摘要:
Aqueous polymer dispersions which have a long shelf life are obtainable by dispersing a mixture of from 15 to 70% by weight of a copolymer (A) of(I) from 1.5 to 15% by weight of copolymerizable compounds of 3 to 10 carbon atoms which contain a carboxyl or carboxylic anhydride group,(II) from 65 to 98.5% by weight of C.sub.1 -C.sub.20 -alkyl acrylates or methacrylates,(III) from 0 to 20% by weight of vinylaromatics,(IV) from 0 to 20% by weight of copolymerizable carbonyl compounds and(V) from 0 to 10% by weight of further copolymerizable organic compounds not stated under (I) to (IV), and from 30to 85% by weight of a copolymer (B) of from 60 to 100% by weight of the monomers (II) and from 0 to 40% by weight of the monomers (III) to (V), with the proviso that the copolymers (A) and (B) together contain, as components, more than 65% by weight of alkyl (meth)acrylates (II) whose homopolymers have glass transition temperatures of less than 0.degree. C., and that one or more of the copolymers (A) and (B) contain the monomers (IV) as components, in water with the addition of ammonia and a polyhydrazide (C), and the said dispersions are used as pressure sensitive adhesives and as adhesives for laminated films.
摘要:
Radiation-curable contact adhesives containing (A) oligomeric or polymeric reaction products of (a) diisocyanates, (b) polyesterols and/or polyetherols, (c) optionally C.sub.2 -C.sub.50 -diols, (d) C.sub.2 -C.sub.20 -hydroxyalkyl (meth)acrylates and (e) monohydroxyalkylcarboxylic acids in defined weight proportions and (e) monovinyl compounds in an amount of 2-90% by weight, based on A+B, produce contact adhesive layers of particularly high surface tackiness and particularly high cohesion.
摘要:
Compounds of the general formulae ##STR1## where R is versatyl and R' is unsubstituted or alkyl-substituted straight-chain alkylene of 4 or 5 carbon atoms can be prepared by reacting the versatic ester of 1,3-dihydroxy-propyl-2 acrylate and/or of 2,3-dihydroxy-propyl-1 acrylate with equimolar amounts of saturated or monoolefinically unsaturated cyclic dicarboxylic anhydrides having 4 or 5 carbon atoms and an oxygen atom in the ring at from 50.degree. to 150.degree. C. in the presence of customary esterification catalysts and can be used as reactive diluents in radiation-curable contact adhesives.
摘要:
Synthetic resins are obtainable by chemically bonding one or more compounds of the general formula I ##STR1## where R.sup.1 is --OH, --NH.sub.2, ##STR2## --NHR.sup.3 or ##STR3## R.sup.2 is --H, --CH.sub.3 or --C.sub.2 H.sub.5, R.sup.3 is --C.sub.m H.sub.2m+1, where m is from 1 to 6, R.sup.4 is --H or --CH.sub.3 and n is from 1 to 12, via the oxygen or nitrogen atom of R.sup.1 to one or more polymers A which consist ofa) from 50 to 100% by weight of one or more esters of acrylic or methacrylic acid with monohydric alcohols of 1 to 18 carbon atoms or a mixture of these esters (monomers a) andb) from 0 to 50% by weight of other copolymerizable monomers (monomers b) in polymerized form,in amounts such that the synthetic resin contains from 0.01 to 1 mole of double bonds per kg of polymer A.After exposure to ultraviolet light or to electrons, these synthetic resins are suitable as contact adhesives.
