A dimethyl silicone oil fabric finishing agent and its preparation method

Abstract

This invention discloses a dimethyl silicone oil fabric finishing agent, comprising the following components by weight percentage: 2%–10% dimethyl silicone oil, 4%–10% polyether-terminated epoxy silicone oil, 30%–50% n-butanol, 5%–20% ester-based quaternary ammonium salt, 1%–10% nonionic emulsifier, 0.1%–0.5% organic acid, and the balance being deionized water. This dimethyl silicone oil fabric finishing agent not only exhibits excellent quality stability and superior resistance to yellowing, but also imparts a soft hand feel to fabrics and significantly improves their hydrophilicity.

Description

Technical Field

[0001] This invention belongs to the field of fabric finishing agent technology, specifically relating to a dimethyl silicone oil fabric finishing agent and its preparation method. Background Technology

[0002] Fabric finishing is a technical treatment method that gives fabrics color effects, shape effects (smoothness, nap, crispness, etc.) and practical effects (waterproof, non-felt shrinkage, wrinkle-free, mothproof, flame retardant, etc.). Fabric finishing is a process that improves the appearance and feel of fabrics, enhances their performance, or endows them with special functions through chemical or physical methods. It is a process of "adding icing on the cake" for textiles.

[0003] In the finishing process of textiles, softeners are used to treat the fabrics to make them softer and fluffier, improving their touch and appearance. Current technology uses polyamino silicone oil as a softener for this purpose. However, due to varying ammonia values, the degree of phenolic yellowing in the textiles varies after use, generally failing to achieve a low phenolic yellowing level of 4 or higher. During the softening process, the amino groups in the softener gradually react with nitrogenous and oxygen-containing substances in the air, causing yellowing and discoloration of the textiles. This also negatively impacts the fabric's moisture absorption, breathability, and fluffiness. Summary of the Invention

[0004] This invention addresses the aforementioned problems by further improving upon previous patents, providing a dimethyl silicone oil fabric finishing agent that exhibits high resistance to yellowing, strong hydrophilicity, and is easy to formulate. To achieve this objective, the technical solution provided by this invention is as follows:

[0005] In a first aspect, the present invention provides a dimethyl silicone oil fabric finishing agent comprising the following components by weight percentage: 2% to 10% dimethyl silicone oil, 4% to 10% polyether-terminated epoxy silicone oil, 30% to 50% n-butanol, 5% to 20% ester-based quaternary ammonium salt, 1% to 10% nonionic emulsifier, 0.1% to 0.5% organic acid, with the balance being deionized water.

[0006] Preferably, the dimethyl silicone oil fabric finishing agent provided by the present invention also has the following technical features: the viscosity of the dimethyl silicone oil is less than 18 cs.

[0007] Preferably, the dimethyl silicone oil fabric finishing agent provided by the present invention also has the following technical features: the dimethyl silicone oil fabric finishing agent preferably includes the following components by weight percentage: 5% to 8% dimethyl silicone oil, 4% to 6% polyether-terminated epoxy silicone oil, 40% to 50% n-butanol, 5% to 12% ester-based quaternary ammonium salt, 3% to 5% nonionic emulsifier, 0.1% to 0.5% organic acid, and the balance being deionized water.

[0008] Preferably, the dimethyl silicone oil fabric finishing agent provided by the present invention also has the following technical features: the weight average molecular weight of the polyether-terminated epoxy silicone oil is 6000-25000.

[0009] Preferably, the dimethyl silicone oil fabric finishing agent provided by the present invention also has the following technical features: the ester-based quaternary ammonium salt is one or a combination of triethanolamine ester-based quaternary ammonium salt and N,N-di(amidoethyl)-methyl quaternary ammonium salt.

[0010] Preferably, the dimethyl silicone oil fabric finishing agent provided by the present invention also has the following technical features: the nonionic emulsifier is an isomeric alcohol polyoxyethylene ether or a secondary alcohol polyoxyethylene ether.

[0011] Preferably, the dimethyl silicone oil fabric finishing agent provided by the present invention also has the following technical features: the organic acid is a sulfonic acid organic acid.

