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1. (WO1997016463) POLYMERS COMPRISING REVERSIBLE HYDROPHOBIC FUNCTIONALITIES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/016463 International Application No.: PCT/US1996/017071
Publication Date: 09.05.1997 International Filing Date: 24.10.1996
Chapter 2 Demand Filed: 21.05.1997
IPC:
A61K 9/28 (2006.01) ,A61K 9/50 (2006.01) ,A61K 47/34 (2006.01) ,A61L 15/60 (2006.01) ,C08F 2/24 (2006.01) ,C08F 283/06 (2006.01) ,C08F 290/06 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9
Medicinal preparations characterised by special physical form
20
Pills, lozenges or tablets
28
Dragees; Coated pills or tablets
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9
Medicinal preparations characterised by special physical form
48
Preparations in capsules, e.g. of gelatin, of chocolate
50
Microcapsules
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
47
Medicinal preparations characterised by the non-active ingredients used, e.g. carriers, inert additives
30
Macromolecular compounds
34
Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
L
METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
15
Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
16
Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
42
Use of materials characterised by their function or physical properties
60
Liquid-swellable gel-forming materials, e.g. super-absorbents
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
22
Emulsion polymerisation
24
with the aid of emulsifying agents
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
283
Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G117
06
on to polyethers, polyoxymethylenes or polyacetals
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
290
Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
02
on to polymers modified by introduction of unsaturated end groups
06
Polymers provided for in subclass C08G52
Applicants:
MICHIGAN STATE UNIVERSITY [US/US]; A202 Engineering Building East Lansing, MI 48824, US
Inventors:
SCRANTON, Alec, B.; US
KLIER, John; US
MATHUR, Arvind, M.; US
Agent:
CARRIER, Robert, J.; Price, Heneveld, Cooper, DeWitt & Litton 695 Kenmoor, Southeast P.O. Box 2567 Grand Rapids, MI 49501, US
Priority Data:
08/695,23708.08.1996US
60/006,21103.11.1995US
Title (EN) POLYMERS COMPRISING REVERSIBLE HYDROPHOBIC FUNCTIONALITIES
(FR) POLYMERES COMPORTANT DES FONCTIONNALITES HYDROPHOBES REVERSIBLES
Abstract:
(EN) Polymers comprising reversible hydrophobic functionalities are disclosed. The preferred embodiment polymers comprise Lewis acid segments and Lewis base segments. The polymer segments are, by themselves, hydrophilic and will either swell or dissolve in water. When the segments are incorporated into a polymer according to the present invention, the segments form water-insoluble or hydrophobic complexes. Upon changes in pH, temperature or solvent type, these complexes may dissociate, giving large transitions in polymer viscosity, emulsification ability, mechanical strength or transport properties. These polymers are useful as reversible emulsifiers which form stable emulsions at acidic pH and unstable emulsions at basic pH, as water-borne thickeners having low viscosity at low pH and high viscosity at high pH, as superabsorbing resins, or as coatings for pharmaceutical or agricultural agents.
(FR) Cette invention se rapporte à des polymères comportant des fonctionnalités hydrophobes réversibles. Les polymères de la réalisation préférée de l'invention comportent des segments d'acide de Lewis et des segments de base de Lewis. Lorsqu'ils sont tout seuls, ces segments de polymères sont hydrophiles et peuvent soit gonfler soit se dissoudre dans l'eau. Lorsque ces segments sont incorporés à un polymère conformément à la présente invention, ils forment des complexes hydrophobes ou insolubles dans l'eau. Lors de changements de PH, de température ou de type de solvant, ces complexes peuvent se dissocier et entraîner des changements importants dans les caractéristiques de viscosité, de capacité d'émulsification, de résistance mécanique ou de transport du polymère. Ces polymères sont utiles en tant qu'émulsifiants réversibles capables de former des émulsions stables à un pH acide et des émulsions instables à un PH basique, en tant qu'épaississants à l'eau présentant une faible viscosité à pH peu élevé et une forte viscosité à PH élevé, en tant que résines superabsorbantes, ou en tant que matières d'enrobage pour des agents pharmaceutiques ou agricoles.
Designated States: AU, BR, CA, CN, JP, KR, 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:
AU1996074726