Reference

Fire-resistant particle boards

Fire-resistant particle boards. Kondo, Satoshi; Maku, Takamaro; Ishihara, Shigehisa (Nihon Noboban Kogyo K. K., Japan). Japan. Kokai JP 51095480 21 Aug 1976 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B29J005-00. APPLICATION: JP 75-20683 18 Feb 1975. DOCUMENT TYPE: Patent CA Section: 43 (Cellulose, Lignin, Paper, and Other Wood Products) Adhesives of formaldehyde-urea copolymer (I) [9011-05-6] or formaldehyde-melamine-urea copolymer [25036-13-9] were mixed with fireproofing agents contg. H3BO3 and NaBr or a similar compd. 7601-54-9 and 25036-13-9 are cas registry numbers of chemicals which are used as reagents here. and used to prep. particle boards. Thus, an adhesive comprised I 100, H3BO3 33.8, Na2B8O13.4H2O 3.8, and NaBr 3 parts. .

Determination of the structure of urea-formaldehyde resins of linear-branched structure by a carbon-13 NMR method

Determination of the structure of urea-formaldehyde resins of linear-branched structure by a carbon-13 NMR method. Slonim, I. Ya.; Alekseeva, S. G.; Urman, Ya. G.; Arshava, B. M.; Aksel'rod, B. Ya.; Gurman, I. M. (Nauchno-Proizvod. Ob'edin. "Plastmassy", Moscow, USSR). Vysokomol. Soedin., Ser. A, 19(4), 776-84 (Russian) 1977. CODEN: VYSAAF. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) A method was developed for detg. the structure of formaldehyde-urea copolymer (I) [9011-05-6] from 13C NMR spectra using a series of urea derivs. as model compds. for detn. of the chem. shifts. The obtained spectra-structure correlations can be used for studying the kinetics and mechanism of I formation and the influence of prepn. conditions on the structure of I. Such correlations showed that I obtained at 1:1.In this experiment, several chemicals are used like 38688-61-8 and 15499-91-9 3-2 urea-HCHO ratio and pH 4.5-8.5 underwent branching already in the first condensation stage and that the obtained product had a linear-branched structure. .