Water-soluble, uv-absorbing and/or flourescent components with very high isoelectric points

A method of making a water-soluble, UV-absorbing and/or fluorescing compound having an isoelectric point greater than 10, comprising:

• obtaining molecules:
• chosen from the group of molecules consisting of those containing at least one secondary alcohol OH group with a pKa value greater than 10, those containing at least one primary alcohol OH group and at least one secondary alcohol OH group with respective pKa values greater than 10, and those containing at least two secondary alcohol OH groups with respective pKa values greater than 10;
• attaching at least one amino group having a pKb value smaller than 5 selected from the group consisting of primary amino, secondary amino, tertiary amino and quaternary ammonio groups;
• and
• attaching at least one UV absorbing group or at least one fluorescing group or a combination thereof.

A method of making a water-soluble, UV-absorbing and/or fluorescing compound having an isoelectric point greater than 10, comprising:

• obtaining molecules:
• chosen from the group of molecules consisting of those containing at least one secondary alcohol OH group with a pKa value greater than 10 and at least one amino group with a pKb value smaller than 5, those containing at least one primary alcohol OH group and at least one secondary alcohol OH group with respective pKa values greater than 10 and at least one amino group with a pKb value smaller than 5 or a quaternary ammonium group, and those containing at least two secondary alcohol OH groups with respective pKa values greater than 10 and at least one amino group with a pKb value smaller than 5 or a quaternary ammonio group;
• and
• attaching at least one UV absorbing group or at least one fluorescing group or a combination thereof.

A method of making a water-soluble, UV-absorbing and/or fluorescing compound having an isoelectric point greater than 10, comprising:

• obtaining molecules:
• chosen from the group of molecules consisting of those containing at least a UV absorbing group or a fluorescing group or a combination thereof, and at least one secondary alcohol OH group with a pKa value greater than 10 or at least one primary alcohol OH group and at least one secondary alcohol OH group with respective pKa values greater than 10 or at least two secondary alcohol OH groups with respective pKa values greater than 10;
• and
• attaching at least one amino group having a pKb value smaller than 5 selected from the group consisting of primary amino, secondary amino, tertiary amino or quaternary ammonio groups or combinations thereof.

A method of making a water-soluble, UV-absorbing and/or fluorescing compound having an isoelectric point greater than 10, comprising:

• obtaining molecules:
• chosen from the group of molecules consisting of those containing at least a UV absorbing group or a fluorescing group or a combination thereof, and at least one amino group having a pKb value smaller than 5 selected from the group consisting of primary amino, secondary amino, tertiary amino or quaternary ammonio groups or combinations thereof;
• and
• attaching at least one R group wherein R contains at least one secondary alcohol OH group with a pKa value greater than 10, or at least one primary alcohol OH group and at least one secondary alcohol OH group with respective pKa values greater than 10, or at least two secondary alcohol OH groups with respective pKa values greater than 10, or combinations thereof.