摘要:
The invention relates to a process for the preparation of copolymers containing acid monomer structural units and polyether macromonomer structural units, which is carried out in a continuous mode of operation in a reactor which has α) a body B rotating about an axis of rotation and having a reaction surface, β) a metering system and γ) a device for irradiating the reaction surface, i) the components of a starting reaction composition being applied individually and/or as a mixture with the aid of the metering system in a thin film on an inner region of the reaction surface of the rotating body B so that the thin film flows over the reaction surface of the rotating body B to an outer region of the reaction surface of the rotating body B, the thin film on the reaction surface being electromagnetically irradiated by means of the device for the irradiation of the reaction surface, ii) the thin film leaving the reaction surface as a reaction composition which has copolymer containing acid monomer structural units and polyether macromonomer structural units and iii) the reaction composition being collected after leaving the reaction surface, an acid monomer, a polyether macromonomer and a photoinitiator being present as components of the starting reaction composition.
摘要:
The invention relates to a copolymer comprising i) 3 to 40 mol % of an isoprenolpolyether derivative structural unit α ii) 3 to 40 mol % of a vinyloxypolyether derivative structural unit β and iii) 35 to 93 mol % of an acid structural unit γ, the structural units of the copolymer which belong to the vinyloxypolyether derivative structural unit β having longer side chains than the structural units which belong to the isoprenolpolyether derivative structural unit α.
摘要:
The invention relates to a process for the preparation of silylated polyurethanes and/or polyureas, comprising the steps: a) application of a component β) containing isocyanate and of a component α) containing polyol and/or polyamine to at least one surface of body A, which surface rotates about an axis of rotation and has a temperature between 60 and 400° C., and b) reaction of the reaction product of β) isocyanate and α) polyol and/or polyamine with a silylating agent.
摘要:
The invention relates to a continuous process for the preparation of polyurethanes/polyureas, in which the components of a starting reaction composition are applied individually and/or as a mixture in a thin film to an inner region of a hot surface of a rotating body A so that the thin film flows over the hot surface of the rotating body A to an outer region of the hot surface of the rotating body A, the thin film leaves the hot surface as polyurethane/polyurea-containing reaction composition and, after leaving the hot surface, the reaction composition is abruptly cooled, a polyisocyanate component and a polyol/polyamine component being present as components of the starting reaction composition, the temperature of the hot surface being 70 to 400° C. and the abrupt cooling of the reaction composition being at least 30° C.
摘要:
A siloxane mixture where the siloxanes carry aminoalkyl and alkoxy groups and, where appropriate, hydrocarbon groups and also where appropriate, hydroxyl groups.
摘要:
A composition which comprises a mixture of water-soluble, amino-functional silicon compounds which are essentially free from alkoxy groups, water, optionally a content of alcohol and optionally a content of acid, the composition comprising silicon compounds of the general formula I: NH2[CH2)2NH]x(CH2)3SiO1.5 (I) in which x is 0, 1 or 2, and of the general formula II: (SiO1.5(CH2)3[NH(CH2)2]yNH[(CH2)2NH]x(CH2)3Si)1.5 (II) in which y and z are 0, 1 or 2 and are identical or different. The compositions are obtainable by mixing corresponding aminoalkoxy silanes, hydrolyzing the mixture and removing the hydrolysis alcohol formed as a result. The invention furthermore relates to a process for the preparation of the compositions and to their use in a wide variety of applications.
摘要:
The invention relates to the use of (1) a liquid functional organylorganyloxysilane bound to a carrier, or of a liquid (co)condensate derived from a functional organylorganyloxysilane and bound to a carrier for preparing cable compounds which comprise (2) a thermoplastic base polymer having polar functional groups and (3) a reinforcing or extending mineral filler.
摘要:
The present invention provides an aqueous alcoholic fluoroalkyl functional group containing organopolysiloxane composition, which includes organopolysiloxanes of formula I: RO{Si(A)(CH3)z(OR)1−zO}a{Si(B)(R2)y(OR)1−yO}b{Si(C)(CH3)O}c{Si(D)(OR)O}dR.(HX)e (I) wherein A, B, C, D, R, R2, X, z, y, a, b, c, d and e are defined in the claims. The present invention also provides methods for making the fluoroalkyl functional group containing organopolysiloxane composition as well as methods of using same.
摘要:
The present invention relates to a process for neutralizing and reducing the residual halogen content in alkoxysilanes and alkoxysilane-based compositions, which includes treating an alkoxysilane having a residual content of acidic halide, or a corresponding alkoxysilane-based composition, with metallic magnesium in the presence of an alcohol and separating off the resulting solids.
摘要:
Organopolysiloxane containing compositions are prepared by mixing an organopolysiloxane containing an aminoalkyl group, an organopolysiloxane containing a fluoroalkyl group, and optionally, organopolysiloxanes containing alkyl groups, together with water, or a water/acid mixture, or a water/acid/alcohol mixture, where the mixture is adjusted to have a pH in the range of 1-8, then removing the alcohol already present or formed during reaction.