Plant fiber based polyether polyol and preparation method thereof

Abstract

The invention relates to plant fiber base polyether glycol and a preparation method thereof, which belong to the field of polymer chemistry. The preparation method is as follows: mixed alcohol, an acid and a non-ionic surfactant are uniformly mixed to obtain a liquefied reagent; dried plant fiber raw materials are added into the liquefied reagent which is heated to the temperature of between 120 and 160 DEG C, and added in batch; after feeding is over each time, the temperature is raised to the temperature before the feeding, and maintained until the mixture reacts for 10 to 20 minutes; the temperature is maintained after the feeding is over, and the mixture reacts for 20 to 120 minutes; solid alkali is added into a reaction system until the pH value is neutral; and the product is obtained after discharging. The plant fiber base polyether glycol prepared by the method can be used for producing hard polyurethane foam with the function of heat insulation.

Description

technical field

[0001] The invention relates to a plant polyol and a preparation method thereof, in particular to a polyether polyol for preparing polyurethane based on plant fiber raw materials and a preparation method thereof, belonging to the field of polymer chemistry. Background technique

[0002] Polyurethane is a polymer with repeating structural units of urethane segments produced by the reaction of isocyanate and polyol. At present, polyurethane materials have been widely used in industrial fields such as transportation, metallurgy, construction, light industry (papermaking, shoemaking, leather), printing and printing and dyeing, and their consumption is also increasing.

[0003] Most of the polyols used in the preparation of polyurethanes are made from petrochemical products. Due to rising oil prices and depletion of resources, people have to seek polyether polyols based on natural products to partially or completely replace the current polyether polyols. [0004...