Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1980-03-10
1982-03-09
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528180, 528194, C08G 6322
Patent
active
043190170
ABSTRACT:
Linear aromatic polyesters of bisphenols and dicarboxylic compounds are prepared by transesterification polymerization in either a fully continuous process or in a semi-continuous process wherein a first stage is conducted batchwise and a second stage is conducted in a continuous manner wherein the second stage employs a wiped film reactor. The processes are preferably conducted in the presence of a catalyst in liquid form, and further under conditions wherein the catalyst is introduced to the polymerization concurrent with the introduction of liquid phase reactants to avoid substantial heating of the reactants in contact with the catalyst prior to onset of the transesterification reaction. The products of the processes have an unexpectedly low polydispersity.
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Ludwig, Polyesterfasern, Chemie & Technologie, Akademie-Verlag, Berlin, 1975, pp. 170-174.
"Luwa Polymer Technology", Trade Bulletin 115-119, Luwa Corp., Charlotte, NC.
Kosanovich George M.
Salee Gideon
Hooker Chemicals & Plastics Corp.
Mudd James F.
Stein David A.
Tao James F.
Welsh Maurice J.
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