MX167865B - ISOCYANATE COMPOSITION AND PROCESS TO MANUFACTURE FLEXIBLE FOAMS WITH THE SAME - Google Patents
ISOCYANATE COMPOSITION AND PROCESS TO MANUFACTURE FLEXIBLE FOAMS WITH THE SAMEInfo
- Publication number
- MX167865B MX167865B MX020264A MX2026490A MX167865B MX 167865 B MX167865 B MX 167865B MX 020264 A MX020264 A MX 020264A MX 2026490 A MX2026490 A MX 2026490A MX 167865 B MX167865 B MX 167865B
- Authority
- MX
- Mexico
- Prior art keywords
- isocyanate
- average
- same
- isocyanate composition
- flexible foams
- Prior art date
Links
Landscapes
- Polyurethanes Or Polyureas (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
La presente invención se refiere a una composición líquida de un prepolímero que contiene isocianato que tiene una funcionalidad promedio de isocianato de más de 2 y un contenido de NCO de 2 a 12 por ciento por peso, obtenible mediante la reacción de un polímero reactivo de isocianato que tiene una funcionalidad nominal promedio de 2 a 4 y un peso equivalente promedio de aproximadamente 500 a aproximadamente 5000, con un exceso estequiométrico de una composición de difenilmetano diisocianato que contiene, cuando menos, 2 por ciento por peso de 2,4'-difenilmetano diisocianato y que tiene una funcionalidad de isocianato promedio en la escala de 2 a 2.3. Un método para preparar una espuma de poliuretano que comprende hacer reaccionar una composición de prepolímero.The present invention relates to a liquid composition of an isocyanate-containing prepolymer having an average isocyanate functionality of more than 2 and an NCO content of 2 to 12 weight percent, obtainable by reacting an isocyanate reactive polymer having an average nominal functionality of 2 to 4 and an average equivalent weight of about 500 to about 5000, with a stoichiometric excess of a diphenylmethane diisocyanate composition containing at least 2 percent by weight 2,4'-diphenylmethane diisocyanate and having an average isocyanate functionality on the scale of 2 to 2.3. A method of preparing a polyurethane foam comprising reacting a prepolymer composition.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB898908490A GB8908490D0 (en) | 1989-04-14 | 1989-04-14 | Prepolymers |
GB909007535A GB9007535D0 (en) | 1989-04-14 | 1990-04-03 | Isocyanate composition and process for making flexible foams therefrom |
Publications (1)
Publication Number | Publication Date |
---|---|
MX167865B true MX167865B (en) | 1993-04-19 |
Family
ID=26295219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX020264A MX167865B (en) | 1989-04-14 | 1990-04-10 | ISOCYANATE COMPOSITION AND PROCESS TO MANUFACTURE FLEXIBLE FOAMS WITH THE SAME |
Country Status (1)
Country | Link |
---|---|
MX (1) | MX167865B (en) |
-
1990
- 1990-04-10 MX MX020264A patent/MX167865B/en unknown
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