Amino silicone oil emulsion has been widely used in the […]
Amino silicone oil emulsion has been widely used in the textile industry. The silicone finishing agent used in the textile industry is mainly amino silicone oil emulsion. Of course, there are other silicone emulsions such as dimethyl silicone oil emulsion, hydrogen-containing silicone oil emulsion, and hydroxyl. Silicone oil emulsion and so on.
(1)pure cotton, wool, silk fabric, rayon, rayon, and blended fabrics are basically soft and smooth,and you can choose silicone oil, amino silicone crude oil series or ternary copolymer crude oil series;
(2) cashmere fabrics and polyester reduced-weight fabrics have a higher comprehensive hand than wool fabrics, mainly to improve their hydrophilicity, polyether modified silicone oil and hydrophilic amino silicone oil can be selected,
Amino silicone oil has four main parameters: ammonia value, viscosity, reactivity and particle size. These four parameters fundamentally reflect the quality of amino silicone oil, and will greatly affect the quality of the treated fabric. Such as handle, whiteness, shade, and ease of emulsification of silicone oil.
The various functions that amino silicone oil imparts to fabrics, such as softness, smoothness, and fullness, are mostly caused by the amino groups in the polymer. The amino content can be indicated by the ammonia value, which refers to the number of milliliters of hydrochloric acid of 1 equivalent concentration required to neutralize 1 g of amino silicone oil. Therefore, the ammonia value is directly proportional to the mole percentage of the amino content in the silicone oil. The higher the amino content, the higher the ammonia value, and the softer and smoother the fabric will feel. This is because the addition of amino functional groups greatly increases the affinity to the fabric, forming a more regular molecular arrangement, and then giving the fabric a soft and smooth feel. .
But the vivid hydrogen in the amino group is easy to oxidize to form a chromophore, resulting in yellowish or slightly yellowish fabric. In the case of the same amino group, obviously following the addition of the amino group content (or ammonia value), the probability of oxidation is added, and the yellowing is severe.
Following the addition of the ammonia value, the polar addition of amino silicone oil molecules provides favorable preconditions for the emulsification of amino silicone oil, which can be made into microemulsions. The selection of emulsifiers and the size and dispersion of the particle size in the emulsion are also consistent with ammonia. Value related.
"Viscosity" is related to polymer molecular weight and molecular weight dispersion. Generally speaking, the greater the viscosity, the greater the molecular weight of amino silicone oil, the better the film-forming properties on the surface of the fabric, the softer the hand, the better the smoothness, but the worse its permeability, especially for tightly twisted fabrics and fine denier For fabrics, it is difficult for amino silicone oil to penetrate into the fibers and affect the function of the fabric. Excessive viscosity will also make emulsion stability worse or difficult to make microemulsion. Generally, the product cannot be adjusted only by viscosity, but the function of the product is generally balanced by ammonia value and viscosity. Generally, a low ammonia value requires a high viscosity to balance the softness of the fabric.