Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1978-08-11
1979-10-02
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528183, 528207, 528208, 528220, 528222, 528229, 528336, 528337, 528348, C08G 6928, C08G 6932
Patent
active
041699327
ABSTRACT:
A method of producing poly-p-phenyleneterephthalamide or its copolymers residing in that p-phenylenediamine or p-phenylenediamine and an aromatic diamine of the diphenyl series is/are disclosed in amide-salt solvents consisting of linear or cyclic N-alkyl-substituted amides of acids and of salts of alkaline or alkaline-earth metals soluble in said amides in amounts of 1-3 moles per mole of diamines; terephthalic acid dichloride or a mixture of terephthalic acid dichloride and aromatic acid dichloride of the diphenyl series are introduced into the solutions obtained at 0.degree.-20.degree. C. in amounts equimolar to those of the diamines, a reaction mixture being thus formed; tertiary amines are introduced into said reaction mixture in amounts 2-6 moles per mole of the initial diamines; the reaction mixture is stirred for 3-70 minutes and the end product is separated from the mass obtained.
The method proposed herein is technologically simple and provides high-molecular polymeric products suitable for manufacturing heat-resistant, high-strength, and high-modulus fibres.
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patent: 3696076 (1972-10-01), Vogelfanger
patent: 3966686 (1976-06-01), Asakura et al.
Japanese Patent Application Publication, 74/122594, Nov. 1974, Chimura et al.-English Translation.
Federov et al., (1), Polymer Science, (USSR), 12, #10-12, (1970), pp. 2475-2491, English Translation.
Federov et al., (2), Vysokomolekulyarnye Soedineniya, (B), 11, (1969), pp. 129-132, English Translation.
Fiber Forming Aromatic Polyamides, Man-Made Fibers, vol. 2, (1968), p. 301.
Polymery, (1971), pp. 514-515, Chodkowski et al., English Translation.
Petrukhin Vyacheslav S.
Savinov Valentin M.
Sokolov Lev B.
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