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1. (WO1997018265) METHOD FOR CONTROLLING SURFACE CONCENTRATION OF A POLYMER ADDITIVE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/018265 International Application No.: PCT/US1996/018272
Publication Date: 22.05.1997 International Filing Date: 13.11.1996
Chapter 2 Demand Filed: 09.06.1997
IPC:
B29C 33/38 (2006.01) ,B29C 67/24 (2006.01) ,C08L 67/02 (2006.01) ,C08L 69/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
33
Moulds or cores; Details thereof or accessories therefor
38
characterised by the material or the manufacturing process
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
67
Shaping techniques not covered by groups B29C39/-B29C65/93
24
characterised by the choice of material
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
67
Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
02
Polyesters derived from dicarboxylic acids and dihydroxy compounds
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
69
Compositions of polycarbonates; Compositions of derivatives of polycarbonates
Applicants:
COBE LABORATORIES, INC. [US/US]; 1185 Oak Street Lakewood, CO 80215, US
Inventors:
FORRESTAL, Lloyd; US
VOORHEES, Marc; US
Agent:
O'CONNOR, Edna, M.; 1201 Oak Street Lakewood, CO 80215, US
Priority Data:
08/558,32115.11.1995US
60/006,76415.11.1995US
null12.11.1996US
Title (EN) METHOD FOR CONTROLLING SURFACE CONCENTRATION OF A POLYMER ADDITIVE
(FR) PROCEDE DE REGLAGE DE LA CONCENTRATION SUPERFICIELLE D'UN ADDITIF POUR POLYMERE
Abstract:
(EN) The surface free energy of a polymer blend where a base polymer contains an additive having a different surface free energy than that of the base polymer can be controlled over a wide range of additive surface concentrations by appropriate choice of the mold surface free energy during fabrication. A high surface concentration of additive relative to a low bulk concentration can be achieved, leading to improved biocompatibility without loss of optical clarity.
(FR) La présente invention concerne un procédé de modification de la tension superficielle d'un mélange polymère dans lequel un polymère de base contient un additif dont la tension superficielle est différente de celle du polymère de base, et ce, sur une large plage de concentrations superficielles d'additif. Le procédé consiste à utiliser, pendant la fabrication, une surface de moulage présentant une tension superficielle adéquate. Ce procédé permet d'atteindre une concentration superficielle élevée de l'additif pour une faible concentration de masse, donnant ainsi une meilleure biocompatibilité sans perte de limpidité optique.
Designated States: AU, CA, JP, MX
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1997011592