Application of silicone oil in textile dyeing and finishing-Iota

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News > Dynamic industry > Application of silicone oil in textile dyeing and finishing

Application of silicone oil in textile dyeing and finishing

Silicone oil usually refers to the room temperature to maintain the liquid state linear polysiloxane products is generally colorless (or light yellow), tasteless, non-toxic, easy volatile liquid. Their molecular weight is not high, at room temperature for the flow state, so it is usually called silicone oil. It is generally not used, but is made of special formula, often used as auxiliary materials to produce a certain effect. Generally speaking, there are 3 basic forms of silicone oil on the market: pure silicone oil, solution, emulsion.
First, pure silicone oil has very strong stability, heat resistance, anti freezing, storage is good, with high flash point and ignition point is high, storage and transportation problems rarely;
Second, in fact, often need to dilute the oil solution, sometimes hope to join the activity in the solution of auxiliary agent (catalyst, crosslinking agent, etc.) for convenient storage and use, according to the needs of the aliphatic, aromatic and chlorinated hydrocarbon as solvent, under special circumstances to adopt other kinds of solvent, general polysiloxane solution, concentration only to 35%. Otherwise, the viscosity is too high;
Third, a great part of silicone oil or silicone oil products are made of latex, which is a low cost, not easy to burn. Different type and solvent, all silicone emulsion is "oil in water" type heterogeneous system and its external closed phase aqueous, silicone oil with very fine droplets dispersed in the aqueous phase, it is easy to dilute with water to the desired concentration in order to apply, the stability of the emulsion can through as far as possible, the stability effect of the micro droplets become fine and emulsifier to achieve.
Silicone oil in the textile and apparel industry can be used as fabric softening agent, lubricant, waterproof agent, finishing agent, etc.. In order to meet the high demand for textiles, chemical products manufacturer also in the continuous development and various functional additives such as waterproofing agent, flame retardant, antistatic agent, fixing agent to use the same bath, feel good silicone oil. In addition, in order to improve the properties of the fabrics, and with dyeing in one bath of silicone products and have a cool sense of cotton with silicone oil, can improve the fabric handle silicone products, and provides the textile material excellent increase deep effect, storage stability, does not affect the color fastness and handle silicone class deepening agent etc.. In addition to in the textile as an additive to achieve functional textiles, silicone products will also be applied to other areas of textile, such as silicone and polyurethane combination to form coating on the fabric; silicone and acrylate polymerizes to form a fabric printing; silicone and fluoride machine are combined to form a fabric surface waterproof coating etc..
Silicone oil according to its processing conditions can be divided into a product and two products.
The former refers to the processing of silicone oil products, including hydroxyl silicone, silicone oil, silicone oil and non reactive modification of silicone oil 4 categories. In these 4 categories, the former is used to say the first two is linear silicone oil, the two class is called modified silicone oil.
Secondary silicone products refers to the silicone oil as raw material, with thickening agent, surface active agent, solvent and additives, grease, emulsion and solution and the specific processing into products, such as silicone grease, silicone cream, fire foam agent, release agent and isolating agent etc..
Silicone softening agent in the domestic production and application can be said to have experienced 4 generations:
Hydroxyl terminated the high molecular weight silicone emulsion (hydroxy emulsion) is the first generation, composed of eight methyl ring four siloxane (D4), water and emulsifier, catalyst and other raw materials in certain conditions emulsion polymerization and;
The second generation is a polyether modified silicone oil, which is made by the hydrogen addition reaction of polyethylene glycol, propylene glycol, propylene glycol, polyethylene glycol, etc.;
The third generation is with active group (amino, epoxy) of polysiloxane emulsion polymerization method and hydroxy emulsion is basically the same, different is a certain amount of silane coupling agent is added in the raw material. These amino, epoxy functional groups introduced, greatly improve the finished fabric of soft, smooth, elastic and finishing the durability of the effects, shortcomings is in use in the process of demulsification, oil bleaching phenomenon. This class with active groups of polysiloxane emulsion due to the use of ionic surface active agent, emulsion showed strong cation or anion, and other additive compound selective strong, poor compatibility.
Was in the fourth generation of amino silicone oil as the representative of the modified silicone oil, is currently on the market the most representative of organosilicon softening agent varieties, we usually take the aminoethyl aminopropyl poly dimethyl siloxane is called the standard amino silicone oil, and the other ammonia substituted polysiloxane called modified amino silicone oil. Interaction of amino silicone oil due to the strong polar amino, and fiber surface hydroxyl, carboxyl, and fiber formed very strong orientation, adsorption, decrease the coefficient of friction between the fibers, which means that the fabric grip in the hands, with a small force can be make between the fibers began to slide, so feel soft. In recent years, organic modified silicone oil has been developed rapidly, and many organic modified silicone oil with special properties have been developed.

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