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Machine translation
1. (WO2000061653) POLYURETHANE FILMS PREPARED FROM POLYURETHANE DISPERSIONS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2000/061653    International Application No.:    PCT/US2000/009969
Publication Date: 19.10.2000 International Filing Date: 13.04.2000
Chapter 2 Demand Filed:    07.11.2000    
IPC:
C08G 18/08 (2006.01), C08G 18/12 (2006.01), C08G 18/28 (2006.01), C08G 18/48 (2006.01), C08G 18/76 (2006.01)
Applicants: THE DOW CHEMICAL COMPANY [US/US]; 2030 Dow Center, Midland, MI 48674 (US)
Inventors: KOONCE, William, A.; (US).
PARKS, Franklin, E.; (US).
BHATTACHARJEE, Debkumar; (US)
Agent: JOZWIAK, Elisabeth, T.; Intellectual Property, P.O. Box 1967, Midland, MI 48641-1967 (US)
Priority Data:
60/129,279 14.04.1999 US
Title (EN) POLYURETHANE FILMS PREPARED FROM POLYURETHANE DISPERSIONS
(FR) FILMS DE POLYURETHANNE OBTENUS A PARTIR DE DISPERSIONS DE POLYURETHANNE
Abstract: front page image
(EN)A process for preparing a polyurethane film comprising two steps is disclosed. The first step comprises preparing a nonionic prepolymer formulation, the prepolymer formulation comprising a diisocyanate, an active hydrogen containing material, and a monol. The second step comprises preparing an aqueous dispersion of the prepolymer, in the presence of a surfactant. Both steps occur in the substantial absence of an organic solvent. Also disclosed is a polyurethane film and an aqueous dispersion useful for preparing such films. The present invention has the advantage of having increased shear stability. The dispersions of the present invention do not settle or coagulate prematurely. Moreover, the films of the present invention do not include the dermal irritants which occur in natural rubber latex. The films and dispersions of the present invention are thus suitable for use in applications such as, for example, medical applications.
(FR)L'invention concerne un procédé de préparation d'un film de polyuréthanne consistant à préparer une formulation prépolymère non ionique renfermant un diisocyanate, un matériau contenant un hydrogène actif et un monol, puis à préparer une dispersion aqueuse du prépolymère en présence d'un tensioactif et ce, en l'absence de solvant organique. Font aussi l'objet de cette invention un film de polyuréthanne et une dispersion aqueuse servant à préparer ces films. Ainsi, ces films sont dotés d'une stabilité à l'usure améliorée. Les dispersions utilisées ne durcissent ni ne coagulent prématurément. En outre, les films ne comprennent pas d'irritants cutanés contrairement au latex caoutchouc naturel. Ces films et ces dispersions sont spécialement indiqués pour des applications médicales, entre autres.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CR, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, UZ, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SL, SZ, TZ, 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, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)