A kind of darkening agent and preparation method thereof

Abstract

The invention provides a darkening agent for fabric finishing. The darkening agent includes by mass fraction: 12-66% monomer, 0.1-3% cross-linking agent, 0.05-2% glacial acetic acid, 0.1%-1% emulsifier; the balance is deionized water. The darkening agent of the present invention can form a covering film on the surface of the fiber and partially embed the fiber to form a diamond-like crystal, form diffuse reflection of light on the surface of the fiber, and simultaneously form multiple refraction and reflection on the light, thereby enhancing the color of the colored fabric. Deep effect, especially for dark fabrics.

Description

technical field

[0001] The invention relates to the field of textile auxiliaries, in particular to a darkening agent and a preparation method thereof. Background technique

[0002] Among the three major synthetic fibers, polyester has the simplest process, the largest output, the most widely used, and the cheapest price; because of its special molecular structure, there is no specific group that can be dyed on the molecular chain, and the polarity is also small. During the dyeing process, dye molecules are not easy to enter the fiber, so its dyeability is poor, which leads to poor dyeing depth of polyester.

[0003] Facing the dyeing problem of polyester, in the actual production process of the dyeing factory, a larger amount of disperse dyes will be added to increase the color depth; however, different customers have different requirements for the depth of fabrics. For example, in the black fabric market, "Arabian black "It is very representative of black style fabrics. T...

Examples

Embodiment 1

[0026] In this embodiment, a darkening agent is provided. The specific preparation is as follows:

[0027] Step S10. Pre-emulsification: Weigh 109g butyl acrylate, 30g methyl methacrylate, 3.5g hydroxyethyl methacrylate, 2.2g methacryloyloxyethyltrimethylammonium chloride, 0.6g cationic emulsifier 1831, 1.2g of non-ionic emulsifier EFS-630, 0.23g of ammonium persulfate, 1g of glacial acetic acid and 135g of deionized water were added to the reaction flask, and the stirring speed of the mixer was controlled at about 2000rpm at room temperature, and stirred for 30 minutes to prepare a milky white pre-emulsion.

[0028] Step S20. Preparation of seed emulsion: first weigh 40 g of the pre-emulsion obtained in step S10, then weigh 0.6 g of cationic emulsifier 1831, 1.2 g of nonionic emulsifier EFS-630, 0.23 g of ammonium persulfate and 210 g of deionized water Add them together into a reaction four-neck flask, then connect a thermometer, a condenser tube, and a nitrogen tube, and ...

Embodiment 2

[0031] In this embodiment, a darkening agent is provided. The specific preparation is as follows:

[0032] Step S10. Pre-emulsification: Weigh 80.5g butyl acrylate, 23.2g isooctyl acrylate, 35.8g methyl methacrylate, 3.5g hydroxyethyl methacrylate, 2.2g methacryloyloxyethyl trimethyl Add ammonium chloride, 0.6g cationic emulsifier 1831, 1.2g nonionic emulsifier EFS-630, 0.23g ammonium persulfate, 1g glacial acetic acid and 135g deionized water into the reaction flask, and control the stirring speed of the mixer at about 2000rpm at room temperature , and stirred for 30 minutes to prepare a milky white pre-emulsion.

[0033]Step S20. Preparation of seed emulsion: first weigh 40 g of the pre-emulsion obtained in step S10, then weigh 0.6 g of cationic emulsifier 1831, 1.2 g of nonionic emulsifier EFS-630, 0.23 g of ammonium persulfate and 210 g of deionized water Add them together into a reaction four-neck flask, then connect a thermometer, a condenser tube, and a nitrogen tube,...

Embodiment 3

[0036] In this embodiment, a darkening agent is provided. The specific preparation is as follows:

[0037] Step S10. Pre-emulsification: Weigh 80.5g butyl acrylate, 23.2g isooctyl acrylate, 35.8g methyl methacrylate, 3.7g 1,6-hexanediol diacrylate, 2.2g methacryloyloxyethyl Trimethylammonium chloride, 0.5g cationic emulsifier tallow trimethylammonium chloride, 1.0g nonionic emulsifier EFS-630, 0.23g ammonium persulfate, 1g glacial acetic acid and 138g deionized water were added to the reaction flask In the process, control the stirring speed of the stirrer at about 2000rpm at normal temperature, and stir for 30 minutes to prepare a milky white pre-emulsion.

