Coating compositions having improved scratch resistance, coated substrates and methods related thereto
First Claim
1. A multi-component composite comprising (i) a basecoat deposited from a pigmented composition, and (ii) a composition applied over at least a portion of the basecoat, wherein the composition (ii) is formed from components comprising:
- (a) at least one polysiloxane comprising at least one reactive functional group;
(b) at least one reactant comprising at least one functional group that is reactive with at least one functional group selected from the at least one reactive functional group of the at least one polysiloxane and at least one functional group of the at least one reactant; and
(c) a plurality of particles selected from inorganic particles, composite particles, and mixtures thereof;
wherein each component is different,wherein the at least one reactive functional group of the at least one polysiloxane is substantially nonreactive with the particles,wherein a retained scratch resistance value of the composition (ii) when cured is greater than a retained scratch resistance value of a composition that does not contain the plurality of particles wherein each component is different, andwherein the composition (ii) when cured has an initial scratch resistance value such that after scratch testing greater than 40 percent of the initial 20°
gloss is retained.
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Abstract
Coating compositions are provided which are formed from components comprising (a) at least one polysiloxane comprising at least one reactive functional group; (b) at least one reactant comprising at least one functional group that is reactive with at least one functional group selected from the at least one reactive functional group of the at least one polysiloxane and at least one functional group of at least one reactant; and (c) a plurality of particles, wherein each component is different, and wherein the at least one reactive functional group of the at least one polysiloxane and the at least one functional group of the at least one reactant are substantially nonreactive with the particles. A multi-component composite coating composition formed from a basecoat and a topcoat deposited from the curable coating composition also is provided. The multi-component composite coating compositions of the invention provide highly scratch resistant color-plus-clearcoatings capable of retaining scratch resistance after weathering.
233 Citations
72 Claims
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1. A multi-component composite comprising (i) a basecoat deposited from a pigmented composition, and (ii) a composition applied over at least a portion of the basecoat, wherein the composition (ii) is formed from components comprising:
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(a) at least one polysiloxane comprising at least one reactive functional group;
(b) at least one reactant comprising at least one functional group that is reactive with at least one functional group selected from the at least one reactive functional group of the at least one polysiloxane and at least one functional group of the at least one reactant; and
(c) a plurality of particles selected from inorganic particles, composite particles, and mixtures thereof;
wherein each component is different, wherein the at least one reactive functional group of the at least one polysiloxane is substantially nonreactive with the particles, wherein a retained scratch resistance value of the composition (ii) when cured is greater than a retained scratch resistance value of a composition that does not contain the plurality of particles wherein each component is different, and wherein the composition (ii) when cured has an initial scratch resistance value such that after scratch testing greater than 40 percent of the initial 20°
gloss is retained.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
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68. A method for making a multi-component composite comprising:
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(a) applying a pigmented composition to a substrate to form a basecoat (i);
(b) applying a composition (ii) over at least a portion of the basecoat (i); and
(c) curing the composition (ii) to form a cured composition;
wherein the composition (ii) is formed from components comprising;
(I) at least one polysiloxane comprising at least one reactive functional group;
(II) at least one reactant comprising at least one functional group that is reactive with at least one functional group selected from the at least one reactive functional group of the at least one polysiloxane and at least one functional group of the at least one reactant; and
(III) a plurality of particles selected from inorganic particles, composite particles, and mixtures thereof;
wherein each component is different, wherein the at least one reactive functional group of the at least one polysiloxane is substantially nonreactive with the particles, wherein a retained scratch resistance value of the composition (ii) when cured is greater than a retained scratch resistance value of a composition that does not contain the plurality of particles wherein each component is different, and wherein the composition (ii) when cured has an initial scratch resistance value such that after scratch testing greater than 40 percent of the initial 20°
gloss is retained. - View Dependent Claims (69, 70, 71, 72)
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Specification