摘要:
The present invention provides a novel sewing-free hot melt adhesive TPU leather and a preparation method thereof. The hot melt adhesive TPU leather comprises a release paper, a hot melt adhesive film, and a TPU film. The release paper comprises a bottom paper layer, an adhesive layer, a plastic layer, a transition layer, and a release layer; a hot melt adhesive raw material comprises polyester polyol, diisocyanate, polyether polyol, and a plurality of additives; and a TPU raw material comprises polymer polyol, 1,4-cyclohexane-diisocyanate, a chain extender, and a plurality of functional additives. According to the present invention, innovations are conducted on raw material components of the release paper, the hot melt adhesive, and the TPU film, and extrusion shaping is conducted by utilizing the hot melt adhesive with strong plasticity and the TPU thin film; and the prepared sewing-free TPU leather has the technical advantages of firm adhesion, durability, environmentally-friendly materials, no invisible harm to human body, and the like.
摘要:
A polyisocyanate modified with sulphamic acid and a mixture thereof, the preparation method thereof, and the use thereof in the production of polyurethane, especially as a cross-linking ingredient in the field of aqueous coatings and adhesives containing groups that are capable of reacting with isocyanate groups.
摘要:
Eine wäßrige Dispersion eines Polyesterpolyurethans, welches als wesentliche Aufbaukomponente 1-Methyl-2,4- und/oder -2,4-diisocyanatocyclohexan enthält, ihre Verwendung, gegebenenfalls in Kombination mit Vernetzerharzen als/oder zur Herstellung von 1- oder 2-komponentig zu verarbeitenden Beschichtungsmitteln und eine wäßrige Bindemittelkombination, bestehend im wesentlichen aus A) einer derartigen wäßrigen Dispersion und B) einer Härterkomponente, bestehend aus gegebenenfalls blockierten Polyisocyanaten und/oder aus Aminovernetzerharzen.
摘要:
On décrit de nouveaux polyesteruréthanes hydroxy- fonctionnels qui peuvent être préparés par réaction d'un polyester comportant environ 2 groupes hydroxyles par molécule et ayant un indice hydroxyle compris entre 30 et 260, avec un diisocyanate aliphatique ou cycloaliphatique de telle manière que le polesteruréthane obtenu ait un indice hydroxyle compris entre 10 et 120. On décrit également des compositions de peinture pour revêtement de supports métalliques ayant des propriétés améliorées, comprenant comme résine les polyesteruréthanes de l'invention.
摘要:
Disclosed is to prevent generation of byproducts or a deterioration in the physical properties of a polythiol composition that may be caused by active oxygen during storage thereof by way of controlling the content of active oxygen in the polythiol composition after the synthesis of the polythiol. As a result, it is possible to enhance the long-term storage stability of a polythiol composition after it has been synthesized until it is used in the polymerization reaction.