JPS6113033B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a textile softener composition that prevents yellowing and graying when textile products are repeatedly softened. Conventionally, softener compositions containing cationic activators have been used to soften textile products, but repeated softening treatments have caused problems such as yellowing and other undesirable phenomena in textile products. .
One of the causes of this yellowing is thought to be that the cationic activator promotes the adsorption or deposition of metal ions and colloidal metal compounds, especially iron, in the charged water onto textile products. For this reason, recently, a fabric softener composition that uses carboxymethyl cellulose (CMC) in combination with a cationic activator (US Pat. No. 3,360,470),
Alternatively, a softener composition (British Patent No. 1165694) has been proposed in which a chelating agent such as an oxycarboxylic acid or an aminocarboxylic acid is used in combination with a cationic activator. However, in the case of the above-mentioned softener compositions, since both use anionic carboxymethyl cellulose or a chelating agent as an anti-yellowing agent,
When a large amount of the inhibitor is added, it forms a complex with the cationic activator, reducing the softening effect, while when a small amount is added, there is almost no yellowing prevention effect.
It was extremely impractical. The present invention was made in view of the above circumstances, and it is an object of the present invention to provide a liquid textile softener composition that can prevent yellowing and graying of textile products even if the textile products are subjected to repeated softening treatments. The present invention will be explained in detail below. The fiber softener composition of the present invention has a cationic activator 2.
~12% by weight and the average number of moles of ethylene oxide added per structural unit of cellulose (degree of substitution, MS)
The main component is 0.005 to 1.0% by weight of cationically modified cellulose having an average degree of cationization (DS) of 0.2 to 0.5, which is obtained by modifying ethoxylated cellulose having a concentration of 1 to 3 with glycidyltrimethylammonium chloride. As the cationic activator used in the present invention, for example, the general formula () [However, in the formula, R ₄ is a C ₁₀ to _{C 24} linear, branched, saturated or unsaturated aliphatic group, or

