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Color-lightening agent for preparing pale rosin and application thereof

A technology of light coloring agent and rosin, which is applied in the field of light coloring agent for preparing light-colored rosin, can solve the problems of high chroma, residual toxic light coloring agent, and high production cost, and achieve low chroma, significant effect and low production cost. low effect

Inactive Publication Date: 2013-09-25
YULIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the above-mentioned technical scheme, and provide a kind of light coloring agent for preparing light-colored rosin and application thereof, the production process of the light-coloring agent is simple, the cost is low, and it can be used in the preparation process of light-colored rosin. Avoid the disadvantages of high temperature decarboxylation, oxidation, high chroma, residual toxic light coloring agent, high production cost, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of PbO / zeolite light color agent

[0026] Put 1g of zeolite in 0.05mol / L of Pb(NO 3 ) 2 Stir and soak in the solution for 48 hours to obtain colloidal zeolite; then filter and dry the colloidal zeolite in an oven at 100°C for 16 hours, then put it in a horse-boiling furnace, roast at 550°C for 3 hours, cool down, and pulverize to obtain shallow Colorant PbO / zeolite.

[0027] 2. Preparation of light-colored rosin

[0028] Put 80g of first-grade rosin (Garner color 7, softening point 88°C) and 0.08g of PbO / zeolite light color agent into a 250mL four-neck flask with thermometer, mechanical stirrer, nitrogen vent tube and condenser tube, and vacuum for 30min , feed nitrogen as a protective gas, heat until the rosin is completely melted, start the electric stirrer to stir, and when the temperature of the system rises to 270°C, start the heat preservation reaction for 3 hours; for 30 min; turn off the vacuum pump after pumping; blow nitrogen to cool down t...

Embodiment 2

[0033] 1. Preparation of PbO / zeolite light color agent

[0034] Put 1g of zeolite in 0.05mol / L of Pb(NO 3 ) 2 Soak in the solution for 60 hours to obtain colloidal zeolite; then dry it in an oven at 100°C for 24 hours, put it in a horse boiling furnace, and roast it at 500°C for 2.5 hours, after cooling, crush it to obtain PbO / zeolite as a light color agent .

[0035] 2. Preparation of light-colored rosin

[0036] Put 120g of first-grade rosin (Garner color 7, softening point 88°C) and 0.12g of PbO / zeolite light color agent into a 250mL four-neck flask with thermometer, mechanical stirrer, nitrogen vent tube and condenser tube, and vacuum for 40min , feed nitrogen as a protective gas, heat until the rosin is completely melted, start the electric stirrer to stir, and when the temperature of the system rises to 270°C, start the heat preservation reaction for 3 hours; After pumping for 20 minutes, turn off the vacuum pump; blow nitrogen to cool down to 220 ° C and discharge ...

Embodiment 3

[0041] 1. Preparation of PbO / zeolite as light color agent

[0042] Put 1g of zeolite in 0.05mol / L of Pb(NO 3 ) 2 Soak in the solution for 36 hours to obtain colloidal zeolite; then dry it in an oven at 120°C for 12 hours, put it in a horse boiling furnace for 3 hours at 500°C, and after cooling, crush it to obtain PbO / zeolite as a light color agent.

[0043] 2. Preparation of light-colored rosin

[0044]Put 80g of first-grade rosin (Garner color 7, softening point 88°C) and 0.24g of PbO / zeolite light color agent into a 250mL four-necked flask with a thermometer, a mechanical stirrer, a nitrogen vent tube and a condenser tube, and vacuum for 20min , feed nitrogen as a protective gas, heat until the rosin is completely melted, start the electric stirrer to stir, and when the temperature of the system rises to 250°C, start the heat preservation reaction for 2 hours; after the heat preservation reaction is completed, turn on the vacuum pump to extract the low boiling material ...

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Abstract

The invention discloses a color-lightening agent for preparing pale rosin and application thereof. The preparation method of the color-lightening agent comprises the steps of placing zeolite in a Pb(NO3)2 solution and soaking, drying, roasting, cooling and grinding to obtain the color-lightening agent PbO / zeolite. The preparation method of pale rosin comprises the steps of carrying out a reaction on the prepared color-lightening agent and rosin for 2-4 hours under the presentation of inert gas at 250-270 DEG C, extracting substance with low boiling point under reduced pressure, cooling and discharging to obtain the pale rosin. According to the invention, the preparation process of the color-lightening agent is simple, and by applying the color-lightening agent in the preparation process of the pale rosin, the prepared pale rosin has the color less than 2-4 color gradations than raw material rosin. In addition, the operation is simple, the cost is low, therefore, the color-lightening agent is especially suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of rosin processing, and in particular relates to a light-coloring agent for preparing light-colored rosin and its application. Background technique [0002] Rosin is a renewable natural resin, known as "the oil that grows on trees", and is one of the important forest chemical products. Rosin is widely used in coatings, adhesives, inks, papermaking, soap, metal processing, synthetic rubber, building materials, food, polymers, fine chemicals and other industries. [0003] Rosin is a complex mixture of isomers of various resin acids and neutral high-boiling terpene compounds, the main component of which is resin acid (C 19 h 29 C00H), the content is 80%~90%, they are a kind of monocarboxylic acid containing two double bonds with a tricyclic phenanthrene skeleton. The conjugated double bonds in rosin have been oxidized, the higher the degree of oxidation, the darker the color, the lower the grade, the more l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09F1/02
Inventor 曾玉凤李承科秦祖赠
Owner YULIN NORMAL UNIVERSITY