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FOERFARANDE Foer POLYKONDENSATION AV VATTENHALTIGA UREA ELLER Melamine-formaldehyde -HARTSBINDEMEDEL SAMT VID DETTA FOERFARANDE ANVAENDBART BINDETILLSATTSAEMNE.
FOERFARANDE Foer POLYKONDENSATION AV VATTENHALTIGA UREA ELLER Melamine-formaldehyde -HARTSBINDEMEDEL SAMT VID DETTA FOERFARANDE ANVAENDBART BINDETILLSATTSAEMNE.
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机译:水凝尿素或三聚氰胺-甲酰甲醛硬粘合剂的缩合程序,以及该程序的添加剂。
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摘要
A reaction catalyst for the polycondensation of amino resins used for bonding water-penetrable cellulosic particles is disclosed. Said catalyst, if used in combination with a known catalyst, increases the rate of polycondensation of the resin while at the same time allowing the use of lower amounts of resin solids without imparting any loss in bonding strength. The catalyst comprises a concentrated aqueous solution of a mixture of organic and inorganic components, the organic components being formaldehyde and urea or a non resinous condensation product of formaldehyde and urea, and the inorganic component being a water-soluable alkali metal halide.
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