Composite catalyst and its application in preparing light-colored rosin esters

A composite catalyst and catalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve high cost, complex production process, deep color of rosin ester, etc. problem, achieve the effect of preventing oxidation and eliminating conjugated double bonds

Active Publication Date: 2008-09-17
江西科茂林化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because rosin contains conjugated double bonds, it is easy to oxidize and cause the color of the resin to darken. This quality of rosin resin is unacceptable in the market. In order to solve this problem, people have conducted a lot of research
It is known that there are three methods for preparing light-colored rosin esters: one is to hydrogenate rosin or modified rosin, refine and purify, and then esterify to obtain light-colored rosin esters; the other is to refine, esterify, and remove disproportionated rosin Hydrogen obtains light-colored rosin ester; but the production process of these two methods is complicated and the cost is high
The third method is to first purify the rosin to obtain refined rosin with Ghana color no greater than 3, add esterification catalyst and phenolic sulfide to obtain light-colored rosin ester at last during esterification, this method is compared with the first and second The process of this method is simplified, but the rosin or modified rosin still needs to be purified, and the cost is high
The preparation of rosin ester with common rosin has the characteristics of low cost and simple process, but the prepared rosin ester has a darker color

Method used

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  • Composite catalyst and its application in preparing light-colored rosin esters
  • Composite catalyst and its application in preparing light-colored rosin esters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 300 grams of rosin, 0.4 grams of hypophosphorous acid (50% aqueous solution), 0.6 grams of calcium hypophosphite, and 0.15 grams of sodium bisulfite in a reaction vessel equipped with inert gas inlet pipe, return pipe, water separator, thermometer and stirring paddle , 0.51 grams of 2246-S, 0.4 grams of magnesium oxide, 45 grams of 1,6-hexanediol. Slowly raise the temperature to 270°C within 2 hours and react for 10 hours, vacuumize for 45 minutes, naturally cool down to 220°C, add 0.45 grams of tetrakis (β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid) pentaerythritol Ester and 0.3 g of tris(2,4-di-tert-butylphenyl) phosphite, stirred for 10 minutes to release, at room temperature to obtain viscous liquid, acid value: 28.3 (mgKOH / g), color: solid Garner color 1+ .

Embodiment 2

[0036] Add 300 gram rosin, 0.4 gram hypophosphorous acid (50% aqueous solution), 0.6 gram calcium hypophosphite, 0.15 gram thiophene Sodium sulfate, 0.51 grams of 2246-S, 0.4 grams of magnesium oxide, heat and stir, slowly and evenly drop 36 grams of glycerin at 220 ° C, heat up to 270 ° C for 10 hours, vacuum for 60 minutes, naturally cool down to 220 ° C, add 0.45 g tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) pentaerythritol ester and 0.3 g tris(2,4-di-tert-butylphenyl) phosphite, stirred for 10 minutes release. Acid value: 9.7 (mgKOH / g), softening point: 89°C, color: solid Ghana color 2.

Embodiment 3

[0038] Add 300 grams of rosin, 0.4 grams of hypophosphorous acid (50% aqueous solution), 0.6 grams of calcium hypophosphite, 0.15 grams of sodium bisulfite in the reaction vessel equipped with inert gas inlet pipe, return pipe, water separator, thermometer and stirring blade , 0.51 grams of 2246-S, 0.4 grams of magnesium oxide, and 37 grams of pentaerythritol. Slowly raise the temperature to 270°C within 2 hours and react for 10 hours, vacuumize for 60 minutes, naturally cool down to 220°C, add 0.45 grams of tetrakis (β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid) pentaerythritol Esters and 0.3 g of tris(2,4-di-tert-butylphenyl)phosphite were released after stirring for 10 minutes. Acid value: 17.6 (mgKOH / g); softening point: 103°C; color: solid Garner color 2-.

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Abstract

The invention provides a compound catalysis used for preparing pale rosin ester, reducing the production cost and simplifying production technique as well as an application thereof. The compound catalysis comprises components of the following mass ratios: 1 to 200 portions of hypophosphorous acid and/or hypophosphite, 1 to 100 portions of sulfur-containing metal salt and 2 to 100 portions of organic disproportionation catalyst. The compound catalysis of the invention can prepare the pale rosin ester using common resin as the raw material to produce the pale rosin ester with solid garner color no larger than 2.

Description

technical field [0001] The invention relates to a composite catalyst and its application in preparing light-colored rosin ester. Background technique [0002] Rosin ester is a resin obtained by reacting rosin or modified rosin with alcohol. It is widely used in hot-melt adhesives, pressure-sensitive adhesives, shoe adhesives, laminating adhesives, and sealants; rosin esters can also be used as modifiers for rubber and plastics. [0003] Because rosin contains conjugated double bonds, it is easy to oxidize and cause the color of the resin to darken. This quality of rosin resin is unacceptable in the market. In order to solve this problem, people have carried out a lot of research. It is known that there are three methods for preparing light-colored rosin esters: one is to hydrogenate rosin or modified rosin, refine and purify, and then esterify to obtain light-colored rosin esters; the other is to refine, esterify, and remove disproportionated rosin. Hydrogen obtains light-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J31/06B01J27/053B01J27/14C09F1/04
Inventor 范德明曾广建徐社阳陈就记
Owner 江西科茂林化科技有限公司
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