Alkyd resin for amino baking paint and preparation method thereof

Abstract

The invention discloses alkyd resin for amino baking paint and a preparation method thereof. The alkyd resin for amino baking paint is prepared from the following components: 10 to 15 parts of dry or half-dry vegetable oil acid, 10 to 15 parts of triatomic alcohol with side chains, 5 to 10 parts of dihydric alcohol with side chains, 20 to 30 parts of phthalic anhydride, 1 to 3 parts of adipic acid, 0.05 to 0.2 part of esterification catalyst, 1 to 5 parts of dimethylbenzene, and 30 to 40 parts of organic solvent. The compositions and the proportions of the raw materials are screened through a lot of experiments, the component proportion is scientific and reasonable, and the alkyd resin for the amino baking paint has good flexibility, shock resistance, rigidity and weather resistance, and is wide in application range. The preparation method of the alkyd resin for amino baking paint is low in production cost, high in preparation efficiency, reasonable in whole process design, strong in operability and easy to implement.

Description

technical field

[0001] The invention relates to a resin, in particular to an alkyd resin for amino baking varnish and a preparation method thereof. Background technique

[0002] Alkyd amino baking varnish is an important industrial paint, mainly used in light industrial machinery, home appliances, coils and vehicles, but the flexibility, impact resistance, hardness and weather resistance of ordinary alkyd amino baking varnish cannot meet high requirements standard. In places with higher requirements, saturated polyester amino baking varnish is generally used. Its hardness and weather resistance are very good, but the raw materials of saturated polyester are not easy to obtain, the price is high, and the production cost is high, so it is not easy to popularize and apply.

[0003] Therefore, it is very necessary to develop and design a kind of alkyd resin for amino baking varnish with excellent flexibility, impact resistance, hardness and weather resistance, low production co...

Examples

Embodiment 1

[0031] 1. An alkyd resin for amino baking varnish, which is made of the following raw materials in parts by weight:

[0032] 15 parts of soy oil, 15 parts of trimethylolpropane, 10 parts of methylpropanediol, 30 parts of phthalic anhydride, 3 parts of adipic acid, 0.2 parts of dibutyltin as an esterification catalyst, 5 parts of xylene, and 40 parts of toluene.

[0033] 2, the preparation method of alkyd resin for amino baking varnish, comprises the following steps:

[0034] (1) 15 parts of soy oil, 15 parts of trimethylolpropane, 10 parts of methylpropanediol, 30 parts of phthalic anhydride, 3 parts of adipic acid, 0.2 parts of dibutyltin esterification catalyst, and 5 parts of xylene are put into the reaction kettle, Stir to mix well;

[0035] (2) Introduce nitrogen or carbon dioxide protective gas to remove oxygen in the reaction kettle. When the temperature is raised to 180°C, the esterification reaction is carried out for 4 hours, and then the temperature is raised to 19...

Embodiment 2

[0038] 1. An alkyd resin for amino baking varnish, which is made of the following raw materials in parts by weight:

[0039] 10 parts of sunflower oil, 10 parts of trimethylolethane, 5 parts of neopentyl glycol, 20 parts of phthalic anhydride, 1 part of adipic acid, 0.05 parts of stannous octoate, 1 part of xylene, 30 parts of butanol .

[0040] 2, the preparation method of alkyd resin for amino baking varnish, comprises the following steps:

[0041] (1) 10 parts of sunflower acid, 10 parts of trimethylolethane, 5 parts of neopentyl glycol, 20 parts of phthalic anhydride, 1 part of adipic acid, 0.05 parts of stannous octoate as an esterification catalyst, and 1 part of refluxed xylene , put into the reaction kettle, stir and mix evenly;

[0042] (2) Introduce nitrogen protective gas to remove oxygen in the reaction kettle. When the temperature is raised to 190°C, the esterification reaction is carried out for 3 hours, and then the temperature is raised to 190°C~210°C to carr...

Embodiment 3

[0045] 1. An alkyd resin for amino baking varnish, which is made of the following raw materials in parts by weight:

[0046] 13 parts of cottonoleic acid, 12 parts of trimethylolpropane, 5 parts of 2-ethyl-2-butylpropanediol, 23 parts of phthalic anhydride, 2 parts of adipic acid, 0.1 part of esterification catalyst monobutyltin oxide, xylene 2 parts, 36 parts of ethylene glycol butyl ether.

