Flame-retardant waterborne polyurethane and preparation method thereof
The invention belongs to the technical field of polyurethane, and particularly relates to flame-retardant waterborne polyurethane and a preparation method thereof. The flame-retardant polyurethane resin is prepared from the following raw materials: trans-block polyether polyol, a solvent, isocyanate...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention belongs to the technical field of polyurethane, and particularly relates to flame-retardant waterborne polyurethane and a preparation method thereof. The flame-retardant polyurethane resin is prepared from the following raw materials: trans-block polyether polyol, a solvent, isocyanate, a chain extender, a catalyst, a flame retardant, a neutralizer, a curing agent and deionized water. The trans-block polyether polyol takes a mixture of a bisphenol A oligomer and a fatty alcohol oligomer as an initiator. According to the prepared flame-retardant waterborne polyurethane, a phosphorus-containing group is introduced into a main chain of a soft segment of a molecular chain of the waterborne polyurethane by adding a reactive flame retardant, so that a lasting flame-retardant effect is achieved, the oxygen index of the waterborne polyurethane is increased, the stability is good, the durability is high, the toxicity is low, and the influence on the mechanical property of the waterborne polyurethane is r |
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