Method of manufacturing bonded products of cellulose or...

Details Method of manufacturing bonded products of cellulose or... Method of manufacturing bonded products of cellulose or...

C - Chemistry, Metallurgy

08

J

204/91.76

C08J 3/28 (2006.01)

Patent

CA 1113883

Abstract In a method of manufacturing bonded products, comprised completely or partially of cellulose or a cellulose deri- vative, such as saw dust, wood chips, paper or vegetable fibres, a condensation resin between an aldehyde, preferably formaldehyde, and urea, melamine or a phenol type is used as an adhesive. The product is irradiated to at most 5 Mrad with ionising radiation. Then the material will undergo a certain cross-linking. Residual quantities of uncured ad- hesive substances are reduced at the same time. The radiation dose is adjusted so that residual quantities of aldehyde in the material will be reduced. Preferably, also the residu- al quantity of formaldehyde in the material is reduced. By adding additives containing olefinic, acrylic or comparable groups the extent to which cross-linking takes place is increased.

306801

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