阅读说明：本技术 一种新型液体荧光增白剂 (Novel liquid fluorescent whitening agent ) 是由 王刚 王真祥 甘宏宇 张红坡 张云 于 2018-08-25 设计创作，主要内容包括：本发明公开了一种新型液体荧光增白剂,一种新型液体荧光增白剂,其组成成分包含：10-30％的荧光增白剂染料,2-6％的聚乙二醇,5-20％的二乙二醇,10-25％的吐温80,0.5-2％的EDTA-2Na,15-25％的丙二醇,10-25％的尿素,以及剩余组分量的去离子水,其中荧光增白剂染料为磺酸基苯乙烯基联苯(CBS)化合物,其分子式为C<Sub>28</Sub>H<Sub>20</Sub>O<Sub>6</Sub>S<Sub>2</Sub>M<Sub>2</Sub>,其结构式如图1所示,式中：M代表氢、碱金属、镁或铵盐,磺酸基的取代位置可以是乙烯基的邻位、间位或对位；通过不同的配比,有效解决了原液体荧光增白剂在使用过程中存在稳定性差,稳定时间短,稳定时间只在半年左右,且原液体荧光增白剂加水稀释还会变浑浊的问题,该新型液体增白剂稳定时间长,稳定时间超过两年,可与水以任何比例互溶不浑浊。(The invention discloses a novel liquid fluorescent whitening agent, which comprises the following components: 10-30% of fluorescent whitening agent dye, 2-6% of polyethylene glycol, 5-20% of diethylene glycol, 10-25% of tween 80, 0.5-2% of EDTA-2Na, 15-25% of propylene glycol, 10-25% of urea and the balance of deionized water, wherein the fluorescent whitening agent dye is used for fluorescent whiteningThe dye is sulfo styryl biphenyl (CBS) compound with molecular formula of C 28 H 20 O 6 S 2 M 2 The structural formula is shown as figure 1, wherein: m represents hydrogen, alkali metal, magnesium or ammonium salt, and the substitution position of the sulfonic acid group can be the ortho-position, the meta-position or the para-position of the vinyl; through different proportions, the problem that the original liquid fluorescent whitening agent has poor stability in the using process, the stabilization time is short, the stabilization time is only about half a year, and the original liquid fluorescent whitening agent can become turbid after being diluted by water is solved.)

1. A novel liquid fluorescent whitening agent is characterized by comprising the following components in percentage by weight:

wherein the fluorescent whitening agent dye is a sulfostyryl biphenyl (CBS) compound with a molecular formula of C₂₈H₂₀O₆S₂M₂The structural formula is shown in figure 1;

in the formula: m represents hydrogen, alkali metal, magnesium or ammonium salt, and the substitution position of the sulfonic acid group can be ortho-position, meta-position or para-position of the vinyl group.

2. The novel liquid fluorescent whitening agent according to claim 1, wherein the molecular weight of the polyethylene glycol compound is between 200 and 5000.

3. The novel liquid fluorescent whitening agent according to claim 1, wherein tween-80 is polyoxyethylene sorbitan monooleate, polysorbate-80 for short, and is used as an emulsifier.

4. The novel liquid fluorescent whitening agent according to claim 1, wherein the substituted compounds at different positions of the sulfostyrylbiphenyl (CBS) compound have the structural formulae shown in fig. 2 to 4.

Technical Field

The invention belongs to the technical field of detergents or printing and dyeing, and particularly relates to a novel liquid fluorescent whitening agent.

Background

The high-grade fluorescent whitening agents which are generally commercially available for detergents and printing and dyeing are powdery or granular products which have the disadvantages of dust pollution during the manufacturing and using processes and are not easy to automatically meter and add, and are not beneficial to environmental protection and health of operators. The invention of the liquid fluorescent whitening agent not only overcomes the difficulties, but also has the characteristics of strong fluorescence, high whiteness, clear and transparent appearance, convenient use, easy automation control and the like. The solid fluorescent whitening agent CBS is a compound which has sulfonic acid groups and is easy to dissolve in water, but the solid fluorescent whitening agent CBS has low solubility in water, has high solubility only at high temperature (such as 80-100 ℃), and has lower solubility when the temperature is reduced, so that the solid fluorescent whitening agent CBS is not easy to prepare a simple aqueous solution, has high concentration and is stable and not easy to precipitate. In recent years, liquid fluorescent whitening agents CBS containing surfactants have been reported in many patents;

