Polyurethane elastomer preparation method using starch liquefaction products

Abstract

The invention discloses a polyurethane elastomer preparation method using starch liquefaction products. The polyurethane elastomer preparation method comprises the following steps: (1) putting a liquefying agent comprising polyethylene glycol 400 and glycerin into a container with the mass ratio of the polyethylene glycol 400 to the glycerin of 2:1, stirring and elevating the temperature to 150 DEG C; (2) adding an acid attapulgite catalyst into the container, adding starch into the container with the mass ratio of the starch to the liquefying agent of 6:1, stopping the reaction when the hydroxyl value range of the starch liquefaction products is 90 mgKOH / g to 170 mgKOH / g; (3) weighing a rubber vulcanizator, putting the rubber vulcanizator into the container, and adding acetone until complete dissolution; and (4) adding polyether and the starch liquefaction products into a acetone solution of the rubber vulcanizator, adding auxiliary agents and attapulgite, stirring evenly, then adding toluene diisocyanate (TDI), finally adding 1-2 drops of catalyst dibutyltindilaurate, stirring to foaming, and then obtaining polyurethane elastomer. The polyurethane elastomer preparation method is simple, and is suitable for industrial production, and the polyurethane elastomer has the advantages of high strength, good stability and strong water resistance.

Description

technical field [0001] The invention relates to a method for preparing a polyurethane elastomer, in particular to a method for preparing a polyurethane elastomer from a starch liquefaction product. Background technique [0002] Polyurethane elastomer is a polymer material with excellent performance widely used at present. An important chemical raw material for the synthesis of polyurethane elastomer is polyether polyol. Industrial preparation of polyether polyol is based on petroleum products. At present, the world Petroleum resources are becoming increasingly scarce, prices are skyrocketing, and the cost of synthesizing polyether polyols is increasing. [0003] There are many varieties of crops in our country, and the output is relatively high. Replacing polyether polyols with starch liquefied products can reduce the dependence on petroleum products and reduce costs. The biodegradability of polyurethane materials has very important practical significance for the developm...

AI Technical Summary

Problems solved by technology

[0002] Polyurethane elastomer is a polymer material with excellent performance widely used at present. An important chemical raw material for synthesizing polyurethane elastomer is polyether polyol, which is industrially prepared Polyether polyols are made of petroleum products. At present, the world's petroleum resources are becoming increasingly scarce, and the price is skyrocketing. The cost of synthesizing polyether polyols is increasing.

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