Radiation hardening of low condensation products containing amino group (in Japanese)
An initial condensation product is prepared by condensing a monomer selected from the group of urea, thiourea, melanine, aniline and acidamide with formalin. 0ne or more of the initial condensation product is then mixed with a substance which forms an acid or base by irradiation with an ionizing radiation in the presence or absence of the initial condensation product, except for halogenated hydrocarbon. The mixture is hardened by irradiation of the ionizing radiation to form a resinous substance. Formamide, acetamide, oxalic diamide, succinic diamide, acrylamide, etc. can be used as the acidamide monomer. Phosphonitrile chloride, cyanuric chloride, chloral hydrate, trichloroacetic acid, monochloroacetic acid, ammonium chloride, aluminium chloride, gaseous chlorine, sullurous acid gas, sodium sulfite, aluminium sulfate, potassium hydrogensulfate, sodium pyrophosphate, potassium pyrophosphate, potassium phosphate, ammonia, bromine, bromal, bromal hydrate, dibromoacetic acid, sulfonated benzene, sulfonated toluene, etc. can be used as the acid- or base- forming substance. To the initial condensation product may be added 0.5-20%, in certain cases 20-50%, by weight of the said substances. The ionizing radiation can be electron beams. In an example, 2% chloral hydrate was homogeneously dissolved in the initial urea-formalin condensation product having a degree of condensation of 3--5. The solution was then irradiated by gamma rays at the dose rate of 4 x 10/sup 4/ r/hour from a /sup 60/Co source with a dose 5.0 x 10/sup 6/ roentgens. A white resinous composition was obtained. (JA)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-29-029119
- OSTI ID:
- 4314829
- Report Number(s):
- JP 7314793
- Country of Publication:
- Japan
- Language:
- Japanese
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