Catalytic process for preparing poly(alkylene dicarboxylates) an

Details Catalytic process for preparing poly(alkylene dicarboxylates) an Catalytic process for preparing poly(alkylene dicarboxylates) an

1983-06-09

1984-06-05

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C08G 6304, C08G 6334

Patent

active

044529708

ABSTRACT:
Poly(alkylene dicarboxylates) such as poly(alkylene terephthalates) are prepared by reacting a dicarboxylic acid or alkyl ester thereof with an alkanediol in the presence of a titanium-containing chelate compound which may be prepared by the reaction of a tetraalkyl titanate with an ortho-disubstituted hydroxyaromatic compound of the formula ##STR1## wherein X.sup.1 is hydrogen, lower alkyl or lower aryl. Polymerization by this method minimizes ester-carbonate interchange in blends of the poly(alkylene dicarboxylates) with aromatic polycarbonates. The chelates in which X.sup.1 is lower alkyl or lower aryl are novel compounds.

REFERENCES:
patent: 3444139 (1969-05-01), Jeurissen et al.
patent: 4148989 (1979-04-01), Tews et al.
patent: 4260735 (1981-04-01), Bander et al.
Polymer Eng. & Science, 22, pp. 229-233, (1982).
Chem. Abstracts, 83, 148316s, (1975).
Chem. Abstracts, 84, 44989t, (1976).
J. Inorg. Nucl. Chem., 21, pp. 58-63, (1961).

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