Reaction type thioester antioxidant and preparation method

Abstract

The invention relates to a reaction type thioester antioxidant and a preparation method of the reaction type thioester antioxidant. The preparation method comprises the following steps of carrying out a Michael addition reaction on acrylic acid or methyl acrylate and sulfur alcohol, thus obtaining thioether acrylic acid; carrying out an esterification reaction on the obtained thioether acrylic acid and partial hydroxyl in polyhydric alcohol, thus obtaining thioether acrylic polyol ester; carrying out transesterification on the methyl acrylate or methyl methacrylate and residual hydroxyl in the obtained thioether acrylic polyolm ester, thus generating the reaction type thioester antioxidant. A reaction type thioester compound obtained through the preparation method disclosed by the invention contains a C=C double bond, and the C=C double bond can directly react with a polymer monomer to form an integrated body, so that the problem of environment pollution caused by volatilization of the reaction type thioester antioxidant is solved; a thioether functional group has certain reducibility, can be transformed and processed to prepare raw materials of other more high-end performance products. The reaction type thioester antioxidant is non-discoloring in aspects of petroleum resin, PU (Poly Urethane), plastics and the like, and is easy to disperse and excellent in anti-aging performance.

Description

[technical field]

[0001] The invention relates to the technical field of antioxidants, in particular to reactive thioester antioxidants and a preparation method. [Background technique]

[0002] With the prolongation of use time, polymer materials often suffer from aging phenomenon, making them lose their use value. In order to inhibit, prevent or delay the aging of polymer materials, maintain the performance of materials, and prolong the life of materials, the most commonly used method is to add some antioxidants that can delay oxidative aging. Due to their own structural characteristics, traditional antioxidants will be heated during processing and use, or as time goes by, they can continue to be extracted into the atmosphere, soil and water through volatilization, migration, and solvent extraction, causing environmental pollution. Pollution is large, thus causing potential impact on human health; the same traditional antioxidants of thioesters are no exception.

[0003] ...

Examples

Embodiment Construction

[0031] Hereinafter, the present invention will be further described in conjunction with the examples. It should be understood that the examples are only for illustration and not intended to limit the protection scope of the present invention.

[0032] The preparation process route of the present invention is as follows:

[0033]

[0034] Among them, R is H or methyl, R 1 For saturated straight chain hydrocarbon C a h 2a+1 (a≤26);

[0035] R 0 (OH) n It is a polyhydric alcohol with more than two valences (two to tetrahydric alcohols), R 0 is a hydrocarbon group, an ether group or an ester group,

[0036] The ether group can be a hydrocarbon ether group containing an ether bond,

[0037] The ester group can be a hydrocarbon ester group containing an ester bond,

[0038] 2≤n≤6, m

[0039] (n=2~6)R 0 For hydrocarbon groups, such as P-1, P-2, P-5, P-6, etc.; R 0 For ethers, such as P-3, P-10, P-12, P-13, etc.; R 0 For esters, s...

[technical field]

[0001] The invention relates to the technical field of antioxidants, in particular to reactive thioester antioxidants and a preparation method. [Background technique]

[0002] With the prolongation of use time, polymer materials often suffer from aging phenomenon, making them lose their use value. In order to inhibit, prevent or delay the aging of polymer materials, maintain the performance of materials, and prolong the life of materials, the most commonly used method is to add some antioxidants that can delay oxidative aging. Due to their own structural characteristics, traditional antioxidants will be heated during processing and use, or as time goes by, they can continue to be extracted into the atmosphere, soil and water through volatilization, migration, and solvent extraction, causing environmental pollution. Pollution is large, thus causing potential impact on human health; the same traditional antioxidants of thioesters are no exception.

[0003] ...

Examples

Embodiment Construction

[0031] Hereinafter, the present invention will be further described in conjunction with the examples. It should be understood that the examples are only for illustration and not intended to limit the protection scope of the present invention.

[0032] The preparation process route of the present invention is as follows:

[0033]

[0034] Among them, R is H or methyl, R 1 For saturated straight chain hydrocarbon C a h 2a+1 (a≤26);

[0035] R 0 (OH) n It is a polyhydric alcohol with more than two valences (two to tetrahydric alcohols), R 0 is a hydrocarbon group, an ether group or an ester group,

[0036] The ether group can be a hydrocarbon ether group containing an ether bond,

[0037] The ester group can be a hydrocarbon ester group containing an ester bond,

[0038] 2≤n≤6, m

[0039] (n=2~6)R 0 For hydrocarbon groups, such as P-1, P-2, P-5, P-6, etc.; R 0 For ethers, such as P-3, P-10, P-12, P-13, etc.; R 0 For esters, s...

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