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1. (WO1998050450) AQUEOUS DISPERSIONS OF POLYAMIDES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/050450 International Application No.: PCT/US1998/008981
Publication Date: 12.11.1998 International Filing Date: 07.05.1998
Chapter 2 Demand Filed: 30.09.1998
IPC:
C08G 69/34 (2006.01) ,C08J 3/03 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
69
Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
02
Polyamides derived from amino carboxylic acids or from polyamines and polycarboxylic acids
26
derived from polyamines and polycarboxylic acids
34
using polymerised unsaturated fatty acids
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
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:
08/852,96708.05.1997US
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: forming a solution of a polyamide having an acid 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, wherein at least a portion of the acid value of said polyamide is neutralized, adding sufficient water 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, 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 a trait à un procédé de préparation de dispersion d'une polyamide dans de l'eau, lequel procédé consiste à constituer une solution d'une polyamide d'un indice d'acidité supérieur à 2 environ dans un solvant organique afin d'obtenir une solution de ladite polyamide dans ledit solvant, tous deux se trouvant à une température inférieure au point de ramollissement de la polyamide durant cette dissolution. La solution comporte, de surcroît, un tensioactif et l'indice d'acidité de ladite polyamide est, au moins partiellement, neutralisé. On ajoute, dans le cadre de ce procédé, de l'eau à la solution et ce, en quantité suffisante, puis on mélange pour former une dispersion huile-dans-eau, la température de la solution et celle de l'eau étant inférieures au point de ramollissement de la polyamide durant l'opération d'adjonction et on retire ensuite une quantité, notable à tout le moins, dudit solvant organique de la dispersion huile-dans-eau. La dispersion ainsi obtenue se prête bien à l'élaboration d'un revêtement à base de polyamide, utilisable comme 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:
EP0980400JP2001527594 AU1998071755