Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1997-04-30
1999-07-06
Truong, Duc
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528185, 528172, 528179, 528207, 528208, 528210, 528211, C08G 6300
Patent
active
059198907
ABSTRACT:
A method for producing polybenzazole, which comprises reacting a PBZ monomer salt with an AA-PBZ monomer or a BB-PBZ monomer in a non-oxidizing solvent having a dehydrating action to give an oligomer, and adding the AA-PBZ monomer or BB-PBZ monomer, which has not been subjected to the above reaction, to allow reaction with the oligomer, whereby to give a polymer having a desired polymerization degree. According to this method, the polymerization degree of the polymer to be obtained finally and of the polymer during production process can be easily controlled.
REFERENCES:
patent: 5276128 (1994-01-01), Rosenberg et al.
Araki Yoshio
Hotta Kiyoshi
Kubota Fuyuhiko
Ohguchi Masakatsu
Toyo Boseki Kabushiki Kaisha
Truong Duc
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