Yellowing-resistant hydrophilic organic silicon softener and preparation method thereof

Abstract

The invention discloses an anti-yellowing hydrophilic organic silicon softening agent which comprises the following components in percentage by weight: 1%-20% of zwitterionic amino silicon oil, 3%-8% of polyether-terminated epoxy silicone oil, 3%-8% of epoxy-terminated silicone oil, 5%-20% of ester quaternary ammonium salt, 1%-10% of nonionic emulsifier, 0.1%-0.5% of organic acid and the balance of deionized water. The yellowing-resistant hydrophilic organic silicon softener disclosed by the invention is extremely good in quality stability and excellent in yellowing resistance, a fabric is endowed with relatively good soft hand feeling, and the hydrophilicity is also greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fabric finishing agents, and particularly relates to a yellowing-resistant hydrophilic silicone softener. Background Art

[0002] During the processing, storage, and transportation of textiles, since most packaging materials are made of polyethylene polymer materials and most contain phenolic substances such as 2,6-di-tert-butyl-4-methylphenol (abbreviated as BHT), obvious yellowing will occur under external packaging and humid and hot conditions, which is commonly known as phenolic yellowing, affecting the appearance, strength, and wearability. In addition, during the fabric softening process, the amino groups in the softener will gradually react with nitrogen oxides in the air, resulting in yellowing and color change of textiles, and different ammonia value softeners affect the phenolic yellowing grade of fabrics during softening finishing.

[0003] Traditional amino silicone oil is used to prepare silicone textile softeners. Due to different ammonia values, after use, the phenolic yellowing grades of textiles are different, and generally, a low phenolic yellowing property above level 4 cannot be achieved. At the same time, the hydrophilicity and hand feeling of fabrics treated with traditional amino silicone oil also need to be improved. Summary of the Invention

[0004] The present invention aims at the above problems, improves the formula of the existing silicone softener with amino silicone oil as the functional component, and provides a yellowing-resistant hydrophilic silicone softener with a high yellowing-resistant grade and strong hydrophilicity. To achieve this purpose, the technical solutions provided by the present invention are as follows:

[0005] In the first aspect of the present invention, there is provided a yellowing-resistant hydrophilic silicone softener, comprising the following components in percentage by weight: zwitterionic amino silicone oil is 1% - 20%, polyether-terminated epoxy silicone oil is 3% - 8%, terminal epoxy silicone oil is 3% - 8%, ester quaternary ammonium salt is 5% - 20%, non-ionic emulsifier is 1% - 10%, organic acid is 0.1 - 0.5%, and the balance is deionized water.

[0006] Preferably, the yellowing-resistant hydrophilic silicone softener provided by the present invention further has the following technical features: the general formula of the zwitterionic amino silicone oil is as follows,

[0007]

[0008] wherein, R1 is an alkyl, alkoxy, or hydroxyl group with 1 - 5 carbon atoms; R2 is a methyl or hydroxyl group; R3 is a monoamine group; R4 is an anion-modified monoamine group; x, y, and z are all positive integers, and 5 ≤ x + y + z ≤ 100.

[0009] Preferably, the yellowing-resistant hydrophilic silicone softener provided by the present invention further has the following technical features:

[0010]

[0011] Preferably, the yellowing-resistant hydrophilic silicone softener provided by the present invention further has the following technical features: the weight-average molecular weight of the polyether-terminated epoxy silicone oil is 6,000 - 25,000, and the weight-average molecular weight of the terminal epoxy silicone oil is 8,000 - 20,000.

[0012] Preferably, the yellowing-resistant hydrophilic silicone softener provided by the present invention further has the following technical features: the ester quaternary ammonium salt is one or a combination of triethanolamine ester quaternary ammonium salt and N,N-bis(amidoethyl)-methyl quaternary ammonium salt.

[0013] Preferably, the yellowing-resistant hydrophilic silicone softener provided by the present invention further has the following technical features: the non-ionic emulsifier is isomeric alcohol polyoxyethylene ether or secondary alcohol polyoxyethylene ether.

[0014] Preferably, the yellowing-resistant hydrophilic silicone softener provided by the present invention further has the following technical features: the organic acid is a sulfonic acid-based organic acid.

[0015] In the second aspect of the present invention, a preparation method of the above-mentioned yellowing-resistant hydrophilic silicone softener is provided, including the following steps: according to the above raw material ratio, first add the zwitterionic amino silicone oil, polyether-terminated epoxy silicone oil, terminal epoxy silicone oil and non-ionic emulsifier into a variable-speed mixer and stir evenly, then add the ester quaternary ammonium salt and stir, and finally slowly add the organic acid and deionized water according to the ratio for emulsification reaction; stir evenly and package.

[0016] Due to the adoption of the above technical solution, the present invention has the following advantages and beneficial effects:

[0017] In terms of yellowing resistance, the zwitterionic amino silicone oil, in combination with the polyether-terminated epoxy silicone oil and the terminal epoxy silicone oil, reduces the yellowing performance of the fabric after finishing.

