Polylactic acid composition containing modifier

Details Polylactic acid composition containing modifier Polylactic acid composition containing modifier

2007-05-29

2007-05-29

Mullis, Jeffrey (Department: 1711)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S09200D, C525S09200D, C525S09200D

Reexamination Certificate

active

10507685

ABSTRACT:
A modifier for a polylactic acid comprising a block polymer (C) having a polymer block (A) satisfying relationship (1):in-line-formulae description="In-line Formulae" end="lead"?7.80≦σ/ρ<8.54in-line-formulae description="In-line Formulae" end="tail"?wherein σ represents a solubility parameter value of a polymer block; and ρ represents a density value of a polymer block,and a polymer block (B) satisfying relationship (2):in-line-formulae description="In-line Formulae" end="lead"?8.54≦σ/ρ<9.20in-line-formulae description="In-line Formulae" end="tail"?wherein σ and ρ have the same meanings as described above,wherein each of the aforementioned polymer block (A) and the aforementioned polymer block (B) is independently a polymer block selected from the group consisting of a polyester block, a polyether block, and a polyhydroxycarboxylic acid block, and said block polymer (C) has a glass transition temperature of 0° C. or lower, can enhance impact resistance, flexibility, and tensile strain, while biodegradability of the polylactic acids and thermal resistance are maintained, and in addition, is free from bleed-out from the moldings formed from a polylactic acid composition.

REFERENCES:
patent: 5202413 (1993-04-01), Spinu
patent: 5286501 (1994-02-01), Song et al.
patent: 5502158 (1996-03-01), Sinclair et al.
patent: 5824751 (1998-10-01), Hori et al.
patent: 6211249 (2001-04-01), Cohn et al.
patent: 6303677 (2001-10-01), Warzelhan et al.
patent: 6579952 (2003-06-01), Niki et al.
patent: 2002/0198332 (2002-12-01), Kasemura et al.
patent: 0 723 983 (1996-07-01), None
patent: 8-501584 (1996-02-01), None
patent: 8-198957 (1996-08-01), None
patent: 8-199052 (1996-08-01), None
patent: 08-231838 (1996-09-01), None
patent: 08-253665 (1996-10-01), None
patent: 8-283557 (1996-10-01), None
patent: 9-137047 (1997-05-01), None
patent: 10-36651 (1998-02-01), None
patent: 10-316846 (1998-12-01), None
Lefevre et al; “Synthesis and thermal characterization of crystallizable poly(caprolactone)/poly(hexamethylene terephthalate) block copolymer;” Polymer 42 (2001) 8769-8777.
Lefebvre et al “Bis(4-monosubstituted-5(4H)oxazolinones) as coupling agents for block copolymer synthesis: reaction with hydroxy-terminated oligomers;” Macromol. Chem. Phys. 199, 2747-2753 (1998).
Tian et al; “Macromolecular Engineering of Polylactones and Polylactides, 23. Synthesis and Characterization of Biodegradable and Biocompatible Homopolymers and Block Copolymers Based on 1,4,8-Trioxal[4,6]spiro-9-undecanone;” Macromolecules 30, (1997); 1947-1954.
Ferruti et al; “Synthesis and properties of novel block copolymers containing poly(lactic-glycolic acid) and poly(ethyleneglycol) segments;” Biomaterials, vol. 16, No. 18 (1995) 1423-1428.
Tsai et al; “Block copolyetheresters, etc.”; Polymer Bulletin 35, No. 6 (Dec. 1995); 743-749.
Lofgren et al; “Synthesis and Characterization of Biodegradable Homopolymers and Block Copolymers Based on 1,5-Dioxepan-2-one;” Macromolecules, vol. 27 No. 20 (1994) 5556-5562.
Grijma et al; “Rubber Toughening of Poly(Lactide) by Blending and Block Copolymerization;” Polymer Eng. And Science; vol. 34, No. 22 (Nov. 1994) 1674-1684.
Sangen et al; “A New Synthetic Pathway of Segmented Tri-Block Copolyether;” J. Polymer Science; Part A: Polymer Chemistry Edition; 30, No. 6 (May 1992); 1171-1175.
European Search Report dated Jun. 16, 2005.
Van Krevelen; “Properties of polymer,” D19 Elsevier (1990), Amsterdam; pp. 214.
European Office Action dated Apr. 20, 2006.
Van Krevelen, D. W., “Properties of Polymer”, 3rdedition, 1990, Elsevier:Amsterdam, pp. 200-221.
Krause, S., “Polymer-Polymer Compatibility”, in “Polymer Blends”, vol. 1, Paul, D.R. and Newman, S., editors, Academic Press; New York, 1978, pp. 45-47.

Affiliated with

Also associated with

Rating

Polylactic acid composition containing modifier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polylactic acid composition containing modifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polylactic acid composition containing modifier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3753656