摘要:
The invention relates to a one-component, moisture-curing adhesive containing at least one polyoxyalkylene and/or poly(methyl)acrylate prepolymer having at least one hydrolyzable silane group, at least one filler, and auxiliary materials and additives, wherein the prepolymer has a molecular weight of 4,000 to 40,000 g/mol and the adhesive has a viscosity of 200 to 10,000 mPas.
摘要:
Silylated polyurethanes can be manufactured by reacting at least one polyol compound, having a molecular weight from 4000 to 20,000 dalton, with a diisocyanate, with a stoichiometric excess of the diisocyanate compound with respect to the polyol compound or compounds, with the result that a polyurethane prepolymer that is isocyanate-terminated is formed; and by subsequently reacting the polyurethane prepolymer with one or more OH-terminated silanes of formula (1) to yield a polyurethane having predominantly terminal alkoxysilyl groups. In formula (1), m is equal to 0, 1, or 2, R1 is an alkyl residue having 1 to 4 carbon atoms, R2 is an alkyl residue having 1 to 4 carbon atoms, R3 is a divalent organic residue having 1 to 12 atoms, selected from C, N, S, and/or O, in the chain, but by preference exclusively carbon atoms, R4 is a hydrogen atom or an alkyl residue having 1 to 10 carbon atoms, and R is a difunctional organic group, preferably a linear or branched alkyl group having 1 to 6 carbon atoms. The silylated polyurethanes are suitable for use in a preparation as an adhesive, sealant, or coating agent.
摘要:
Silylated polyurethanes can be manufactured by reacting at least one polyol compound, having a molecular weight from 4000 to 20,000 dalton, with a diisocyanate, with a stoichiometric excess of the diisocyanate compound with respect to the polyol compound or compounds, with the result that a polyurethane prepolymer that is isocyanate-terminated is formed; and by subsequently reacting the polyurethane prepolymer with one or more OH-terminated silanes of formula (1) to yield a polyurethane having predominantly terminal alkoxysilyl groups. In formula (1), m is equal to 0, 1, or 2, R1 is an alkyl residue having 1 to 4 carbon atoms, R2 is an alkyl residue having 1 to 4 carbon atoms, R3 is a divalent organic residue having 1 to 12 atoms, selected from C, N, S, and/or O, in the chain, but by preference exclusively carbon atoms, R4 is a hydrogen atom or an alkyl residue having 1 to 10 carbon atoms, and R is a difunctional organic group, preferably a linear or branched alkyl group having 1 to 6 carbon atoms. The silylated polyurethanes are suitable for use in a preparation as an adhesive, sealant, or coating agent.
摘要:
The invention relates to block copolymers produced by means of controlled polymerization and that have at least one block A or B comprising (meth)acrylate monomers and copolymerizable monomers, and a block P on the basis of functionalized polymers.
摘要:
The invention aims to allow a curable composition to have an extended working phase followed by a short time period in which said compound becomes fully cured. This is achieved by the provision of a curable composition comprising the following components: a) at least one polyether and/or at least one polyacrylic acid ester with at least one reactive silyl group as an end-group; b) at least one organotin compound; and c) at least one compound that does not contain any tin or silicon atoms and that has at least two functional groups. Said groups are selected from the following: carboxy, carbonyl or hydroxy groups, or nitrogen atoms that are part of a ring system with aromatic character. In addition, the invention relates to a method for producing such a composition, and to the use thereof as an adhesive, a sealant or as a coating material.
摘要:
The invention aims to allow a curable composition to have an extended working phase followed by a short time period in which said compound becomes fully cured. This is achieved by the provision of a curable composition comprising the following components: a) at least one polyether and/or at least one polyacrylic acid ester with at least one reactive silyl group as an end-group; b) at least one organotin compound; and c) at least one compound that does not contain any tin or silicon atoms and that has at least two functional groups. Said groups are selected from the following: carboxy, carbonyl or hydroxy groups, or nitrogen atoms that are part of a ring system with aromatic character. In addition, the invention relates to a method for producing such a composition, and to the use thereof as an adhesive, a sealant or as a coating material.
摘要:
The invention relates to a controlled polymerization process for preparing (meth)acrylate-based AB diblock copolymers with a B block which has a narrow monomodal molecular weight distribution, and an A block which has a broad bimodal molecular weight distribution, and to the use thereof, for example, as a binder in adhesives or sealants.
摘要:
The invention relates to a foamable mixture which contains at least one alkoxysilane-terminated prepolymer and which can be produced of a) at least one alkoxysilane that was functionalized with isocyanate groups and that can be produced of at least one hydroxyfunctional and/or aminofunctional alkoxysilane and at least one diisocyanate or polyisocyanate, and b) at least one compound that contains at least one OH group, and at least one blowing agent, characterized in that the foamable mixture has a dynamic viscosity of 100 to 25,000 mPas, preferably 500 to 10,000 mPas, at 23° C. The invention further relates to a method for producing said foamable mixture. The foamable mixtures according to the invention are suitable for sealing, insulating and mounting joints, roof surfaces, windows and doors or for filling hollow spaces.
摘要:
Silyated polyurethanes can be manufactured by (A) converting (i) at least one polyol compound A with a molecular weight of 500-20,000 Dalton, in particular 4000-10,000 Dalton, (ii) with a dihalogenide to a polyol compound B with a molecular weight of 4000-40,000 Dalton, in particular 8000-20,000 Dalton, and subsequent (B) conversion of this polyol B with one or more isocyanatosilanes of formula (1): OCN—R—Si—(R1)m(-OR2)3-m where m is 0.1 or 2, each R2 is an alkyl radical with 1 to 4 carbon atoms, each R1 is an alkyl radical with 1 to 4 carbon atoms and R is a difunctional organic pump. These silylated polyurethanes are suited to use as adhesives, sealant or coating agent in preparations containing one or more such silylated polyurethane.
摘要:
The present invention relates to silane-crosslinking curable compositions encompassing a polymer P having at least two terminal groups of the following formulas (I) and (II) -Am-K1—SiR1XY (I), -Am-K2—SiR2XY (II), and/or two polymers P1 and P2, polymer P1 having terminal groups of the following formula (I) -Am-K1—SiR1XY (I), and polymer P2 having terminal groups of the following formula (II) -Am-K2—SiR2XY (II), in which A denotes a divalent bonding group, K1, K2, mutually independently, denote a divalent aliphatic hydrocarbon group that has a main chain of 1 to 6 carbon atoms, the hydrocarbon groups K1, K2 being different, X, Y mutually independently denote a hydroxy group or a hydrolyzable group, R1, R2 mutually independently denote a hydrocarbon residue having 1 to 20 carbon atoms, and m assumes the values 0 or 1.