52 results about "Cyclohexane diisocyanate" patented technology

A process for the production of polyurethane di(meth)acrylates in which a diisocyanate component, a diol component and hydroxy-C2–C4-alkyl (meth)acrylate in the molar ratio x:(x−1):2 are reacted without solvent and without subsequent purification operations, wherein x means any desired value from 2 to 5, wherein 50 to 80 mol % of the diisocyanate component is formed by 1,6-hexane diisocyanate, and 20 to 50 mol % by one or two diisocyanates, each forming at least 10 mol % of the diisocyanate component and being selected from the group consisting of toluylene diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, isophorone diisocyanate, trimethylhexane diisocyanate, cyclohexane diisocyanate, cyclohexanedimethylene diisocyanate and tetramethylenexylylene diisocyanate, wherein the mol % of the respective diisocyanates add up to 100 mol %, wherein the diol component comprises no more than four different diols, and 20 to 100 mol % of the diol component is formed by at least one linear aliphatic alpha,omega-C2–C12-diol, and 0 to 80 mol % by at least one (cyclo)aliphatic diol that is different from linear aliphatic alpha,omega-C2–C12-diols, wherein each diol of the diol component forms at least 10 mol % within the diol component, and wherein the mol % of the respective diols add up to 100 mol %.

The invention relates to a heat-resistant and high-damping polyurethane elastomer, which is prepared from the following raw materials by weight: 27.92%-33.56% of polytetramethylene glycol, 8.52%-9.03% of diphenyl-methane-diisocyanate, 26.02%-31.66% of polycaprolactone diol, 9.02%-9.70% of 1, 4-cyclohexane diisocyanate, 0.10%-0.30% of N, N'- dicyclohexylcarbodiimide, 4.91%-5.62% of neopentyl glycol, 0.06%-0.10% of dibutyltin dilaurate, 0.60%-0.90% of carbon nanotube, and 15.02%-15.45% of nano-silica, with the sum of the weight percentage of the components being 100%. The preparation method includes: weighing raw materials, preparing an acidified carbon nanotube, preparing a nano-silica dispersion solution, preparing a polyurethane elastomer prepolymer A, preparing a polyurethane elastomer prepolymer B, preparing a chain extender-carbon nanotube / neopentyl glycol composite hydroxyl component, preparing a polyurethane elastomer casting liquid, and preparing the heat-resistant and high-damping polyurethane elastomer by means of tape-casting. The method provided by the invention can solve the problem of poor heat resistance of polyurethane elastomers in the prior art, and the prepared polyurethane elastomer has high heat resistance and high damping property.

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.