3results about How to "Lower curing reaction temperature" patented technology

The invention discloses flame-retardant modified benzoxazine resin, and a preparation method of the flame-retardant modified benzoxazine resin comprises the following steps: blending a benzoxazine monomer with dihydric phenol which is used as a flame retardant and contains a boron acetal structure, and then curing the blend to obtain the flame-retardant modified benzoxazine resin, the preparation method of the dihydric phenol containing the boron acetal structure comprises the following steps: adding hydroxyphenylboronic acid, pentaerythritol and a water-carrying agent into a reaction container, adding an organic solvent, carrying out a stirring reaction at 80-100 DEG C for 4-8 h, and after the reaction is finished, carrying out rotary evaporation and drying to obtain the dihydric phenol, the water-carrying agent is any one of petroleum ether, benzene, cyclohexane and chloroform. The blending method of the benzoxazine monomer and the dihydric phenol is solution blending or melt blending, and the curing method is thermocuring or catalytic curing. The boron acetal structure in the used flame retardant can generate a condensed phase flame retardant and gas phase flame retardant synergistic effect, so that the flame retardant property of the benzoxazine resin reaches UL94V-0 level, and the boron acetal structure can promote char formation and improve the carbon residue rate of the benzoxazine resin.

The invention relates to a medium-temperature curing epoxy resin glue solution, a preparation method thereof and an application of the medium-temperature curing epoxy resin glue solution in a fiber reinforced plastic pressure-bearing pipeline. The invention belongs to the field of epoxy resin. The problems of high curing temperature, long curing time, relatively high energy consumption, relatively low efficiency and the like during curing of the prepared fiber reinforced plastic pressure-bearing pipeline are solved. The medium-temperature curing epoxy resin glue solution is prepared from bisphenol A epoxy resin, acid anhydride, a quaternary ammonium salt compound, an amine compound, a wetting agent, a toughening agent, an anti-aging agent and a thickening agent according to a reasonable proportion, and a pressure-bearing pipeline prepared from the medium-temperature curing epoxy resin glue solution and fiber yarns has excellent mechanical properties and chemical resistance; in addition, the curing temperature is low, the curing time is short, the production period can be greatly shortened, the production efficiency is improved, remarkable social benefits and economic benefits are achieved, and industrial production is facilitated.

This application belongs to the field of grouting reinforcement technology for coal mine working faces, specifically relating to a grouting reinforcement material and its preparation method. The grouting reinforcement material comprises component A and component B in a mass ratio of (0.8-1.2):1; component A comprises the following raw materials in parts by weight: 45-55 parts polyether polyol, 0.4-0.8 parts catalyst, 1-2 parts curing agent, and 9-10 parts flame retardant; component B comprises the following raw materials in parts by weight: 30-40 parts isocyanate, 30-40 parts flame-retardant epoxy resin, and 3-5 parts plasticizer. The beneficial effects of this application include: the grouting reinforcement material has good flame retardant and mechanical properties, and a low curing reaction temperature; while ensuring performance, it reduces the use of toxic materials and lowers production costs, opening up a wider space for the practical application of grouting materials.