A short-cycle hot-press inorganic adhesive and its preparation method and application

Abstract

The invention discloses a short cycle hot press inorganic adhesive, which comprises the following components by weight: 40-60 parts of aluminum tripolyphosphate, 60-80 parts of sodium silicate, 10-15parts of phosphoric acid, 3-8 parts of a wetting agent, 6-8 parts of a toughening agent, 5-8 parts of rosin powder, 10-20 parts of bisphenol A cyanate ester resin, and 20-50 parts of water. The invention also provides a preparation method and application of the short cycle hot press inorganic adhesive. The inorganic adhesive contains the pre-locking agent bisphenol A cyanate ester resin and the initial adhesive rosin. When the inorganic adhesive is used for artificial boards, the hot press time is shorter, and the hot press time can be shortened by 50% or more. In addition, the artificial boards prepared with the inorganic adhesive have no emission of free formaldehyde or other toxic gases.

Description

technical field [0001] The invention belongs to the field of adhesives, and in particular relates to an inorganic adhesive used for wood-based panels, a preparation method and application thereof. Background technique [0002] my country produces more than 1.5 billion tons of agricultural and forestry processing residues every year, including about 900 million tons of agricultural straw. Most of the agricultural straw is burned or used as fuel, with low added value. It also aggravates smog and brings environmental pollution problems. my country's annual wood consumption is about 600 million cubic meters, while the annual supply is about 300 million cubic meters, and the dependence on foreign countries exceeds 50%. The use of agricultural and forestry processing residues to expand the production scale of wood-based panels can effectively alleviate the shortage of wood resources in my country. [0003] At present, aldehyde adhesives are mainly used in the production of wood-b...

AI Technical Summary

Problems solved by technology

[0003] At present, aldehyde adhesives are mainly used in the production of wood-based panels in my country. Wood-based panels have technical bottlenecks such as high release of free formaldehyde, poor water resistance and fire resistance.

Although the wood-based panels produced with inorganic adhesives have the advantages of no free formaldehyde release, good waterproof and fireproof performance, but when inorganic adhesives are used in the cold-pressing production process of wood-based panels, a large number of clamping frames and backing plates are required. Large investment, long pressurized maintenance time and low production efficiency

In addition, when inorganic adhesives are used in the hot-pressing production process of wood-based panels, the hot-pressing cycle is long, and water loss is serious during the hot-pressing process, which will adversely affect the strength of wood-based panels.