초록 ▼

Blends of chlorinated polyvinyl chloride and chlorinated polyethylene and methods for preparing extruded profiles such as a window spacer, a glazing bead, a window lineal, and a track for lighting, having smooth surface characteristics are disclosed. The blends comprise 100 weight parts CPVC contain

Blends of chlorinated polyvinyl chloride and chlorinated polyethylene and methods for preparing extruded profiles such as a window spacer, a glazing bead, a window lineal, and a track for lighting, having smooth surface characteristics are disclosed. The blends comprise 100 weight parts CPVC containing from 62% to 72% chlorine, preferably 65% to 71% chlorine and from 10 to 30 weight parts, preferably 15 to 25 parts of chlorinated polyethylene containing from 25 to 45% chlorine and extruding the blend. The preferred embodiments of the invention are further defined by a particular combination for the chlorine content of CPVC, the real weight average molecular weight of CPE (Mw) and polydispersity (Mw/Mn), defined as the ratio of the weight average to number average molecular weight, and extrusion shear rate.

대표청구항 ▼

An extruded profile having smooth surface appearance made from a chlorinated polyvinyl chloride blend, said blend comprising 100 weight parts of chlorinated polyvinyl chloride containing from 62% to 72% chlorine and 10 to 30 weight parts chlorinated polyethylene and a stabilizer comprising a metal s

An extruded profile having smooth surface appearance made from a chlorinated polyvinyl chloride blend, said blend comprising 100 weight parts of chlorinated polyvinyl chloride containing from 62% to 72% chlorine and 10 to 30 weight parts chlorinated polyethylene and a stabilizer comprising a metal salt of phosphoric acid, the blend comprising any one of the following: (a) chlorinated polyvinyl chloride containing 62% to 64% chlorine, said chlorinated polyethylene having a real weight average molecular weight of from 90,000 to 130,000 and a polydispersity of from 4 to 8, said blend (a) extruded in a shear range of from 100 S-1 to 600 S-1; (b) chlorinated polyvinyl chloride containing 64.1% to 66% chlorine, said chlorinated polyethylene having a real weight average molecular weight of from 90,000 to 130,000 and a polydispersity of from 4 to 8 said blend (b) extruded in a shear range of from 350 S-1 to 4,000 S-1; (c) said chlorinated polyvinyl chloride containing 64.1% to 66% chlorine, said chlorinated polyethylene having a chlorine content of from 38% to 44% chlorine, a real weight average molecular weight of from 170,000 to 220,00 and a polydispersity of from 4 to 8, said blend (c) extruded in a shear range of from 400 S-1 to 500 S-1; (d) said chlorinated polyvinyl chloride containing 66.1% to 69% chlorine, said chlorinated polyethylene having a real weight average molecular weight of from 90,000 to 130,00 and a polydispersity of from 4-8, said blend (e) extruded in a shear range of from 300 S-1 to 600 S-1; (e) said chlorinated polyvinyl chloride containing 66.1% to 69% chlorine, said chlorinated polyethylene having a real weight average molecular weight of from 150,000 to 200,000 and a polydispersity of from 3-8, said blend (f) extruded in a shear range of from 400 S-1 to 1,300 S-1; (f) said chlorinated polyvinyl chloride containing 66.1% to 69% chlorine, said chlorinated polyethylene having a real weight average molecular weight of from 290,000 to 330,000 and a polydispersity of from 8-14, said blend (g) extruded in a shear range of from 500 S-1 to 650 S-1; (g) said chlorinated polyvinyl chloride containing from 69.1% to 72% chlorine, said chlorinated polyethylene having a real weight average molecular weight of from 90,000 to 130,000 and a polydispersity of from 4-8, said blend (h) extruded in a shear range of from 350 S-1 to 3,500 S-1; (h) said chlorinated polyvinyl chloride containing from 69.1 to 72% chlorine, said chlorinated polyethylene having a real weight average molecular weight of from 150,000 to 200,000 and a polydispersity of from 3-8, said blend (i) extruded in a shear range of from 300 S-1 to 1,000 S-1; or (i) said chlorinated polyvinyl chloride containing from 69.1% to 72% chlorine, said chlorinated polyethylene having a real weight average molecular weight of from 290,000 to 330,000 and a polydispersity of from 8-14, said blend (i) extruded in a shear range of from 350 S-1 to 500 S-1.