ANTI-CORROSIVE PARTICLES
First Claim
1. A dispersion of anti-corrosive particles comprising:
- (a) fluid, and(b) anti-corrosive particles comprising inorganic oxides having mesoporosity and/or macroporosity such that the average pore size is at least about 2 nm and an average pore volume of at least about 0.2 ml/g.
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Accused Products
Abstract
The present invention relates to anti-corrosive particles based on inorganic oxide products such as silica or alumina modified with polyvalent metal cations optionally comprising anions of weak acids which may be inorganic or organic in nature and their conjugate species. In particular, the present invention is concerned with anti-corrosive pigment particles comprising inorganic oxides or mixtures of inorganic oxides displaying mesoporosity and/or macroporosity such that the average pore size, averaged over the mixture of inorganic oxides where more than one oxide is involved is greater than 2 nm and the average pore volume is greater than 0.2 ml/g. The present invention is also related to methods of making such particles and to anti-corrosive compositions made with them. The present invention further relates to articles to which the anti-corrosive compositions have been applied.
75 Citations
73 Claims
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1. A dispersion of anti-corrosive particles comprising:
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(a) fluid, and (b) anti-corrosive particles comprising inorganic oxides having mesoporosity and/or macroporosity such that the average pore size is at least about 2 nm and an average pore volume of at least about 0.2 ml/g. - View Dependent Claims (2, 3, 6, 8, 10, 11, 12, 13, 14, 16)
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17. A dispersion of anti-corrosive particles comprising:
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(a) fluid, and (b) anti-corrosive inorganic oxide particles having mesoporosity and/or macroporosity such that the average pore size is at least about 2 nm and an average pore volume of at least about 0.2 ml/g modified with polyvalent metal cations, optionally comprising inorganic or organic anions of weak acids and their conjugate species defined in terms of the number of moles of the ith cation, anion or oxide represented by the symbols mic, mia and mio respectively;
the total number of moles of each component given by the sum over all cations, anions and oxides that are to be employed where an upper bar signifies that more than one cation, anion or oxide may be involved in the pigment composition
Σ
mic=mc
Σ
mia=ma
Σ
mio=mo where mc ,ma andmo are the total number of moles of cations, anions and oxides respectively;
mc,a andmc,o the total number of moles of cations associated with the anion and oxide respectively;
the proportion of the ith cation, anion and oxide as a fraction of the total number of cations, anions and oxides ci, ai and oi - View Dependent Claims (18, 19, 20, 22, 23)
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36. A powder of anti-corrosive particles comprising:
(a) anti-corrosive particles comprising inorganic oxides having mesoporosity and/or macroporosity such that the average pore size is at least about 2 nm and an average pore volume of at least about 0.2 ml/g. - View Dependent Claims (37, 38, 49)
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Specification