Patent ID: 7456147

Claim:
A system for providing controlled release delivery of an active agent, comprising: a repeat sequence protein polymer whose formula comprises T y [(A n ) x (B) b (A′ n′ ) x′ (B′) b′ (A″ n″ ) x″ ] i T′ y′ wherein: T and T′ each comprise an amino acid or amino acid sequence of from about 1 to about 100 amino acids, wherein the amino acid or amino acid sequence of T′ is the same as or different from the amino acid or amino acid sequence of T; y and y′ are each an integer from 0 to 1, wherein the integer of y′ is the same as or different from the integer of y; A, A′ and A″ are each individual repeating sequence units comprising from about 3 to about 30 amino acids, wherein the amino acid sequence of A′ and the amino acid sequence of A″ are the same as or different from the amino acid sequence of A, and wherein A, A′, and A″ comprise at least one sequence selected from the group consisting of SEQ ID NO: 1, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, SEQ ID NO: 6, SEQ ID NO: 7, SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO: 17, SEQ ID NO: 18, SEQ ID NO: 19, SEQ ID NO: 20, and combinations thereof; n, n′, and n″ are integers of at least 2 and not more than 250; x, x′ and x″ are each 0 or an integer of at least 1 with the proviso that not all of x, x′, and x″ can be 0, wherein each integer value for x, x′, and x″ varies to provide for at least 30 total amino acids in the A, A′ and A″ individual repeating sequence units, and wherein the integer of x′ and the integer of x″ are the same as or different from the integer of x; B and B′ each comprise an amino acid sequence of from about 4 to about 50 amino acids, wherein the amino sequence of B′ is the same as or different from the amino acid sequence of B; b and b′ are each an integer from 0 to 3, wherein the integer of b′ is the same as or different from the integer of b; and i is an integer from 1 to 100; and at least one active agent comprising a personal care product component selected from the group consisting of: enzymes, vitamins, anti-oxidants, moisturizing agents, alpha hydroxy acids, Natural Moisturizing Factor, hyaluronic acid, fragrances, dyes, pigments, tints, UV filters, sunscreens, lanolin, bleaches, thickening agents, algae, plant extracts, preservatives, and combinations thereof; wherein the repeat sequence protein polymer and the at least one active agent form a complex wherein said repeat sequence protein polymer includes at least one hydrophilic or hydrophobic portion that interacts with said at least one active agent via hydrogen bonding, van der Waals interactions, nonionic interactions, or ionic interactions.