Aqueous adhesive composition comprising a ithermosetting resin
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsDavid Doisneau, Clement Michoud
Life of this patent
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Abstract
An aqueous adhesive composition comprises a thermosetting resin based on: at least one aromatic compound bearing at least two functions, one of these functions being a hydroxymethyl function and the other being an aldehyde function or a hydroxymethyl function, the aromatic compound comprising at least one aromatic ring; and at least aromatic polyphenol comprising at least one aromatic ring bearing at least two hydroxyl functions in the meta position relative to one another, the two positions ortho to at least one of the hydroxyl functions being unsubstituted. Such an adhesive composition may especially be used to join elements made of wood; it constitutes an advantageous alternative to the use of a formaldehyde-based phenolic resin adhesive.
Claims21
An aqueous adhesive composition comprising a thermosetting resin based on:
- (A1) at least one aromatic compound comprising at least one aromatic ring bearing at least two functions, one of these functions being a hydroxymethyl function and the other being an aldehyde function or a hydroxymethyl function;
- and
- (A2) at least one aromatic polyphenol comprising:
- at least one aromatic ring bearing three hydroxyl functions in the meta position relative to one another, wherein, for at least one of the hydroxyl functions, the two positions ortho to the hydroxyl functions are unsubstituted;
- or
- several aromatic rings, at least two of these each bearing at least two hydroxyl functions in the meta position relative to one another, wherein, for at least one of the hydroxyl functions of at least one aromatic ring, the two positions ortho to the hydroxyl function are unsubstituted.
An aqueous adhesive solution comprising a pre-condensed thermosetting resin based on:
- (A1) at least one aromatic compound comprising at least one aromatic ring bearing at least two functions, one of these functions being a hydroxymethyl function and the other being an aldehyde function or a hydroxymethyl function;
- and
- (A2) at least one aromatic polyphenol comprising:
- at least one aromatic ring bearing three hydroxyl functions in the meta position relative to one another, wherein, for at least one of the hydroxyl functions, the two positions ortho to the hydroxyl function are unsubstituted, or
- several aromatic rings, at least two of these each bearing at least two hydroxyl functions in the meta position relative to one another, wherein, for at least one of the hydroxyl functions of at least one aromatic ring, the two positions ortho to the hydroxyl function are unsubstituted.
Dependencies are inferred from the claim text.