[0012] A second aspect of the present invention provides a method for preparing the dimethyl silicone oil fabric finishing agent described above, comprising the following steps: according to the above raw material ratio, first add dimethyl silicone oil, polyether-terminated epoxy silicone oil, n-butanol and nonionic emulsifier to a variable speed mixer and stir evenly, then add ester-based quaternary ammonium salt and stir, and finally slowly add organic acid and deionized water according to the ratio to emulsify the reaction; stir evenly and dispense.

[0013] By adopting the above technical solution, the present invention has the following advantages and beneficial effects:

[0014] Regarding yellowing resistance, the combination of dimethyl silicone oil, polyether-terminated epoxy silicone oil, and n-butanol reduces the yellowing performance of the finished fabric. In terms of hydrophilicity, the addition of n-butanol enhances the hydrophilic properties of the finishing agent.

[0015] Fabrics treated with the finishing agent of this invention possess a soft and fluffy hand feel, while also reducing yellowing. The hydroxyl groups in the silicone oil structure can undergo dehydration condensation with the hydroxyl and carboxyl groups in the fabric, improving its reactivity and wash resistance. The presence of quaternary ammonium cations in the silicone oil structure enhances the fluffiness of the treated fabric. The ester-based quaternary ammonium salt in this softener is not only less irritating but also effectively improves the hand feel and hydrophilicity of the treated fabric. The nonionic emulsifier effectively improves the emulsification effect during softener preparation, enhancing the softener's stability. Organic acids, acting as pH adjusters, further improve the quality stability of the softener. Detailed Implementation

[0016] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments, further clarifies the invention. Those skilled in the art should understand that the specific descriptions below are illustrative rather than restrictive, and should not be construed as limiting the scope of protection of the present invention.

[0017] Example 1

[0018] The dimethyl silicone oil fabric finishing agent provided in this embodiment comprises the following components in weight percentages: 5% dimethyl silicone oil, 4% polyether-terminated epoxy silicone oil, 40% n-butanol, 7% ester-based quaternary ammonium salt, and 2% nonionic emulsifier.

[0019] % organic acids, 0.1%, and the remainder is deionized water.

[0020] Among them, the weight-average molecular weight of polyether-terminated epoxy silicone oil is 6000-15000.

[0021] The ester-based quaternary ammonium salt is N,N-di(amidoethyl)-methyl quaternary ammonium salt; the nonionic emulsifier is secondary alcohol polyoxyethylene ether; the organic acid is SDS.

[0022] The preparation method is as follows: According to the above raw material ratio, dimethyl silicone oil, polyether-terminated epoxy silicone oil, n-butanol and nonionic emulsifier are first stirred evenly in a variable speed mixer, then ester-based quaternary ammonium salt is added and stirred, and finally organic acid and deionized water are slowly added according to the ratio for emulsification reaction; after stirring evenly, the mixture is dispensed.

[0023] Example 2

[0024] The dimethyl silicone oil fabric finishing agent provided in this embodiment comprises the following components in the following weight percentages: 8% dimethyl silicone oil, 6% polyether-terminated epoxy silicone oil, 50% n-butanol, 12% ester-based quaternary ammonium salt, and 7% nonionic emulsifier.

[0025] % organic acids, 0.3%, and the remainder is deionized water.

[0026] Among them, the weight-average molecular weight of polyether-terminated epoxy silicone oil is 10,000-25,000;

[0027] The ester-based quaternary ammonium salt is triethanolamine ester-based quaternary ammonium salt; the nonionic emulsifier is isomeric alcohol polyoxyethylene ether; the organic acid is SDS;

[0028] The preparation method is as follows: According to the above raw material ratio, dimethyl silicone oil, polyether-terminated epoxy silicone oil, n-butanol and nonionic emulsifier are first stirred evenly in a variable speed mixer, then ester-based quaternary ammonium salt is added and stirred, and finally organic acid and deionized water are slowly added according to the ratio for emulsification reaction; after stirring evenly, the mixture is dispensed.

[0029] Example 3

[0030] The dimethyl silicone oil fabric finishing agent provided in this embodiment includes the following components in the following weight percentages: 10% dimethyl silicone oil, 8% polyether-terminated epoxy silicone oil, 50% n-butanol, 20% ester-based quaternary ammonium salt, 10% nonionic emulsifier, 0.5% organic acid, and the balance being deionized water.

[0031] Among them, the weight-average molecular weight of polyether-terminated epoxy silicone oil is 15,000-25,000.

