Spray-dried phenol formaldehyde resins
AssigneeBorden Chemical, Inc.
InventorsShui-Tung Chiu, Curtis Michael Shelast, Eric Kenneth Lam
Life of this patent
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Abstract
The invention relates to formulations and methods of manufacturing spray-dried phenol-formaldehyde resin that contain highly reactive phenolic compounds that include resorcinol, alkyl resorcinols, meta-amino phenol or/and phloroglucinol. The powder resin contains 0.02 to 0.09 moles of the free (unreacted) highly reactive phenolic compound per 100 parts of the solids of the dried phenol-formaldehyde resin. The powder resin composition has fast curing property and desirable shelf life for manufacturing wood composite products.
Claims27
A method for making a fast cure powder resin, the method comprising:
- preparing a liquid phenol-formaldehyde resin;
- reducing the residual formaldehyde in the liquid phenol-formaldehyde resin;
- mixing a curing accelerator with the liquid phenol-formaldehyde resin after the residual formaldehyde is reduced;
- and
- spray-drying the mixture to form a powder resin.
Dependencies are inferred from the claim text.