Method for preparing heat insulating polyurethane automotive trim leather

A technology of automotive interior and polyurethane, which is applied in textiles and papermaking, can solve problems such as difficult promotion and performance defects, and achieve good comfort and excellent heat insulation effect

Active Publication Date: 2015-11-11
江苏尚科聚合新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the automotive leather on the market is mainly PVC synthetic leather and polyurethane synthetic leather. Due to the small s...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of the heat-insulating polyurethane automotive interior leather of the present invention includes the following steps: (a) coating the water-based polyurethane dispersion on the surface of release paper, placing it at 110-120°C, and drying to obtain a surface layer; (b) The polyurethane and expansion agent are coated on the surface of the surface layer by mechanical foaming, and then baked at 110-120°C for 20-40 minutes to form a cellular foam layer; (c) bonding the base on the foam layer The cloth is then placed at 100-120°C for a curing time of 10-15 hours, and then separated and rewinded. The content of each component of the water-based polyurethane dispersion is 75-80% polyurethane resin by mass percentage. N-vinylimidazolium salt polymer 10-15%, expanding powder 3-5%, defoaming agent 1-2%, leveling agent 1-2%, nanographene 1-5%, hand-feeling agent 1-3 %, the number average molecular weight of the polyurethane resin is 1000-5000; the general fo...

Embodiment 1

[0022] This embodiment provides a method for preparing solvent-free polyurethane automotive interior leather, which includes the following steps:

[0023] (a) Coat the water-based polyurethane dispersion on the surface of the release paper, place it at 110°C, and dry to obtain a surface layer; the mass of each component in the water-based polyurethane dispersion is: polyurethane resin (number average molecular weight is 1000) 76 %, (Number average molecular weight is 1000) 15%, calcium oxide expansion agent 5%, defoamer BYK1790 1%, carboxymethyl cellulose 1%, nano graphene 1%, silok-4148 1%;

[0024] (b) Apply 100 parts of polyurethane and 5 parts of expansion agent to the surface of the surface layer by mechanical foaming, and then bake at 110°C for 40 minutes to form a porous foam layer;

[0025] (c) Laminating the base fabric on the foamed layer, then placing it at 100°C for a curing time of 15 hours, and then performing separation and winding.

Embodiment 2

[0027] This embodiment provides a method for preparing solvent-free polyurethane automotive interior leather, which includes the following steps:

[0028] (a) Coat the water-based polyurethane dispersion on the surface of the release paper, place it at 120°C, and dry to obtain a surface layer; the mass of each component in the water-based polyurethane dispersion is: polyurethane resin (number average molecular weight is 5000) 78 %, (Number average molecular weight is 5000) 10%, alunite expansion agent 3%, defoamer BYK056A is 2%, polyacrylic acid (number average molecular weight is 1000) 2%, nano graphene 2%, silok-4148 3%;

[0029] (b) Apply 100 parts of polyurethane and 10 parts of expansion agent to the surface of the surface layer by mechanical foaming, and then bake at 120°C for 20 minutes to form a porous foam layer;

[0030] (c) Laminating the base fabric on the foamed layer, then placing it at 120°C for a curing time of 10 hours, and then performing separation and winding.

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Abstract

The invention relates to a method for preparing heat insulating polyurethane automotive trim leather. The method includes the following steps that a, the surface of release paper is coated with waterborne polyurethane dispersion, the release paper is placed at the temperature of 110-120 DEG C, and a surface layer is obtained after drying; b, the surface of the surface layer is coated with polyurethane and an expanding agent through mechanical foaming, then the surface layer is placed at the temperature of 110-120 DEG C to be dried for 20-40 min, and a porous foaming layer is formed; c, base cloth is attached to the foaming layer, the foaming layer is placed at the temperature of 100-120 DEG C to be cured for 10-15 hours, then, separation and winding are conducted, and the heat insulating polyurethane automotive trim leather is obtained. The waterborne polyurethane dispersion comprises, by mass, 75-80% of polyurethane resin, 10-15% of N-vinyl imidazole onium salt polymers, 3-5% of swelling powder, 1-2% of defoaming agent, 1-2% of flatting agent, 1-5% of nano graphene and 1-3% of feeling agent. The number-average molecular weight of the polyurethane resin is 1,000-5,000. The molecular structure general formula of the N-vinyl imidazole onium salt polymers is shown in the specification, and the number-average molecular weight of the N-vinyl imidazole onium salt polymers is 1,000-5,000. A vacuum environment can be formed, and no molecule exists in the vacuum environment so that heat cannot be conducted, and the good heat insulating effect is achieved.

Description

Technical field [0001] The invention belongs to the field of polymer materials and relates to a preparation method of automobile interior leather, in particular to a preparation method of thermal insulation polyurethane automobile interior leather. Background technique [0002] The correct use of polyurethane materials can meet the high performance requirements of automobiles in terms of power, comfort, appearance, interior softening, lightweight, and service life. It is an indispensable and important material in modern automobile manufacturing. At present, the automotive leathers on the market are mainly PVC synthetic leather and polyurethane synthetic leather. The leather is only used in high-end cars due to its limited supply. Water-based polyurethane leather is not easy to promote due to its performance defects. PVC automobile leather is used to coat the fiber base fabric through PVC. It needs to add a lot of plasticizers and other additives, and finally foam at high temperat...

Claims

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Application Information

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IPC IPC(8): D06N3/14
Inventor 张晓良沈为春
Owner 江苏尚科聚合新材料有限公司
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