[0047] 2, the preparation method of alkyd resin for amino baking varnish, comprises the following steps:

[0048] (1) 13 parts of cottonoleic acid, 12 parts of trimethylolpropane, 5 parts of 2-ethyl-2-butylpropanediol, 23 parts of phthalic anhydride, 2 parts of adipic acid, 0.1 parts of esterification catalyst monobutyltin oxide 2 parts and 2 parts of reflux xylene are dropped into the reactor, stirred and mixed evenly;

[0049](2) Feed nitrogen protective gas, remove oxygen in the reaction kettle, when the temperature is raised to 190°C, the esterification reaction is carried out for ...

technical field

[0001] The invention relates to a resin, in particular to an alkyd resin for amino baking varnish and a preparation method thereof. Background technique

[0002] Alkyd amino baking varnish is an important industrial paint, mainly used in light industrial machinery, home appliances, coils and vehicles, but the flexibility, impact resistance, hardness and weather resistance of ordinary alkyd amino baking varnish cannot meet high requirements standard. In places with higher requirements, saturated polyester amino baking varnish is generally used. Its hardness and weather resistance are very good, but the raw materials of saturated polyester are not easy to obtain, the price is high, and the production cost is high, so it is not easy to popularize and apply.

[0003] Therefore, it is very necessary to develop and design a kind of alkyd resin for amino baking varnish with excellent flexibility, impact resistance, hardness and weather resistance, low production co...

Examples

Embodiment 1

[0031] 1. An alkyd resin for amino baking varnish, which is made of the following raw materials in parts by weight:

[0032] 15 parts of soy oil, 15 parts of trimethylolpropane, 10 parts of methylpropanediol, 30 parts of phthalic anhydride, 3 parts of adipic acid, 0.2 parts of dibutyltin as an esterification catalyst, 5 parts of xylene, and 40 parts of toluene.

[0033] 2, the preparation method of alkyd resin for amino baking varnish, comprises the following steps:

[0034] (1) 15 parts of soy oil, 15 parts of trimethylolpropane, 10 parts of methylpropanediol, 30 parts of phthalic anhydride, 3 parts of adipic acid, 0.2 parts of dibutyltin esterification catalyst, and 5 parts of xylene are put into the reaction kettle, Stir to mix well;

[0035] (2) Introduce nitrogen or carbon dioxide protective gas to remove oxygen in the reaction kettle. When the temperature is raised to 180°C, the esterification reaction is carried out for 4 hours, and then the temperature is raised to 19...

Embodiment 2

[0038] 1. An alkyd resin for amino baking varnish, which is made of the following raw materials in parts by weight:

[0039] 10 parts of sunflower oil, 10 parts of trimethylolethane, 5 parts of neopentyl glycol, 20 parts of phthalic anhydride, 1 part of adipic acid, 0.05 parts of stannous octoate, 1 part of xylene, 30 parts of butanol .

[0040] 2, the preparation method of alkyd resin for amino baking varnish, comprises the following steps:

[0041] (1) 10 parts of sunflower acid, 10 parts of trimethylolethane, 5 parts of neopentyl glycol, 20 parts of phthalic anhydride, 1 part of adipic acid, 0.05 parts of stannous octoate as an esterification catalyst, and 1 part of refluxed xylene , put into the reaction kettle, stir and mix evenly;

[0042] (2) Introduce nitrogen protective gas to remove oxygen in the reaction kettle. When the temperature is raised to 190°C, the esterification reaction is carried out for 3 hours, and then the temperature is raised to 190°C~210°C to carr...

Embodiment 3

[0045] 1. An alkyd resin for amino baking varnish, which is made of the following raw materials in parts by weight:

[0046] 13 parts of cottonoleic acid, 12 parts of trimethylolpropane, 5 parts of 2-ethyl-2-butylpropanediol, 23 parts of phthalic anhydride, 2 parts of adipic acid, 0.1 part of esterification catalyst monobutyltin oxide, xylene 2 parts, 36 parts of ethylene glycol butyl ether.

[0047] 2, the preparation method of alkyd resin for amino baking varnish, comprises the following steps:

[0048] (1) 13 parts of cottonoleic acid, 12 parts of trimethylolpropane, 5 parts of 2-ethyl-2-butylpropanediol, 23 parts of phthalic anhydride, 2 parts of adipic acid, 0.1 parts of esterification catalyst monobutyltin oxide 2 parts and 2 parts of reflux xylene are dropped into the reactor, stirred and mixed evenly;

[0049](2) Feed nitrogen protective gas, remove oxygen in the reaction kettle, when the temperature is raised to 190°C, the esterification reaction is carried out for ...