Brevet : EP0970986 - POUDRE GRANULAIRE DE POLYTETRAFLUOROETHYLENE MODIFIE
Titre
POUDRE GRANULAIRE DE POLYTETRAFLUOROETHYLENE MODIFIE
N° et date de publication de la demande
EP0970986 - 12/01/2000
Type de la demande
A1
N° et date de dépôt
EP98905697.3 - 26/02/1998
N° et date de priorité
JP8449097 - 17/03/1997
Classification CIB
Classification CPC
B01J 20/18 ; B01J 20/2805 ; C08J 3/12 ; C08J2327/18 ; C08J 3/12 ; C08J 3/12 ; B01J 20/18 ; C08J2327/18 ; B01J 20/2805
Famille de brevets
DE69823492T2 ; KR20000075540A ; CN1249767A ; US6300408B1 ; JPH10259252A ; EP0970986A1 ; WO9841568A1 ; RU2182159C2
Abrégé
Résumé dans la langue de publication To provide a modified PTFE granular powder which has a large apparent density, a small average particle size, a narrow particle size distribution, an electrostatic charge substantially approximate to zero, a small angle of repose and being excellent in powder characteristics, particularly particle stability. The modified PTFE powder is granulated with stirring in water under coexistence of an organic liquid which forms liquid-liquid interface with water and a nonionic surfactant of segmented polyalkylene glycols which has a hydrophobic segment and a hydrophilic segment. A molded article obtained from the granular powder is excellent in tensile strength and elongation and has a small surface roughness, a large break down voltage and a large whiteness (Z value).
INTERVENANTS
Déposant
DAIKIN IND LTD (DAIKIN INDUSTRIES, LIMITED) - JP
Titulaire
Daikin Industries, Limited
Inventeur
ASANO MICHIO (ASANO, MICHIO) - JP
TSUJI MASAYUKI (TSUJI, MASAYUKI) - JP
Mandataire
CABINET BEAU DE LOMENIE - 158 RUE DE L UNIVERSITE - 75340 PARIS CEDEX 07 - FR - N° Siren : 775671076
STATUT EN FRANCE : Dossier déchu définitivement
Délivrance
28/04/2004
Remise de traduction du brevet
21/01/2005 (BOPI 2005-03)
Date de constatation de déchéance
-
30/10/2009 (BOPI 2009-48)
Dernière annuité payée
08/02/2008
Quantième- N° de l'annuité payée
11