Abstract: The present invention relates to a polyurethane adhesive comprising an isocyanate component A and a polyol component B where the isocyanate component A comprises at least one diisocyanate or polyisocyanate and the polyol component B comprises the alkoxylation product of a mixture of castor oil or ricinoleic acid (i), of an aromatic di- or polyol (ii), and of an OH-functional compound having aliphatically bonded OH groups and OH-functionality of from 1 to 8 (iii), and also optionally of a compound (iv), selected from the group consisting of cyclic anhydrides of dicarboxylic acids, and optionally of a compound (v) selected from the group consisting of cyclic mono- or diesters. The present invention further relates to a process for adhesive bonding with use of the polyurethane adhesive of the invention, to an item adhesive-bonded with the use of the polyurethane adhesive, and to the use of said item in the construction of wind turbines.

Abstract: The present invention relates to a polyurethane adhesive comprising an isocyanate component A and a polyol component B where the isocyanate component A comprises at least one diisocyanate or polyisocyanate and the polyol component B comprises the alkoxylation product of a mixture of castor oil or ricinoleic acid (i), of an aromatic di- or polyol (ii), and of an OH-functional compound having aliphatically bonded OH groups and OH-functionality of from 1 to 8 (iii), and also optionally of a compound (iv), selected from the group consisting of cyclic anhydrides of dicarboxylic acids, and optionally of a compound (v) selected from the group consisting of cyclic mono- or diesters. The present invention further relates to a process for adhesive bonding with use of the polyurethane adhesive of the invention, to an item adhesive-bonded with the use of the polyurethane adhesive, and to the use of said item in the construction of wind turbines.

Abstract: The invention relates to a polyol mixture which comprises as components a1) at least one fat-based polyol, a2) at least one polyetherol having a number average molecular weight of from 500 to 2000 g/mol and a3) if appropriate one or more crosslinkers having a number average molecular weight of from 90 to 400 g/mol, where x) the number average molecular weight of component a1) differs by not more than 400 g/mol from the number average molecular weight of component a2) and xi) components a1) and a2) do not differ from one another in OH functionality by more than 0.5. These polyol mixtures can be employed to produce polyurethane-based embedding compositions. The invention additionally relates to embedding compositions based on the polyol mixtures (A) described at the outset and at least one modified isocyanate (B) and to the use of the embedding compositions as potting material. The invention further relates to a process for producing the embedding compositions as described at the outset.

Abstract: The invention relates to a process for the preparation of polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), wherein a polyisocyanate a) used is at least one polyisocyanate ai) having an average functionality of greater than 2, a content of diisocyanates of not more than 2% by weight and a content of uretonimines of not more than 4% by weight, based in each case on the weight of the polyisocyanate ai).

Abstract: The present invention relates to a process for producing a polyurethane lamination resin, by mixing a) an isocyanate prepolymer based on diphenylmethane diisocyanate having a difunctionally started polyether, b) polyphenylene polymethylene polyisocyanate, c) trifunctionally started polyetherpolyol with an average molar mass of from 350 to 600 g/mol, d) a thermoactivatable capped catalyst, e) if appropriate, chain extender and/or crosslinking agent, f) if appropriate, water-absorbent substances, and g) if appropriate, other additives to give the polyurethane lamination resin. The present invention further relates to a polyurethane lamination resin, obtainable via a process of this type, and to the use of this type of polyurethane lamination resin for producing laminates, and also to skis or snowboards, comprising this type of laminate.

Abstract: The invention relates to a process for the production of a composite of a plastic and loose stones, comprising the steps a) mixing of the loose stones with the liquid starting components of the plastic in a mixer, b) discharge of this mixture from the mixer, c) curing of the plastic.

Abstract: The present invention relates to a process for producing a polyurethane lamination resin, by mixing a) an isocyanate prepolymer based on diphenylmethane diisocyanate having a difunctionally started polyether, b) polyphenylene polymethylene polyisocyanate, c) trifunctionally started polyetherpolyol with an average molar mass of from 350 to 600 g/mol, d) a thermoactivatable capped catalyst, e) if appropriate, chain extender and/or crosslinking agent, f) if appropriate, water-absorbent substances, and g) if appropriate, other additives to give the polyurethane lamination resin. The present invention further relates to a polyurethane lamination resin, obtainable via a process of this type, and to the use of this type of polyurethane lamination resin for producing laminates, and also to skis or snowboards, comprising this type of laminate.

