Armando A Sardanopoli

US Patent:

20060189754, Aug 24, 2006

Filed:

Feb 18, 2005

Appl. No.:

11/060954

Inventors:

Toprak Serhatkulu - Grosse Ile MI, US
Armando Sardanopoli - Grosse Ile MI, US

International Classification:

C08L 51/00

US Classification:

525064000

Abstract:

A composition includes thermoplastic polyurethane (TPU) and methyl methacrylate-acrylonitrile-butadiene-styrene (MABS) graft copolymer. The TPU is present in an amount of greater than 40 parts by weight, and the MABS graft copolymer is present in an amount of from 1 to 50 parts by weight, both based on the total weight of the composition. The composition has a light transmission value of at least 40%, as measured in accordance with ASTM D-1003, and a coefficient of friction of less than 1.5. The composition including the TPU and the MABS graft copolymer in the above weight ranges has good transparency, elongation, tensile strength, tear strength, elasticity, chemical resistance, and abrasion resistance that are all associated with the TPU. The presence of the MABS graft copolymer in the composition lowers the coefficient of friction of the TPU and while still substantially maintaining the light transmission value of the TPU, making the composition useful in many applications, especially in the pipeline repair industry.

US Patent:

62583107, Jul 10, 2001

Filed:

Mar 18, 1999

Appl. No.:

9/271528

Inventors:

Armando Sardanopoli - Grosse Ile MI
J. Richard Stonehouse - Berkley MI

Assignee:

BASF Corporation - Mt. Olive NJ

International Classification:

B29C 4700

US Classification:

26421123

Abstract:

The invention comprises modifying a preformed thermoplastic polyurethane product made from the reaction of a difunctional isocyanate with a polyester or a polyether diol, along with a monomeric, low molecular weight diol as a chain extender. The preformed thermoplastic polyurethane product is then cross-linked by the addition of an isocyanate prepolymer made from the reaction of an excess of a polyisocyanate with a polyester or polyether polyol. The invention further comprises a process for forming the thermoplastic polyurethane product described above utilizing a single or twin screw extruder to mix and react the ingredients.