38results about How to "Prevent molten dripping" patented technology

The present invention relates to a flame retardant alkyl dimethoxyphosphine heterocyclic methyl silicate compound and a preparation method thereof. The structure of the compound is shown in the following formula: where R=methyl, ethyl, propyl or butyl base. The preparation method is: under nitrogen protection, control the molar ratio of 4-ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane to alkyltrimethoxysilane to be 1:1 -1:1.5, under the action of catalyst, heat to reflux, at 100-180°C, reflux and keep warm for 10-20h, after purification, get alkyl dimethoxyphosphine heterocyclic methyl silicate. The product of the invention is suitable as a flame retardant for materials such as polyester PBT, PET, polyurethane, unsaturated resin, epoxy resin, etc.; and the production process is simple, equipment investment is small, and industrial production is easy to realize.

The present invention relates to a kind of preparation method of flame retardant methylphenylmethoxy (phosphacyclomethoxy) silane compound, the structure of the compound is shown in the following formula: the preparation method is: under the protection of nitrogen, add an organic solvent, Then add 1-oxygen-1-methyl-4-ethyl-4-hydroxymethyl-2, 6-dioxa-1-phosphorinane and methylphenyldimethoxysilane to control its The molar ratio is 1:1-1:1.4, the temperature is raised to 100-140°C, the temperature at the top of the fractionation column is controlled not to be higher than 65°C, and the generated methanol is fractionated, and the fractionation reaction is 6-10h until the fractionated methanol reaches the theoretical amount. The reaction is stopped, and after purification treatment, methylphenylmethoxyl (phosphacyclomethoxyl) silane is obtained; the product of the present invention has high flame retardancy, good compatibility with macromolecules, and is suitable for use as polyvinyl chloride, polyurethane, Flame retardant for polyester, unsaturated resin, epoxy resin, furan resin, polyvinyl alcohol and other materials. The preparation process is simple, the equipment investment is small, the large-scale production is easy, and the application and development prospects are very good.

The invention relates to the technical field of paint, in particular to a preparation method of flame-retardant polyurea elastomer paint. The polyurea elastomer paint is prepared from a component A and a component B. The preparation method comprises the following steps: (1) dehydrated siloxane polyether glycol, diisocyanate and a diluent are mixed uniformly in a reaction kettle, and then subjectedto a reaction for 2-4 hours at 80-95 DEG C, and the component A is obtained; (2) dehydrated amino-terminated polyether and a dehydrated amine chain extender are uniformly mixed with organic aluminumhypophosphite, polytetrafluoroethylene, ammonium polyphosphate, dipentaerythritol and additives in a reaction kettle, stirring is performed at 60-120 DEG C for 1-2 h, and the component B is obtained.The polyurea elastic resin prepared from a flame retardant and polyurea resin by compounding has excellent flame retardancy and thermal stability.