Formaldehyde scavenger for urea-formaldehyde glue and technique for producing the same

Abstract

The invention relates to formaldehyde scavenger which belongs to novel aldehyde remover used in urea-formaldehyde glue; the formaldehyde scavenger essentially solves the problems that the urea-formaldehyde glue adhesive materials reduce the release of formaldehyde during the production and use processes, which belongs to the aldehyde reducing technology during the urea-formaldehyde glue use process; the formaldehyde scavenger is characterized by comprising compositive polyphosphate, monadic organic amine, binary organic amine, phenolic compounds, lignin-containing compounds, hydrazine compounds, urea and products thereof produced by the reaction with acid, sulfite and the like, being added with water according to the weight ratio of the materials. The synthesis and composite technology of the formaldehyde scavenger is a special method to prepare formaldehyde scavenger for man-made board. The formaldehyde scavenger has the advantages of easy and even mixture with glue, good aldehyde removing effectiveness without changing the plate, no impact on the strength and other physical and chemical properties of the plate when being added simultaneously with a curing agent when adjusting the glue, convenient use, storage and transportation, cheap price and the like, and is a novel aldehyde remover of environmental protection, high efficiency and excellent aldehyde removing performance.

Description

technical field

[0001] The formaldehyde scavenger for urea-formaldehyde glue and its production process mainly solve the problem of reducing the release of formaldehyde during the hot pressing process of materials bonded by urea-formaldehyde glue, and belong to the formaldehyde-reducing technology in the use of urea-formaldehyde glue. Background technique

[0002] Urea-formaldehyde glue is the most important glue for plywood such as particleboard, density board, and fiberboard, but the board produced by this type of glue has the disadvantage of releasing formaldehyde. Since the 1980s, many foreign countries have imposed strict formaldehyde emission restrictions on plywood production. my country also promulgated 10 mandatory national standards for interior decoration materials and building materials in 2002. All board manufacturers have to adopt Various measures are used to achieve this goal. Such as improving the production process of glue, adding formaldehyde scavenger, pos...