[0032] The ester-based quaternary ammonium salt is triethanolamine ester-based quaternary ammonium salt; the nonionic emulsifier is isomeric alcohol polyoxyethylene ether; the organic acid is SDS;

[0033] The preparation method is as follows: According to the above raw material ratio, dimethyl silicone oil, polyether-terminated epoxy silicone oil, n-butanol and nonionic emulsifier are first stirred evenly in a variable speed mixer, then ester-based quaternary ammonium salt is added and stirred, and finally organic acid and deionized water are slowly added according to the ratio for emulsification reaction; after stirring evenly, the mixture is dispensed.

[0034] The products prepared in the above three embodiments were used to prepare a finishing solution of 10 g / L for white silk fabric with a yarn specification of 2.8. After two dips and two nips, with the liquid retention rate controlled at 60%, and after drying at 120℃ and allowing it to regain moisture, the following performance tests were conducted:

[0035] (1) Feel

[0036] The feel was assessed by five experienced professionals using a tactile method. A rating of 1 indicates the worst feel, and a rating of 5 indicates the best feel.

[0037] (2) Hydrophilicity

[0038] According to AATCC 79-2000 "Determination of water absorption of textiles", the faster the absorption time, the better the surface hydrophilicity.

[0039] (3) Whiteness

[0040] Whiteness was measured using an SBDY-1 digital whiteness meter; the higher the value, the better the whiteness.

[0041] The test results are shown in Table 1 below:

[0042] Table 1 Summary of Physical Properties of Dimethyl Silicone Oil Fabric Finishing Agents

[0043] Appearance Greige fabric Example 1 Example 2 Example 3 feel / grade 1 4 4 4 hydrophilicity / s 7 10 11 9 Whiteness / % 72 70.2 69.7 69.5

[0044] The dimethyl silicone oil fabric finishing agents prepared in Examples 1-3 of this invention not only have excellent quality stability, but also, as can be seen from Table 1, the pure white silk fabrics treated with the dimethyl silicone oil fabric finishing agents prepared in Examples 1-3 not only have excellent resistance to yellowing, but also have a good soft hand feel, and their hydrophilicity is also greatly improved.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A dimethicone fabric conditioner, characterized in that, It comprises the following components by weight percentage: 2%–10% dimethyl silicone oil, 4%–10% polyether-terminated epoxy silicone oil, 30%–50% n-butanol, 5%–20% ester-based quaternary ammonium salt, 1%–10% nonionic emulsifier, 0.1%–0.5% organic acid, and the balance being deionized water.

2. The dimethyl silicone oil fabric finishing agent according to claim 1, characterized in that: wherein The viscosity of the dimethyl silicone oil is less than 18 cs.

3. The dimethicone fabric conditioner of claim 2, wherein: The dimethyl silicone oil fabric finishing agent comprises the following components by weight percentage: 5%–8% dimethyl silicone oil, 4%–6% polyether-terminated epoxy silicone oil, 40%–50% n-butanol, 5%–12% ester-based quaternary ammonium salt, 3%–5% nonionic emulsifier, 0.1%–0.5% organic acid, and the balance being deionized water.

4. The dimethyl silicone oil fabric finishing agent according to claim 1, characterized in that: wherein The polyether-terminated epoxy silicone oil has a weight-average molecular weight of 6000-25000.

5. The dimethyl silicone oil fabric finishing agent according to claim 2, characterized in that: wherein The ester-based quaternary ammonium salt is one or a combination of triethanolamine ester-based quaternary ammonium salt and N,N-di(amidoethyl)-methyl quaternary ammonium salt.

6. The dimethyl silicone oil fabric finishing agent according to claim 1, characterized in that: wherein The nonionic emulsifier is an isomeric alcohol polyoxyethylene ether or a secondary alcohol polyoxyethylene ether.

7. The dimethyl silicone oil fabric finishing agent according to claim 1, characterized in that: wherein The organic acid is a sulfonic acid.

8. Process for the preparation of a dimethicone fabric conditioner according to any of claims 1 to 7, characterised in that, The process includes the following steps: According to the above raw material ratio, first add dimethyl silicone oil, polyether-terminated epoxy silicone oil, n-butanol and nonionic emulsifier to a variable speed mixer and stir evenly. Then add ester-based quaternary ammonium salt and stir. Finally, slowly add organic acid and deionized water according to the ratio to carry out the emulsification reaction. Stir evenly and then dispense.