# US 8,785,531 B2 · Dispersions of olefin block copolymers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,531 B2 - Document ID: US8785531B2 - Status: Granted - Kind: B2 - Application number: 11/824,765 - Filed: 2007-07-02 - Published: 2008-01-10 - Granted: 2014-07-22 - Earliest claimed: 2006-07-06 - Assignees: Dow Global Technologies LLC - Applicants: Mark W. VanSumeren; Ronald Wevers; Charles F. Diehl; Gary M. Strandburg; Brad Maurice Moncla; Kevin D. Maak - Inventors: Mark W. VanSumeren; Ronald Wevers; Charles F. Diehl; Gary M. Strandburg; Brad Maurice Moncla; Kevin D. Maak - Web page: https://patentgrep.com/patent/US8785531B2 ## CPC - C08F 297/08: polymerising mono-olefins - C08F 297/083: {the monomers being ethylene or propylene} - C08J 5/04: Reinforcing macromolecular compounds with loose or coherent fibrous material - C08J 5/06: using pretreated fibrous materials - C08J 9/122: {Hydrogen, oxygen, CO2, nitrogen or noble gases} - C08J 9/28: by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum - C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond} - C08L 53/00: Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers - G03G 9/08788: {Block polymers} - C08J 2205/05: Open cells, i.e. more than 50% of the pores are open - C08J 2353/00: Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers - C08L 23/00: Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers - C08L 2201/50: Aqueous dispersion, e.g. containing polymers with a glass transition temperature (Tg) above 20°C - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A dispersion and methods for forming a dispersion that includes a catalytic linear multi-block olefin interpolymer, and at least one dispersing agent, wherein the catalytic linear multi-block olefin interpolymer includes at least one hard segment and at least one soft segment is disclosed. Various applications of the dispersion are also disclosed. ## Claims ### Claim 1 An article comprising: (A) a frothed foam produced from a dispersion comprising: a catalytic linear multi-block olefin interpolymer that is a linear ethylene/α-olefin multi-block copolymer with at least 50 mole percent ethylene and having a Mw/Mn from 1.7 to 3.5, a melting point, Tm, in degrees Celsius, and density, d, in grams/cubic centimeter, wherein Tm>−2002.9+4538.5(d)−2422.2(d)2; at least one dispersing agent comprising a polar polyolefin; wherein the catalytic linear multi-block olefin interpolymer comprises at least one hard segment and at least one soft segment; and the dispersion is dispersed in acrylonitrile monomer; (B) microcavities on at least one surface of the foam; and (C) the frothed foam has a compression set at 85° C., 20 minutes, at a pressure of 0.1 psig of less than 45 percent. ### Claim 2 (depends on 1) The article of claim 1, wherein the catalytic linear multi-block olefin interpolymer comprises from 5 to 70 weight percent of the at least one hard segment. ### Claim 3 (depends on 1) The article of claim 1, wherein the multi-block olefin interpolymer comprises an ethylene/octene multi-block copolymer. ### Claim 4 (depends on 1) The article of claim 1, wherein the at least one hard segment comprises from 0 to 5 weight percent α-olefin. ### Claim 5 (depends on 1) The article of claim 1, wherein the at least one soft segment comprises from 5 to 60 weight percent α-olefin. ### Claim 6 (depends on 1) The article of claim 1, wherein the multi-block olefin interpolymer comprises at least one polymer fraction obtained by preparative TREF, wherein the fraction has a block index from 0.3 to 1.0. ### Claim 7 (depends on 1) The article of claim 1, wherein the multi-block olefin interpolymer has a density from 0.875 g/cc to 0.945 g/cc and a Tm from 115° C. to 125° C. ### Claim 8 (depends on 1) The article of claim 1 wherein the dispersion comprises a dispersed particulate having an average volume diameter particle size of greater than 0 and up to about 10 micrometers. ### Claim 9 (depends on 1) The article of claim 1, wherein the dispersion comprises a dispersed particulate having an average solids content of greater than 0 up to about 80 weight percent. ### Claim 10 (depends on 1) The article of claim 1, wherein the dispersion is an aqueous dispersion. ### Claim 11 (depends on 1) The article of claim 1, wherein the frothed foam has a compression set at 85° C., 20 minutes, at a pressure of 0.5 psig of less than 70 percent. ### Claim 12 (depends on 1) The article of claim 1, comprising cells having a size ranging from about 5 micrometers diameter to about 1000 micrometers diameter. ### Claim 13 (depends on 12) The article of claim 12, wherein the cells comprise open cells. ### Claim 14 (depends on 12) The article of claim 12 wherein the cells having a size ranging from about 5 micrometers diameter to about 1000 micrometers diameter comprise greater than about 50 percent by volume of the total cells. ### Claim 15 (depends on 1) The article of claim 1, wherein the dispersion has a viscosity of not more than about 50,000 cP at 25° C. ### Claim 16 (depends on 1) The article of claim 1 wherein the microcavities cumulatively comprise from 5% to not more than 29% of the total volume of the frothed foam. ### Claim 17 (depends on 1) The article of claim 1 comprising particles of a water-absorbent polymer substantially constrained within the microcavities. ### Claim 18 (depends on 1) The article of claim 1 comprising: particles of a water-absorbent polymer substantially constrained within the microcavities. ### Claim 19 (depends on 18) The article of claim 18 wherein the article is selected from the group consisting of diapers, adult incontinence pants, feminine hygiene pads, household cleaning articles, pet urine absorption pads, garbage bag liquid absorbent pads. ### Claim 20 (depends on 18) The article of claim 18 wherein the article is a diaper. ### Claim 21 (depends on 18) The article of claim 18 wherein the article is a feminine hygiene pad. ### Claim 22 (depends on 1) The article of claim 1 wherein the article is a liquid absorbent layer. ### Claim 23 (depends on 22) A diaper comprising the liquid absorbent layer of claim 22. ### Claim 24 (depends on 22) A feminine hygiene pad comprising the liquid absorbent layer of claim 22.