Polyaminoamides which filter ultraviolet radiation, process for their preparation and their use in the protection of the skin and hair

US4866159A · kind A · utility

Assignee

• L'Oreal · FR

Inventors

• Serge Forestier · Claye-Souilly, FR
• Gerard Lang · Saint-Gratien, FR
• Edith Sainte Beuve · Survilliers, FR

Key dates

• Filing date: Aug 25, 1986
• Grant date: Sep 12, 1989
• Expiry date: Aug 25, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S424/01
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Polyaminoamides of formula: ##STR1## in which A.sub.1 represents a divalent radical of structure: ##STR2## in which a and b=0 or 1 ##STR3## in which c and d=0 or 1 or ##STR4## B.sub.1 represents: (1) in the proportions of 60 to 100% (in moles), the radical ##STR5## in which x.sub.1 =2 and n.sub.1 =1 or 2, or alternatively, x.sub.1 =3 and n.sub.1 =1 and e=0 or 1 PA1 (2) in the proportions of 0 to 40% (in moles), the radical (II) above in which x.sub.1 =2 and n.sub.1 =0 or the radical ##STR6## (3) in the proportions of 0 to 20% (in moles), the radical EQU --NH--(CH.sub.2).sub.6 --NH--; in radicals A.sub.1 and B.sub.1, Y represents a residue of an ultraviolet radiation-absorbing molecule, and EQU a+b+c+d+e.gtoreq.1, it being understood that when a, b, c, d or e are zero, the nitrogen atom is then bound to a hydrogen atom; PA1 the ratio m/p is between 0.05 and 0.5; PA1 A.sub.2 represents a bivalent radical which has one of the following structures: ##STR7## B.sub.2 represents: (1) in the proportions of 60 to 100% (in moles), the radical ##STR8## in which x.sub.2 =2 and n.sub.2 =2 or 3, or alternatively, x.sub.2 =3 and n.sub.2 =2 PA1 (2) in the proportions of 0 to 40% (in moles), the ra…