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US 6,638,992 B1Granted
Hair care compositions
AssigneeEastman Chemical Company
InventorsRobert Gow-Sheng Chen, Phillip Michael Cook, Ramesh Chand Munjal
Life of this patent
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Abstract
A latex composition for hair care containing a spray-dried hybrid-graft copolymer of a sulfopolyester and an acid-functional polymer segment. The acid-functional polymer segment is formed from at least one acid-functional monomer, at least one ethylenically unsaturated monomer, and at least one amide-containing monomer. Such compositions exhibit superior curl retention even at high humidity.
Claims21
A latex composition for hair care comprising a hybrid-graft copolymer comprising:
- (A) about 2 to about 90 wt %, based on the total hybrid-graft copolymer weight, of a sulfopolyester comprising a condensation polymerization product of:
- (1) about 15 to about 26 mol % dimethyl-5-sodiosulfoisophthalate based on 100 mol % dicarboxylic acid;
- (2) about 60 to about 80 mol % isophthalic acid based on 100 mol % dicarboxylic acid;
- (3) about 10 to about 30 mol % of 1,4-cyclohexanedimethanol based on 100 mol % of diol;
- and
- (4) about 70 to about 90 mol % diethylene glycol based on 100 mol % of diol;
- and
- (B) about 10 to about 98 wt %, based on the total hybrid-graft copolymer weight, of an acid-functional polymer segment comprising:
- (1) about 15 to about 50 wt %, based on the total weight of the acid-functional polymer segment, of an acid-functional monomer;
- (2) about 10 to about 80 wt %, based on the total weight of the acid-functional polymer segment, of an ethylenically unsaturated monomer;
- and
- (3) up to about 40 wt %, based on the total weight of the acid-functional polymer segment, of an amide-functional monomer,
- wherein said hybrid-graft copolymer is a spray-dried hybrid-graft copolymer.
10 more elements
A latex composition for hair care comprising a hybrid-graft copolymer comprising:
- (A) about 5 to about 80 wt %, based on the total hybrid-graft copolymer weight, of a sulfopolyester,
- (B) about 15 to about 55 wt %, based on the total hybrid-graft copolymer weight, of a first acid-functional polymer segment, comprising:
- (1) about 15 to about 50 wt %, based on the total amount of the first acid-functional polymer segment, of an acid-functional monomer,
- (2) about 10 to about 80 wt %, based on the total amount of the first acid-functional polymer segment, of an ethylenically unsaturated monomer;
- and
- (3) up to about 40 wt %, based on the total amount of the first acid-functional polymer segment, of an amide-functional monomer;
- (C) about 5 to about 40 wt %, based on the total hybrid-graft copolymer weight of a second acid-functional polymer segment comprising:
- (1) about 15 to about 50 wt %, based on the total amount of the second acid-functional polymer segment, of an acid-functional monomer,
- (2) about 10 to about 80 wt %, based on the total amount of the second acid-functional polymer segment, of an ethylenically unsaturated monomer;
- and
- (3) up to about 40 wt %, based on the total of the second acid-functional polymer segment, of an amide-functional monomer;
- and wherein said first and second acid-functional polymer segments have different glass transition temperatures and wherein said hybrid-graft copolymer is a spray-dried hybrid-graft copolymer.
9 more elements
A method for the preparation of a spray-dried hybrid-graft copolymer composition, comprising the steps of:
- (A) forming an aqueous dispersion of a sulfopolyester;
- (B) polymerizing in the presence of said aqueous dispersion a first monomer mixture to form a first acid-functional polymer segment, said first monomer mixture comprising:
- (1) about 15 to about 50 wt %, based on the total amount of the first acid-functional polymer segment, of an acid-functional monomer,
- (2) about 10 to about 80 wt %, based on the total amount of the first acid-functional polymer segment, of an ethylenically unsaturated monomer;
- and
- (3) up to about 40 wt %, based on the total of the first acid-functional polymer segment, of an amide-functional monomer;
- and
- (C) polymerizing sequentially a second monomer mixture to form a second acid-functional polymer segment, said second monomer mixture comprising:
- (1) about 15 to about 50 wt %, based on the total amount of the second acid-functional polymer segment, of an acid-functional monomer,
- (2) about 10 to about 80 wt % based on the total amount of the second acid-functional polymer segment, of an ethylenically unsaturated monomer;
- and
- (3) up to about 40 wt %, based on the total of the second acid-functional polymer segment, of an amide-functional monomer;
- (D) isolating said hybrid graft copolymer composition;
- and
- (E) spray-drying the isolated hybrid graft copolymer composition to form a spray-dried hybrid-graft copolymer,
- wherein the amount of said sulfopolyester is from about 5 to about 80 wt %, based on the total amount of said hybrid-graft copolymer;
- the amount of said first acid-functional polymer is from about 15 to about 55 wt %, based on the total amount of said hybrid-graft copolymer;
- and wherein the amount of said second acid-functional polymer is from about 5 to about 40 wt %, based on the total amount of said hybrid-graft copolymer;
- and wherein said first and said second acid-functional polymer segments have different glass transition temperatures (Tg).
16 more elements
Dependencies are inferred from the claim text.