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

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

CN101910418AInactive Publication Date: 2010-12-08MIDORI HOKUYO CO LTD
22 Cites 7 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Topcoat
  • Topcoat
  • Topcoat

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
surface roughnessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
08 Dec 2010
Publication
CN101910418A
IPC
C14C11/00
CPC
C09D175/04; C14C11/006; Y10T428/31558; C08L2666/20
Inventors
小川正彦; 村形美和