wherein either of A and B represents a methyl group and the rest represents a hydrogen atom, which comprises oxidizing a dimethyldecanedial represented by the general formula (I)
wherein either of A and B represents a methyl group and the rest represents a hydrogen atom. The present invention provides a dimethyldecanedial represented by the general formula (I). Furthermore, the present invention provides a process for producing a dimethyldecanedial represented by the general formula (I), comprising hydroformylating a diolefin represented by the general formula (III)
wherein either of A and B represents a methyl group and the The dimethyldecanedial of the present invention is useful as a raw material of production of the dimethyldecanedioic acid represented by the general formula (II). Furthermore, the polyester diol containing the dimethyldecanedioic acid as a dicarboxylic acid component, shows excellent resistance to hydrolysis and is useful as a raw material for producing high-performance polyurethanes.
摘要:
Provided are a leather-like sheet fabricated by infiltrating an aqueous resin dispersion (A) into a fibrous substrate, which satisfies a requirement (I) that the aqueous resin dispersion (A) comprises essentially a main resin (a) stabilized with a surfactant, a polymer (b) having a polyoxyethylene group in its side chains, and a surfactant (c), a requirement (II) that the main resin (a) comprises a urethane resin (a1) and/or a urethane-acrylic composite resin(a2), and the resin skeleton contains from 1 to 10 mmols of a carboxyl group per 100 g of the resin, a requirement (III) that the polymer (b) is obtained through polymerization of a polyoxyethylene group-having ethylenic unsaturated monomer (b1) and any other ethylenic unsaturated monomer (b2) in a ratio by mass (b1)/(b2) = 60/40 to 100/0, and a requirement (IV) that the percentage, % by mass (α) of the polyoxyethylene group in the polymer (b) and the number of mols (β) of the amino group per gram of the polymer (b) satisfy 35 ≤ α + β × 20000 ≤ 60; and an industrial advantageous method for producing the sheet. The leather-like sheet has a good feel and good physical properties.
摘要:
The suede artificial leather of the present invention comprises a three-dimensional entangled body comprising a superfine fiber having a fineness of 0.2 dtex or less and an elastomeric polymer A, and satisfies the requirements (1) to (4) as specified in the specification. By meeting the requirements, the suede artificial leather has excellent color fastness to light and color development in a wide range of colors and a high quality with good suede feeling, surface touch, hand, mechanical properties and color fastness.
摘要:
The artificial leather sheet substrates of the invention comprise a united laminate structure of a nonwoven fabric layer A and a knitted or woven fabric layer B and an elastic polymer C impregnated into the united laminate structure. The nonwoven fabric layer A and the knitted or woven fabric layer B are strongly bonded to each other by entanglement. A portion of the microfine fibers constituting the knitted or woven fabric layer B are exposed to the outer surface of the nonwoven fabric layer A. Therefore, the artificial leather sheet substrates exhibit excellent mechanical properties such as resistance to tear stress. Having a high density as compared with conventional artificial leathers, the artificial leather sheet substrates have feel and densified feel similar to those of natural leathers.
摘要:
The suede artificial leather of the present invention comprises a three-dimensional entangled body comprising a superfine fiber having a fineness of 0.2 dtex or less and an elastomeric polymer A, and satisfies the requirements (1) to (4) as specified in the specification. By meeting the requirements, the suede artificial leather has excellent color fastness to light and color development in a wide range of colors and a high quality with good suede feeling, surface touch, hand, mechanical properties and color fastness.
摘要:
The artificial leather sheet substrates of the invention comprise a united laminate structure of a nonwoven fabric layer A and a knitted or woven fabric layer B and an elastic polymer C impregnated into the united laminate structure. The nonwoven fabric layer A and the knitted or woven fabric layer B are strongly bonded to each other by entanglement. A portion of the microfine fibers constituting the knitted or woven fabric layer B are exposed to the outer surface of the nonwoven fabric layer A. Therefore, the artificial leather sheet substrates exhibit excellent mechanical properties such as resistance to tear stress. Having a high density as compared with conventional artificial leathers, the artificial leather sheet substrates have feel and densified feel similar to those of natural leathers.