C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 14/12 (2006.01) C08G 14/073 (2006.01) C08G 18/50 (2006.01) C08G 18/54 (2006.01) C08G 65/26 (2006.01) C08J 9/12 (2006.01)
Patent
CA 2343443
Mannich polyols having a viscosity of from 300 to 3,500 cps (0.3 to :3.5 Pa*s) at 25°C are prepared by admixing a phenol, ar alkanolamines, and formaldehyde mixed in molar ratios of from 1:1 .cndot. 1 to 1:2.2.2.2 resulting in an initiator which can be alkoxylated using a mixture of ethylene oxide and propylene oxide to prepare polyols that have a nominal functionality of from 3 to 5.4.
La présente invention concerne des polyols de Mannich présentant une viscosité allant de 300 à 3500 cps (0,3 à 3,5 Pa*s) à 25 DEG C. Ces polyols s'obtiennent par adjonction-mélange d'un phénol, d'alcanolamines, et de formaldéhyde selon des rapports molaires allant de 1:1:1 à 1:2.2:2.2. On obtient ainsi un initiateur qui se prète, par utilisation d'oxide d'éthylène et d'oxyde de propylène, à une alcoxylation permettant l'élaboration de polyols d'une functionnalité nominale allant de 3 à 5,4.
Molina Nelson F.
Moore Stanley E.
Dow Global Technologies Inc.
Smart & Biggar
The Dow Chemical Company
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