Light stabilizer 298 and manufacturing process thereof

Abstract

The present invention discloses a manufacturing process of a light stabilizer 298. The process provides a crude product which is synthesized through the reaction of methyl oleate and light stabilizer intermediate 2, 2, 6, 6-tetramethyl piperidinol in quantitative petroleum ether under the condition with a load catalyst tetrabutyl phthalicate, the methyl oleate is extracted with waste oil and has no toxicity or methyl oleate groups of large component, and the methyl oleate is added into the light stabilizer to prepare a novel highly efficient and non-toxic light stabilizer. On one hand, the light stability is maintained in the structure of the product; on the other hand, the adoption of double bond activity groups can lead the processing of the product into an auxiliary agent of larger molecular weight. The present invention can be used in the plastic packing, in particular in the food packing, and has excellent prospects for application.

Description

Technical field:

[0001] The invention relates to a light stabilizer and a manufacturing process thereof, in particular to a high-efficiency, multi-functional, non-toxic light stabilizer 298 product that can be used on food packaging bags and a preparation method thereof. Background technique:

[0002] As an additive for food packaging, light stabilizer 3853 is widely used, but because it contains a small amount of tin-containing metals and the product does not contain double bonds, it is very difficult to synthesize in the direction of macromolecules, so it is easy to produce migration, thus affected its scope of application. Invention content:

[0003] The object of the present invention is to provide an environmentally friendly, efficient, multi-functional, non-toxic light stabilizer and production method.

[0004] The technical solution of the present invention is: a light stabilizer 298, characterized in that: the molecular structural formula of the light stabilizer 2...

Examples

Embodiment 1

[0018] Preparation

[0019] (a) In a 500ml reaction flask equipped with a condenser, reflux tube, thermometer, stirrer, dropping funnel and nitrogen inlet, 2,2,6,6-tetramethyl Put piperidinol, 0.3mol (87g) methyl oleate, and 60g solvent petroleum ether into the reactor, start the agitator at 110°C, and start heating the reactor at the same time, first raise the temperature to about 110°C for dehydration, and dehydration is completed. Then add 0.8g of supported tetrabutyl phthalate catalyst, raise the temperature to 120-125°C to reflux for demethanolization reaction, and when the extracted methanol reaches the theoretical amount, take a sample for analysis and if it is qualified, the synthesis is completed.

[0020] (b) post-treatment: cool the material synthesized in (a) and add 5g of activated carbon, reflux for 2 hours, heat filter the loaded tetrabutyl phthalate catalyst and activated carbon with a Buchner funnel at 85-90°C, and filter. Begin to remove petroleum ether with...

Embodiment 2

[0024] (a) In a 500ml reaction flask equipped with a condenser, reflux tube, thermometer, stirrer, dropping funnel and nitrogen inlet, 2,2,6,6-tetramethyl Put piperidinol, 0.3mol (87g) methyl oleate, and 60g solvent petroleum ether into the reactor, start the agitator at 110°C, and start heating the reactor at the same time, first raise the temperature to about 110°C for dehydration, and dehydration is completed. Then add 0.5g of tetrabutyl phthalate catalyst, heat up to 120-125°C and reflux for demethanolization reaction. When the extracted methanol reaches the theoretical amount, take a sample for analysis and if it is qualified, the synthesis is completed.

[0025] (b) Post-treatment: add 100g of water to the synthesized material in (a), wash it once, add 5g of activated carbon, reflux at 105-110°C for dehydration and dehydration, and use a Buchner funnel to filter at 85-95°C to complete the filtration , began to remove petroleum ether with a circulating water vacuum pump u...

Technical field:

[0001] The invention relates to a light stabilizer and a manufacturing process thereof, in particular to a high-efficiency, multi-functional, non-toxic light stabilizer 298 product that can be used on food packaging bags and a preparation method thereof. Background technique:

[0002] As an additive for food packaging, light stabilizer 3853 is widely used, but because it contains a small amount of tin-containing metals and the product does not contain double bonds, it is very difficult to synthesize in the direction of macromolecules, so it is easy to produce migration, thus affected its scope of application. Invention content:

[0003] The object of the present invention is to provide an environmentally friendly, efficient, multi-functional, non-toxic light stabilizer and production method.

[0004] The technical solution of the present invention is: a light stabilizer 298, characterized in that: the molecular structural formula of the light stabilizer 2...

Examples

Embodiment 1

[0018] Preparation

[0019] (a) In a 500ml reaction flask equipped with a condenser, reflux tube, thermometer, stirrer, dropping funnel and nitrogen inlet, 2,2,6,6-tetramethyl Put piperidinol, 0.3mol (87g) methyl oleate, and 60g solvent petroleum ether into the reactor, start the agitator at 110°C, and start heating the reactor at the same time, first raise the temperature to about 110°C for dehydration, and dehydration is completed. Then add 0.8g of supported tetrabutyl phthalate catalyst, raise the temperature to 120-125°C to reflux for demethanolization reaction, and when the extracted methanol reaches the theoretical amount, take a sample for analysis and if it is qualified, the synthesis is completed.

[0020] (b) post-treatment: cool the material synthesized in (a) and add 5g of activated carbon, reflux for 2 hours, heat filter the loaded tetrabutyl phthalate catalyst and activated carbon with a Buchner funnel at 85-90°C, and filter. Begin to remove petroleum ether with...

Embodiment 2

[0024] (a) In a 500ml reaction flask equipped with a condenser, reflux tube, thermometer, stirrer, dropping funnel and nitrogen inlet, 2,2,6,6-tetramethyl Put piperidinol, 0.3mol (87g) methyl oleate, and 60g solvent petroleum ether into the reactor, start the agitator at 110°C, and start heating the reactor at the same time, first raise the temperature to about 110°C for dehydration, and dehydration is completed. Then add 0.5g of tetrabutyl phthalate catalyst, heat up to 120-125°C and reflux for demethanolization reaction. When the extracted methanol reaches the theoretical amount, take a sample for analysis and if it is qualified, the synthesis is completed.

[0025] (b) Post-treatment: add 100g of water to the synthesized material in (a), wash it once, add 5g of activated carbon, reflux at 105-110°C for dehydration and dehydration, and use a Buchner funnel to filter at 85-95°C to complete the filtration , began to remove petroleum ether with a circulating water vacuum pump u...

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