摘要:
In a device for dosing two-component products of a predetermined mixing ratio, the dispensing accuracy has been improved in conjunction with simple design and uncomplicated operation. According to the invention, two chambers are provided which are put under pressure by means of two pistons that are displaced simultaneously in opposite directions from a starting point. A mixer means is arranged at the closed longitudinal end of a first chamber, while the closed longitudinal end of the other chamber is connected to the mixer means over a component line that leads centrally through the first chamber.
摘要:
The present invention relates to one component polyurethane foam compositions which comprise mixtures of prepolymers of a polyol and an excess of isocyanate; the usual adjuvants for polyurethane foams, an expanding gas under pressure and a polysiloxane compound with antifoam activity stored in a valved pressure vessel.
摘要:
A process for producing in situ foams based on alkali metal silicates characterized in that an aqueous alkali metal silicate solution on the one hand and a hardener solution on the other hand are accomodated in separate pressurized containers A and B, prior to use the hardener solution in container B is added to and mixed with the silicate solution in container A in the presence of a suitable emulsifier for foam formation and a propellent gas liquid under high pressure between 0.degree. and 50.degree. C., and, on actuation of the discharge valve of container A, an alkali metal silicate foam is discharged. The alkali metal silicate foams formed are distinguished by non-inflammability, high temperature stability and good heat-insulating properties and are used as a filling, construction and insulating material or the like in the building industry.
摘要:
A polyurethane composition containing a polyurethane prepolymer, a foam stabilizer, a diluent, and optional auxiliary agents, useful as an adhesive for building insulation and/or decorative facing on a variety of substrates.
摘要:
A method of providing a foam accoustical insulation, thermal insulation, and/or moisture-barrier, in which a polyurethane prepolymer composition is applied to a substrate in situ and then expanded and cured using water pre-applied to the substrate, ambient atmospheric moisture, and/or added atmospheric moisture.
摘要:
Foaming, moisture-curing prepolymers containing at least one group of formula I: —X-A-Si(Z)n(OR)3-n (I), and at least one of formula II: —N(R1)—C(O)—Y—R2 (II), and adhesive or assembly foams produced therefrom.
摘要:
A one-pack polyurethane adhesive containing a polyisocyanate prepolymer and at least one aminoether polyol, having a molar ratio of ether groups to amino nitrogen in the aminopolyether polyol of 7 to 30.
摘要:
A process for the production of compounds which contain at least one urea group and at least one silyl goup. The process involves reacting a compound containing at least one amino group and a carbamate compound. The compounds produced by this process are useful as surface coating compositions, foams, and adhesives.
摘要:
A one-pack polyurethane adhesive containing a polyisocyanate prepolymer and at least one aminoether polyol, having a molar ratio of ether groups to amino nitrogen in the aminopolyether polyol of 7 to 30.
摘要:
The invention relates to two-component polyurethane adhesive preparations in which the resin component is an oleochemical polyol. The oleochemical polyols used are ring-opened products of the reaction of epoxidized fatty alcohols, fatty acid esters (particularly triglycerides) or fatty acid amides with alcohols. The oleochemical polyols may be varied within wide limits in regard to their OH-functionality and so formulated with the hardener polyisocyanate components that the adhesives satisfy the relevant requirements. Reaction products of epoxidized triglycerides with monohydric alcohols are a particularly effective substitute for castor oil.