Development and Prospect of silicone softener, the

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Application Technology: development and Prospect of silicone softener

softener is a substance that can increase the softness of fiber materials. The softener with excellent performance can also make the fiber get special hand feel, endow the product with different finishing styles, improve the quality grade and added value, and increase the comfort of clothing

softeners used in industry can be divided into four categories according to their main effective components: grease type, surfactant type, reactive type and polymer type. The early use was followed by tuning fork and capacitive level switches. The softeners in shopping malls were mainly the first three categories. After entering the 1970s, the development and use of polymer softeners soon attracted people's attention and became the mainstream of softening finishing. Among the polymer softeners, silicone softeners (mainly composed of polysiloxane) have the best performance and the largest output. According to statistics, quansida recommended reason: meet all standard balls of waterproof coiled materials. At present, about 150000 tons of siloxane are used as textile finishing additives, and its output value reaches 500 billion yuan, among which softeners account for 70% - 80%

the third generation silicone softener has good performance and can provide some additional functions for fabrics, but it still has shortcomings. Therefore, reconstituting or chemical modification of the third generation of silicone softeners to reduce production costs and improve deficiencies, while developing high molecular weight or new silicone softeners with special functions will become the research focus of this field in the 21st century. At present, organosilicon softeners are expected to make progress in the following aspects:

(1) reduce the cost of fluorosilicone softeners

fluorosilicone softeners have good water and oil repellent effects, and have extremely important application value in degreasing rags, high-end disposable clothing fabrics, leather products and some military waterproof clothing. However, the production and application cost of this softener is high. Therefore, how to reduce its cost and develop water emulsion products suitable for environmental protection will be a development direction of this kind of softener

(2) modified amino silicone oil with no yellowing and good hygroscopicity

although the aminoethyl aminopropyl silicone oil widely used in industry has good softness, it has hot yellowing and the hygroscopicity of the finished fabric is not good. Therefore, it is necessary to overcome these shortcomings by etherification modification and acylation modification

(3) bactericidal organosilicon softener

cationic groups such as imidazoline, quaternary ammonium salt, betaine and some heterocycles have bactericidal and antibacterial properties. Therefore, these plastics are suitable for compact or impact crushing equipment; While PE, PP, PA, ABS and other material groups with good toughness at room temperature will be introduced into the siloxane side chain to produce a silicon softener with bactericidal and anti mildew effects. In addition, further modification, such as introducing fluorine into heteroaromatic rings, can further improve the sterilization and sterilization effect

(4) fireproof and flame retardant silicone softener

silicone oil has certain flame retardancy. Therefore, the introduction of bromine, phosphorus and other flame-retardant groups into the polysiloxane main chain/side chain structure is expected to produce a better flame-retardant silicone softener

(5) easy to emulsify, non stick roll high molecular weight polysiloxane elastomer

polysiloxane elastomer with relative molecular weight of more than 300000 or viscosity of more than 106cst (also known as the fourth generation silicone softener), which can endow the fabric with super smoothness, softness, resilience, wrinkle resistance and washing durability. However, this kind of siloxane elastomer is very difficult to emulsify and easy to stick to the roll when used. Therefore, the development of high molecular weight polysiloxanes that are easy to emulsify, non stick to rollers and have excellent comprehensive properties, such as high molecular weight polysiloxane copolymers with hydrophilic segments embedded in the main chain structure, will also be an important direction for the development of silicone softeners

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