Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1986-04-10
1988-10-04
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528 72, 528 73, 528220, 528228, 528322, 528353, C08G 7310
Patent
active
047757400
ABSTRACT:
The subject invention pertains to a novel class of fire- and heat-resistant bisimide resins prepared by thermal polymerization of maleimido or citraconimido substituded 1-[(dialkoxyphosphonyl)-methyl]-2-4 and -2,6-diaminobenzenes. Typical polymer presursors have the chemical structure: ##STR1## wherein R is alkyl, substituted alkyl or aryl, and R.sup.1 is hydrogen or lower alkyl.
The polymer precursors are prepared by reacting 1-[(diorganooxyphosphonyl)methyl]-2-4 and -2,6-diaminobenzenes with maleic anhydride or citraconic anhydride in a mole ratio 1:2. Chains extension of the monomers is achieved by reacting the mono-N-maleimido derivatives of 1-[(diorganooxyphosphonyl)methyl]-2,4 and -2,6-diaminobenzenes with aryl tetracarboxylic dianhydrides, such as benzophenone tetracarboxylic diandydride, or aryl diisocyanates, such as methylenebis(4-phenylisocyanate), in a mole ratio 2:1. The polymerization of the monomers is studied by differential scanning calorimetry (DSC) and the thermal stability of the polymers is ascertained by thermogravimetric analysis (TGA).
REFERENCES:
patent: 4587324 (1986-05-01), Mikroyannidis et al.
Beggs James M.
Kourtides Demetrius A.
Mikroyannidis John A.
Anderson Harold D.
Brekke Darrell G.
Glenn Charles E. B.
Manning John R.
The United States of America as represented by the Administrator
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