Manufacture of chipboard

Details Manufacture of chipboard Manufacture of chipboard

1980-09-03

1982-12-07

Briggs, Sr., Wilbert J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 13, 524 15, 524 16, 524 35, 525509, 528 68, C08L 102, C08L 6124, C08L 6134

Patent

active

043628273

ABSTRACT:
The invention concerns the production of particle board with a very substantially lowered formaldehyde emission as well as suitable binding agents. According to the invention the binding agent used in the production of the board is a combination of a polyisocyanate with a aminoplast resin containing 0.25 to 0.625 moles of formaldehyde per mole equivalent of aminogroups. The particle boards thus obtained possess satisfactory mechanical properties and a strongly reduced formaldehyde emission.

REFERENCES:
patent: 2349756 (1944-05-01), Pratt
patent: 3268467 (1966-08-01), Rye et al.
patent: 3870665 (1975-03-01), Diehr et al.
patent: 4282119 (1981-08-01), Tinkelenberg et al.

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