Patent ID: 11926757
Assignee: JIANGSU CANLON BUILDING MATERIALS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A quick-drying solvent-free sag-resistant polyurethane waterproof coating, wherein its raw materials comprises a polyurethane prepolymer, a plasticizer, a dispersing agent, a filler, a dehydrating agent, a catalyst and a defoaming agent, the raw materials further comprise an oxazolidine reactive diluent that accounts for 1-10% by mass of the raw materials, the catalyst is composed of pentamethyl dipropylidene triamine, tetramethylethylenediamine, and 1,8-diazacyclo[5,4,0]undecene, and a feed mass ratio of pentamethyl dipropylidene triamine, tetramethylethylenediamine, and 1,1,8-diazabicyclo[5,4,0]undecane is (0.5-5):(0.5-3): 1; wherein, raw materials of the polyurethane prepolymer comprise a polyether diol, a polyether triol, an isocyanate, and a chain extender, and the prepolymer is prepared by the following method:
(1) taking the raw materials of the polyurethane prepolymer, and reacting the polyether diol with the isocyanate until reaction completion;
(2) adding the polyether triol to reacted materials in Step (1), and reacting until reaction completion; and
(3) adding the chain extender to reacted materials in Step (2) and reacting, to prepare the polyurethane prepolymer.