[0038] Step S20. Preparation of seed emulsion: first weigh 40 g of the pre-emulsion obtained in step S10, then weigh 0.5 g of cationic emulsifier tallow trimethylammonium chloride, 1.0 g of nonionic emulsifier EFS-630, 0.23 g of Ammonium sulfate and 210 g of deionized water were added into the reaction four-necked flask...

technical field

[0001] The invention relates to the field of textile auxiliaries, in particular to a darkening agent and a preparation method thereof. Background technique

[0002] Among the three major synthetic fibers, polyester has the simplest process, the largest output, the most widely used, and the cheapest price; because of its special molecular structure, there is no specific group that can be dyed on the molecular chain, and the polarity is also small. During the dyeing process, dye molecules are not easy to enter the fiber, so its dyeability is poor, which leads to poor dyeing depth of polyester.

[0003] Facing the dyeing problem of polyester, in the actual production process of the dyeing factory, a larger amount of disperse dyes will be added to increase the color depth; however, different customers have different requirements for the depth of fabrics. For example, in the black fabric market, "Arabian black "It is very representative of black style fabrics. T...

Examples

Embodiment 1

[0026] In this embodiment, a darkening agent is provided. The specific preparation is as follows:

[0027] Step S10. Pre-emulsification: Weigh 109g butyl acrylate, 30g methyl methacrylate, 3.5g hydroxyethyl methacrylate, 2.2g methacryloyloxyethyltrimethylammonium chloride, 0.6g cationic emulsifier 1831, 1.2g of non-ionic emulsifier EFS-630, 0.23g of ammonium persulfate, 1g of glacial acetic acid and 135g of deionized water were added to the reaction flask, and the stirring speed of the mixer was controlled at about 2000rpm at room temperature, and stirred for 30 minutes to prepare a milky white pre-emulsion.

[0028] Step S20. Preparation of seed emulsion: first weigh 40 g of the pre-emulsion obtained in step S10, then weigh 0.6 g of cationic emulsifier 1831, 1.2 g of nonionic emulsifier EFS-630, 0.23 g of ammonium persulfate and 210 g of deionized water Add them together into a reaction four-neck flask, then connect a thermometer, a condenser tube, and a nitrogen tube, and ...

Embodiment 2

[0031] In this embodiment, a darkening agent is provided. The specific preparation is as follows:

[0032] Step S10. Pre-emulsification: Weigh 80.5g butyl acrylate, 23.2g isooctyl acrylate, 35.8g methyl methacrylate, 3.5g hydroxyethyl methacrylate, 2.2g methacryloyloxyethyl trimethyl Add ammonium chloride, 0.6g cationic emulsifier 1831, 1.2g nonionic emulsifier EFS-630, 0.23g ammonium persulfate, 1g glacial acetic acid and 135g deionized water into the reaction flask, and control the stirring speed of the mixer at about 2000rpm at room temperature , and stirred for 30 minutes to prepare a milky white pre-emulsion.

[0033]Step S20. Preparation of seed emulsion: first weigh 40 g of the pre-emulsion obtained in step S10, then weigh 0.6 g of cationic emulsifier 1831, 1.2 g of nonionic emulsifier EFS-630, 0.23 g of ammonium persulfate and 210 g of deionized water Add them together into a reaction four-neck flask, then connect a thermometer, a condenser tube, and a nitrogen tube,...

Embodiment 3

[0036] In this embodiment, a darkening agent is provided. The specific preparation is as follows:

[0037] Step S10. Pre-emulsification: Weigh 80.5g butyl acrylate, 23.2g isooctyl acrylate, 35.8g methyl methacrylate, 3.7g 1,6-hexanediol diacrylate, 2.2g methacryloyloxyethyl Trimethylammonium chloride, 0.5g cationic emulsifier tallow trimethylammonium chloride, 1.0g nonionic emulsifier EFS-630, 0.23g ammonium persulfate, 1g glacial acetic acid and 138g deionized water were added to the reaction flask In the process, control the stirring speed of the stirrer at about 2000rpm at normal temperature, and stir for 30 minutes to prepare a milky white pre-emulsion.

[0038] Step S20. Preparation of seed emulsion: first weigh 40 g of the pre-emulsion obtained in step S10, then weigh 0.5 g of cationic emulsifier tallow trimethylammonium chloride, 1.0 g of nonionic emulsifier EFS-630, 0.23 g of Ammonium sulfate and 210 g of deionized water were added into the reaction four-necked flask...

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