1. The performance of hydrophilic amino silicone oil
At present, the most widely used fabric finishing agents on the market are mainly amino silicone oil emulsions or microemulsions. However, these finishing agents generally have the following shortcomings: easy to demulsify, bleach oil, sticky sticks, and produce difficult-to-remove silicone oil stains on the processed fabric. These finishing agents have poor compatibility and are difficult to use at the same time with other auxiliaries (especially auxiliaries with different charges); easy to yellow and have large color changes; the finished fabric is hydrophobic and does not absorb sweat; some finished fabrics are sewing It is easy to produce pinholes or even tear the fabric; it has a strong greasy feeling and does not feel dry.
The above deficiencies limit the application of amino silicone oil on high-end fabrics (natural fabrics such as cashmere, wool, cotton, etc.). The hydrophilic amino silicone oil can solve the above problems. However, it is technically difficult to graft hydrophilic groups on hydrophobic amino silicone oil molecules, which is difficult to achieve by using general silicone oil synthesis methods. Hongtu adopts a unique formula design and a special process route. The polysiloxane is modified by polyether, epoxy, amino and other multiple modifications, and then the acylation reaction is carried out to obtain the acylated amino polysiloxane with excellent hydrophilicity. Ether silicone oil.
2. Synthesis of hydrophilic amino silicone oil
Put the measured octamethylcyclotetrasiloxane, hydrogen-containing silicone oil, epoxy-containing monomers, strong acid catalysts, telomers and crosslinkers into the reactor in sequence, keep the reaction temperature at 70°C, and start Ring copolymerization to obtain oligomers. Then the oligomer and unsaturated polyether are grafted and copolymerized under the action of weak acid to generate epoxy-containing polyether silicone oil. Then it is aminated with a secondary amine to obtain an amino-modified polyether silicone oil; acetic anhydride is added to carry out an acylation reaction to obtain a hydrophilic silicone oil.
3. Emulsification of amino silicone oil
Put the measured hydrophilic amino silicone oil into the reaction kettle, then start stirring, and add the measured glacial acetic acid and deionized water dropwise to obtain the amino silicone oil emulsion by self-emulsification.