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 controlled polymerization method for producing ABA-triblock copolymers on the basis of (meth)acrylate with A-blocks which have a narrow, monomodal molecular weight distribution and a B-block which has a bimodal molecular weight distribution, and to the use thereof as binders in glues and sealing materials
摘要:
The invention relates to a method for producing cross-linkable formulations. In a first step of the method, at least one α,ω-difunctional organic polymer of formula (1) X-A-X (1) is converted into organyloxysilyl-terminated polymers P1, using organofunctional silanes of formula (2) Y—R—Si—(R1)m(—OR2)3m (2), in the presence of catalysts (A) selected from the group consisting of potassium, iron, indium, zinc, bismuth and copper compounds. In said formulae, R is a bivalent, optionally substituted hydrocarbon group which comprises between 1 and 12 carbon atoms and can be interrupted with heteroatoms, R1 and R2 are the same or different, monovalent, optionally substituted hydrocarbon groups which comprise between 1 and 12 carbon atoms and can be interrupted with heteroatoms, A is bivalent, optionally substituted hydrocarbon group which comprises at least 6 carbon atoms and can be interrupted with heteroatoms, m is equal to 0, 1 or 2, X is a hydroxyl group and Y is an isocyanate group, or X is an isocyanate group and Y is a hydroxyl group or a primary or secondary amino group. In a second step, the polymers P1 obtained in the first step are mixed with a silane condensation catalyst (B) selected from the group consisting of compounds of elements of the third main group and/or fourth secondary group and heterocyclic organic amines, amine complexes of the element compounds, or the mixtures thereof. Optionally, said mixture is mixed with other substances (C). The formulations do not contain organic tin compounds, and are suitable for using as adhesives, sealants, or coating agents.
摘要:
A solvent-free and anhydrous hardenable composition that contains at least one polymer A. Polymer A being obtainable by reacting a polyether with at least one ethylenically unsaturated silane in the presence of a radical starter, the ethylenically unsaturated silane carrying at least one hydrolyzable group on the silicon atom. The composition provides low viscosity prior to curing along with good elasticity after curing and a broad adhesion spectrum in a solvent-free and water-free hardenable composition. Also methods for producing the composition and use of the composition as an adhesive, sealant, or coating agent.
摘要:
The invention relates to a cross-linkable composition containing 10-50% by weight of silane-group terminated polymers with a number average molecular weight of between 3,000 and 30,000 g/mol, 0.5 to 20% by weight of (meth)acrylate block copolymers of type A(BA)n, where n=1 to 5 and said copolymers contain at least two hydrolysable silane groups, 85 to 40% by weight of fillers and auxiliary agents, the sum of the constituents totalling 100%. The invention is characterised in that the (meth)acrylate block copolymers have a number average molecular weight of between 5,000 and 100,000 g/mol and that the silane groups are contained in at least one block A or B and said groups are not terminal in the polymer chain.
摘要:
The invention relates to a silylated polyurethane that is manufactured by reacting at least one polyether compound having an OH number per DIN 53783 between 3 and 20 mg KOH/g, made up of at least two polyoxyalkylene blocks A and B, the number of carbon atoms in the alkylene units of blocks A and B differing by at least 1, with one or more isocyanatosilanes of formula (I): OCN—R—Si—(R1)m(—OR2)3-m, in which m is 0, 1, or 2, each R2 is an alkyl residue having 1 to 4 carbon atoms, each R1 is an alkyl residue having 1 to 4 carbon atoms, and R is a difunctional organic group, in order to cap the hydroxyl groups of the prepolymer with the isocyanatosilane, thereby forming a silylated polyurethane that comprises alkoxysilyl groups as reactive end groups. The silylated polyurethanes that are described are suitable for the manufacture of adhesive, sealant, or coating-agent preparations having good mechanical properties.
摘要:
A storage-stable, smooth-feeling, non-comedogenic fatty acid ester mixture of 2-ethylhexanol and fatty acids comprising 2-ethylhexyl fatty acid esters, wherein the aggregate amount of C12 and C14 2-ethylhexyl fatty acid esters is 85% or more of the mixture, based on the total weight of all fatty acid esters in the mixture, which mixtures are useful in or as an oil component of a cosmetic or pharmaceutical preparation.
摘要:
Esters of 2-propylheptanol with linear or branched, saturated or unsaturated C5-C36 carboxylic acids and C4-C36 dicarboxylic acids, compositions comprising these esters, and to the use of esters of 2-propylheptanol with linear or branched, saturated or unsaturated C5-C36-carboxylic acids and/or C4-C36-dicarboxylic acids in cosmetic and/or topical pharmaceutical preparations.