Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1977-10-27
1979-10-02
Hamrock, William F.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
536 1, 526112, 525281, C08F 830
Patent
active
041699238
ABSTRACT:
Polymers having molecular weight between 1,000 and 1,500,000 characterized in that they contain radicals of nicotinic acid bound to the macromolecular structure by covalent bonds that are gradually hydrolyzed in biological environment by setting free nicotinic acid and non-toxic polymer residues.
REFERENCES:
patent: 2701244 (1955-02-01), Ham
patent: 4067876 (1978-01-01), Ferruti et al.
"Syntheses of Nicotinic Acid Derivative, " Chem. Abstr., Kataoka, 69294v, vol. 68, 1968.
Ferruti Paolo
Paoletti Rodolfo
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