Preparation Of Waterborne Foaming Flame-Retardant Coating Gum And Its Application

Now, the flame durability of additive flame retardant coating gum in the market is poor. In this paper, the reactive waterborne foaming flame retardant coating gum, which has execellent flame-retardancy and durability, was prepared by dimethyl allylphonate which has unsaturated double bond as the retardant monomer and acrylate monomer through emulsion polymerization in water, and keeping originally excellent propertities of polyacrylate. Besides, because of the air permeability and moisture permeability of conventional coating is poor, great amount of sudor couldn't discharge as the form of water vapor while we activity. In this paper, the foaming coating process was use to improve the air permeability and moisture permeability of fabric, and make it have good flexibility.1. The reactive waterborne foaming flame retardant coating gum was prepared by means of pre-emulsification technology, through emulsion polymerization in water, by dimethyl allylphosphonate and acrylate monomer, with ammonium persulfate as initiator, hydroxyethyl cellulose(HEC) as protective colloid, sodium bicarbonate as buffer, sodium dodecyl sulfate and iso-tridecanol polyoxyethylene ether as emulsifier.2. The configuration and properties of the reactive waterborne foaming flame retardant coating gum were characterized by FTIR, TG-DTA, SEM, particle size analysis and Zeta electric potential.3. The experimental results showed that when the ratio of soft monomer and hard monomer is 1.5:1～2:1,dosages of protective colloid, dimethyl allylphosphonate, emulsifier, initiator, buffer, acrylic acid and crosslinking agent was 1～2%, 15%, 5%, 0.3%～0.4%, 0.3～0.5%, 3% and 1.0～1.5% by weight of monomers, respectively, and reaction temperature is 85～90℃, reaction time is 4～6 hours, solid content of the waterborne foaming flame retardant coating gum is 50%, the reactive waterborne foaming flame retardant coating gum had good foaming power, adherence and stability, it could make bamboo pulp fiber have good air permeability and moisture permeability, good flame-retardancy and durability, soft handle and good elasticity.4. It can be seen from the comparative experiments that the flame-retardancy of the reactive waterborne foaming flame retardant coating gum and the additive waterborne foaming flame retardant coating gum, showed almost same. But the flame durability of reactive coating gum is best than that of additive coating gum, and the appearance of fabric finished by the coating gum added solid flame retardants is coarse; the appearance of fabric finished by the coating gum added liquid flame retardants had greasy feeling.