Polyurethane elastic fiber with flame retardant function and preparation method thereof
AssigneeYantai Tayho Advanced Materials Co., Ltd.
InventorsYongjun CHEN, Qianli MA
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Abstract
Disclosed are a polyurethane elastic fiber with a flame retardant function and a preparation method thereof. The polyurethane elastic fiber is prepared by using a polyether diol containing phosphorus elements or a polyester diol containing phosphorus elements as a raw material to react with 4,4′-diphenylmethane diisocyanate to prepare a prepolymer, extending the chain using an organic amine to obtain a polyurethane solution, and dry spinning with the polymer solution to prepare the polyurethane fiber. The limit oxygen index of the prepared polyurethane fiber was between 25% and 32%.
Claims10
A preparation method of a polyurethane elastic fiber with a flame retardant function, comprising:
- step 1 of reacting a diol containing flame-retardant elements with excess 4,4′-diphenylmethane diisocyanate to prepare a prepolymer end-capped by isocyanate, and dissolving the prepolymer in an organic solvent to form a prepolymer solution;
- step 2 of adding a diamine or a mixed amine of a diamine and a monoamine to the prepolymer solution for chain extension reaction to obtain a polyurethane solution;
- and
- step 3 of mixing the polyurethane solution with an anti-yellowing agent and an antioxidant, followed by curing, filtering, defoaming, and then dry spinning to obtain the polyurethane elastic fiber with flame retardant function.
Dependencies are inferred from the claim text.