RU1836390C - Method for obtaining furfuryl alcohol cooligomers - Google Patents

Abstract

SUMMARY OF THE INVENTION: 2 mol of a polyhydric aliphatic alcohol with a functionality of 2-5 with C2-20 is synthesized with 1 mol of a dicarboxylic acid or anhydride of the formula HOOC-R-COOH or g-CO-OCO, where R is C2-8. R-CO-0-CO, for 4.5-5.5 hours, followed by the introduction of 2-8 mol of furfuryl alcohol in the presence of maleic anhydride when heated. The dicarboxylic acid or its anhydride is subjected to stirring and heating to 190 ° C, kept for 4.5-5.5 hours, the mixture is cooled to 70 ° C and furfuryl alcohol and 0.22% by weight of monomers are added - maleic anhydride and heated to 130 ° C, maintaining until the formation of co-oligomers with the desired viscosity. 1 tab.

Description

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The invention relates to the synthesis of reactive furan oligomers that can be used in the manufacture of coatings, bookmarks, press compositions.

The aim of the invention is to expand the raw material resources of furan co-oligomers, as well as to increase the rate of polymerization, to reduce the cure time of furan oligomers.

This goal is achieved in that the furiguryl alcohol co-oligomers are synthesized by the reaction of 1 mol of dicarboxylic acids or anhydrides of the formulas HOOC-R-COOH or R-CO-0-CO,

where R is C2-8, R-CO-0-CO

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with 2 mol of polyhydric aliphatic alcohols with a functionality of 2-5 and consisting of C2-20 for 4.5-5.5 hours and then (2-8) mol of furfuryl alcohol and maleic anhydride are introduced into the reaction as a catalyst. The synthesized co-oligomers have a higher polymerization rate and a reduced cure time.

The general procedure for preparing furfuryl alcohol co-oligomers is as follows.

1 mol of dicarboxylic acid or its anhydride and 2 mol of aliphatic polyhydric alcohol were charged into a reaction vessel equipped with a mechanical stirrer, a thermometer, a Dean-Stark trap, and a capillary to purge an inert gas

from about

with

that one. With stirring, the temperature was raised to 195 ° C. Withstood 4.5-5.5 hours

Then the reaction mixture was cooled to 70 ° C and, without stopping stirring, 2-8 mol of furfur alcohol was added, 0.22% by weight of maleic anhydride monomers was added, and the temperature was raised to 130 ° C. It was held until the formation of co-oligomers with the desired viscosity and cooled.

The specific name of the starting compounds and the properties of the co-oligomers are given in the table.

The table data shows: Examples 1-3 are given to justify the limits of variation in the amount of furfuryl alcohol

Examples 4-9 show the applicability of the method to the claimed scope.

Example 10 properties of the furan oligomer of the prototype

Example 4 shows that by the claimed method it is possible to obtain furan co-oligomers from succinic anhydride, while according to US Pat. U.S. No. 3,544,530 (column 4, lines 3-16 of the description) in this case, furfuryl alcohol homopolycondensate is formed).

Konk examples

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The claimed method allows the synthesis of furan co-oligomers, which in terms of polymerization rate at 300 ° C and curing time at 240 ° C are superior to furan oligomers of the prototype.

The technical and economic efficiency of the claimed method from the existing one consists in expanding the raw materials of furan co-oligomers, as well as in increasing the polymerization rate and reducing the curing time of furan oligomers.

Claims (1)

The claims A method for producing furiguryl alcohol co-oligomers by the interaction of furfuryl alcohol with a hydroxyl-containing component in the presence of maleic anhydride by heating, characterized in that, as the hydroxyl-containing component, the condensation product of a polyhydric aliphatic alcohol C2-C20 with 2-5 Dicarboxylic acid is used and dicarboxylic acid -R-COOH or anhydride of the formula 25 R-CO-0-CO, where R C2-a at a molar ratio of polyhydric aliphatic alcohol, dicarboxylic acid or anhydride and furfuryl alcohol 2: 1: 2-8, respectively.