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US 7,740,900 B2Granted
Method of preparing a light-absorbing coating
AssigneeKoninklijke Philips Electronics N.V.
InventorsMarcel Rene Boehmer, Theodora Antonia Petra Maria Keursten
Life of this patent
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Abstract
A method of preparing a light-absorbing layer applied to a lamp vessel of an electric lamp. At least a part of the lamp vessel is provided with a light-absorbing coating which has stabilized pigments incorporated in a sol-gel matrix. In order to stabilize the pigments, an aminosilane is added.
Claims12
A method of preparing a light-absorbing layer for use in a lamp, said method at least comprising:
- preparing a pigment dispersion by mixing said pigment with an alcohol-comprising liquid and adding a stabilizer which includes an aminosilane, wherein the pigment is an inorganic pigment;
- preparing a hydrolysis mixture comprising a silane which is subjected to a sol-gel process;
- mixing the pigment dispersion and the hydrolysis mixture to form said light-absorbing layer;
- and
- applying the mixed pigment dispersion and hydrolysis mixture to at least a portion of a lamp vessel to form the light-absorbing layer;
- wherein said aminosilane is selected from the group consisting of dimethylaminopropylsilane, (N,N,-dimethylaminopropyl)trialkoxysilane, and a salt of a trimethylaminopropylsilane.
3 more elements
A method of preparing a light-absorbing layer for use in a lamp, said method at least comprising:
- preparing a pigment dispersion by mixing said pigment with an alcohol-comprising liquid and adding a stabilizer which includes an aminosilane;
- preparing a hydrolysis mixture comprising a silane which is subjected to a sol-gel process;
- mixing the pigment dispersion and the hydrolysis mixture;
- and
- applying the mixed pigment dispersion and hydrolysis mixture to at least a portion of a lamp vessel to form the light-absorbing layer;
- wherein said aminosilane is selected from the group consisting of dimethylaminopropylsilane, (N,N-dimethylaminopropyl)trimethoxysilane, and (N,N-dimethylaminopropyl)triethoxysilane.
3 more elements
A method of preparing a light-absorbing layer for use in a lamp, said method at least comprising:
- preparing a pigment dispersion by mixing said pigment with an alcohol-comprising liquid and adding a stabilizer which includes an aminosilane;
- preparing a hydrolysis mixture comprising a silane which is subjected to a sol-gel process;
- mixing the pigment dispersion and the hydrolysis mixture to form said light-absorbing layer;
- and
- applying the mixed pigment dispersion and hydrolysis mixture to at least a portion of a lamp vessel to form the light-absorbing layer;
- wherein the pigment is selected from the group consisting of iron oxide, iron oxide doped with phosphor, zinc-iron oxide, cobalt aluminate, neodymium oxide, bismuth vanadate, zirconium praseodymium silicate and mixtures thereof;
- wherein said aminosilane is selected from the group consisting of dimethylaminopropylsilane, (N,N,-dimethylaminopropyl)trialkoxysilane, and a salt of a trimethylaminopropylsilane.
4 more elements
A method of manufacturing an electric lamp vessel comprising:
- preparing a pigment dispersion by mixing a pigment with a liquid and adding a stabilizer, the stabilizer including an aminosilane, wherein the pigment is an inorganic pigment;
- preparing a hydrolysis mixture comprising a sol-gel precursor;
- mixing the pigment dispersion and the hydrolysis mixture;
- and
- applying the mixed pigment dispersion and hydrolysis mixture to at least a portion of the lamp vessel to form a light-absorbing layer;
- wherein said aminosilane is selected from the group consisting of dimethylaminopropylsilane, (N,N,-dimethylaminopropyl)trialkoxysilane, and a salt of a trimethylaminopropylsilane.
3 more elements
A method of manufacturing an electric lamp comprising:
- preparing a pigment dispersion by mixing a pigment with a liquid and adding a stabilizer, the stabilizer including an aminosilane, wherein the pigment is an inorganic pigment;
- preparing a hydrolysis mixture comprising a sol-gel precursor;
- mixing the pigment dispersion and the hydrolysis mixture;
- applying the mixed pigment dispersion and hydrolysis mixture to at least a portion of a lamp vessel to form a light-absorbing layer;
- and
- assembling the electric lamp including the lamp vessel;
- wherein said aminosilane is selected from the group consisting of dimethylaminopropylsilane, (N,N,-dimethylaminopropyl)trialkoxysilane, and a salt of a trimethylaminopropylsilane.
4 more elements
Dependencies are inferred from the claim text.