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1. (WO1998050451) AQUEOUS DISPERSIONS OF POLYAMIDES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/050451 International Application No.: PCT/US1998/009208
Publication Date: 12.11.1998 International Filing Date: 08.05.1998
Chapter 2 Demand Filed: 16.10.1998
IPC:
C08J 3/03 (2006.01) ,C08J 3/07 (2006.01) ,C08K 5/00 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
J
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
3
Processes of treating or compounding macromolecular substances
02
Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
03
in aqueous media
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
J
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
3
Processes of treating or compounding macromolecular substances
02
Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
03
in aqueous media
07
from polymer solutions
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
K
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
5
Use of organic ingredients
Applicants:
HENKEL CORPORATION [US/US]; Suite 200 2500 Renaissance Boulevard Gulph Mills, PA 19406, US
Inventors:
FISCHER, Stephen, A.; US
BOUDREAUX, Chase, J.; US
WIGGINS, Michael, S.; US
Agent:
MEDER, Martin, G.; Henkel Corporation Suite 200 2500 Renaissance Boulevard Gulph Mills, PA 19406, US
Priority Data:
08/853,31108.05.1997US
Title (EN) AQUEOUS DISPERSIONS OF POLYAMIDES
(FR) DISPERSIONS AQUEUSES DE POLYAMIDES
Abstract:
(EN) A process is provided for preparing a dispersion of a polyamide in water, said process comprising: dissolving a polyamide having an amine value of greater than about 2 in an organic solvent to form a solution of said polyamide in said solvent, said polyamide and said solvent being at a temperature below the softening point of said polyamide during said dissolving, said solution further comprising a surfactant and an inorganic alkaline material; adding sufficient water containing an acid to said solution with mixing to form an oil-in-water dispersion, the temperature of said solution and said water being below the softening point of said polyamide during said adding, the amount of said acid being sufficient to neutralize a portion of said inorganic alkaline material, but insufficient to coagulate said polyamide from the resulting oil-in-water dispersion; and removing at least a major amount of said organic solvent from said oil-in-water dispersion. The resulting dispersion is useful in preparing a coating of the polyamide, which coating is useful as an adhesive.
(FR) L'invention concerne un procédé permettant de préparer une dispersion de polyamide aqueuse qui consiste à: faire dissoudre un polyamide présentant un indice d'amine supérieur à environ 2 dans un solvant organique pour former une solution dudit polyamide dans ledit solvant, ce polyamide et ce solvant étant à une température inférieure au point de ramollissement dudit polyamide pendant cette opération de dissolution et ladite solution comprenant en outre un tensioactif et une substance alcaline inorganique; ajouter une quantité suffisante d'eau contenant un acide à ladite solution, tout en effectuant un mélange pour former une dispersion huile dans eau, la température de ladite solution et de l'eau étant inférieure au point de ramollissement dudit polyamide pendant cette opération d'addition et la quantité d'acide étant suffisante pour neutraliser une partie de ladite substance alcaline inorganique, mais insuffisante pour faire coaguler le polyamide contenu dans la dispersion huile dans eau obtenue; et enlever au moins la majeure partie dudit solvant inorganique contenu dans la dispersion huile dans eau. La dispersion obtenue peut être utile pour préparer un revêtement constitué du polyamide, revêtement qui est utile en tant qu'adhésif.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0980401JP2001527596 AU1998072889