Synthesis And Application Of Double Component Waterproof And Soft Finishing Agent

Organic fluorine polymer refers to a compound with special structure that the hydrogen atoms in the polymer’s long carbon chain are totally or partly replaced by fluorine atoms. It can gift the fabric excellent waterproof performance with its extremely low surface energy characteristic. So organic fluorine polymer is becoming more and more widely used in the aspects such as textile, medicine, military materials etc. While one of organic fluorine emulsion finishing agents which containing silicon is paid much attention and becomes the mainstream of the auxiliary agent for waterproof finishing of fabric because of its giving the fabric soft, slippery, elastic feel, excellent waterproof performance and environmentally-friendly, economic processing technology. The performance characteristics of organic silicon and organic fluorine emulsions are combined together and the needed amino silicone oil emulsion and fluorinated polyacrylate emulsion are successively designed and synthesized by emulsion after bulk polymerization and emulsion polymerization respectively with cationic/non-ionic composite surfactant as emulsifier and finally, a new kind of stability fluorine and silicon composite emulsion which has good softening and waterproofing function is successfully prepared through a simple distribution process in this paper. So the fabric by only one bath process can realize the function both of waterproof and soft becomes true. The fabric’s waterproof property will not be affected when the fabric is softening.First, a series of side amino modified polysiloxanes were prepared successfully under the action of the catalyst (four methyl hydroxide) with silane coupling agent (3-ammonia methyl group two methyl group silane) and four methyl ring eight silicone (D4) as raw materials, hexamethyldisiloxane as end capping agent in this study. We confirmed that the structure of the synthesized amino silicone oil conforms to the envisaged structure through infrared spectrum (IR) and nuclear magnetic resonance hydrogen spectrum (1H-NMR). The synthetic process conditions such as the dosage of 3-propyl methyl dimethoxy silane, four methyl hydroxide and hexamethyldisiloxane, reaction time and reaction temperature etc were researched in detail and a series of amino silicone oils with different ammonia value and viscosity were synthesized at different synthetic process conditions. The synthesized amino silicone oils were finally emulsified to the needed amino silicone oil emulsions by the emulsifier which was based on 1831 and O-20 quality ratio of 8:12 cationic/non-ionic composite surfactant. Through experiment, we believe that the difference of emulsifying effect of amino silicone oil with different ammonia value and viscosity is notable. Generally speaking, the amino silicone oil with high ammonia value and low viscosity is easy to emulsification, while the ammonia value is low, and the amino silicone oil with high viscosity is difficult to emulsification.Second, we prepared a fluorine-containing polyacrylate emulsion with epoxy group by emulsion copolymerized 2-(n-ethylperfluorooctanesulfonamido) ethyl methacrylate (FA),18 acrylate (SA) and methyl glycidyl ester of acrylic (GMA) together with water soluble ammonium sulfate (APS) as the initiator and 1831 and O-20 quality ratio of 8:12 cationic/non-ionic composite surfactant as the emulsifier which was the same to the synthesized amino oil emulsion in this paper. The synthesized fluorine-containing polyacrylate emulsion’s structure was characterized by IR spectrum and the analysis and test of the epoxy value of the emulsion. The morphology, particle size, particle size distribution and Zeta potential of the synthesized acrylate latex were also analyzed by TEM and laser nano particle size analyzer. By studying the influence of the polymerization process conditions such as the monomer ratio, dosage of initiator, polymerization temperature, ultrasonic time, polymerization time and the kind and amount of emulsifier etc on the emulsion polymerization, we obtained an optical synthesis process:m(FA):m(SA):m(GMA)=5:5:0.5, the dosage of APS was 1% of the mass of monomer, the amount of molecular weight regulator dodecyl mercaptan was 0.35% of the mass of monomer, the emulsifier was 1831 and O-20 quality ratio of 8:12 cationic/non-ionic composite surfactant and the amount was 20% of the monomer mass, ultrasonic time was 30min, and the polymerization time was 3h.Finally, based on the above research, we successfully prepared a blue light stable cationic /non-ionic fluorine silicon composite emulsion through series experiments of compounding the synthesized amino silicone oil emulsion with fluorinated polyacrylate emulsion. The average particle size of the prepared emulsion was tested as 112.2nm and the Zeta potential was +52.3mV. Through the application performance study on the self-made fluorine silicon composite emulsion in polyester pongee fabric, we concluded that the prepared fluorine and silicon compound emulsion could not only do not effect the waterproof performance of fluorine repellent, but also improve the fabric’s handle. After treating, the water contact angle of the polyester fabric to water could reach 139.4+/-1.1°.So the application study results showed that the prepared fluorine silicone composite latex not only had good softness effect but also had excellent waterproof finishing effect on fabric. So the purpose of the paper research was reached. But study also found that the large dose of fluoride and silicone composite latex could cause the fabric feel slightly hard.Generally speaking, the research of this paper provides a new way for developing new waterproof softening finishing agent.