The present disclosure provides an efficient phosphorus-containing toughening reactive flame retardant and a preparation method thereof, and a flame-retardant thermosetting resin, and relates to the technical field of material flame retardancy. In the present disclosure, the reactive flame retardant includes phosphorus, and can improve a flame-retardant performance of the thermosetting resin; meanwhile, the flame retardant further includes reactive NH activated bonds that can participate in a curing reaction of the thermosetting resin, increasing a degree of cross-linking of the thermosetting resin to further improve tensile properties; in addition, the reactive flame retardant further includes a sacrificial bond structure to improve an impact performance of the thermosetting resin.

The present invention relates to a hot-meltable curable silicone composition for compression molding or laminating and a laminate provided with at least one layer comprising the composition, as well as a semiconductor device using these and a method of manufacturing the same. In accordance with the present invention, it is possible to efficiently manufacture a semiconductor device provided with a hemi-spheroidal lens- or dome-shaped seal. In the present invention, it is easy to control the shape of the seal, and the seal does not contain any bubbles. In the present invention, it is also easy to control the thickness of the coating layer of the semiconductor device apart from the seal.

An one-part polyurethane composition, including: A) 15-75 wt.-% of at least one isocyanate-functional polyurethane polymer; B) 5-30 wt.-% of at least one organic thixotropy agent; C) 2-25 wt.-% of at least one plasticizer having viscosity of less than 500 mPa s, measured at 0 C. with cone-plate viscosimeter, shear rate 10 s.sup.1, cone angle 1, spindle 25-2, and cone tip-plate distance of 0.05 mm; D) 0-15 wt.-% of at least one solvent; E) 0-50 wt.-% of at least one filler; F) at least one catalyst for curing of polyurethane compositions; wherein isocyanate-functional polyurethane polymer has NCO content in range of 0.8%-2.5% by weight and is obtained from reaction of methylene diphenyl diisocyanate (MDI) and polyol in NCO/OH ratio of at least 3/1 and subsequent removal of non-reacted MDI; and polyol has viscosity, measured according to ASTM D4878-15 at 25 C., of less than 2000 mPa s; and isocyanate-functional polyurethane polymer has remaining content of MDI of at most 0.5% by weight.

The present disclosure provides an efficient phosphorus-containing toughening reactive flame retardant and a preparation method thereof, and a flame-retardant thermosetting resin, and relates to the technical field of material flame retardancy. In the present disclosure, the reactive flame retardant includes phosphorus, and can improve a flame-retardant performance of the thermosetting resin; meanwhile, the flame retardant further includes reactive NH activated bonds that can participate in a curing reaction of the thermosetting resin, increasing a degree of cross-linking of the thermosetting resin to further improve tensile properties; in addition, the reactive flame retardant further includes a sacrificial bond structure to improve an impact performance of the thermosetting resin.