摘要:
Methods are described herein for converting carbocationically terminated polymers to anionically terminated polymers. These methods comprise: (a) providing a carbocationically terminated polymeric moiety; (b) reacting the carbocationically terminated polymeric moiety with a heterocyclic compound of the formula where —X— is selected from —S—, —O—, —NH— and —NR—, and where R is an alkyl group or an aryl group, thereby providing an end-capped polymeric moiety; and (c) reacting the end-capped polymeric moiety with an organolithium compound to yield an anionically terminated polymeric moiety. Also described are block copolymers in which a first polymer block comprising cationically polymerized monomers is linked to a second polymer block comprising anionically polymerized monomers by a group, as well as a polymer in which a polymer block comprising cationically polymerized monomers is linked to a halogenated silane residue or a carbosilane residue by a group.
摘要:
A sensor system and method for detecting particles, in particular dirt particles or water droplets on a vehicle windscreen, comprising an optical sensor (3). The sensor (3) operates on the basis of light transit time and receives light signals (S) that are emitted by an emitter element and that are at least partially reflected, wherein the emitter element and the sensor (3) are located and aligned on the exterior of the vehicle, on or in the vicinity of a tailgate, hatchback or trunk lid (2) of said vehicle (1) in such a way that particles on the tailgate, hatchback or trunk lid (2) can be detected by means of the sensor (3) by sensing the part of light signals (S) emitted by the emitter element that is backscattered by the particles.
摘要:
A switch (1) for converting mechanically generated movements into electrical switching signals, consisting of a cover (2) and a carrier plate (3) at a distance from one another and fixedly connected together, a switching element (4) that can be moved to a limited extent relative to the cover (2) and be actuated by one or more pushbuttons (5) facing the carrier plate (3), by means of which the particular adjustment movements of the switching element (4) can be measured and are converted into switching signals, the movement direction of the switching element (4) being perceived as the movement direction of an object, in particular a vehicle seat, and the switch (1) can be operated in at least six different movement directions.
摘要:
The invention relates to a reciprocating piston pump for delivering a liquid. The pump includes a solenoid with an actuator and an outlet port. A check valve with a seat body is assigned to the outlet port for keeping a return flow of the liquid out of the reciprocating piston pump. The seat body bears an impact damping face at a front face facing away from a valve seat of the check valve, and the valve seat of the check valve and the impact damping face are made from the same elastomer material.
摘要:
A sensor system and method for detecting particles, in particular dirt particles or water droplets on a vehicle windscreen, comprising an optical sensor (3). The sensor (3) operates on the basis of light transit time and receives light signals (S) that are emitted by an emitter element and that are at least partially reflected, wherein the emitter element and the sensor (3) are located and aligned on the exterior of the vehicle, on or in the vicinity of a tail gate tailgate, hatchback or trunk lid (2) of said vehicle (1) in such a way that particles on the tailgate, hatchback or trunk lid (2) can be detected by means of the sensor (3) by sensing the part of light signals (S) emitted by the emitter element that is backscattered by the particles.
摘要:
The invention relates to a polymer comprising 50-100% by weight, with regard to the weight of the polymers, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R represents hydrogen or methyl; R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR′, wherein R′ represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The polymer is a star polymer with 3 to 21 arms and at least 3 of the arms consist of at least 40% by weight, with regard to the weight of the arms, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR′, wherein R′ represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The invention also relates to oil formulations comprising the inventive polymers. The inventive polymers having a high thickening action can be used, in particular, as viscosity modifiers, pour point depressants, dispersing agents and/or friction modifiers.
摘要:
Polyacrylates based on alkyl acrylates or alkyl alkylacrylates or mixtures thereof as monomers are prepared in the presence of an initiator composition containing an alkali metal ester enolate and an organic aluminum compound or a mixture thereof, by a process in which an ester which differs from the monomers is present in the initiator composition, the carbon atom .alpha. to the ester group having no acidic proton.
摘要:
(EN) The invention relates to a polymer comprising 50-100% by weight, with regard to the weight of the polymers, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R represents hydrogen or methyl; R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR′, wherein R′ represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The polymer is a star polymer with 3 to 21 arms and at least 3 of the arms consist of at least 40% by weight, with regard to the weight of the arms, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR′, wherein R′ represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The invention also relates to oil formulations comprising the inventive polymers. The inventive polymers having a high thickening action can be used, in particular, as viscosity modifiers, pour point depressants, dispersing agents and/or friction modifiers.
摘要:
The invention relates to the use of a multilayered, opaque, biaxially oriented polyolefin film of a vacuole-containing base layer and at least one inner cover layer comprising at least 30-95% by weight of a copolymer and/or terpolymer I having a seal initiation temperature I of 70-105° C. and 5 to 70% by weight of an incompatible polyethylene, each of the specifications in percent by weight being based on the weight of the inner cover layer and the inner cover layer having a seal initiation temperature II of 80 to 110° C.
摘要:
A switch (1) for converting mechanically generated movements into electrical switching signals, consisting of a cover (2) and a carrier plate (3) at a distance from one another and fixedly connected together, a switching element (4) that can be moved to a limited extent relative to the cover (2) and be actuated by one or more pushbuttons (5) facing the carrier plate (3), by means of which the particular adjustment movements of the switching element (4) can be measured and are converted into switching signals, the movement direction of the switching element (4) should be being perceived as the movement direction of an object, in particular a vehicle seat, and the switch (1) can be operated in at least six different movement directions.