Abstract: The invention relates to an apparatus for coastal protection, comprising at least one porous composite of stones and plastics which is fixed at a point.

Abstract: The invention relates to a polyol mixture which comprises as components a1) at least one fat-based polyol, a2) at least one polyetherol having a number average molecular weight of from 500 to 2000 g/mol and a3) if appropriate one or more crosslinkers having a number average molecular weight of from 90 to 400 g/mol, where x) the number average molecular weight of component a1) differs by not more than 400 g/mol from the number average molecular weight of component a2) and xi) components a1) and a2) do not differ from one another in OH functionality by more than 0.5. These polyol mixtures can be employed to produce polyurethane-based embedding compositions. The invention additionally relates to embedding compositions based on the polyol mixtures (A) described at the outset and at least one modified isocyanate (B) and to the use of the embedding compositions as potting material. The invention further relates to a process for producing the embedding compositions as described at the outset.

Abstract: The invention relates to polyphenylenepolymethylene polyisocyanates (B) comprising (B1) the 2-ring product of polyphenylenepolymethylene polyisocyanate (B2) the 3-ring product of polyphenylenepolymethylene polyisocyanate (B3) the 4-ring product of polyphenylenepolymethylene polyisocyanate (B4) the 5-ring product of polyphenylenepolymethylene polyisocyanate, wherein the constituents (B2), (B3) and (B4) are, at a content of (B1) of up to 55% by weight, based on the weight of (B), present in a weight ratio of (B2):(B3):(B4) of 8±4:3.5±1.8:1.2±0.9 and the component (B) comprises at least 85% by weight, based on the weight of the component (B), of the constituents (B1), (B2), (B3) and (B4).

Abstract: The invention relates to a process for the production of a composite of a plastic and loose stones, comprising the steps a) mixing of the loose stones with the liquid starting components of the plastic in a mixer, b) discharge of this mixture from the mixer, c) curing of the plastic.

Abstract: The invention relates to a process for the preparation of polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), wherein a polyisocyanate a) used is at least one polyisocyanate ai) having an average functionality of greater than 2, a content of diisocyanates of not more than 2% by weight and a content of uretonimines of not more than 4% by weight, based in each case on the weight of the polyisocyanate ai).

Abstract: Composite elements have the following layer structure: (i) from 2 to 20 mm of metal, (ii) from 10 to 300 mm of polyisocyanate polyaddition products obtainable by reacting (a) isocyanates with (b) compounds which are reactive toward isocyanates in the presence of from 1 to 50% by volume, based on the volume of the polyisocyanate polyaddition products, of at least one gas (c) and also, if desired, (d) catalysts and/or (f) auxiliaries and/or additives, (iii) from 2 to 20 mm of metal.

Abstract: Composite elements having the following layer structure: (i) 2-20 mm of metal, (ii) 10-100 mm of compact polyisocyanate polyaddition products obtainable by reacting (a) isocyanates with (b) polyether polyalcohols, if desired in the presence of (c) catalysts and/or (d) auxiliaries and/or additives, (iii) 2-20 mm of metal.

Abstract: A phase-stable polyol component comprisesA1) at least one polyether polyalcohol and/or polyether ester polyalcohol,A2) at least one polyester polyol andA3) at least one liquid flame retardant additive,where the constituents A1:A2:A3 are present in a weight ratio of 10.+-.4.5:13.+-.4:14.+-.4.5.

Abstract: Pressurized, blowing agent-containing isocyanate semiprepolymer mixtures advantageously having an isocyanate content of from 5 to 25% and based on organic polyisocyanates and alkoxylated lignin having a hydroxyl number of from 30 to 80, preferably in admixture with lignin-free polyhydroxyl compounds are used for producing single-component polyurethane foams.

Abstract: The invention relates to pressurized, blowing-agent-containing isocyanate semiprepolymer mixtures, advantageously having an isocyanate content of from 5 to 25% by weight, based on organic polyisocyanates and polyhydroxyl compounds which are used in combination with a linear, branched or cyclic, saturated or olefinically unsaturated monoalcohol having 1 to 25 carbon atoms and/or hydroxyketones, preferably .beta.-hydroxyketones, the use thereof for the production of one-component polyurethane foams by allowing the isocyanate semiprepolymer mixtures to depressurize, and a process therefor.