CN-121992663-A - Softening agent for jean fabric and application thereof

Abstract

The invention provides a softening agent for jean fabric and application thereof, wherein the softening agent comprises a sulfonate modified polyether polysiloxane segmented copolymer, an acid regulator and water, wherein the sulfonate modified polyether polysiloxane segmented copolymer is prepared by ring-opening copolymerization of epoxy-terminated silicone oil and a modified amine component under a heating condition, and the modified amine component is a reaction product of dodecylbenzene sulfonic acid and diethanolamine. The modified organic silicon softener overcomes the defects that the existing organic silicon softener has poor stability, is easy to break emulsion and has single handfeel style and is difficult to consider fluffy feeling and hydrophilicity in the finishing process of heavy water washing and high electrolyte of jean fabric, and can endow the fabric with excellent fluffiness and hydrophilicity while tolerating strong alkali and high-salt environments.

Inventors

• LI XIAODONG
• LI YUANYUAN
• Li Bingtu
• CHEN HONGWU
• ZHANG LINGMIN
• ZHAO JIAHUI
• JIANG LEI
• ZUO YIMING

Assignees

• 浙江超宇新材料科技有限公司

Dates

Publication Date

20260508

Application Date

20260409

Claims (10)

1. 1. The softener for the jean fabric is characterized by comprising the following components: (A) Sulfonate modified polyether polysiloxane block copolymers; (B) An acid regulator; (C) Water; wherein the sulfonate modified polyether polysiloxane segmented copolymer of the component (A) is prepared by ring-opening copolymerization reaction of epoxy-terminated silicone oil and modified amine component under the heating condition; The modified amine component is the reaction product of dodecylbenzenesulfonic acid and diethanolamine.
2. 2. The softener according to claim 1, wherein the modified amine component is prepared by mixing dodecylbenzenesulfonic acid and diethanolamine in a molar ratio of 1 (1.0-1.3) in a solvent and reacting at room temperature; the reaction mass ratio of the epoxy-terminated silicone oil to the modified amine component is 100 (6.0-7.0); the temperature of the ring-opening copolymerization reaction is 80 ℃, and the heat preservation time is 6-8 hours.
3. 3. The softener of claim 1, wherein the epoxy-terminated silicone oil is prepared by hydrosilylation of a hydrogen-terminated silicone oil with allyl glycidyl ether in the presence of a catalyst; The addition amount of the allyl glycidyl ether enables the conversion rate of active hydrogen in hydrogen-terminated silicone oil to reach more than 95%; The viscosity of the hydrogen-terminated silicone oil is 40-900 cs, and the hydrogen content is 0.009-0.053%.
4. 4. A softener according to claim 3, characterized in that the hydrogen terminated silicone oil is prepared by equilibration reaction of octamethyl cyclotetrasiloxane and tetramethyl dihydro disiloxane in the presence of an acidic catalyst; wherein the mass ratio of the octamethyl cyclotetrasiloxane to the tetramethyl dihydrodisiloxane is 100 (0.67-3.48); The acid catalyst is concentrated sulfuric acid, and the reaction temperature is 30 ℃.
5. 5. The softener according to claim 1, wherein the softener comprises the following components in parts by weight: (A) 30 parts of sulfonate modified polyether polysiloxane block copolymer; (B) 0.5-2.0 parts of an acid regulator; (C) 70 parts of water.
6. 6. The softener of claim 5 wherein the acidity regulator is glacial acetic acid; the preparation method of the softener comprises the steps of adding the component (B) into the component (A) under the stirring condition, stirring uniformly, and then slowly adding the component (C) in batches for emulsification.
7. 7. The softener of claim 2 wherein the solvent is selected from one or more of isopropanol, ethylene glycol, diethylene glycol during the preparation of the modified amine component; The diethanolamine is selected from industrial-grade diethanolamine with purity of more than 98 percent.
8. 8. A softener according to claim 3, wherein the allyl glycidyl ether is allyl epoxy polyether, and the molar ratio of ethylene oxide to propylene oxide in the polyether segment is (6-8): 2-4.
9. 9. The softener according to any one of claims 1 to 8, characterized in that the physical and chemical properties of the softener are such that the softener is resistant to 10g/L of anhydrous sodium sulfate electrolyte, resistant to alkaline environment with a pH value of 10 and resistant to high temperature treatment at 100 ℃ without demulsification at a concentration of 20 g/L.
10. 10. Use of a softener according to any one of claims 1-9 in the after-finishing of cotton fabrics, characterized in that the cotton fabrics comprise all-cotton jean, polyester-cotton jean or stretch jean; The application mode is dipping or padding, and the treated fabric is dried and shaped at 170 ℃.

