摘要:
An air-drying alkyd resin comprising (I) at least one .alpha.,.beta.-olefinically unsaturated dicarboxylic acid unit or a mixture thereof with (I') a polycarboxylic acid unit being free from polymerizable olefinic and acetylenic bonds, said units bound as an ester, (II) at least one trihydric alcohol unit or a combination thereof with a minor amount of a dihydric alcohol unit, (III) from 10 to 35% by weight (referred to the total alkyd resin) of cyclopentadiene units and (IV) at least one predominantly aliphatic monocarboxylic acid unit, wherein the amount by weight of monocarboxylic acid units is at least as large as the total amount of polycarboxylic acid units, the latter being calculated as anhydride and a process of preparation said resin.
摘要:
In the production of a printing stencil, for example a rotary printing stencil for textile printing, for the purpose of transferring a pattern stored in an electronic memory, liquid is applied to the lateral surface of the printing stencil as it rotates. A nozzle which supplies the liquid is driven by pattern data belonging to the pattern. Pattern data situated earlier or later in the circumferential direction of the stencil cylinder are read out as a function of at least one deviation between the actual and desired positions of the lateral surface which respect to the pattern data belonging to the desired position, in order to prevent distortion of the pattern owing to the deviation.
摘要:
A modified air-drying alkyd resin based on a polycarboxylic acid, a polyhydric alcohol, and a monocarboxylic acid having at least 7 carbon atoms, and additionally at least one chemically incorporated copolymer of (A) dicyclopentadiene or an alkyl derivative thereof and (B) at least one unsaturated compound selected from the group consisting of (B1) an olefinically unsaturated carboxylic acid and a derivative thereof, and (B2) an olefinically unsaturated alcohol, a coating composition containing said alkyd resin and an article coated with said coating composition.
摘要:
In the production of a screen-printing stencil, a covering layer is applied to only some regions of a fine-mesh screen in accordance with a desired printing pattern. In this case, for the application of the covering layer, the screen is closed on the rear side by a support, so that the passage of covering liquid through the screen is prevented, which leads to qualitatively high-grade patterns.
摘要:
A method and system for producing a rotating, clamped stencil includes producing a pattern in the surface of the stencil by means of an engraver by moving an engraving head of the engraver relative to the stencil. The engraving head is switched on and off by a control computer in coincidence with a predefined bit sequence which is generated from a byte sequence taken from a color file. The color file describes a pattern and is stored in a large-scale memory of a server. The server sends the color file containing the byte sequence relating to the engraving of the stencil to a further computer or to the control computer. This further computer or control computer creates the bit sequence assigned to this stencil. The result is a saving in computing time and memory capacity for the server. The bit sequence is created by the further computer or control computer only when the engraving of a stencil is actually to be carried out. The production of the bit sequence can also be carried out "on the fly. "
摘要:
The invention relates to a transmission (10) for transmitting a torque generated by a drive engine (74) to at least one drive axle (76, 78) of a vehicle (72). The vehicle (72) is in particular an agricultural or industrial utility vehicle. The transmission (10) comprises at least one main transmission unit (12) which can function independently. The main transmission unit (12) has a gear transmission and/or an auxiliary-range transmission. It is possible for an option transmission module (14) to be adapted onto the main transmission unit (12). It is possible by means of the option transmission module (14) to expand the functionality of the transmission (10). It is intended to specify and further develop a transmission (10) with which it is possible to provide, in particular from an economical aspect, a diverse range of transmissions for vehicles (72) of a series, and in which the installation space between the drive engine (74) and the main transmission unit (12) can be better utilized. According to the invention, the main transmission unit (12) and the option transmission module (14) are designed in such a way that the installation space provided for the transmission (10) is substantially unchanged even if the option transmission module (14) is adapted onto the main transmission unit (12). The present invention also relates to a main transmission unit (12), an option transmission module (14), a transmission type series, an agricultural or industrial utility vehicle (72) and a method for producing a transmission (10).
摘要:
Aqueous dispersions of carboxyl-containing polyvinyl acetals which contain no emulsifiers, no readily volatile organic solvents and no nonvolatile plasticizers, preparable by a) reacting hydroxyl-containing polyvinyl acetals with polycarboxylic anhydrides in the melt or in high-boiling solvents, b) neutralizing at least some of the carboxylic acid groups present in the resulting modified polyvinyl acetals, and c) dispersing the resulting salt of the modified polyvinyl acetals in water, are suitable as coating compositions for paper and textiles and as binders for paints and varnishes.
摘要:
A hot melt adhesive having a good thermal stability under load, based on a copolymer of a predominant proportion of acrylates or methacrylates, a minor proportion of acrylic or methacrylic acid amides and further based on acrylic or methacrylic acid compounds, characterized in that the copolymer comprises(a) 85 to 95% by weight of alkyl acrylates and/or methacrylates with 1 to 12 carbon atoms in the alkyl radical,(b) 3 to 10% by weight of acrylamide and/or methacrylamide,(c) 0.2 to 5% by weight of one or more olefinically unsaturated mono- or dicarboxylic acids with up to 5 carbon atoms,the sum of components (a) to (c) amounting to 100%, at a and a process for preparing a multi-layer article, containing said adhesives.
摘要:
A process for the preparation of copolymers containing hydroxyl groups by radical reaction of(A) 10 to 30% by weight of at least one glycidyl ester containing 12 to 14 carbon atoms, of an aliphatic saturated monocarboxylic acid with a tertiary or quaternary .alpha.-carbon atom; and(B) 90 to 70% by weight of at least two unsaturated copolymerisable monomers, at least one of which contains at least one carboxyl group,wherein component (A) is introduced first to a reaction zone and is then reacted at a temperature of at least 140.degree. C. with component (B) and a radical initiator, the component (B) containing a monomer having carboxyl groups,wherein for the preparation of low-viscosity copolymers component (A) is reacted at 140 to 200.degree. C. by substance polymerisation until a degree of reaction of at least 95% is achieved, the component (B) containing at least 3.3% by weight of the monomer having carboxyl groups, and an article coated with a product of said process.
摘要:
In the production of a screen-printing stencil, a covering layer is applied to only some regions of a fine-mesh screen in accordance with a desired printing pattern. In this case, for the application of the covering layer, the screen is closed on the rear side by a support, so that the passage of covering liquid through the screen is prevented, which leads to qualitatively high-grade patterns.