Thermoplastic polymer composition

Details Thermoplastic polymer composition Thermoplastic polymer composition

2009-03-31

2010-10-26

Szekely, Peter (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S387000

Reexamination Certificate

active

07820746

ABSTRACT:
A thermoplastic polymer composition having excellent resistance to heat discoloration has been desired. There is provided a thermoplastic polymer composition characterized by comprising a thermoplastic polymer, phosphites represented by the formula (I), and at least one kind of erythritols selected from the group consisting of pentaerythritol, dipentaerythritol and tripentaerythritol:wherein R1, R2, R4and R5each independently denotes a hydrogen atom, an alkyl group or the like, and R3denotes a hydrogen atom or an alkyl group; X denotes a single bond, a sulfur atom or a —CHR6group (R6denotes a hydrogen atom, an alkyl group or a cycloalkyl group); A denotes an alkylene group or a *—COR7group (R7denotes a single bond or an alkylene group, and * denotes a bonding hand on the side of oxygen), and one of Y and Z denotes a hydroxyl group or the like, and the other one of Y and Z denotes a hydrogen atom or an alkyl group).

REFERENCES:
patent: 0 823 435 (1998-02-01), None
patent: 9-67474 (1997-03-01), None
patent: 10-273494 (1998-10-01), None

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