摘要:
Process for the production of aminoplast resins. The process entailing the addition of ureido-2-diamino-4,6-triazine-1,3,5, and optionally melamine, to aminoplast resin. Preferably the triazine is added in a proportion of at least 10% by weight. The resultant aminoplasts can be used to make panels from particles.
摘要:
New acrylic derivative of urea: monomethylolacrylamidomethyleneurea.Preparation process, according to which acrylamidomethyleneurea is reacted with formaldehyde.Application to the manufacture of additives suitable for use in aminoplastic resins.
摘要:
Precondensates of urea and formaldehyde containing monomethylolacrylamidomethyleneurea are produced from pure acrylamidomethyleneurea and urea/formaldehyde precondensate or from the starting substances used for the manufacture of acrylamidomethyleneurea with formaldehyde. They are useful additives for aminoplastic resins, which in turn may be used as glue in the manufacture of chipboard sheets.
摘要:
Urea-formaldehyde resins, particularly useful for producing particle boards having lower rates of release of formaldehyde are synthesized in several stages including a stage of further condensing a first condensate having a F/U molar ratio of 1.8-2.3 and which was condensed at a pH of between 6 and 8. The further condensing is conducted at a pH of between 6 and 8 until a cloud point with water is reached at 10.degree.-40.degree. C. making it possible to obtain resins which are reactive and stable during storage.
摘要:
New process for manufacturing urea/formaldehyde resins.New process, according to which a urea/formaldehyde precondensate containing monomethylolacrylamidomethyleneurea is added to the urea/formaldehyde resins.Applications for the gluing of wood, in aminoplastic resins.
摘要:
A process for curing aminoplast resins using a catalyst comprising a hexamethylenetetramine salt of a strong acid, resins produced according to the process, and the use of such resins in the manufacture of particle boards.