Manufacture of chipboard and a novel suitable bonding agent
AssigneeMethanol Chemie Nederland V.o.F.
InventorJan J. Hoetjer
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Abstract
An improved method for the preparation of particleboard wherein a cellulose-containing particulate material is provided with a urea formaldehyde resin bonding agent and thereafter shaped and hardened at an elevated temperature and pressure. The bonding agent used is a urea-formaldehyde resin solution additionally containing melamine in an amount of 1.0 and 10 percent by weight, relative to the total amount of resin solids. The molar ratio of formaldehyde to mole equivalents of amino groups in the bonding agent is in the range of between 0.500:1 and 0.575:1.
Claims10
In a method for the preparation of particleboard wherein a cellulose-containing particulate material is provided with a urea-formaldehyde resin bonding agent and thereafter shaped and hardened at an elevated temperature and pressure, the improvement wherein said bonding agent is a urea-formaldehyde resin solution additionally containing melamine in an amount of between 1.0 and 10 percent by weight, relative to the total amount of resin solids, wherein the molar ratio of formaldehyde to mole equivalents of amino groups is in the range of between 0.500:1 and 0.575:1.
A melamine-containing urea-formaldehyde resin solution containing between about 1 and 10 percent by weight melamine, relative to the total amount of resin solids, wherein the molar ratio of formaldehyde to mole equivalents of amino groups is in the range of between 0.500:1 and 0.575:1.
Particleboard comprised of a cellulose-containing particulate material and a urea-formaldehyde resin bonding agent wherein said bonding agent additionally contains melamine in an amount of between 1.0 and 10 percent by weight, relative to the total amount of resin solids, and wherein said bonding agent is the reaction product of formaldehyde with said urea and melamine in a molar ratio of formaldehyde to mole equivalents of amino groups in the range of between 0.500:1 and 0.575:1.
Dependencies are inferred from the claim text.