Abstract: A crosslinked polyethylene composition having excellent physical properties (e.g., a high stiffness, a high ESCR, and a high impact strength) and improved molding properties (e.g., an improved melt tension and an improved dye swell) is disclosed. This composition is obtained by lightly crosslinking and intimately melt blending a composition comprising high- and medium-density polyethylene (A) having a high molecular weight and high- and medium-density polyethylene B having a low molecular weight, wherein(i) the viscosity-average molecular weight of polyethylene (A) is 100,000 through 1,000,000, the viscosity-average molecular weight of polyethylene B is 1,000 through 100,000, and the ratio of the molecular weight of polyethylene (A) to that of polyethylene (B) is 2 through 100,(ii) the blending ratio of polyethylene (A) to polyethylene (B) is 5:95 through 80:20, and(iii) (MI).sub.1 is 0.01 through 3.5, the ratio of the expansion factor .alpha..sub.2 to .alpha..sub.1 (.alpha..sub.2 /.alpha..sub.1) is 1.

Abstract: 1,3,6-Tris(4,6-diamino-1,3,5-triazine-2-yl)hexane, and a flame retardant resin composition comprising (A) about 5 to about 100 parts by weight of 1,3,6-tris(4,6-diamino-1,3,5-triazine-2-yl)hexane and (B) 100 parts by weight of a thermosetting resin or a thermoplastic resin.