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A kind of preparation method of composite antioxidant

A composite antioxidant and antioxidant technology, applied in the directions of adhesive additives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve problems such as insufficient antioxidant performance, and achieve good water resistance and viscosity. , The effect of good anti-oxidation performance and strong aging resistance

Active Publication Date: 2021-11-02
JIANGSU JIYI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing antioxidants used in hot melt adhesives usually have insufficient antioxidant properties, and the aging resistance of the prepared hot melt adhesives needs to be improved; therefore, it is also necessary to develop new antioxidants

Method used

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  • A kind of preparation method of composite antioxidant
  • A kind of preparation method of composite antioxidant

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preparation example Construction

[0018] The invention provides a preparation method of composite antioxidant, comprising the following steps.

[0019] Step 1: Mix N-phenyl-α-naphthylamine and polydimethylsiloxane and heat up to 105-115°C, add bis(2-chloroethyl)amine hydrochloride while stirring, 1-2h Then add antioxidant CY, sodium hyaluronate and methyl acrylate in sequence to adjust the pH value to 6.8-6.9; among them, N-phenyl-α-naphthylamine, polydimethylsiloxane, bis(2-chloro The mass ratio of ethyl)amine hydrochloride, antioxidant CY, sodium hyaluronate, and methyl acrylate is 1: (0.2-0.3): (0.01-0.03): (2.5-3): (0.15-0.18) : (0.4-0.6).

[0020] Step 2: Heat the mixture obtained in Step 1 to 150-160°C at a rate of 0.5-1°C / min, add glycerin after keeping it warm for 40-60min, and stir for 2-3h; among them, N-phenyl-α-naphthylamine , The mass ratio of glycerol is 1: (0.06-0.08). As a further embodiment of the present invention, while adding glycerin, it also includes the step of adding pine cone extrac...

Embodiment 1

[0024] This embodiment provides a preparation method of composite antioxidant, including the following steps.

[0025] Step 1: Mix N-phenyl-α-naphthylamine and polydimethylsiloxane, heat up to 110°C, add bis(2-chloroethyl)amine hydrochloride while stirring, and add in sequence after 1.5h Antioxidant CY, sodium hyaluronate and methyl acrylate, adjust the pH value to 6.85; among them, N-phenyl-α-naphthylamine, polydimethylsiloxane, bis(2-chloroethyl)amine salt The mass ratio of acid salt, antioxidant CY, sodium hyaluronate, and methyl acrylate is 1:0.24:0.02:2.8:0.16:0.5.

[0026] Step 2: Heat the mixture obtained in Step 1 to 155°C at a rate of 0.7°C / min, add glycerin after keeping it warm for 50min, and stir for 2.4h; wherein, the mass ratio of N-phenyl-α-naphthylamine to glycerin is 1 : 0.07.

[0027] Step 3: Cool the mixture obtained in Step 1 to 126°C at a rate of 1.4°C / min, and adjust the pH value to 8.3; then add organic compound and dipotassium glycyrrhizinate in seque...

Embodiment 2

[0029]This embodiment provides a preparation method of composite antioxidant, including the following steps.

[0030] Step 1: Mix N-phenyl-α-naphthylamine and polydimethylsiloxane, heat up to 110°C, add bis(2-chloroethyl)amine hydrochloride while stirring, and add in sequence after 1.5h Antioxidant CY, sodium hyaluronate and methyl acrylate, adjust the pH value to 6.85; among them, N-phenyl-α-naphthylamine, polydimethylsiloxane, bis(2-chloroethyl)amine salt The mass ratio of acid salt, antioxidant CY, sodium hyaluronate, and methyl acrylate is 1:0.24:0.02:2.8:0.16:0.5.

[0031] Step 2: Heat the mixture obtained in Step 1 to 155°C at a rate of 0.7°C / min, add glycerin and pinecone extract after keeping it warm for 50 minutes, and stir for 2.4 hours; among them, N-phenyl-α-naphthylamine, glycerol The mass ratio of the pine cone extract to the pine cone extract is 1:0.07:0.35; the preparation method of the pine cone extract comprises the steps of: crushing the pine cone after rem...

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Abstract

The invention relates to a preparation method of a composite antioxidant, comprising the steps of: mixing N-phenyl-α-naphthylamine and polydimethylsiloxane, then heating up to 105-115°C, adding bis(2-2- Chloroethyl) amine hydrochloride, add antioxidant CY, sodium hyaluronate and methyl acrylate in turn after 1-2h, adjust the pH value to 6.8-6.9, and then raise the temperature to 150 at a rate of 0.5-1°C / min ‑160°C, keep warm for 40‑60min, then add glycerin, stir for 2‑3h, then cool down to 120‑130°C, adjust the pH to 8.2‑8.4, then add organic compound and dipotassium glycyrrhizinate in turn, react while stirring 4‑5h to obtain compound antioxidants. The composite antioxidant provided by the invention has good oxidation resistance, and the hot melt adhesive prepared by using the composite antioxidant has strong aging resistance, good water resistance and viscosity, and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of binders, in particular to a method for preparing a composite antioxidant. Background technique [0002] Hot melt adhesive is a solid meltable polymer that does not require solvents and does not contain 100% moisture; it is solid at room temperature, and when heated and melted to a certain temperature, it becomes a fluid and viscous liquid; after melting EVA hot melt adhesive, light brown or white. EVA hot melt adhesive has a wide range of applications and the largest amount of use. It has excellent adhesive properties and almost has thermal adhesion to various materials; excellent electrical properties; and its low melt viscosity is convenient for sizing; and other compounding agents Good compatibility and other characteristics. EVA hot melt adhesives have been widely used in many fields such as book binding, food packaging, plastic bonding, ceramic repairing, mounting, clothing, shoes and hats molding,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/06C09J11/08
CPCC09J11/06C09J11/08
Inventor 郭骄阳
Owner JIANGSU JIYI NEW MATERIAL CO LTD