摘要翻译:合成树脂可以通过化学键合一种或多种通式I(*化学结构*)(I)的化合物,其中R1是-OH,-NH2,(*化学结构*)-NHR 3或(*化学结构*)R2 是-H,-CH 3或-C 2 H 5,R 3是-C m H 2m + 1,其中m是1至6,R 4是-H或-CH 3,n是1至12,经由R 1的氧或氮原子至一个 或更多的聚合物A,其由a至50重量%至100重量%的一种或多种丙烯酸或甲基丙烯酸酯与1至18个碳原子的一元醇或这些酯(单体a)和b)的混合物从0 至50重量%的聚合形式的其它可共聚单体(单体b),其量使得合成树脂每kg聚合物A含有0.01至1摩尔双键。在暴露于紫外光或电子之后,这些合成的 树脂适合作为接触粘合剂。
摘要:
The invention relates to UV-crosslinkable copolymers built up fromA) from 99.5 to 75% by weight of olefinically unsaturated monomers,B) from 0.5 to 25% by weight of unsaturated compounds of the formula I ##STR1## and C) from 0.01 to 10% by weight of copolymerizable, olefinically unsaturated acetophenone and/or benzophenone derivatives containing no phenyl group having a free hydroxyl group in the ortho-position to the carbonyl group, whereX is O, S or NR.sup.1 andR is unsubstituted or substituted C.sub.2 - to C.sub.6 -alkylene, andR.sup.1 is C.sub.1 - to C.sub.8 -alkyl or phenyl.The copolymers according to the invention are suitable, after crosslinking, as coating agents, impregnants or adhesives and in particular as contact adhesives.
摘要:
A machine tool for processing tooth formations of workpieces, includes a rotary holder which can be rotated about a main axis A, two workpiece spindles which are arranged on the rotary holder, with the workpiece spindles having spindle axes (Sa, Sb) which are orientated parallel with the main axis A, in particular with the workpiece spindles being arranged symmetrically about the main axis A, and a tool holder for a tool for processing a workpiece on one of the workpiece spindles, is characterised in that the main axis A of the rotary holder extends horizontally. With this machine tool, contamination of the rotary holder and tool spindles by removed chips can be reduced and the structural complexity for a relative feed movement of the tool with respect to the workpiece parallel with the spindle axes can be reduced.
摘要:
The invention describes a supply module for stackable pallets, on which workpieces and/or tools can be disposed. On the supply module there are disposed several stacking bays arranged in succession in a row, at each of which a stack of pallets can be mounted in holding means, such as hooks. At least one transport module can be driven along the row beneath the stacking bays, the transport module carrying a lifting device with it. A pallet or a stack of pallets can be gripped from below by the lifting device. The supply module according to the invention can manage a large number of stacking bays, and hence pallets, in a cost-effective manner, even large stack heights being possible.
摘要:
The invention pertains to an assembly cell (1; 21, 22) that is suitable for the assembly of modules (55) from work pieces (35) on pallets (33; 42, 43; 54; 68, 69) and features several pallet stations (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h), in which pallets can be positioned, wherein at least some of the pallet stations are realized in the form of assembly stations for carrying out assembly work on the modules on the pallets., and with at least one transport device for transporting the pallets between the pallet stations. The invention is characterized in that the transport device is realized in the form of a triaxial module (2; 23, 24) that is able to transport an individual pallet from any pallet station within the assembly cell to any other unoccupied pallet station within the assembly cell. The invention therefore makes available an assembly cell, by means of which modules can be assembled independently of the spatial arrangement of the assembly stations, wherein said assembly cell requires fewer pallets and makes it possible to realize a faster transport of the pallets from assembly station to assembly station.
摘要:
The invention relates to a method, in particular a turning method, for producing a rotationally symmetrical surface on a rotating workpiece (1), wherein a cutting edge (3) is inserted into the workpiece (1) many times. During each insertion (41), a new contour portion (11; 34), also referred to as a groove, is formed. The insertion positions lie so closely together that the resulting contour (7) generated on the workpiece (1) consists exclusively of adjacent residual contours or residual grooves (11′) which have arisen from the new contour portions or grooves (11; 34). Any interim contour portions (24) which have formed between the insertion positions during repositioning of the cutting edge (3) are removed again during the next insertion (41). The resulting rotationally symmetrical surface is twist-free. The method can be implemented using conventional lathes.
摘要:
The invention relates to a method, in particular a turning method, for producing a rotationally symmetrical surface on a rotating workpiece (1), wherein a cutting edge (3) is inserted into the workpiece (1) many times. During each insertion (41), a new contour portion (11; 34), also referred to as a groove, is formed. The insertion positions lie so closely together that the resulting contour (7) generated on the workpiece (1) consists exclusively of adjacent residual contours or residual grooves (11′) which have arisen from the new contour portions or grooves (11; 34). Any interim contour portions (24) which have formed between the insertion positions during repositioning of the cutting edge (3) are removed again during the next insertion (41). The resulting rotationally symmetrical surface is twist-free. The method can be implemented using conventional lathes.