摘要:
Radiation-curable catalysts are obtainable by reactingA) 1 equivalent of a dihydric to hexahydric oxyalkylated C.sub.2 -C.sub.10 -alcohol withB) from 0.05 to 1 equivalent of a dibasic to tetrabasic C.sub.3 -C.sub.36 -carboxylic acid or its anhydride andC) from 0.1 to 1.5 equivalents of acrylic acid and/or methacrylic acidand reacting the excess carboxyl groups with an equivalent amount of epoxide compound, and are used in radiation-curable coating materials.
摘要:
Radiation-curable binders which are obtained by reactingA) an amine/formaldehyde condensate having a molar ratio of formaldehyde to amino groups of from 1:1 to 2:1 withB) one or more esters, having a free hydroxyl group, of acrylic acid or of methacrylic acid with polyalcohols which contain from two to four alcoholic hydroxyl groups, from 0.1 to 0.3 hydroxyl equivalent of component B) being used per methylol equivalent of component A),in the presence of a strong acid are suitable for use in coating materials.
摘要:
A process for the preparation of curable etherified aminoplast resins based on urea/aldehyde polycondensates, and the preparation of surface coating resins.Urea is first reacted with an .alpha.,.alpha.-dialkylaldehyde, as much as 50 mol % of which may be replaced by formaldehyde, in a molar ratio urea/aldehyde of about 1:2, at from 50.degree. to 120.degree. C., in the presence of an acid and in the presence or absence of an alcohol or of other organic solvents, and the 2-oxohexahydropyrimidine derivative obtained in this cyclocondensation is then condensed with formaldehyde in the presence of one or more alcohols and an acid.These aminoplast resins are useful as both acid-curable resins and as resins for baking finishes.
摘要:
A latch (1) for a top of a vehicle comprises a latching hook (3) which is disposed in a guide plate (10), preferably having a U-shaped cross-section, to be movable from a closed position into an open position on a defined path (41) via guiding means (bolt 8, pin 9). A geared motor (4) is provided for pivoting a actuation lever (15) which is connected to the latching hook (3). The connection between the latching hook (3) and the actuation lever (15) is realized through several levers (11, 12, 13) which are connected to each other in an hinged fashion. The motor-driven latch for a top with compact space-saving structure, has a latching hook with a larger radius of motion to increase the separation from the windscreen frame in the open position.
摘要:
A carrier assembly controls movement of a movable member within a mold tool to first receive a quantity of molten material, and then displace that molten material back into a mold cavity during solidification of a molded article. The moveable member moves relative to the surface of the mold cavity to compensate for local volume changes in a molded part that occur during solidification to substantially eliminate depressions and sink marks on an outer surface of a plastic injection molded part.
摘要:
A one-piece flexible coupling is integrally molded from plastic. A plurality of discs are connected by posts over small circumferential extents with slots formed over the remainder of the circumferential extent of the discs. The posts between adjacent discs are offset by 90.degree. from the previous and subsequent discs. Shafts are connected at both ends of the flexible coupling, and the flexible coupling transmit rotation between the shafts, even when they are at non-parallel angles relative to each other.
摘要:
An article for mixing a tray holder has a generally rectangular side panel having upper and lower edges and inner and outer faces, a generally rectangular roof panel projecting generally perpendicular from the inner face of the side panel along the upper edge thereof, and a generally rectangular floor panel projecting generally perpendicular from the inner face of the side panel along the lower edge thereof. These panels are formed along a plane perpendicularly to and bisecting all panels with a weakened region and the roof and floor panels have straight outer edges remote from the side panel that are complementarily shaped to opposite sides of the plane. Thus according to the invention the article can be subdivided into two complementary and interfitting pieces along the plane adn joined together to make a half-depth holder by bonding together the complementary outer edges. A full-depth holder can be made by bonding together the outer edges of two such articles. Thus it is possible with a single such article made by a single mold to make single or double-depth holders. Manufacturing costs are thereby held down.
摘要:
Flat, transparent slabs of vitreous silica of optical quality are produced by melting granular starting material in a vacuum by means of an electrical heating system. The starting material is melted while sustaining a heat flow from the top to the bottom of the crucible. The bottom of the crucible is made permeable to gases. The heat isolation power of the crucible wall increases from the bottom to the top of the crucible.
摘要:
Apparatus for intermittently turning a turbine shaft wherein a ratchet wheel is secured upon the shaft and is engaged intermittently by a to and fro movement of a ratchet arm actuated by a reciprocating drive mechanism. The ratchet arm has a combined rectilinear and pivotal movement and is provided with a device, operable in the event the ratchet wheel is put into rotation by starting up of the turbine while the ratchet arm is engaged with the ratchet wheel, for detaining the arm against a return pivotal movement towards the ratchet wheel after being hurled outwardly therefrom to a predetermined position.