TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The mineral particles are cationic (preferably metal oxide particles). The metal is aluminum, zirconium, phosphorus, gallium, cerium, germanium, barium, strontium, yttrium, antimony and/or cesium.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent is water, a solvent, a mixture of miscible solvents or a mixture of water and miscible solvent (preferably a polar organic solvent, especially ethanol, propanol, butanol, ethylene glycol, propylene glycol, triethylene glycol, glyme, diglyme, ethyl acetate, propyl acetate, butyl acetate, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether 2-(1-methoxy) propyl acetate, propylene glycol monomethyl ether, ethyl lactate, anisole, methyl adipate, or cyclopentanol). The monomer (A) is ethylenically unsaturated, linear or branched, aliphatic, cyclic or aromatic monocarboxylic or polycarboxylic acid or anhydride (preferably a monocarboxylic or polycarboxylic acid or a carboxylic anhydride of formula (R11)HC=C(R12)COOH, especially acrylic, methacrylic, citraconic, maleic, fumaric, itaconic or crotonic acids or anhydrides). The monomer (B1) is a compound of formula (R1a)(R1a)-C=C(R1a)-COOH; and optionally a compound of formula (R1a)(R1a)-C=C(R3a)-C(O)-O-(CH2-CH(R4a)O)m1-(CH(R5a)-CH2O)n1-R6a.R11=H, COOH, -(CH2)n'-COOH or 1-4C alkyl; or is H, COOH, (CH2)-COOH, methyl or ethyl;n' and m'=1 - 4;R12=H, -(CH2)m'-COOH or 1-4C alkyl; or is H, CH2COOH or methyl;R1a=H, 1-4C hydrocarbon optionally comprising -COOH, or COOH;R3a=H or methyl;R4a and R5a=H or 1-4C alkyl;R6a=H, 1-30C alkyl, aryl, alkylaryl or arylalkyl (preferably 8-30C alkyl, aryl, alkylaryl or arylalkyl);n1=2 - 100 (preferably 6 - 100);m1=0 - 50.When R11 is H, COOH, (CH2)-COOH, methyl or ethyl, R12 is H, CH2COOH or methyl.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer (IIA) is a compound of formula H-(O-CH(R5)-CH2)n-(O-CH(R4)-CH2)m-O-R3-P(O)(OR1)(OR2). The molar ratio between the phosphonate molar equivalent of the polymer (IIA) and the moles of total metal oxides of the dispersion is 0.001 - 10. The water-soluble or water-dispersible polymer (IIB) is obtained by polymerizing at least one monomer (A). The polymer (IIB) is derived from the polymerization of at least one monomer (B1). The molar ratio between the acid moles of the water-soluble or water-dispersible polymer (IIB) and the moles of total cerium atoms of the dispersion is 0.001 - 5. The support is made of polycarbonate. EXAMPLE - A colloidal dispersion of cerium oxide nanoparticles were prepared by a process as described in US5344588. The stabilized dispersion of cerium oxide nanoparticles was concentrated and washed with deionized water to remove excess salt to a final aqueous dispersion at 719.5 g/l, density of 1.61 g/cc, pH of 5.9. This concentrated dispersion was freeze dried to cerium oxide nanoparticles with poly(oxyalkene) phosphonate (CeO2-polymer) redispersible powder. A hard-coat silicon formulation comprising (wt.%): SiO2 (0.07896), trimethoxysilane (0.2491), acetic acid (0.0235), water (0.11844) and 2-butanol (0.1) was prepared. The redispersed Ce-Phos-Peo-2 dispersion in 2-butanol was mixed with the silicon hard-coat in a 1:1 ratio to give stable clear dispersion. 6 Sheets of polycarbonate were prepared. The sheet coated with the hard-coat silicon formulation was used as test. Uncoated sheet was used as control. The test/control was evaluated for yellowing and blacking ability. It was observed that the cerium oxide added to the test silicon hard-coat formulation prevented polycarbonate from yellowing and blacking both linked to aging as compared to the control.