TH12807B - Finishing material with abrasion resistance - Google Patents

Abstract

The finishing material of this invention consists of a substrate and an abrasion-resistant coating applied to it. It is characterized by the abrasion-resistant coating being composed of spherical particles (A) with an average particle diameter of 3 to 50 micrometers and a binder (B) made of crosslinked resin. It is characterized by the content of spherical particles (A) ranging from 5 percent to 50 percent by weight of the total content of components (A) and (B). It is characterized by the hardness of the spherical particles (A) being higher than the hardness of the binder (B). It is characterized by the average particle diameter d (micrometers) of the spherical particles (A) satisfying the following inequality (1): 0.3 t ≤ d ≤ 3.0 t (1), where ''t'' is the average thickness (micrometers) of the coating layer. Thus, the relationship between the average thickness of the coating layer and the average particle diameter of the spherical particles is strictly controlled in this invention, enabling the preparation of the finishing material. It successfully possesses excellent properties in both flexibility and abrasion resistance (scratching).

Claims (8)

1. A finishing material consisting of a substrate and an abrasion-resistant coating applied to the substrate. The abrasion-resistant coating consists of spherical particles (A) with an average particle diameter of 3 to 50 micrometers and a binder (B) consisting of cross-linked resins. The amount of spherical particles (A) is between 5 percent and 50 percent by weight of the total amount of components (A) and (B). The average particle hardness d (micrometers) of the spherical particles (A) follows the following inequality (1): 0.3 t less than or equal to d less than or equal to 3.0 t (1), where ''t'' is the average thickness (micrometers) of the coating layer and the spherical particles (A) consist of inorganic spherical particles with a Knoop hardness of 1,300 kg/mm² or greater. 2. Decorative material as defined in Claim 1, in which spherical particles (A) consist of spherical alumina particles. 3. Decorative materials as defined in Claim 1, in which spherical particles (A) contain 90 percent by weight or higher alumina oxide. 4. Finishing materials as defined in Claim 1, where the binder (B) consists of a heat-curing resin. 5. Finishing materials as defined in Claim 1, whereby the binder (B) consists of a radiation-cured ionized resin. 6. The finishing material as defined in Requisition 1, in which the binder (B) contains at least 10 percent by weight of polyetherurethane (methyl)acrylate substituted by the general formula (2) as follows (CH2 = C(R2)-COOCH2CH2-OCONH-X-NHCOO-[-CH9R2)-(CH2)N-O-] m- CONH-X-NHCOO-CH2CH2OCOC(R1) = CH2 (2), where R1 and R2, however, represent hydrogen or methyl groups, X is a diisocyanate radical, n is an integer from 1 to 3, and m is an integer from 6 to 60. 7. Ocular decorative materials as defined in Reservience 1, where the average molecular weight of the crosslinked molecules of the binder (B) after heat or ionizing radiation curing is in the range of 180 to 1,000. 8. A finishing material as defined in Claim 1, in which a mixture of spherical particles (A), a binder (B), and one or more solvents capable of dissolving the binder (B) with a boiling point at normal pressure of 70 to 150 °C in an amount of 40 percent by weight or less by the total volume of components (A) and (B), is used as a coating mixture for the form of a coating layer.