Environment-friendly powdery urea-formaldehyde resin adhesive

• Main Author: LI CHENPU
• Format: Patent
• Language: Chinese; English
• Published: 30.03.2018
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; DYES; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; POLYSACCHARIDES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS AS ADHESIVES; WORKING-UP

The invention discloses an environment-friendly powdery urea-formaldehyde resin adhesive. The environment-friendly powdery urea-formaldehyde resin adhesive is prepared from the following components inparts by weight: 120 to 140 parts of starch, 23 to 33 parts of formaldehyde, 20 to 24 parts of urea, 3 to 5 parts of hydrogen peroxide, 3 to 5 parts of sodium hydroxide, 0.8 to 1 part of formic acid,0.6 to 1 part of ammonia water, 30 to 40 parts of UF resin, 18 to 24 parts of nano-copper oxide and 5 to 10 parts of dispersion liquid; the invention also discloses a preparation method of the environment-friendly powdery urea-formaldehyde resin adhesive: the nano-copper oxide is added into the nano-copper oxide dispersion liquid and uniformly dispersed, and then mixed with the oxidized starch and a UF resin glue solution, and the mixed solution is heated in a reaction kettle to obtain a gelatinous mixture A, the mixture A finally is subjected to spray drying and centrifugation to obtain thepowdery urea-formaldehyde r