Liquid composition polymerizable into organic glass having good optical and physico-mechanical properties

The polymerizable liquid composition according to any of the previous claims wherein the phthalic esters (B) are ortho, meta or para-phthalates of aliphatic alcohols containing from 1 to 3 carbon atoms in the molecule.

The polymerizable liquid composition according to any of the previous claims wherein, when a phthalic ester different from diallyl orthophthalate, diallyl isophthalate or diallyl terephthalate, is used as component (B), allyl alcohol (D) must be added to the reaction mixture in a molar quantity equal to about 1-3 times that of the phthalate (B).

The polymerizable liquid composition according to any of the previous claims wherein the polyols (C) are polyols consisting of aliphatic glycols, linear or branched, containing from two to eight carbon atoms in the molecule.

The polymerizable liquid composition according to any of the claims from 1 to 7, wherein the polyols (C) are aliphatic polyols, linear or branched, containing from four to twenty carbon atoms and from three to six hydroxyl groups in the molecule.

A process for the preparation of a polymerizable liquid composition according to any of the previous claims, comprising putting the diallyl carbonate (A), the phthalic ester (B), the polyol (C) and, optionally, the allyl alcohol (D), in contact with each other, operating under transesterification conditions, at a temperature ranging from 80° C. to 160° C., in the presence of a catalyst of the alkaline type.

The process according to any of the claims from 15 to 19, wherein the reaction times range from 0.5 hours to 20 hours.

The polymerizable liquid composition according to any of the previous claims, which is transformed into organic glass by radicalic polymerization using one or more polymerization initiators, operating within a temperature range of 30° C. to 120° C., with polymerization times varying from 1 hour to 100 hours.

The polymerizable liquid composition according to any of the claims from 23 to 27, wherein the quantity of initiator used varies within a range of 1 to 6 parts by weight for every 100 parts by weight of the composition itself.