patent GB 2,294,708 reports a formulation of a liquid brightener in a solvent of polyethylene glycol and water with the addition of a small amount of PVOH, but they report a product with a stability time of only 5 days at 50 ℃; chinese patent CN1,179,466 reports a method for preparing a liquid brightener by using a mixture of polyoxyethylene ether and water as a solvent, but the patent does not describe the stability and the storage time, so that the liquid brightener lacks certain practical value; likewise, U.S. Pat. No. 8, 6,660,705 reports liquid formulations with fatty alcohol-polyoxyethylene ethers and glycerol as mixed solvents, but this patent also fails to show their stabilizing properties; patent CN1480519 also reports a process for the preparation of liquid brighteners using mixtures of nonylphenol polyoxyethylene ether, glycerol and water as solvents, but nonylphenol compounds have become a banned variety in europe for the washing industry.

The liquid fluorescent whitening agent of the prior art with the patent number of CN200510012469.8 has poor stability and short stabilization time in the using process, only about half a year, and the fluorescent whitening agent can become turbid after being diluted by water.

Disclosure of Invention

The invention provides a novel liquid fluorescent whitening agent, and aims to solve the problems that in the use process of a liquid fluorescent whitening agent with the prior art, the stability is poor, the stabilization time is short, the stability is only about half a year, and the fluorescent whitening agent can become turbid after being diluted by water.

The invention is realized in such a way that a novel liquid fluorescent whitening agent comprises the following components in percentage by weight:

wherein the fluorescent whitening agent dye is a sulfostyryl biphenyl (CBS) compound with a molecular formula of C₂₈H₂₀O₆S₂M₂The structural formula is shown in figure 1;

in the formula: m represents hydrogen, alkali metal, magnesium or ammonium salt, and the substitution position of the sulfonic acid group can be ortho-position, meta-position or para-position of the vinyl group.

Preferably, the molecular weight of the polyethylene glycol compound is between 200 and 5000, and preferably 200 and 600.

Preferably, the tween-80 is polyoxyethylene sorbitan monooleate, which is called polysorbate-80 for short, and is used as an emulsifier.

Preferably, the structural formulas of the substituents at different positions of the sulfostyryl biphenyl (CBS) compound are shown in figures 2-4.

The novel liquid fluorescent whitening agents of the present invention are prepared by the following process:

adding water with required water quantity into a reaction kettle, adding fluorescent brightener dye into the reaction kettle, stirring uniformly, adding polyethylene glycol 300, diethylene glycol, tween 80, EDTA-2Na, propylene glycol and the rest water with required quantity into the reaction kettle, heating to above 90 ℃ to dissolve and clarify, keeping the temperature for 2 hours, slowly cooling to 40 ℃, adding urea with required quantity, continuously stirring to completely dissolve the urea, continuously cooling to room temperature, and standing until bubbles completely disappear.

Compared with the prior art, the invention has the beneficial effects that: the novel liquid fluorescent whitening agent effectively solves the problems that the original liquid fluorescent whitening agent has poor stability and short stabilization time in the use process, the stability is only about half a year, and the fluorescent whitening agent can become turbid after being diluted by water through different proportions.

It should be understood that the foregoing is illustrative of the preferred embodiments of the present invention and that numerous changes and modifications may be made by those skilled in the art without departing from the principles of the invention, which are also to be considered as within the scope of the invention.

Drawings

FIG. 1 is a schematic structural view of a sulfostyrylbiphenyl (CBS) compound of the present invention;

FIG. 2 is a schematic structural diagram of ortho-substitution of a sulfostyrylbiphenyl (CBS) compound according to the present invention;

FIG. 3 is a schematic structural diagram of meta-substitution of a sulfostyrylbiphenyl (CBS) compound according to the present invention;

FIG. 4 is a schematic structural diagram of para-substitution of a sulfostyrylbiphenyl (CBS) compound of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.