Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-11-22
1980-05-06
Daus, Donald G.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
525465, 525509, 428412, C07C 6996, C08L 6100
Patent
active
042017203
ABSTRACT:
Aliphatic or cycloaliphatic polycarbonate-triols having a molecular weight of not more than 3,000, which contain hydrophobic segments and are liquid at room temperature are obtained by transesterifying an aryl carbonate with a primary aliphatic triol and a mixture of two diols, HOAOH and HOBOH, at least one of the radicals A or B being a hydrophobic radical, the proportion of the primary aliphatic triol is such that there is statistically one molecule of the said triol per polymer chain in the product, and the ratio of the diols being such that the polycarbonate-triol obtained is equivalent to a mixture of a% by weight of a polycarbonate derived from the triol and the diol HOAOH alone, and of b% by weight of a polycarbonate derived from the triol and the diol HOBOH alone, the percentages a and b corresponding to the following two conditions:
REFERENCES:
patent: 2787632 (1957-04-01), Stevens
patent: 3535287 (1970-10-01), Wynstra
patent: 3966788 (1976-06-01), Senet et al.
patent: 4005121 (1977-01-01), Senet
patent: 4013702 (1977-03-01), Cartier et al.
Lippler Remy R.
Passagne Claude G.
Plazanet Jacques
Senet Jean-Pierre G.
Daus Donald G.
Eakin M. C.
Societe Nationale des Poudres et Explosifs
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