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1. (WO1992010282) A METHOD OF PRODUCING MONOMERIC PHASES IN THE FORM OF MICROSPHERES DISPERSED HOMOGENEOUSLY AND SUSPENDED STABLY IN CONTINUOUS PHASES CONSTITUTED BY POLYSACCHARIDE GELS, THE POLYMERISATION THEREOF, AND USE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010282 International Application No.: PCT/EP1991/002276
Publication Date: 25.06.1992 International Filing Date: 02.12.1991
Chapter 2 Demand Filed: 01.07.1992
IPC:
C08F 2/16 (2006.01) ,C08F 2/20 (2006.01) ,C08L 5/12 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
2
Processes of polymerisation
12
Polymerisation in non-solvents
16
Aqueous medium
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
2
Processes of polymerisation
12
Polymerisation in non-solvents
16
Aqueous medium
18
Suspension polymerisation
20
with the aid of macromolecular dispersing agents
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
5
Compositions of polysaccharides or of their derivatives not provided for in group C08L1/ or C08L3/142
12
Agar-agar; Derivatives thereof
Applicants:
S.E.I.P.I. SOCIETÀ ESPORTAZIONE IMPORTAZIONE PRODOTTI INDUSTRIALI S.P.A. [IT/IT]; Via Garibaldi, 69 I-20071 Casalpusterlengo, IT (AllExceptUS)
GIUSTI, Paolo [IT/IT]; IT (UsOnly)
MANTILLI, Marco [IT/IT]; IT (UsOnly)
PALLA, Maurizio [IT/IT]; IT (UsOnly)
PIZZIRANI, Giovanna [IT/IT]; IT (UsOnly)
Inventors:
GIUSTI, Paolo; IT
MANTILLI, Marco; IT
PALLA, Maurizio; IT
PIZZIRANI, Giovanna; IT
Agent:
RAMBELLI, Paolo ; Jacobacci-Casetta & Perani S.p.A. Via Alfieri, 17 I-10121 Torino, IT
Priority Data:
67967 A/9005.12.1990IT
Title (EN) A METHOD OF PRODUCING MONOMERIC PHASES IN THE FORM OF MICROSPHERES DISPERSED HOMOGENEOUSLY AND SUSPENDED STABLY IN CONTINUOUS PHASES CONSTITUTED BY POLYSACCHARIDE GELS, THE POLYMERISATION THEREOF, AND USE
(FR) PROCEDE DE PRODUCTION DE PHASES MONOMERES SOUS FORME DE MICROSPHERES DISPERSEES DE MANIERE HOMOGENE ET EN SUSPENSION STABLE DANS LES PHASES CONTINUES CONSTITUEES DE GELS POLYSACCHARIDIQUES, LEUR POLYMERISATION, ET LEURS APPLICATIONS
Abstract:
(EN) The invention enables polymerisations to be carried out in suspension in order to produce microspheres of polymeric material and is concerned with the following, which is a subject of the claims: the reduction of the monomeric phase into microspheres, involving: a continuous phase (A) constituted by at least one polysaccharide dissolved in hot distilled water, a monomeric phase (B), constituted by at least one monomer and the catalyst, an unstable dispersion (C) produced by the mechanical mixing of the preceding phases, and a stable dispersion (D) produced by reducing the temperature of the unstable dispersion until the continuous phase gels, and stopping the stirring; the production of the polymeric microspheres (E) by discontinuous or continuous processes involving: the raising and control of the temperature of the stable dispersion (D) during the polymerisation, possibly the curing of the polymeric microspheres, their purification by washing with hot water, and the separation of the continuous phase (A); the use of the materials produced in the biomaterials, optics, manufacturing and civil engineering sectors.
(FR) On réalise des polymérisations en suspension afin de produire des microsphères de matières polymères. Selon les revendications, on réduit la phase monomère en microsphères à l'aide d'une phase continue (A) constituée d'au moins un polysaccharide dissous dans de l'eau distillée chauffée, d'une phase monomère (B) constituée d'au moins un monomère et du catalyseur, d'une dispersion instable (C) produite par un mélange mécanique des phases précédentes, et d'une dispersion stable (D) produite par la réduction de la température de la dispersion instable jusqu'à ce que la phase continue subit une gélification, et on arrête l'agitation; on produit les microsphères polymères (E) à l'aide de procédés continus ou discontinus consistant à faire monter et à régler la température de la dispersion stable (D) pendant la polymérisation, éventuellement à cuire les microsphères polymères, à les épurer par un lavage avec de l'eau chaude, et à séparer la phase continue (A); et on utilise les matériaux ainsi produits dans les domaines des matériaux biologiques, de l'optique, de l'industrie et du génie civil.
Designated States: AU, BB, BG, BR, CA, CS, FI, HU, JP, KP, KR, LK, MG, MN, MW, NO, PL, RO, SD, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, MC, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1991089341