Nucleating agents for polyhydroxyalkanoates

Details Nucleating agents for polyhydroxyalkanoates Nucleating agents for polyhydroxyalkanoates

2007-11-27

2007-11-27

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From carboxylic acid or derivative thereof

C264S176100, C264S212000, C264S239000, C264S291000, C264S330000, C264S464000, C524S081000, C524S086000, C524S186000, C524S233000, C525S437000, C525S450000, C525S540000

Reexamination Certificate

active

11224805

ABSTRACT:
The present invention provides a process for crystallizing a polymer having at least 20 mole percent of hydroxyalkanoate repeat units, comprising admixing the polymer and a compound of the formula R1—C(O)N(R2)2, R1—C(O)NH—(R3)—NHC(O)—R1, R1—NHC(O)NH—(R3)—NHC(O)NH—R1, R1—NHC(O)—R2, R1—NHC(O)—(R3)—C(O)NH—R1, R1—C(O)NH—(R3)—C(O)NH—R1, R1—NHC(O)NH—(R3)—C(O)NH—R1, R1—NHC(O)NH—(R3)—NHC(O)—R1, or a combination thereof, at a first temperature, which is from about 5° C. to about 15° C. above the melting point of the polymer; and cooling the polymer at a second temperature, which is from about the glass transition temperature of the polymer to about the melting point of the compound. The present invention also provides a composition comprising a polymer having at least about 20 mole percent of hydroxyalkanoate repeat units, and a compound of the formula R1—C(O)N(R2)2, R1—C(O)NH—(R3)—NHC(O)—R1, R1—NHC(O)NH—(R3)—NHC(O)NH—R1, R1—NHC(O)—R2, R1—NHC(O)—(R3)—C(O)NH—R1, R1—C(O)NH—(R3)—C(O)NH—R1, R1—NHC(O)NH—(R3)—C(O)NH—R1, R1—NHC(O)NH—(R3)—NHC(O)—R1, or a combination thereof.

REFERENCES:
patent: 4835203 (1989-05-01), Sieverding
patent: 5068274 (1991-11-01), Efner
patent: 5523342 (1996-06-01), Nagaoka et al.
patent: 5973100 (1999-10-01), Asrar et al.
patent: 6706942 (2004-03-01), Zhao et al.
patent: 2002/0002252 (2002-01-01), Obuchi et al.
patent: 2002/0128344 (2002-09-01), Fujihira et al.
patent: 2004/0157967 (2004-08-01), Ito
patent: 2004/0214983 (2004-10-01), Tobita et al.
patent: 0 467 368 (1992-01-01), None
patent: 06-299054 (1993-04-01), None
patent: 6-299054 (1994-10-01), None
patent: 07-188537 (1995-07-01), None
patent: 7-188537 (1995-07-01), None
patent: 08-027363 (1996-01-01), None
patent: 11-005849 (1999-01-01), None
patent: P2004-149692 (2004-05-01), None
International Search Report mailed Dec. 12, 2005, 5 pages.

Affiliated with

Also associated with

Rating

Nucleating agents for polyhydroxyalkanoates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nucleating agents for polyhydroxyalkanoates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nucleating agents for polyhydroxyalkanoates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3819665