Storage stable melamine-urea-formaldehyde resins and applications thereof
AssigneeHexion Specialty Chemicals, Inc.
InventorsByung Young No, William K. Motter, David M. Harmon
Life of this patent
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Abstract
Melamine-urea-formaldehyde resins may be prepared using processes including a first cook stage, a second cook stage, and a final addition wherein: the molar ratio of formaldehyde to urea and melamine (F:U+M) in the first cook stage is from about 2.0 to about 5.0; and the molar ratio of formaldehyde to urea and melamine (F:U+M) in the second cook stage is from about 1.5 to 3.0; and the molar ratio of formaldehyde to urea and melamine (F:U+M) in the final addition from about 0.4 to 0.70.
Claims20
A process for preparing a melamine-urea-formaldehyde resin comprising a first cook stage, a second cook stage, and a final addition wherein:
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the first cook stage is from about 2.0 to about 5.0;
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the second cook stage is from about 1.5 to 3.0;
- and
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the final addition is from about 0.4 to 0.7.
A melamine-urea-formaldehyde resin prepared using a method comprising a first cook stage, a second cook stage, and a final addition wherein:
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the first cook stage is from about 2.0 to about 5.0;
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the second cook stage is from about 1.5 to 3.0;
- and
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the final addition is from about 0.4 to 0.7.
An article of manufacture comprising a substrate and a melamine-urea-formaldehyde resin wherein:
- the substrate is selected from the group consisting of cellulosic-particles, -strands, -fibers, -veneers, and mixtures thereof;
- the melamine-urea-formaldehyde resin functions to adhere the substrate together into the article of manufacture;
- and
- the melamine-urea-formaldehyde resin is prepared using a method comprising a first cook stage, a second cook stage, and a final addition wherein:
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the first cook stage is from about 2.0 to about 5.0;
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the second cook stage is from about 1.5 to 3.0;
- and
- the molar ratio of formaldehyde to urea and melamine (F:U+M) in the final addition is from about 0.4 to 0.7.
Dependencies are inferred from the claim text.