摘要:
Hydraulic oils containing a biodegradable base oil comprising eithera) the product of the ethoxylation and/or propoxylation of glycerol with from about 0.5 to about 3 moles of ethylene oxide and/or propylene oxide and subsequent esterification with a saturated or unsaturated C.sub.6-24 fatty acid, or mixtures thereof; orb) the product of the insertion of from about 0.5 to about 3 moles of EO and/or PO into a natural oil or fat other than castor oil.
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:
Curable compositions are disclosed, containing at least one organopolysiloxane, which contains at least one hydroxyl group and/or group which can be hydrolyzed, in aqueous dispersion, i) at least one oganopolysiloxane having a dynamic viscosity of 0.05 to 7 (measured according to Brookfield DV-II+, spindle 3, 23° C.), which is free of hydroxyl groups and/or groups which can be hydrolyzed, in aqueous dispersion, at least one cross-linking agent, at least one emulsifier, at least one cross-linking catalyst, at least one aqueous silicon-free polymer dispersion, at least one filler, and optionally water. The compositions are suitable as sealants, adhesives, or coating agents for application in the construction field, in particular in the sanitary field and in the kitchen field. They are characterized in relation to aqueous silicone preparations known up to this point by an improved adhesion spectrum, in particular on plastic substrates.
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.
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:
The preparation of polyol compounds by (a) condensing glycerine in the presence of lithium compounds; (b) continuously distilling off the water produced by the reaction; (c) optionally subjecting the oligoglycerine mixture obtained to a transesterification reaction with fatty-acid glyceride esters. Such polyol compounds are suitable for use as starting materials in the production of polymers.
摘要:
A device for use in measuring blood pressure comprises a cuff which is windable around the portion of a body and a clamp fastener for maintaining the cuff in the wound position during use. The fastener has a box shaped outer part and a box shaped inner part which is moveable therein perpendicular to the longitudinal access thereof and has slots in its end faces for receiving a pressure rod about which the cuff is looped. A sound pickup is disposed in the pressure chamber of the cuff and is connectable to a display instrument via an air tube.