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Synthetic leather of organosilicon composite polyurethane and preparation method thereof

A composite polyurethane and silicone technology, which is applied in the field of synthetic leather manufacturing, can solve problems such as large pinholes, hydrolysis resistance, salt spray resistance, and affect appearance, and achieve low VOCs emissions, soft and plump feel, and outstanding hydrolysis resistance. Effect

Active Publication Date: 2021-12-07
江西赛欧特科新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a substitute for natural leather, polyurethane synthetic leather has experienced decades of development, from the initial commercialization of simple products coated on the base fabric, to the foaming bass process that appeared later, and then to the latest microfiber process of imitation leather , the products are constantly updated; however, due to the defects of the polyurethane material itself, problems such as hydrolysis resistance, salt spray resistance, flame retardancy, and VOCs release of polyurethane-related synthetic leather products emerge in endlessly.
The solvent-free organic silicon synthetic leather that has appeared in recent years has solved the above problems very well, but it also has disadvantages. It is difficult to foam silicone materials, and it is impossible to form a uniform and delicate bass structure of polyurethane. Therefore, the "skin" of synthetic leather "sense" performance is not perfect
Secondly, the mechanical properties of silicone materials are relatively low, and the pinholes are relatively large during the sewing process, which affects the appearance

Method used

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  • Synthetic leather of organosilicon composite polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The synthetic leather of organic silicon compound polyurethane of this embodiment, it is made up of two layers of materials from top to bottom, is respectively organic silicon surface layer, polyurethane bass;

[0034] The silicone surface layer is composed of the following raw materials in parts by weight: 100 parts of vinyl-terminated polydimethylsiloxane (viscosity: 5000mpa.s, vinyl content: 0.16%), methylphenyl silicon 15 parts of resin (molecular weight: 4000), 3 parts of trimethyl-terminated hydrogen-containing polysiloxane (hydrogen content: 0.5%, viscosity: 500mpa.s), fumed silica (specific table: 200m 2 / g) 20 parts, tetramethylcyclotetrasiloxane and allyl glycidyl ether addition compound (hydrogen content: 0.32%) 2 parts, color paste 3 parts, platinum catalyst (isopropanol ethanol solution, 5000ppm) 1 part, 1-ethynyl-1-cyclohexanol 0.3 part, the molar ratio of active hydrogen and vinyl in the formula is: 3.6.

[0035] The production method of the synthetic le...

Embodiment 2

[0037] In this embodiment, the synthetic leather of organosilicon composite polyurethane is composed of two layers of materials from top to bottom, which are respectively organosilicon surface layer and polyurethane bass.

[0038] The silicone surface layer is composed of the following raw materials in parts by weight: 100 parts of vinyl-terminated polydimethylsiloxane (viscosity: 10000mpa.s, vinyl content: 0.13%), vinylphenyl silicon 30 parts of resin (molecular weight: 4000, vinyl content: 2.5%), 5 parts of trimethyl-terminated hydrogen-containing polysiloxane (hydrogen content: 1.0%, viscosity: 30mpa.s), fumed silica (ratio Table: 200m 2 / g) 20 parts, addition compound of tetramethylcyclotetrasiloxane and allyl glycidyl ether (hydrogen content: 0.32%) 1.5 parts, color paste 3 parts, platinum catalyst (isopropanol ethanol solution, 5000ppm) 1 part, 1-ethynyl-1-cyclohexanol 0.3 part, the molar ratio of active hydrogen and vinyl in the formula is: 1.68.

[0039] The producti...

Embodiment 3

[0041] The synthetic leather of organic silicon compound polyurethane of this embodiment, it is made up of two layers of materials from top to bottom, is respectively organic silicon surface layer, polyurethane bass;

[0042] The silicone surface layer is composed of the following raw materials in parts by weight: 100 parts of vinyl-terminated polydimethylsiloxane (viscosity: 5000mpa.s, vinyl content: 0.16%), methylphenyl silicon 26 parts of resin (molecular weight: 4000), 4 parts of trimethyl-terminated hydrogen-containing polysiloxane (hydrogen content: 0.5%, viscosity: 500mpa.s), fumed silica (specific table: 200m 2 / g) 20 parts, tetramethylcyclotetrasiloxane and allyl glycidyl ether addition compound (hydrogen content: 0.32%) 2 parts, color paste 3 parts, platinum catalyst (isopropanol ethanol solution, 5000ppm) 1 part, 1-ethynyl-1-cyclohexanol 0.3 part, the molar ratio of active hydrogen and vinyl in the formula is: 4.45.

[0043] The preparation method of this embodimen...

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Abstract

The invention discloses a synthetic leather of organosilicon composite polyurethane, which is composed of two layers of materials, which are an organosilicon surface layer and a polyurethane base from top to bottom; the organosilicon surface layer contains the following raw materials in parts by weight: ethylene 100 parts of base polysiloxane, 1-40 parts of phenyl silicone resin, 1-15 parts of hydrogen-containing polysiloxane, 1-50 parts of filler, 0.1-10 parts of platinum catalyst. The silicone composite polyurethane synthetic leather of this application has good interlayer bonding, and has soft and plump hand feeling, outstanding hydrolysis resistance, salt spray resistance, flame retardancy, low VOCs emission and extremely small pinholes and other properties. At the same time, the invention also discloses a method for preparing the synthetic leather of the organosilicon composite polyurethane.

Description

technical field [0001] The invention relates to the technical field of synthetic leather manufacture, in particular to a synthetic leather of organosilicon composite polyurethane and a preparation method thereof. Background technique [0002] As a substitute for natural leather, polyurethane synthetic leather has experienced decades of development, from the initial commercialization of simple products coated on the base fabric, to the foaming bass process that appeared later, and then to the latest microfiber process of imitation leather , The products are constantly updated; however, due to the defects of the polyurethane material itself, problems such as hydrolysis resistance, salt spray resistance, flame retardancy, and VOCs release of polyurethane-related synthetic leather products emerge in an endless stream. The solvent-free organic silicon synthetic leather that has appeared in recent years has solved the above problems very well, but it also has disadvantages. It is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/40B32B27/12B32B5/02B32B29/00B32B29/02B32B7/06B32B38/00C08L83/07C08L83/04C08L83/05C08K7/26C08J5/18
CPCB32B5/02B32B5/18B32B5/245B32B7/06B32B29/00B32B29/007B32B29/02B32B38/00B32B2038/0076B32B2255/12B32B2255/26B32B2266/0278B32B2307/3065B32B2317/12C08J5/18C08J2383/07C08J2483/04C08J2483/05C08K7/26
Inventor 范德文李江群
Owner 江西赛欧特科新材料有限公司
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