Enichem Synthesis S.p.a

Boston S.p.a.

Patrizia Blasioli

Alberto Greco

Sergio Giordano

Enrico Pozzi

Copolyester-diol polycarbonates fluid at room temperature, having a number average molecular weight comprised within the range of from 1,500 to 6,000 with a glass transition temperature (T.sub.g) lower than -45.degree. C., useful in the sector of polyurethanes and in the sector of sealants, are obtained by means of a reaction of transesterification by starting from:

Copolyester-diol polycarbonates, process for producing them and their use

A reactive hot melt composition comprises the products of the reaction between (A) an aliphatic or aromatic diisocyanate and (B) a mixture containing: (1) a crystalline polycarbonate diol, (2) an elastomeric polycarbonate diol or an elastomeric polycarbonate copolyester diol, and possibly (3) a vitreous polycarbonate diol or a vitreous polycarbonate copolyester diol. The process for preparing the reactive hot melt composition is also described .

Growing community of inventors

Biassono, Italy

Patrizia Blasioli