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US 4,307,206 AGranted
Urea-formaldehyde resin adhesive
AssigneesOshika Shinko Co., Ltd., Mitsuo Higuchi, Isao Sakata
InventorsMitsuo Higuchi, Isao Sakata
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Abstract
A urea-formaldehyde resin adhesive comprising a powder of a substance having the property of gradually reacting with an acid and thus consuming the acid.
Claims6
A urea-formaldehyde resin adhesive containing a sufficient amount of a powder of an acid reacting substance to react with substantially all acid in said resin adhesive as it forms during curing of said adhesive, said powder being selected from the group consisting of
- (i) a powder of an alkali glass having a composition of the formula
- (X.sub.2 O).sub.x (YO).sub.y (SiO.sub.2)(B.sub.2 O.sub.3).sub.z (Al.sub.2 O.sub.3).sub.n
- wherein X represents an alkali metal, Y represents an alkaline earth metal, x and y each independently represent a a number of from 0.05 to 0.5, z represents a number of from 0 to 0.5, and n represents a number of from 0 to 0.2, and
- (ii) microcapsules containing a powder of an alkaline substance.
1 more element
Dependencies are inferred from the claim text.