[0018] In terms of hydrophilicity, the zwitterionic amino silicone oil retains some unmodified amino silicone oil, and at the same time increases the anionic hydrophilic group, quaternary ammonium cation group and hydroxyl group. After the silk fabric is finished with this silicone oil emulsion, it has the soft and elegant handfeel of the silk fabric finished with amino silicone oil, and at the same time reduces the yellowing of the fabric; the hydroxyl group in the silicone oil structure can carry out dehydration condensation with the hydroxyl group and carboxyl group in the fabric, improving its reactivity and wash resistance; the presence of quaternary ammonium cations in the silicone oil structure can improve the fluffiness of the silk fabric after finishing. The ester quaternary ammonium salt in this softener not only has low irritation, but also can effectively improve the handfeel and hydrophilic performance of the treated fabric when compounded with the zwitterionic amino silicone oil. The non-ionic emulsifier can effectively improve the emulsification effect during the preparation of the softener and enhance the stability of the softener. The organic acid, as a pH regulator, can further improve the quality stability of the softener. Detailed Embodiments

[0019] To more clearly illustrate the present invention, the present invention will be further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0020] Example 1

[0021] The yellowing-resistant hydrophilic silicone softener provided in this example includes the following components by weight percentage: zwitterionic amino silicone oil is 1%, polyether-terminated epoxy silicone oil is 3%, terminal epoxy silicone oil is 3%, ester quaternary ammonium salt is 5%, non-ionic emulsifier is 1%, organic acid is 0.1%, and the balance is deionized water.

[0022] Among them, the general formula of the zwitterionic amino silicone oil is as follows,

[0023]

[0024] Among them, R1 is alkoxyethyl; R2 is methyl;

[0025]

[0026] X = 20, y = 20, z = 60.

[0027] The weight average molecular weight of the polyether-terminated epoxy silicone oil is 6000 - 25000, and the weight average molecular weight of the terminal epoxy silicone oil is 8000 - 20000;

[0028] The ester quaternary ammonium salt is N,N-bis(amidoethyl)-methyl quaternary ammonium salt; the non-ionic emulsifier is secondary alcohol polyoxyethylene ether; the organic acid is SDS;

[0029] The preparation method is as follows: According to the above raw material ratio, first add zwitterionic amino silicone oil, polyether-terminated epoxy silicone oil, terminal epoxy silicone oil and non-ionic emulsifier to a variable-speed mixer and stir evenly, then add ester quaternary ammonium salt and stir, and finally slowly add organic acid and deionized water according to the ratio for emulsification reaction; stir evenly and package.

[0030] Example 2

[0031] The yellowing-resistant hydrophilic silicone softener provided in this example includes the following components by weight percentage: zwitterionic amino silicone oil is 10%, polyether-terminated epoxy silicone oil is 5%, terminal epoxy silicone oil is 6%, ester quaternary ammonium salt is 12%, non-ionic emulsifier is 5%, organic acid is 0.3%, and the balance is deionized water.

[0032] Among them, the general formula of the zwitterionic amino silicone oil is as follows,

[0033]

[0034] Among them, R1 is ethyl; R2 is methyl;

[0035]

[0036] X = 10, y = 10, z = 50.

[0037] The weight-average molecular weight of the polyether-terminated epoxy silicone oil is 6000 - 25000, and the weight-average molecular weight of the epoxy silicone oil at the end is 8000 - 20000;

[0038] The ester quaternary ammonium salt is triethanolamine ester quaternary ammonium salt; the non-ionic emulsifier is isomeric alcohol polyoxyethylene ether; the organic acid is SDS;

[0039] The preparation method is as follows: According to the above raw material ratio, first add the zwitterionic amino silicone oil, polyether-terminated epoxy silicone oil, epoxy silicone oil at the end and non-ionic emulsifier to a variable-speed mixer and stir evenly, then add the ester quaternary ammonium salt and stir, and finally slowly add the organic acid and deionized water according to the ratio for emulsification reaction; stir evenly and pack.

[0040] Example 3

[0041] The yellowing-resistant hydrophilic silicone softener provided in this example includes the following components in terms of weight percentage: 20% of zwitterionic amino silicone oil, 8% of polyether-terminated epoxy silicone oil, 8% of epoxy silicone oil at the end, 20% of ester quaternary ammonium salt, 10% of non-ionic emulsifier, 0.5% of organic acid, and the balance is deionized water.

[0042] Among them, the general formula of the zwitterionic amino silicone oil is as follows,

[0043]

[0044] Among them, R1 is hydroxyl; R2 is hydroxyl;

[0045]

[0046] X = 5, y = 10, z = 70.

