Topcoat

A coating film and weight technology, applied in the direction of coating, leather surface treatment, polyurea/polyurethane coating, etc., to achieve the effect of proper slip resistance and prevention of friction sound

Inactive Publication Date: 2010-12-08
MIDORI HOKUYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the artificial leather to be targeted is a resin sheet, which is different from natural leather having a soft feel and a coated film with improved softness and smooth touch in terms of hardness, etc., and cannot be used as it is to suppress or Countermeasures to prevent fricative noise, even if applied, are not as effective as that

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0381] About the formation of the primer layer

[0382] (1) An undercoat layer is formed on the surface of a natural leather substrate (with dermabrasion processing). The steps are the following examples.

[0383] The primer layer is the lowest layer of the coating layer, and smooths the unevenness on the leather surface to prepare a layer that stably forms a layer on the upper part. When forming this layer, a composition composed of resin, pigment, auxiliary agent, touch agent, leveling agent and water is applied to the surface of the leather.

[0384] The ratio of resin, pigment and auxiliary agent constituting the solid content is 60:15:25 (total 100%, weight ratio). The resin uses a two-component polyurethane resin. As the pigment, the pigment of the color to be colored is used. Additives include surfactants, thickeners, regulators, matting agents, anti-blocking agents and so on.

[0385] The ratio of resin, pigment, auxiliary agent, touch agent and leveling agent to water is ...

Embodiment 2

[0433] It was the same as in Example 1 until the formation of the primer layer.

[0434] At 40g / m 2 The ratio of coating is made by spraying with a two-component aliphatic polyurethane resin (number average molecular weight: 25000, viscosity 1500mPa·s (25°C)) with a solid content of 35% by weight and 8% by weight based on solid content Two-component aliphatic urethane-acrylic resin, 18% by weight of polyurethane matting agent based on solid content, 26% by weight of crosslinking agent isocyanate based on solid content, and 5% by weight of solid silica particles And a composition for forming a natural leather coating film (solid content to water: 23% by weight to 77% by weight) composed of a silicone touch agent (above solid content) and water at a solid content of 8% by weight.

[0435] Forced to send hot air at 40°C to 50°C to dry it for cross-linking treatment. On the surface of the cow leather is formed a two-component aliphatic polyurethane resin with a solid content of 35% by...

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Abstract

This invention provides a natural leather having a coating film as a topcoat layer that can suppress and prevent the occurrence of an uncomfortable squeak noise and, at the same time, has softer feeling, soft and smooth feeling, and slime feeling, a composition for the formation of a coating film on a natural leather, and a process for producing a natural leather. The natural leather comprises, as a topcoat layer, a coating film comprising 48 to 55% by weight of a two-component aliphatic polyurethane, 3 to 7% by weight of fine particles of silica, 23 to 37% by weight of a crosslinking agent, and 7 to 13% by weight of a silicone touch agent (the total of the components being 100% by weight), wherein, in the coating film as the topcoat layer, the two-component aliphatic polyurethane contains 12 to 25% by weight, based on the solid content, of a polyurethane resin matting agent, or wherein, in the coating film as the topcoat layer, the two-component aliphatic polyurethane is contained in an amount of 51 to 55% by weight based on the solid content and further contains 6 to 10% by weight, based on the solid content, of a two-component aliphatic polyurethane / acryl emulsion.

Description

Technical field [0001] The present invention relates to a top coating, which can reduce and inhibit the friction sound generated in natural leather, and at the same time has softness, softness, smooth touch and slippery feeling. Background technique [0002] The process of manufacturing leather consists of a process of neutralization, retanning, dyeing, and fatliquoring after a preparation operation and subsequent tanning process, and a coating film forming process as a finishing operation. [0003] The coating film formation process of the finishing operation is to form a three-layer coating film consisting of a base coat, a colored coat and a top coat on the natural leather that has undergone retanning, dyeing and fatliquoring processes. [0004] The top coating is an important process to give the leather abrasion resistance and softness while giving it the unique color and feel of the leather. [0005] In order to form the coating film, aniline coating is performed to form the coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C11/00
CPCC09D175/04C14C11/006Y10T428/31558C08L2666/20
Inventor 小川正彦村形美和
Owner MIDORI HOKUYO CO LTD
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