[Formula] (R ₄ ' is a C ₇ to C ₃₀ linear branched alkyl group, n is 2 to 3), R ₅ is R ₄
or a _C1 - _C3 alkyl group, _R6 and _R7 represent a _C1 - _C3 alkyl group, and X represents an anion selected from a halogen atom, methylsulfate and ethylsulfate] Quaternary ammonium salt represented by or general formula () [However, R ₈ and R ₉ in the formula are C ₉ to C ₂₃ linear chains,
Branched saturated or unsaturated aliphatic group, R ₁₀ is C ₁
to _C3 alkyl, and X represents an anion selected from a halogen atom, methyl sulfate and ethyl sulfate. Specific examples of the quaternary ammonium salts represented by the above general formula () include hardened beef tallow alkyltrimethylammonium chloride, dicured beef tallow alkyldimethylammonium chloride, dioctadecyldimethylammonium chloride, di(octadecanoylamino Examples include ethyl)dimethylammonium chloride and di(hardened tallow acylaminoethyl)dimethylammonium chloride. On the other hand, some specific examples of quaternary imidazolinium salts represented by the above general formula () include methylated chloride, a reaction product of hardened beef tallow fatty acid and diethylenetriamine, and methylated methyl sulfate, a reaction product of the same reaction product. , or C ₁₈
These include methylated chloride, which is a reaction product of linear and branched mixed fatty acids synthesized by hydroformylation of α-olefin, and diethylenetriamine, and methylated methyl sulfate, which is the same reaction product. Furthermore, the cationically modified cellulose used in the present invention has the general formula It is obtained by reacting glycidyltrimethylammonium chloride with hydroxyethylcellulose, which is obtained by adding ethylene oxide to cellulose, in which two anhydroglyose units represented by are the basic units of a repeating structure. In this reaction, the average number of moles of ethylene oxide added per anhydroglucose unit (degree of substitution MS) is 1
~3. In addition, the average cationization degree DS (substitution degree of quaternization) of hydroxyethyl cellulose obtained by the reaction of cellulose and ethylene oxide is 0.2 to
It is 0.5. In addition, in this invention, an anhydroglucose unit is used as a structural unit. Furthermore, in the present invention, the content of the cation-modified cellulose is limited to a range of 0.005 to 1.0% by weight, because if the content is less than 0.005% by weight, the anti-yellowing effect cannot be achieved. If it exceeds 1.0% by weight, an improvement in the anti-yellowing effect is recognized, but this results in a decrease in the softening effect and a decrease in the uniform dispersion stability of the blended composition. In addition, in the present invention, for the purpose of improving the dispersion stability of the composition, along with the above-mentioned cationic activator and cationically modified cellulose,
Non-ionic surfactants such as ethylene oxide (5-50 mol) adducts of C ₁₀ -C ₂₂ higher alcohols, C ₈ -
An ethylene oxide (5 to 50 mol) adduct of an alkylphenol having a _C12 alkyl group may be used in combination. In this case, the amount of nonionic activator is
The content is preferably 0.1 to 3% by weight. Furthermore, in order to improve the whiteness of the object to be treated (textile product), a fluorescent whitening agent and a bluing agent may be used in combination with the above-mentioned main components, if necessary. In addition, higher alcohols, fatty acid alkanolamides, amphoteric surfactants, etc. may be used in combination. Next, a method for preparing the fiber softener composition of the present invention will be explained below by showing an example. First, the jet agitator (manufactured by Shimazaki Manufacturing Co., Ltd.: SJ
Pour a predetermined amount of water into a mixing tank equipped with a mold.
After heating to 50°C or higher, a nonionic activator and cationic modified cellulose are added and dissolved. Next, a pre-melted cationic activator is added to this solution while stirring, and after uniformly dispersing it, it is cooled to room temperature to prepare a fiber softener composition. Therefore, the textile softener composition of the present invention can significantly reduce (prevent) the yellowing of the treated object (textile product) without impairing the softening effect and the uniform dispersibility of the composition. When the softening treatment is repeatedly performed using this composition, yellowing of the treated object is significantly reduced. Although it is not clear why the softener composition of the present invention has the effect of preventing yellowing of objects to be treated, it is presumed to be due to the following effect according to research by the present inventors. In other words, when softening an object (textile product), metal ions are adsorbed on the electro-negative fiber surface together with a cationic activator, and negatively charged metal compounds are combined with the cationic activator. This composite is deposited or adsorbed on the fiber surface, causing the textile product to turn yellow and gray.
Therefore, when a predetermined amount (0.005 to 1.0% by weight) of cationically modified cellulose is blended into a composition containing a cationic activator, this cationically modified cellulose has the effect of dispersing metal ions and metal compounds in the liquid. It is thought that it prevents adsorption and deposition of metal ions and the like on the fiber surface, and as a result, exhibits the effect of preventing yellowing of the treated material. The present invention will be explained below using examples. Example First, a cotton cloth was immersed in a diastase solution at 40°C for 12 hours to decompose and remove the glue attached to the cloth, and then washed and thoroughly rinsed. A sample fabric was prepared by cutting the sample into a size of 10 x 10 cm. Next, 5.0% of a cationic activator (di-hardened beef tallow alkyldimethylammonium chloride), 0.5% of a nonionic activator (polyoxyethylene alkyl ether; C ₁₅ , = 40) and various anti-yellowing agents shown in the table below were added to ion-exchanged water. More than a dozen textile softener compositions containing desired amounts of agent were prepared. Subsequently, 0.6 g of each of these compositions was diluted with 900 ml of tap water at 25°C to prepare a treatment solution, and then test cloths prepared in advance using a Terg-O-Tometer with each treatment solution were subjected to the following conditions. The yellowing prevention effect and flexibility of the obtained sample fabrics were investigated. The results are also listed in the same table. Softening treatment conditions Terg-O-Tometer rotation speed: 120c.pm Processing bath ratio: 30 times Processing time: 3 minutes Dehydration: Centrifugal dehydrator (squeezing rate 100%) Drying: Air drying indoors (25℃, 65℃) %RH) Number of repetitions of softening treatment: 30 times The anti-yellowing effect is manufactured by Carl Zeiss
Using an Elrepho reflectance meter, the whiteness of the sample fabric was determined based on the reflectance when the reflectance of magnesium oxide was taken as 100%, and was used as a measure of yellowing prevention. In addition, flexibility was evaluated as follows based on the case where the composition was treated with a composition that did not contain an anti-yellowing agent for preventing yellowing. Flexibility equivalent to the standard: 0 points Slightly stiffer than the standard: -1 point Stiffer than the standard: -2 points

【table】

[Table] As is clear from the above table, the fiber softener compositions of the present invention containing 0.005 to 1.0% by weight of cationically modified cellulose as an anti-yellowing agent (Examples 8 to 11 in the table) are different from the conventional fiber softener compositions containing carboxymethyl cellulose. It can be seen that yellowing can be significantly prevented without causing a decrease in the softening effect compared to the softening compositions (Examples 2 to 4 in the table). A softening composition containing a larger amount of cationically modified cellulose than the blending range of the present invention (Example 12 in the table) exhibits an excellent effect in terms of preventing yellowing, but on the other hand, the softening effect decreases, making it difficult to put into practical use. It turns out that he lacks sex. As detailed above, according to the present invention, it is possible to prevent yellowing of the treated object (textile product) without impairing the softening effect and the uniform dispersion stability of the compounded composition.
In particular, it is possible to provide a fiber softener composition having excellent properties that can significantly prevent yellowing of treated objects when the softening treatment is repeated.

Claims (1)

[Claims] 1. A cationic activator with an average degree of cationization of 0.2 to 0.5, which is obtained by modifying ethoxylated cellulose with 2 to 12% by weight of a cation activator and an average number of added moles of ethylene oxide per cellulose structural unit of 1 to 3 with glycidyltrimethylammonium chloride. A fiber softener composition containing 0.005 to 1.0% by weight of modified cellulose as a main component.