Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1981-01-07
1982-09-07
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528125, 528128, 528172, 528173, 528184, 528185, 528189, 528226, 528229, 528335, 528337, 528348, 528350, 528352, C08G 7314
Patent
active
043485138
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The field of this invention relates to tailor-made amide-imide copolymers and terpolymers prepared from tricarboxylic acid anhydride derivatives, N,N'-diacylated diamines, N-acylated diamines and diamines and to molding resins and molded articles prepared therefrom.
2. Background
Amide-imide polymers and copolymers are a relatively new class of organic compounds known for their solubility in nitrogen-containing solvents when in the polyamic acid form. The major application of these amide-imides has been as wire enamels. This is illustrated in U.S. Pat. Nos. 3,817,942 (1974), 3,661,832 (1972), 3,494,890 (1970) and 3,347,828 (1967). British Specification No. 570,858 (1945) discloses the general state of the art. Amide-imide polymers and copolymers have also been found useful for molding application as shown in U.S. Pat. Nos. 4,016,140 (1977) and 3,573,260 (1971). Both are incorporated herein by reference. None of the foregoing references discloses tailor-made amide-imide copolymers and terpolymers.
The general object of this invention is to provide injection moldable linear high molecular weight amide-imide copolymers and terpolymers. A more specific object of this invention is to provide a novel process for preparing injection moldable tailored linear high molecular weight amide-imide copolymers and terpolymers by reacting acylated diamines with tricarboxylic acid anhydrides and diamines, at a temperature of about 50.degree. to 700.degree. F., wherein the imide, imide-imide, amide, amide-amide moieties incorporated into the polymer backbone can be controlled by acylating the amine functionality which is to form the amide and amide-amide moieties which polycondensation reaction is conducted at a temperature of about 300.degree. to about 700.degree. F. while reacting directly at a temperature of about 50.degree. F. to about 400.degree. F. those diamines with the tricarboxylic anhydride compound which are intended to form the imide and imide-imide moieties of the amide-imide copolymers and terpolymers. The molar ratio of the aromatic to aliphatic, cycloaliphatic and araliphatic diamines are suitably in the range of about 9:1 to 1:1, advantageously in the range of about 3:1 to 3:2.
In the novel process, the imide and imide-imide moieties incorporated into the polymer backbone are controlled by reacting at a temperature of about 50.degree. to about 400.degree. F. diamines with the tricarboxylic anhydride compound to form imide and imide-imide linkages and by the reaction of acylated diamines at a temperature of about 300.degree. to about 700.degree. F. to form amide and amide-amide linkages and sometimes acylated diamines at a temperature of about 350.degree. F. to about 700.degree. F. which form imide or imide-imide linkages. Generally the reaction of free amine groups is conducted prior to the reaction of acylated amine groups. Thus the initial temperature of the polymerization process is at the lower end of the ranges cited, from about 50.degree. F. to about 400.degree. F., and the final polymerization temperatures are in the range of about 300.degree. F. to about 700.degree. F. Generally, depending on the type of product desired, the range of acylation can be from about 40% of the total amine functionality up to 100% of the total amine functionality, preferably about 50-95% of the total amine functionality. Advantageously these monomers are mixed in the presence of solvents such as N-methylpyrrolidone, N,N-dimethylacetamide, acetic acid, etc. According to the process of this invention the copolymers and terpolymers may contain from two up to six different structural units set forth hereinbelow: ##STR1##
In the foregoing structural units Z is a trivalent aromatic radical. Z may be a trivalent radical of benzene, naphthalene, biphenyl, diphenyl ether, diphenyl sulfide, diphenyl sulfone, ditolyl ether, and the like.
Useful aromatic tricarboxylic acid anhydrides which contribute the trivalent radical moiety of Z include those compounds containing at least on
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Keske Robert G.
Stephens James R.
Blumberg Gunar J.
Lee Lester L.
Magidson William H.
McClain William T.
Standard Oil Company (Indiana)
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