Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO1992013012) METHOD OF PREPARING AQUEOUS DISPERSIONS OF ETHYLENE/$g(a),$g(b)-UNSATURATED CARBOXYLIC ACID INTERPOLYMERS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1992/013012 International Application No.: PCT/US1992/000622
Publication Date: 06.08.1992 International Filing Date: 24.01.1992
IPC:
C08F 8/44 (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
8
Chemical modification by after-treatment
44
Preparation of metal salts or ammonium salts
Applicants:
ROWLAND, Michael, E. [US/US]; US (UsOnly)
SPRINGS, Kenneth, E. [US/US]; US (UsOnly)
THE DOW CHEMICAL COMPANY [US/US]; 2030 Dow Center, Abbott Road Midland, MI 48640, US (AllExceptUS)
Inventors:
ROWLAND, Michael, E.; US
SPRINGS, Kenneth, E.; US
Agent:
KRUPP, Stephen, P.; The Dow Chemical Company Patent Department Building B-1211 Freeport, TX 77541, US
Priority Data:
646,13425.01.1991US
Title (EN) METHOD OF PREPARING AQUEOUS DISPERSIONS OF ETHYLENE/$g(a),$g(b)-UNSATURATED CARBOXYLIC ACID INTERPOLYMERS
(FR) PROCEDE DE PREPARATION DE DISPERSION AQUEUSE D'INTERPOLYMERES D'ETHYLENE/ACIDE CARBOXYLIQUE $g(a),$g(b)-INSATURES
Abstract:
(EN) Aqueous dispersions of ethylene/$g(a),$g(b)-unsaturated carboxylic acid interpolymers (e.g., random ethylene/acrylic acid interpolymers) are formed using a mixture of bases at a concentration of at least 0.2 equivalents of base per mole of $g(a),$g(b)-unsaturated carboxylic acid. The dispersions have at least 10 weight percent dispersed solids and not more than 1 weight percent of the initial polymer in non-dispersed form. Preferred bases for use in forming the dispersions are ammonium hydroxide and/or alkali metal hydroxides. A mixture of ammonium hydroxide and potassium hydroxide is especially preferred for forming the dispersions with ethylene/acrylic acid interpolymers at an ammonium hydroxide: acrylic acid molar ratio of 1:1 and a potassium hydroxyde:acrylic acid molar ratio in the range of 0.6-0.8:1. The dispersions are particularly useful in forming thin coatings of adhesive on substrates, such as paper and metal foil, using conventional techniques.
(FR) On forme des dispersions aqueuses d'interpolymères d'éthylène/acide carboxylique $g(a),$g(b)-insaturé (par exemple, des interpolymères aléatoires d'éthylène/acide acrylique) au moyen d'un mélange de base à une concentration d'au moins 0,2 équivalent de base par mole d'acide carboxylique $g(a),$g(b)-insaturé. Les dispersions renferment au moins 10 % en poids de solides dispersés et pas plus de 1 % en poids du polymère initial sous forme non dispersée. Les bases préférées utilisées pour former les dispersions sont l'hydroxyde d'ammonium et/ou des hydroxydes de métaux alcalins. Un mélange d'hydroxyde d'ammonium et d'hydroxyde de potassium est particulièrement préféré pour former les dispersions avec des interpolymères d'éthylène/acide acrylique à un rapport molaire entre l'hydroxyde d'ammonium et l'acide acrylique de 1:1, et un rapport molaire entre l'hydroxyde de potassium et l'acide acrylique situé dans la plage comprise entre 0,6 à 0,8:1. Les dispersions sont particulièrement utiles dans la formation de couches minces d'adhésif sur des substrats, telles que des feuilles de papier et de métal, selon des techniques classiques.
Designated States: AU, CA, FI, JP, KR, US
European Patent Office (EPO) (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, MC, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)