C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 69/96 (2006.01) C07C 68/06 (2006.01) C08F 18/24 (2006.01) C08F 218/00 (2006.01) G02B 1/04 (2006.01)
Patent
CA 2349858
Liquid composition which can be polymerized into organic glasses, by means of radical polymerization with low shrinkage, comprising the product obtained from the trans-esterification of a diallycarbonate (A) with a mixture of one or more linear or branched aliphatic diols (B), containing from three to ten carbon atoms in the molecule, with a linear or branched aliphatic polyol (C), containing from four to twenty carbon atoms and from three to six hydroxyl groups in the molecule. The molar ratio AI(B+C) in the above polymerizable liquid composition ranges from 2/1 to 511 and the quantity of (C) in the mixture (B+C) is equal to or less than 25 % by weight with respect to the total weight of this mixture.
L'invention concerne une composition liquide pouvant être polymérisée en verres organiques, par polymérisation radicalaire à faible rétrécissement, comprenant le produit obtenu de la transestérification d'un diallylcarbonate (A) avec un mélange d'un ou de plusieurs diols aliphatiques linéaires ou ramifiés (B), contenant trois à dix atomes de carbone dans la molécule, avec un polyol aliphatique linéaire ou ramifié (C) contenant quatre à vingt atomes de carbone et trois à six groupes hydroxyle dans la molécule. Le rapport molaire A/(B+C) dans la composition liquide polymérisable précitée s'établit entre 2/1 et 5/1, et la quantité de (C) dans le mélange (B+C) est égale ou inférieure à 25 % en poids par rapport au poids total de ce mélange.
Bendandi Andrea
Forestieri Roberto
Nodari Nereo
Renzi Fiorenzo
Acomon Ag
Great Lakes Chemical (europe) Gmbh
Robic
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