Curable composition containing a silane polyurethane-Iota

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News > Dynamic industry > Curable composition containing a silane polyurethane

Curable composition containing a silane polyurethane

By one of the following methods can manufacturing silylated polyurethane, to at least a molecular weight of 4000 to 20000 daltons polyol compounds react with diisocyanate, one or more polyols stoichiometric compounds excessive, resulting in the formation of isocyanate terminated polyurethane prepolymer homopolymer with respect to diisocyanate compounds; then the polyurethane pre polymer and a or a plurality of type (1) Oh terminated reaction of silane, mainly has the terminal alkoxy silyl polyurethane. In type (1), m equals 0, 1, or 2, R1 is an alkyl group having 4 to 4 carbon atoms, R2 is a 1 valence organic group having 12 to two C, N and / or O from, R4 and / or R3. R is an alkyl group having 1 to 10 carbon atoms, preferably 1 to 6 carbon atoms. The silylated polyurethane adhesive, suitable for use as a sealant or coating agent products.

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