Molding resin and process for production thereof

Details Molding resin and process for production thereof Molding resin and process for production thereof

2007-01-30

2007-01-30

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From carboxylic acid or derivative thereof

C264S176100, C264S219000, C525S466000, C528S271000, C528S354000

Reexamination Certificate

active

10508954

ABSTRACT:
A molding resin formed from a block copolymer comprising polyhydroxycarboxylic acid structural units (I), and polyester structural units (II) derived from a dicarboxylic acid and a diol; wherein the weight ratio (I)/(II) between the polyhydroxycarboxylic acid structural units (I) and the polyester structural units (II) is within a range from 95/5 to 10/90; the resin has a microphase separated structure in which either the polyhydroxycarboxylic acid structural units (I) or the polyester structural units (II) forms domains within a matrix formed by the other structural units; the average domain size of the domains is within a range from 0.08 to 5.0 μm; and the weight average molecular weight of the molding resin is within a range from 10,000 to 400,000.

REFERENCES:
patent: 5403897 (1995-04-01), Ebato et al.
patent: 5686540 (1997-11-01), Kakizawa
patent: 6310112 (2001-10-01), Vo et al.
patent: 6756331 (2004-06-01), Kasemura et al.
patent: 0515203 (1993-08-01), None
patent: 0712880 (1996-05-01), None
patent: 0748846 (1997-02-01), None
patent: 2000-344877 (2000-12-01), None
patent: 2001-335623 (2001-12-01), None
patent: 2002-97350 (2002-04-01), None
patent: WO02/06400 (2002-01-01), None
European Search Report dated Feb. 9, 2005.
A.J. Domb; “Degradable Polymer Blends. I. Screening of Miscible Polymers”;Journal of Polymer Science: Part A: Polymer Chemistry; vol. 31; 1993; pp. 1973-1981./Discussed in the specification.
D.R. Paul, et al.; “Polymer Blends”;vol. 1; Academic Press; 1978; Title pages and Table of Contents (3 Sheets) and pp. 44-53./Discussed in the specification.
Copies of English version and Chinese version of Chinese Patent Office Action for corresponding Chinese patent application No. 03809476.2, dated Feb. 24, 2006, (Citing the reference AF).

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