Joseph Z Lacona, Age 96374 Thomas Rd, Canonsburg, PA 15317
Joseph Lacona Phones & Addresses
374 Thomas Rd, Canonsburg, PA 15317 (724) 941-7544
McMurray, PA
374 Thomas Rd, Canonsburg, PA 15317 (724) 493-9337
Work
Position:
Retired
Education
Degree:
High school graduate or higher
Emails
Mentions for Joseph Z Lacona
Publications
Us Patents
Process For Reducing The Processing Time In The Production Of Polyesters
US Patent:
RE30481, Jan 13, 1981
Filed:
Sep 10, 1979
Appl. No.:
6/073628
Inventors:
Joseph Lacona - Pittsburgh PA
Assignee:
Koppers Company, Inc. - Pittsburgh PA
International Classification:
C08G 6316
US Classification:
528302
Abstract:
Polyesters obtained by reacting isophthalic acid or terephthalic acid with a polyol with or without a catalyst in a first stage to form a half-ester mixture which is reacted in a second stage with an aliphatic polycarboxylic acid are produced at reduced processing times. In the first stage a portion of the total polyol to be reacted is contacted with substantially all of the isophthalic acid or terephthalic acid. Then, this mixture is heated with agitation to a temperature of at least 190. degree. C. and the remaining portion of the polyol is added to the heated mixture with agitation in such a manner that the temperature remains at or above the 190. degree. C. This temperature is maintained until the reaction to form a half-ester mixture is completed. This reaction may be conducted in the presence of an esterification catalyst. The polyester-monomer mixture is reacted in a second stage with an aliphatic polycarboxylic acid to produce the polyester.
Process For Reducing The Processing Time In The Production Of Polyesters
US Patent:
4046739, Sep 6, 1977
Filed:
Sep 25, 1975
Appl. No.:
5/616770
Inventors:
Joseph Lacona - Canonsburg PA
Assignee:
Koppers Company, Inc. - Pittsburgh PA
International Classification:
C08G 6352
C08G 6316
C08G 6316
US Classification:
260 75M
Abstract:
Polyesters obtained by reacting isophthalic acid or terephthalic acid with a polyol with or without a catalyst in a first stage to form a half-ester mixture which is reacted in a second stage with an aliphatic polycarboxylic acid are produced at reduced processing times. In the first stage a portion of the total polyol to be reacted is contacted with substantially all of the isophthalic acid or terephthalic acid. Then, this mixture is heated to a temperature of at least 190. degree. C. and the remaining portion of the polyol is added to the heated mixture in such a manner that the temperature remains at or above the 190. degree. C. This temperature is maintained until the reaction to form a half-ester mixture is completed. This reaction may be conducted in the presence of an esterification catalyst. The polyester-monomer mixture is reacted in a second stage with an aliphatic polycarboxylic acid to produce the polyester.
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