C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/48 (2006.01) C08F 283/00 (2006.01) C08F 283/06 (2006.01) C08F 290/14 (2006.01) C08F 299/06 (2006.01) C08G 18/67 (2006.01)
Patent
CA 2376203
A urethane (meth)acrylate oligomer which has a low viscosity and gives a flexible cured article reduced in surface tackiness. It is obtained by reacting a polyol ingredient comprising a polyoxyalkylene polyol which has two to four hydroxyl groups, a hydroxyl value VOH (mg-KOH/g) of 5 to 115, and a total degree of unsaturation VUS (meq/g) satisfying the relationship VUS<=(0.45/VOH)+0.02, with a polyisocyanate compound and a hydroxylated (meth)acrylate compound.
L'invention concerne un oligomère d'uréthanne (méth)acrylate présentant une viscosité réduite et conférant à un article souple durci un pouvoir d'adhérence limité. On obtient cet oligomère en faisant réagir un ingrédient polyol, qui renferme un polyol de polyoxyalkylène présentant deux à quatre groupes hydroxyles, une valeur hydroxyle V¿OH? (mg-KOH/g) située entre 5 et 115, et un degré d'insaturation total V¿US? (meq/g) vérifiant la relation V¿US?<=(0,45/V¿CH?)+0,02, avec un composé de polyisocyanate et un composé de (méth)acrylate hydroxylé.
Asahi Glass Company Limited
Smart & Biggar
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