[0047] The weight-average molecular weight of the polyether-terminated epoxy silicone oil is 6000 - 25000, and the weight-average molecular weight of the epoxy silicone oil at the end is 8000 - 20000;

[0048] The ester quaternary ammonium salt is triethanolamine ester quaternary ammonium salt; the non-ionic emulsifier is isomeric alcohol polyoxyethylene ether; the organic acid is SDS;

[0049] The preparation method is as follows: According to the above raw material ratio, first add zwitterionic amino silicone oil, polyether-terminated epoxy silicone oil, epoxy-terminated silicone oil and non-ionic emulsifier into a variable-speed mixer and stir evenly, then add ester quaternary ammonium salt and stir, and finally slowly add organic acid and deionized water according to the ratio for emulsification reaction; stir evenly and package.

[0050] Prepare a finishing solution with a concentration of 10 g / L from the products prepared in the above three examples, and finish a white silk fabric with a yarn specification of 2.8 tex. After two-bath two-roll padding, the liquor pickup is controlled at 60%, and after drying at 120 °C and waiting for the moisture regain, the following performance tests are carried out:

[0051] (1) Handfeel

[0052] The handfeel is evaluated by 5 experienced professionals using the touch method. Grade 1 indicates the worst handfeel, and grade 5 indicates the best handfeel.

[0053] (2) Hydrophilicity

[0054] It is measured according to AATCC 79-2000 "Determination of Water Absorbency of Textiles". The faster the absorption time, the better the surface hydrophilicity.

[0055] (3) Whiteness

[0056] The whiteness is detected by an SBDY-1 digital display whiteness meter. The larger the value, the better the whiteness.

[0057] The test results are shown in Table 1 below:

[0058] Table 1 Summary of Physical Properties of Yellowing-Resistant Hydrophilic Organosilicone Softener

[0059] Appearance Grey cloth Example 1 Example 2 Example 3 Hand feeling / grade 1 4 4 4 Hydrophilicity / s 120 8 7 9 Whiteness / % 72 70.3 69.8 69.2

[0060] The yellowing-resistant hydrophilic organosilicone softeners prepared in Examples 1 to 3 of the present invention not only have excellent quality stability, but as can be seen from Table 1, the pure white silk fabrics treated with the yellowing-resistant hydrophilic organosilicone softeners prepared in Examples 1 to 3 not only have excellent yellowing resistance, but also have a good soft handfeel, and the hydrophilicity is also greatly improved.

[0061] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the above-mentioned disclosed technical content to obtain equivalent embodiments with equivalent changes, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A yellowing-resistant hydrophilic silicone softener, characterized in that, Comprising the following components by weight percentage: zwitterionic amino silicone oil is 1% - 20%, polyether-terminated epoxy silicone oil is 3% - 8%, terminal epoxy silicone oil is 3% - 8%, ester quaternary ammonium salt is 5% - 20%, non-ionic emulsifier is 1% - 10%, organic acid is 0.1 - 0.5%, and the balance is deionized water.

2. The yellowing-resistant hydrophilic silicone softener according to claim 1, characterized in that: Among them, The general formula of the zwitterionic amino silicone oil is as follows, wherein, R1 is an alkyl, alkoxy or hydroxyl group of C1 - C5; R2 is a methyl or hydroxyl group; R3 is a monoamine group; R4 is an anion-modified monoamine group; x, y, and z are all positive integers, and 5 ≤ x + y + z ≤ 100.

3. The yellowing-resistant hydrophilic silicone softener according to claim 2, characterized in that:

4. The yellowing-resistant hydrophilic silicone softener according to claim 1, characterized in that: Among them, The weight-average molecular weight of the polyether-terminated epoxy silicone oil is 6000 - 25000, and the weight-average molecular weight of the terminal epoxy silicone oil is 8000 - 20000.

5. The yellowing-resistant hydrophilic silicone softener according to claim 2, characterized in that: Among them, The ester quaternary ammonium salt is one or a combination of triethanolamine ester quaternary ammonium salt and N,N-bis(amidoethyl)-methyl quaternary ammonium salt.

6. The yellowing-resistant hydrophilic silicone softener according to claim 1, characterized in that: Among them, The non-ionic emulsifier is isomeric alcohol polyoxyethylene ether or secondary alcohol polyoxyethylene ether.

7. The yellowing-resistant hydrophilic silicone softener according to claim 1, characterized in that: Among them, The organic acid is a sulfonic acid-based organic acid.

8. The preparation method of the yellowing-resistant hydrophilic organosilicon softener according to any one of claims 1 to 7, characterized in that, Including the following steps: according to the above raw material ratio, first add zwitterionic amino silicone oil, polyether-terminated epoxy silicone oil, terminal epoxy silicone oil and non-ionic emulsifier to a variable-speed mixer and stir evenly, then add ester quaternary ammonium salt and stir, and finally slowly add organic acid and deionized water according to the ratio for emulsification reaction; stir evenly and package.

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