Loading patent…
AssigneeKraton Polymers U.S. LLC
InventorWouter De Jong
Estimating the term…
Articles with enhanced tensile strength and comfort are prepared from a latex comprising water and a styrenic block copolymer, wherein the styrenic block copolymer has 2 or more poly(vinyl aromatic) blocks and at least one block of polymerized conjugated diene, wherein the styrenic block copolymer has a weight average molecular weight of 150,000 to 250,000, the poly(vinyl aromatic) blocks have a weight average molecular weight ranging from 9,000 to 15,000, and the content of poly(vinylaromatic) blocks in the styrenic block copolymer ranges from 8 to 15% wt, based on the total styrenic block copolymer, by a process which comprises coating a surface with the latex to obtain a film, wherein the latex comprises a vulcanizing agent. The invention also provides a latex comprising such a styrenic block copolymer and a vulcanizing agent, as well as a styrenic block copolymer that is particularly suitable for use in such a latex.
A latex comprising water and a styrenic block copolymer, wherein the styrenic block copolymer has 2 or more poly(vinyl aromatic) blocks, said poly(vinyl aromatic) blocks are a polystyrene block, containing less than 5 wt % of copolymerizable monomer, based on the weight of poly(vinyl aromatic) block and at least one block of polymerized conjugated diene, said conjugated diene is a polyisoprene block, containing less than 5 wt % of copolymerizable monomer, based on the weight of block polymerized conjugated diene, wherein the styrenic block copolymer has a weight average molecular weight of 170,000 to 220,000, the poly(vinyl aromatic) blocks have a weight average molecular weight ranging from 9,000 to 14,000, and the content of poly(vinylaromatic) blocks in the styrenic block copolymer ranges from 9 to 14% wt, based on the total styrenic block copolymer, and a vulcanising agent.
Cured, vulcanized latex comprising a styrenic block copolymer comprising 2 or more poly(vinyl aromatic) blocks and at least one block of polymerized conjugated diene, wherein the styrenic block copolymer has a weight average molecular weight of 170,000 to 220,000, the poly(vinyl aromatic) blocks have a weight average molecular weight ranging from 9,000 to 14,000, and the content of poly(vinylaromatic) blocks in the styrenic block copolymer ranges from 9 to 14% wt, based on the total styrenic block copolymer, said cured, vulcanized latex has a tensile strength ≧23.9 but ≦33.9 MPa, and said latex has a 10% Young's Modulus ≧0.22 but ≦0.25 MPa, according to ASTM D412 and ASTM D3577.
Dependencies are inferred from the claim text.