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[Chemical Knowledge]：Production process and preparation method of high resilience polyether

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High resilience polyether is a new polymer material with high resilience and wear resistance, which is widely used in automobile seats, sports equipment and other fields. This article will introduce the production process and preparation method of high rebound polyether.

1. the selection of polyether material

polyether material is an indispensable raw material for the preparation of high resilience polyether. Commonly used polyether materials are polyester ether, poly silicon ether, polyethylene glycol, etc. Preparation
of

2. polyether prepolymer
polyether prepolymer is a key step in the preparation of high resilience polyether. It is usually prepared by reacting a polyether polyol with a diisocyanate. Among them, the type and molecular weight of polyether polyol, the type and amount of diisocyanate will directly affect the performance of polyether prepolymer. The preparation
of

3. high resilience polyether The preparation of
high resilience polyether includes three stages: mixing, gelling and molding of prepolymer.
The mixture
of the
(I) and prepolymer
the polyether prepolymer is mixed with a solvent, a toughening agent, an auxiliary agent, etc., heated and stirred uniformly to form a homogeneous liquid state.

(II), gelation

, the prepolymer mixture is injected into the reaction kettle, and the catalyst is added. The reaction temperature is usually 80-120 ° C., and the reaction is completed after a period of time. The quality of the colloid is mainly controlled by the choice of catalyst and the reaction temperature.

(III), molding

colloid by extrusion, injection molding or spraying methods. The formed high resilience polyether material has good mechanical properties and resilience.

4. to optimize the performance of high resilience polyether material

to optimize the performance of high resilience polyether material can be through the following ways:

(I), change the formula of prepolymer, such as the type and proportion of polyether polyol.

(II), change the gelling conditions, such as the type of catalyst, dosage and reaction temperature.

(III), add toughening agent, additives, etc.

(IV), the molding process is optimized.

5. conclusion

high resilience polyether is a kind of polymer material with excellent performance, its preparation process and preparation method have certain technical requirements, need to follow the scientific and reasonable process parameters and formula design. Optimizing the performance of high resilience polyether material is the key to the preparation process, which needs to be verified by experiments and in-depth analysis to improve the quality and performance of the product.