초록 ▼

Room-temperature curable isocyanate terminated polyurethane polymers whose terminal isocyanate groups have been reacted with a silane monomer having at least one dialkoxy silane group and an organo-functional group with at least one active hydrogen. The polymers crosslink to produce elastomeric poly

Room-temperature curable isocyanate terminated polyurethane polymers whose terminal isocyanate groups have been reacted with a silane monomer having at least one dialkoxy silane group and an organo-functional group with at least one active hydrogen. The polymers crosslink to produce elastomeric polymers with improved elongation and flexibility.

대표청구항 ▼

A process for producing vulcanizable, dihydrocarbyloxysilyl-terminated polyurethane polymers having terminal end-blocking units of the formula: [Figure] wherein R is C1-C16 alkyl or C6-C12 aryl; R1 is C1-C4 alkyl; R2 is C2-C18 alkylene or C6-C18 arylene; and Z is －O－, －S－or －NR3, wherein R3 is hydro

A process for producing vulcanizable, dihydrocarbyloxysilyl-terminated polyurethane polymers having terminal end-blocking units of the formula: [Figure] wherein R is C1-C16 alkyl or C6-C12 aryl; R1 is C1-C4 alkyl; R2 is C2-C18 alkylene or C6-C18 arylene; and Z is －O－, －S－or －NR3, wherein R3 is hydrogen, [Figure] or C1-C16 alkyl, aminoalkyl or diaminoalkyl, with the proviso that when Z is －O－, R2 must be C4-C18 alkylene or C6-C18 arylene, which comprises reacting: (a) the －NCO terminal groups of an isocyanate-terminated polyurethane prepolymer with (b) at least a stoichiometric amount of silane monomer of the formula: [Figure] wherein R, R1, R2 and Z are as defined above.