Environment-friendly solvent-free polyurethane for synthetic leather and manufacturing method of polyurethane

A technology for solvent-free polyurethane and a manufacturing method, applied in the field of synthetic leather, can solve environmental problems, affect the environment and other problems, and achieve the effects of easy operation, improved foaming speed, and increased toughness

CN111041843APending Publication Date: 2020-04-21福建成杰高分子材料有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-04-21
Patent Text Reader

Abstract

The invention discloses environment-friendly solvent-free polyurethane for synthetic leather. The polyurethane comprises base cloth, a water-based surface layer, a water-based adhesive layer, a foaming layer and a functional auxiliary agent, wherein the water-based surface layer comprises water-based polyurethane emulsion, a thickening agent, a water-based defoaming agent, water-based color pasteand a leveling agent; the water-based adhesive layer comprises water-based polyurethane emulsion, a water-based polyurethane crosslinking agent and water-based color paste; the foaming layer comprisesa polyol compound, white carbon black, an organometallic catalyst, hydroxyl silicone oil, fatty acid, an organic amine catalyst, a filler and toluene diisocyanate; and the functional auxiliary agentcomprises sorbitol, maltitol, oligosaccharide, glycerin saturated fatty acid ester, a coloring agent and a surfactant. The environment-friendly solvent-free polyurethane for the synthetic leather is clean and environment-friendly; the foaming layer is free of an organic solvent, so that the polyurethane is more environment-friendly and environmental protection and sustainable development are facilitated; and meanwhile, the polyurethane has the relatively good toughness.
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Description

technical field

[0001] The invention belongs to the technical field of synthetic leather, and in particular relates to an environmentally friendly solvent-free polyurethane for synthetic leather and a manufacturing method thereof. Background technique

[0002] Synthetic leather is a composite material that simulates the organization and performance of natural leather and can be used as a substitute for natural leather. Usually, non-woven fabric is used to simulate the mesh layer, and microporous polyurethane coating is used to simulate the grain layer. The front and back of the obtained synthetic leather are very similar to leather, and have a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather. , Widely used in making shoes, boots, bags and ball games.

[0003] At present, the manufacture of domestic synthetic leather mainly uses solvent-based polyurethane. Polyurethane contains a large amount of organic solvents. The con...

Examples

Embodiment 1

[0025] An environmentally friendly solvent-free polyurethane for synthetic leather, including a base cloth, a water-based surface layer, a water-based adhesive layer, a foaming layer and functional additives, wherein:

[0026] The water-based surface layer is mainly prepared by mixing the water-based polyurethane fabric slurry composed of the following parts by weight: 1000 parts of water-based polyurethane emulsion, 10 parts of thickener, 8 parts of water-based defoamer, 80 parts of water-based color paste, leveling 100 parts of dose;

[0027] The water-based adhesive layer is mainly prepared by mixing the water-based polyurethane adhesive layer slurry composed of the following parts by weight: 1000 parts of water-based polyurethane emulsion, 100 parts of water-based polyurethane crosslinking agent and 60 parts of water-based color paste;

[0028] The foam layer is mainly prepared by mixing AB material foam layer slurry composed of the following parts by weight: 1000 parts of...

Embodiment 2

[0040] An environmentally friendly solvent-free polyurethane for synthetic leather, including a base cloth, a water-based surface layer, a water-based adhesive layer, a foaming layer and functional additives, wherein:

[0041] The water-based surface layer is mainly prepared by mixing water-based polyurethane fabric slurry composed of the following parts by weight: 1000 parts of water-based polyurethane emulsion, 20 parts of thickener, 16 parts of water-based defoamer, 100 parts of water-based color paste, leveling 200 doses;

[0042] The water-based adhesive layer is mainly prepared by mixing the water-based polyurethane adhesive layer slurry composed of the following parts by weight: 1000 parts of water-based polyurethane emulsion, 120 parts of water-based polyurethane crosslinking agent and 80 parts of water-based color paste;

[0043] The foam layer is mainly prepared by mixing the AB material foam layer slurry composed of the following parts by weight: 1000 parts of polyo...

Embodiment 3

[0055] An environmentally friendly solvent-free polyurethane for synthetic leather, including a base cloth, a water-based surface layer, a water-based adhesive layer, a foaming layer and functional additives, wherein:

[0056]The water-based surface layer is mainly prepared by mixing the water-based polyurethane fabric slurry composed of the following parts by weight: 1000 parts of water-based polyurethane emulsion, 15 parts of thickener, 12 parts of water-based defoamer, 90 parts of water-based color paste, leveling 150 doses.

[0057] The water-based adhesive layer is mainly prepared by mixing the water-based polyurethane adhesive layer slurry composed of the following parts by weight: 1000 parts of water-based polyurethane emulsion, 110 parts of water-based polyurethane crosslinking agent and 70 parts of water-based color paste.

[0058] The foam layer is mainly prepared by mixing the foam layer slurry composed of the following parts by weight: 1000 parts of polyol compound...