Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1998-12-01
2000-10-31
Woodward, Ana
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525133, 525166, 525179, 525185, 525189, 525239, 525240, 525507, 525513, 525514, 525515, 525525, 525527, 428 357, C08F 830
Patent
active
061404209
ABSTRACT:
Melt processible thermoplastic compositions and method for making them are described, these compositions comprising a thermoplastic polymer resin matrix selected from the group consisting of thermoplastic polyurethanes, polyvinyl chlorides, styrenics, engineering thermoplastics, and polyolefins, at least about 25 percent (by weight based on the total composition) of an elastomeric impact modifier dispersed as discrete particles in the thermoplastic matrix (a); and at least about 10 percent (by weight based on the total composition) of at least one homogeneous linear or substantially linear ethylene polymer dispersed as discrete particles in at least the impact modifier (b), the ethylene polymer having a molecular weight distribution less than 3.5 and a density of at least 0.04 g/cm.sup.3 higher than the density of the impact modifier component (b), wherein the elastic modulus of the thermoplastic component (a) is at least 200 times greater than the elastic modulus of the impact modifier component (b). These thermoplastic compositions have improved processability. Processes for fabricating articles from them are described. The articles made with these compositions have improved properties such as low temperature impact strength, improved percent elongation to break, greater stiffness, and improved weld line strength, making them useful for applications requiring both strength and flexibility in low temperature environments, such as automotive components and facia.
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Rader, C.P., "E
Chum Pak-Wing Steve
Meiske Larry A.
Sehanobish Kalyan
Wu Shaofu
The Dow Chemical Company
Woodward Ana
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