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US 2010/0071829 A1Published application
Accelerated Curing Adhesive For Wood Composites
OwnerJay Tanzer, Jianwen Niinventors
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Abstract
An adhesive system for, inter alia, the manufacturing of wood composites, which includes a MDI adhesive and a formaldehyde-containing resin accelerator.
Claims20
A method of manufacturing a wood composite comprising the steps of:
- a) providing an isocyanate adhesive comprising at least one isocyanate polymer;
- b) providing a formaldehyde-containing resin accelerator;
- c) applying the isocyanate adhesive and the formaldehyde-containing resin to a lignocellulosic material to form an adhesive lignocellulosic mixture;
- d) applying an elevated temperature to the adhesive lignocellulosic mixture to form the wood composite wherein the temperature is less than the temperature for the same method without the formaldehyde-containing resin accelerator.
1 more element
A method of manufacturing a wood composite comprising the steps of:
- a) creating an adhesive composition comprising a MDI adhesive of at least 60% by weight of the adhesive composition and a formaldehyde-containing resin accelerator of at most 40% by weight of the adhesive composition;
- b) combining the adhesive composition with lignocellulosic material to form an adhesive lignocellulosic mixture;
- c) applying an elevated temperature and an elevated pressure to the adhesive lignocellulosic mixture to form the wood composite.
A wood composite comprising a lignocellulosic material and a cured adhesive, wherein the cured adhesive comprises a linked polymer that is a reaction product of a MDI adhesive accelerated by a formaldehyde-containing resin accelerator.
An adhesive for a wood composite comprising:
- a MDI adhesive comprising at least one isocyanate polymer;
- and
- a formaldehyde-containing resin accelerator wherein the formaldehyde-containing resin accelerator provides for faster curing of the MDI adhesive than for the reaction without the formaldehyde-containing resin accelerator.
Dependencies are inferred from the claim text.