Process for producing porous spherical polyamide particle

Details Process for producing porous spherical polyamide particle Process for producing porous spherical polyamide particle

2006-02-02

2010-06-29

Zemel, Irina S (Department: 1796)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S061000, C521S064000, C521S183000, C521S184000, C521S189000

Reexamination Certificate

active

07745504

ABSTRACT:
Porous spherical particles of polyamide 11 or polyamide 12 can be produced by an industrially advantageous process which comprises the steps of mixing a polyamide solution of polyamide 11 or polyamide 12 dissolved in a phenol compound and a low molecular weight aliphatic alcohol which is a poor solvent for the polyamides but is well compatible with the phenol compound in the presence of a high molecular weight alkylene glycol to prepare a mixture solution having an initial viscosity of 10 mPa·s or more, and allowing the mixture solution to stand, to precipitate polyamide particles.

REFERENCES:
patent: 2000-136249 (2000-05-01), None
patent: 2002080629 (2002-03-01), None
patent: 2002-143680 (2002-05-01), None
International Preliminary Report on Patentability and Written Opinion of the International Searching Authority mailed Aug. 16, 2007, 5 pages, for International Application No. PCT/JP2006/301800, Full.
International Search Report mailed Feb. 28, 2006 for International Application No. PCT/JP2006/301800.

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