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Rosin epoxy resin and preparation method thereof

A technology of rosin-based epoxy resin and epoxy resin, applied in the chemical modification of natural resin, coating, organic chemistry, etc., can solve the problem of poor heat resistance, weather resistance and poor storage stability of polyester powder coatings , serious environmental pollution and other problems, to achieve the effect of suitable for industrial production, excellent weather resistance, healthy preparation process

Inactive Publication Date: 2012-01-25
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its defect is that the production process of TGIC will produce a large amount of waste water and waste residue, which seriously pollutes the environment. At the same time, TGIC has been considered as a mutant protozoa with great physiological toxicity, and its use has been strictly restricted.
PT910 is a mixture of trimellitic anhydride triglycidyl ester and dibasic carboxylic acid glyceride researched and developed by Swiss CIBA Company. Its storage stability is poor, and it is necessary to use a special resin with a high glass transition temperature when making powder. The polyester powder coating prepared by PT910 has poor heat resistance and weather resistance.
However, there are no relevant reports on bio-based epoxy resins suitable for curing polyester powder coatings.

Method used

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  • Rosin epoxy resin and preparation method thereof
  • Rosin epoxy resin and preparation method thereof
  • Rosin epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Heat 100 parts by weight of rosin to 150°C under nitrogen protection, then add 0.3 parts by weight of hydroquinone and 30 parts by weight of maleic anhydride, the temperature rises to 190°C, react for 4 hours, cool, add ice The acetic acid was recrystallized and vacuum-dried to obtain 78 parts by weight of maleopimaric anhydride (MPA) with a purity of 96%.

[0037] (2) Dissolve the above-mentioned 78 parts by weight of maleopimaric anhydride (MPA) in an appropriate amount of N,N-dimethylformamide (DMF), and add 46 parts by weight of p-aminobenzoic acid, and stir at 25°C for 3 hours Afterwards, the temperature was raised to 150° C. and stirred for 4 hours, cooled to room temperature, and a yellow-brown solid was formed. An appropriate amount of 150 parts by weight of distilled water was added and stirred, and a yellow precipitate was produced. Filtration, washing, vacuum drying for 3 hours, repeated recrystallization with DMF and water, the final product was a white ...

Embodiment 2

[0046] (1) 100 parts by weight of rosin was heated to 150°C under nitrogen protection, then 2.6 parts by weight of p-toluenesulfonic acid and 35 parts by weight of maleic anhydride were added, the temperature was raised to 220°C, reacted for 3 hours, and cooled, Add glacial acetic acid for recrystallization, and vacuum dry to obtain 70 parts by weight of maleopimaric anhydride (MPA) with a purity of more than 95%.

[0047] (2) Dissolve the above-mentioned 70 parts by weight of maleopimaric anhydride (MPA) in an appropriate amount of N, N-dimethylformamide (DMF), and add 60 parts by weight of 5-aminoisophthalic acid. After stirring for 12 hours, the temperature was raised to 130° C. and stirred for 4 hours, cooled to room temperature, and a yellow-brown solid was formed. An appropriate amount of 150 parts by weight of distilled water was added and stirred, and a yellow precipitate formed. Filtration, washing, vacuum drying for 5 hours, repeated recrystallization with DMF and wa...

Embodiment 3

[0055] (1) Heat 100 parts by weight of rosin to 150°C under nitrogen protection, add 3 parts by weight of p-toluenesulfonic acid and hydroquinone mixture (wherein, the mass of p-toluenesulfonic acid and hydroquinone Ratio is 1: 1), 35 parts by weight of maleic anhydride, the temperature rises to 200°C, reacts for 2.5 hours, cools, adds glacial acetic acid to carry out recrystallization, and vacuum-dries to obtain 71 parts by weight of pine pine with a purity of more than 95%. Anhydride (MPA).

[0056] (2) Dissolve 71 parts by weight of maleopimaric anhydride (MPA) in an appropriate amount of N, N-dimethylformamide (DMF), and add 60 parts by weight of 2-aminoterephthalic acid. After stirring for 18 hours, the temperature was raised to 150° C. and stirred for 4 hours, cooled to room temperature, and a yellow-brown solid was formed. An appropriate amount of 150 parts by weight of distilled water was added and stirred, and a yellow precipitate formed. Filter, wash, vacuum dry for...

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Abstract

The invention discloses a rosin epoxy resin for the solidification of polyester powdery paints. The rosin epoxy resin is a compound with the structure of formula I or formula II. In the formula I or the formula II, R is an aliphatic chain segment or an aromatic chain segment. The invention also discloses a preparation method of the rosin epoxy resin. The preparation method comprises the following steps: 1, treating rosin as a raw material, adding with a catalyst I and maleic anhydride, and carrying out a Diels-Alder reaction to obtain maleopimaric acid anhydride (MPA); 2, reacting a compound containing amino and carboxyl with the MPA to prepare a rosin polyprotic acid; and 3, carrying out a series of chemical reactions on the rosin polyprotic acid, an epoxy alkylogen, a catalyst II, and an alkali to prepare the rosin epoxy resin. The rosin epoxy resin of the invention which has the advantages of environmentally friendly preparation technology, and low manufacture cost is mainly used for solidifying the polyester powdery paints.

Description

technical field [0001] The invention relates to the field of bio-based epoxy resins, in particular to a rosin-based epoxy resin and a preparation method thereof. Background technique [0002] At present, with people's increasing attention to environmental issues, the world's coatings are developing in the direction of water-based, powderized, and solvent-free, low-pollution, and pollution-free. Traditional coatings with large solvent volatilities and serious environmental pollution are facing challenges. facing great challenges. Compared with traditional coatings, powder coatings are a zero-VOC coating product with 100% solid content. Excellent, eco-friendly and economical and applicable products have become one of the most promising coating varieties in the world today. [0003] Polyester powder coating is a kind of thermosetting powder coating developed after epoxy and epoxy-polyester powder coating, which has irreplaceable importance because of its excellent weather res...

Claims

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Application Information

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IPC IPC(8): C07D405/14C09F1/04C09D7/12C09D167/00C09D5/03
Inventor 刘小青朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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