Strontium borate pigment composition, method of making same, and processes of imparting anti-corrosive, anti-bacterial/anti-fungal and non-flammable properties to materials by using same

A process of imparting anti-corrosive properties to a material, the process comprising the step of blending a strontium borate pigment composition with the material, said strontium borate pigment composition comprising particles of a strontium borate represented by the general formula (1):

• .alpha.SrO..beta.B.sub.2 O.sub.3..gamma.H.sub.2 O (1)
• (wherein O<.alpha..ltoreq.3, O<.beta..ltoreq.4, O.ltoreq..gamma..ltoreq.5),
• said particles being coated with:
• (A) at least one compound selected from the group consisting of compounds represented by the formulae (3) to (6):
• .eta.SrO..theta.Al.sub.2 O.sub.3..iota.H.sub.2 O (3)
• (wherein O<.eta..ltoreq.5, O<.theta..ltoreq.16, O.ltoreq..iota..ltoreq.6)
• SrSO.sub.4 ( 4)
• SrCO.sub.3 ( 5)
• and
• SrHPO.sub.4 ( 6);
• or (B) at least one compound selected from the group recited in (A) and a compound represented by the formula:
• .delta.SrO..epsilon.SiO.sub.2..zeta.H.sub.2 O (2)
• (wherein O<.delta..ltoreq.3, O<.epsilon..ltoreq.2, O.ltoreq..zeta..ltoreq.4):
• said pigment composition having an average particle diameter of 0.1 .mu.m to 5 .mu.m and a water-soluble content of not greater than 15% by weight.

A process of imparting anti-bacterial properties, antifungal properties or both anti-bacterial and anti-fungal properties to a material, the process comprising the step of blending a strontium borate pigment composition with the material, said strontium borate pigment composition comprising particles of a strontium borate represented by the general formula (1):

• .alpha.SrO..beta.B.sub.2 O.sub.3..gamma.H.sub.2 O (1)
• (wherein O<.alpha..ltoreq.3, O<.beta..ltoreq.4, O.ltoreq..gamma..ltoreq.5),
• said particles being coated with:
• (A) at least one compound selected from the group consisting of compounds represented by the formulae (3) to (6):
• .eta.SrO..theta.Al.sub.2 O.sub.3..iota.H.sub.2 O (3)
• (wherein O<.eta..ltoreq.5, O<.theta..ltoreq.16, O.ltoreq..iota..ltoreq.6)
• SrSO.sub.4 ( 4)
• SrCO.sub.3 ( 5)
• and
• SrHPO.sub.4 ( 6);
• or (B) at least one compound selected from the group recited in (A) and a compound represented by the formula:
• .delta.SrO..epsilon.SiO.sub.2..zeta.H.sub.2 O (2)
• (wherein O<.delta..ltoreq.3, O<.epsilon..ltoreq.2, O.ltoreq..zeta..ltoreq.4):
• said pigment composition having an average particle diameter of 0.1 .mu.m to 5 .mu.m and a water-soluble content of not greater than 15% by weight.

A process of imparting non-flammable properties to a material, the process comprising the step of blending a strontium borate pigment composition with the material, said strontium borate pigment composition comprising particles of a strontium borate represented by the general formula (1):

• .alpha.SrO..beta.B.sub.2 O.sub.3..gamma.H.sub.2 O (1)
• (wherein O<.alpha..ltoreq.3, O<.beta..ltoreq.4, O.ltoreq..gamma..ltoreq.5),
• said particles being coated with:
• (A) at least one compound selected from the group consisting of compounds represented by the formulae (3) to (6):
• .eta.SrO..theta.Al.sub.2 O.sub.3..iota.H.sub.2 O (3)
• (wherein O<.eta..ltoreq.5, O<.theta..ltoreq.16, O.ltoreq..iota..ltoreq.6)
• SrSO.sub.4 ( 4)
• SrCO.sub.3 ( 5)
• and
• SrHPO.sub.4 ( 6);
• or (B) at least one compound selected from the group recited in (A) and a compound represented by the formula:
• .delta.SrO..epsilon.SiO.sub.2..zeta.H.sub.2 O (2)
• (wherein O<.delta..ltoreq.3, O<.epsilon..ltoreq.2, O.ltoreq..zeta..ltoreq.4):
• said pigment composition having an average particle diameter of 0.1 .mu.m to 5 .mu.m and a water-soluble content of not greater than 15% by weight.