polyurethane foam is reduced by adding additives in the prior art.

A self-crosslinkable polyurethane or polyurethane-urea aqueous dispersion, a preparation method therefor, and a use thereof. Side chains of the polyurethane or polyurethane-urea contain non-sterically-hindered siloxy groups. During the drying and activation of the aqueous dispersion, the siloxys in the side chains are hydrolyzed and crosslinked with each other to increase the cross-linking density, significantly improving the heat resistance, the humidity resistance, and other properties of an adhesive obtained therefrom. The aqueous dispersion itself has a good stability. In addition, an application system based thereon has an excellent stability and a long storage time. The aqueous dispersion is suitable for the preparation of high quality paints and sealants, especially adhesives.

A polyurethane catalyst comprises a sodium compound, the sodium compound being 1 to 60 wt % of the polyurethane catalyst by the mass percent, and further comprises a tertiary amine and/or pyridine compound. The sodium compound and the tertiary amine and/or pyridine compound achieve a synergistic effect; during the catalysis of the polymerization of isocyanate and polyalcohol, the speed of the polymerization reaction is increased; and the prepared polyurethane material has excellent physical properties, does not contain any heavy metal element at all, is an environment-friendly catalyst, solves the technical problem of ensuring environmental protection, safety and the catalytic efficiency of the polyurethane catalyst, and is particularly applicable to the preparation of polyurethane synthetic leather resin slurry, a polyurethane elastomer (prepolymer), a polyurethane coating, a polyurethane adhesive, a polyurethane composite material, flexible polyurethane foam, and a rigid polyurethane material.

An aqueous polyurethane resin having a cationic group in a side chain thereof is obtainable by reacting a polyester polyol, a polyisocyanate, and a diol containing a quaternary N-atom or amino group, the quaternary N-atom or amino group being not present in the carbon chain between the two hydroxyl groups of the diol. The polyester polyol is obtained by reacting an aromatic polycarboxylic acid and a polyol. The polyurethane resin is suitable as a resin in treatment liquids for inkjet printing.

A liquid set for inkjet recording, includes (i) an aqueous treatment liquid including a polyurethane resin obtainable by reacting a polyester polyol, a diol containing a quaternary N-atom or tertiary amino group, and a polyisocyanate, wherein the quaternary N-atom or tertiary amino group is present in a side chain of the carbon chain linking the two hydroxyl groups of the diol, and the polyester polyol is obtained by reacting a polyol and an aromatic polycarboxylic acid; and (ii) an aqueous inkjet ink including a colorant. A method for inkjet printing includes using the liquid set.