Description

Softening agent for jean fabric and application thereof Technical Field The invention relates to the technical field of jean fabrics, in particular to a softener for jean fabrics and application thereof. Background As a fashion and cultural symbol, the unique style of jeans is often dependent on complex post-finishing processes such as stone milling, enzyme washing, bleaching, and soft finishing. With the improvement of the wearing experience requirements of consumers, the high-quality jean fabric not only needs to have good moisture absorption and air permeability, but also has extremely high requirements on the hand feeling, namely, pursuing a comprehensive style which is soft, stiff, smooth and plump and solid (commonly known as 'meat feeling' or 'Q spring feeling' in industry). However, the conventional organosilicon auxiliary agent currently applied to jean finishing is generally provided with the technical bottleneck of 'easy-to-lose', namely the conventional amino silicone oil which is the most widely applied softener at present, has three fatal defects, namely the hand feeling tends to be greasy and soft, the fluffy and thick feel required by jean is lacked, the hydrophobic nature of the conventional amino silicone oil causes poor fabric hygroscopicity, the fabric is sultry and sultry, the amino in the structure is extremely easy to oxidize, the light-colored jean is subjected to serious yellowing problem, the polyether modified silicone oil solves the problems of hydrophilicity and yellowing, the finishing effect of the polyether modified silicone oil is often too dry and thin to give the fabric sufficient high-grade feel and softness due to the lack of active groups capable of being interacted with fibers, the conventional cation/quaternary ammonium salt modified silicone oil is tried to introduce quaternary ammonium salt groups in the industry in order to improve the hydrophilicity, the conventional synthetic process is mostly provided with benzyl chloride or short-chain quaternizing agents, the prepared emulsion has serious short plates in stability, and particularly in the post finishing process, the dye is prevented from being stained back (anti-stained) and the jean electrolyte is usually added into a large amount of sodium sulfate, and the jean alkaline aqueous solution is usually alkaline. Under the severe conditions of high salt, high alkali and high temperature drying, the traditional quaternary ammonium salt silicone oil is extremely easy to generate demulsification and drifting, and silicon spots which are difficult to remove are formed on the surface of the fabric, so that huge economic loss is caused. Disclosure of Invention The invention provides a softener for jean fabric and application thereof, which are used for overcoming the defects that the existing organosilicon softener is poor in stability, easy to break emulsion, single in handfeel style and difficult to consider fluffy feeling and hydrophilicity in the finishing process of heavy water washing and high electrolyte of jean fabric, and providing a modified organosilicon softener which can resist strong alkali and high-salt environment and endow the fabric with excellent fluffiness and hydrophilicity. In order to achieve the above purpose, the present invention provides the following technical solutions: the softener for the jean fabric comprises (A) a sulfonate modified polyether polysiloxane segmented copolymer, (B) an acid regulator and (C) water, wherein the sulfonate modified polyether polysiloxane segmented copolymer of the component (A) is prepared by ring-opening copolymerization of epoxy-terminated silicone oil and a modified amine component under a heating condition, and the modified amine component is a reaction product of dodecylbenzene sulfonic acid and diethanolamine. In order to achieve the above purpose, the present invention also provides the following technical solutions: The application of the softening agent in the after-finishing of cotton fabric comprises all-cotton jean, polyester-cotton jean or elastic jean fabric, wherein the application mode is dipping or padding, and the treated fabric is dried and shaped at 170 ℃. Compared with the prior art, the invention has the following beneficial effects: 1. The invention utilizes the large-volume anionic groups to realize specific fluffy/plump hand feeling; The invention generates modified amine component by selecting dodecylbenzene sulfonic acid (DBSA) to react with diethanolamine, and the dodecylbenzene sulfonate is introduced into polysiloxane chain segment. Unlike conventional small molecule acid radicals (such as acetate and hydrochloride), dodecyl benzene sulfonate has a huge hydrophobic long chain and benzene ring structure; The microstructure is changed, macroscopically, the jean fabric is endowed with a thick, plump and elastic 'meat feel', and the microstructure is obviously different from the simple 'smooth feel' of common amino silicone oil or the