UV-sensitive marking composition
First Claim
1. A composition for placing a temporarily visible mark on a surface, comprising:
- a) a paint base; and
b) a pigmented colorant, dispersed within the paint base, having characteristics that cause the mark to progressively become substantially invisible upon exposure to UV light, wherein the pigmented colorant is a dispersion of dyed melamine-toluenesulfonamide-formaldehyde polymer in a mixture of alkyl based resins and aliphatic hydrocarbons.
2 Assignments
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Accused Products
Abstract
A marking composition for placing a temporarily visible mark on a surface. The composition includes a paint base and a pigmented colorant. The pigmented colorant is dispersed within the paint base, and has characteristics that cause the mark to progressively become substantially invisible upon exposure to UV light. Additives, such as UV absorbers and anti-oxidants may be included to alter the rate at which the mark becomes invisible. The pigmented colorant may be a dispersion of dyed melamine-toluenesulfonamide-formaldehyde polymer in a mixture of alkyl based resins and aliphatic hydrocarbons. The colorant may be about 2 to 30 parts by weight of the composition.
20 Citations
32 Claims
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1. A composition for placing a temporarily visible mark on a surface, comprising:
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a) a paint base; and
b) a pigmented colorant, dispersed within the paint base, having characteristics that cause the mark to progressively become substantially invisible upon exposure to UV light, wherein the pigmented colorant is a dispersion of dyed melamine-toluenesulfonamide-formaldehyde polymer in a mixture of alkyl based resins and aliphatic hydrocarbons. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 25, 26, 27)
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13. A method of temporarily marking a surface, comprising the steps of:
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a) applying a marking composition having;
i) a paint base; and
ii) a pigmented colorant, dispersed within the paint base, having UV-sensitive fading characteristics, wherein the pigmented colorant is a dispersion of dyed melamine-toluenesulfonamide-formaldehyde polymer in a mixture of alkyl based resins and aliphatic hydrocarbons; and
b) exposing the marking composition to UV light, such that the mark fades progressively to an extent that it is substantially invisible. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 28, 29, 30, 31, 32)
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Specification