摘要:
Alkoxysilane functionalized isocyanate based materials of low viscosity prepared by reacting in any possible order of addition an organic polyisocyanate with an isocyanate-reactive compound and an amino-functional alkoxysilane of formula I R-HN-R 1 -Si-(OR 2 ) 3-x (R 3 ) x (I) wherein R represents a group with electron withdrawing properties, R 1 is a linear of branched alkylene or arylene group, R 2 and R 3 are identical or different and each represent alkylene or arylene groups and x is 0, 1 or 2.
摘要:
The present invention relates to a composition comprising at least one silylated polymer and at least one polyhedral oligomeric metallo silsesquioxane. The present invention also relates to a process of curing a composition comprising a silylated polymer comprising the step of: contacting a silylated polymer with a polyhedral oligomeric metallo silsesquioxane.
摘要:
Composition comprising lignin dispersed in a polyisocyanate wherein the (d90) mean particle size of the dispersed lignin is less than 5 μm, preferably less than 2 μm, more preferably less than 1 μm and use of said composition in various polyurethane applications, in particular structural wood adhesives.
摘要:
Polyisocyanate composition for binding lignocellulosic materials comprising a methylene bridged polyphenyl polyisocyanate composition having a having a relative content of minor trifunctional isocyanate isomers of at least 17 wt% based on the total trifunctional isocyanate content.
摘要:
A moisture-activated adhesive composition comprising the reaction product of: (A) a polyisocyanate selected from (a) a blend of polymeric MDI and pure MDI and/or from (b) an isocyanate-terminated prepolymer; (B) an isocyanate-reactive component comprising at least one aliphatic tertiary amine group-containing polyol made by alkoxylation of amines or aminoalcohols, characterized in that the total ethylene oxide content by weight of the total adhesive composition is more than 2.5 %.
摘要:
A moisture-activated adhesive composition comprising the reaction product of (A) a polyisocyanate selected from (a) a blend of polymeric MDI and pure MDI and/or from (b) an isocyanate-terminated prepolymer; (B) an isocyanate-reactive component comprising at least one aliphatic tertiary amine group-containing polyol made by alkoxylation of amines or aminoalcohols characterized in that said isocyanate reactive component has a nitrogen weight average equivalent molecular weight index, herein after referred to as ZW. ZW being equal or less than 1500 whereby Formula (I) with zi: nitrogen weight average equivalent molecular weight of isocyanate reactive component i; ni: total N-atoms per isocyanate reactive component i; mwi: weight average molecular weight of isocyanate reactive component i; wti: weight of isocyanate reactive component i present; Σwti: total weight of isocyanate reactive component i present.
摘要:
The invention relates to a formulation comprising: - a first component which is formed from at least one isocyanate and at least one amino resin, wherein said amino resin is the condensation product of an aldehyde with a compound selected from the group comprising urea, melamine, benzoguanamine, glycoluril, acetoguanamine and mixtures thereof; and - a second component comprising at least one polyether, wherein said polyether is a polyether polyol which comprises at least one ethylene oxide moiety.