The invention discloses a
polymerization reaction type formaldehyde catching agent, which is prepared from 5 to 30 parts of
tannin, 20 to 70 parts of water, 0.1 to 5 parts of basic catalysts, 5 to 50parts of
aldehyde substances and 3 to 20 parts of polyamino compounds. The invention also discloses a preparation method of the
polymerization reaction type formaldehyde catching agent. Through addition polycondensation, water-soluble polymers using
tannin water-resistant structures are main bodies and comprising a great number of amino groups and hydroxymethyls are formed; amino groups and activereaction hollow sites in the polymers can achieve the goal of capturing
formaldehyde through reaction with formaldehyde; in addition, through
polymerization reaction, water-resistant
tannin structureunits are embedded into
urea formaldehyde and modified
urea formaldehyde resin; the
water resistance and the bonding intensity of the
urea formaldehyde and the modified
urea formaldehyde resin can beimproved; the resin
curing time is shortened; no adverse influence is caused on the active period of the resin. The polymerization
reaction type formaldehyde catching agent can be added into the ureaformaldehyde and the modified
urea formaldehyde bonding agents to reduce the free formaldehyde in the
resin adhesive; the polymerization reaction type formaldehyde catching agent can be sprayed and smeared onto the surface of artificial board products to directly reduce the formaldehyde release quantity of the artificial boards.