Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1999-03-16
2000-07-18
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528 44, 528 48, 528 51, 528 67, 528310, 528322, 524710, 524872, 524873, C08G 7300, C08G 1800, C08L 4900
Patent
active
060909064
ABSTRACT:
There are provided a polycarbodiimide copolymer having a main structure represented by the following formula (1): ##STR1## wherein R.sub.1 is an isocyanate residue; R.sub.2 is a polyfunctional liquid rubber residue; X is a urethane bond, an amide bond or a urea bond; p is an integer of 5 to 50; q is an integer of 1 to 5; and r is 0 or 1; and a process for producing the above polycarbodiimide copolymer, which comprises reacting a polyfunctional liquid rubber with an organic diisocyanate in excess of the rubber and then subjecting the diisocyanate components in the reaction system to carbodiimization using a carbodiimidization catalyst. The polycarbodiimide copolymer alleviates the problems of the prior art, has the excellent heat resistance inherently possessed by polycarbodiimide resins, is improved, as compared with conventional polycarbodiimide resins, in thermoformability under heating and pressure when made into a solid such as a powder or granules, and causes no blistering under heating.
REFERENCES:
patent: 4042558 (1977-08-01), Von Bonin et al.
patent: 4067820 (1978-01-01), Wagner et al.
patent: 4076763 (1978-02-01), Thom et al.
patent: 4088665 (1978-05-01), Findeisen et al.
patent: 4294719 (1981-10-01), Wagner et al.
patent: 4344855 (1982-08-01), Schafer et al.
patent: 4424288 (1984-01-01), Patton, Jr. et al.
patent: 5100994 (1992-03-01), Amano et al.
patent: 5264518 (1993-11-01), Amano
patent: 5416184 (1995-05-01), Amano et al.
Amano Satoshi
Nakamura Norimasa
Hampton-Hightower P.
Nisshinbo Industries Inc.
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