# US 11,111,979 B2 · Elastomeric articles with improved fire protection properties > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,111,979 B2 - Document ID: US11111979B2 - Status: Granted - Kind: B2 - Application number: 16/332,855 - Filed: 2017-09-18 - Published: 2019-08-15 - Granted: 2021-09-07 - Earliest claimed: 2016-09-17 - Assignees: Firestone Industrial Products Company, LLC - Applicants: Firestone Industrial Products Company, LLC - Inventors: Michael C. Howard; Brandon C. Adcock; Hang Li - Web page: https://patentgrep.com/patent/US11111979B2 ## CPC - F16F 9/0409: {characterised by the wall structure} - C08K 3/04: Carbon - C08K 3/22: of metals - C08K 3/346: {Clay} - C08K 3/36: Silica - C08K 5/02: Halogenated hydrocarbons {(C08K5/0091 takes precedence)} - C08L 7/00: Compositions of natural rubber - C08L 9/06: Copolymers with styrene - C08L 11/00: Compositions of homopolymers or copolymers of chloroprene - C08L 15/00: Compositions of rubber derivatives (C08L11/00, C08L13/00 take precedence) - C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers - F16F 1/3605: {characterised by their material (F16F1/362, F16F1/364, F16F1/366, F16F1/37 take precedence; composition of macromolecular compounds in general C08L)} - F16F 9/04: in a chamber with a flexible wall {(producing hollow articles of plastics, e.g. air bellows, B29D22/00)} - F16F 9/38: Covers for protection or appearance - C08K 2003/2227: {of aluminium} - C08K 2003/2296: {of zinc} - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract An air spring having an airsleeve, wherein at least one layer of the airsleeve includes the vulcanization product of a composition that includes at least one vuicanizable polymer, a curative, at least one halogenated hydrocarbon wax, and expandable graphite. ## Claims ### Claim 1 An air spring having an airsleeve, wherein at least one layer of said airsleeve includes the vulcanization product of a composition that includes at least one vulcanizable polymer; a curative; at least one halogenated hydrocarbon wax; and expandable graphite, where the total amount of vulcanizable polymer is from about 25 to about 40 wt. %, based upon the total weight of the composition. ### Claim 2 (depends on 1) The air spring of claim 1, where the at least one vulcanizable polymer comprises polychloroprene. ### Claim 3 (depends on 1) The air spring of claim 1, where the at least one vulcanizable polymer comprises polychloroprene, and where the composition further comprises at least one additional vulcanizable polymer selected from the group consisting of natural rubber, synthetic polyisoprene, polybutadiene, polyisobutylene-co-isoprene, poly(ethylene-co-propylene), poly(styrene-co-butadiene), poly(styrene-co-isoprene), and poly(styrene-co-isoprene-co-butadiene), poly(isoprene-co-butadiene), poly(ethylene-co-propylene-co-diene), polysulfide rubber, acrylic rubber, urethane rubber, nitrile rubber, silicone rubber, epichlorohydrin rubber, and mixtures thereof. ### Claim 4 (depends on 1) The air spring of claim 1, where the at least one halogenated hydrocarbon wax is present in an amount of from about 0.2 parts by weight to about 25 parts by weight, based upon one hundred parts by weight rubber. ### Claim 5 (depends on 1) The air spring of claim 1, where the composition comprises from about 0.5 parts by weight to about 40 parts by weight expandable graphite, based upon one hundred parts by weight rubber. ### Claim 6 (depends on 1) The air spring of claim 1, where the composition further comprises from about 0.1 parts by weight to about 20 parts by weight alumina trihydrate, based upon one hundred parts by weight rubber. ### Claim 7 (depends on 1) The air spring of claim 1, where the composition further comprises from about 20 parts by weight to about 100 parts by weight clay, based upon one hundred parts by weight rubber. ### Claim 8 An air bellow prepared by a process comprising the steps of: (i) preparing a vulcanizable composition that includes at least one vulcanizable polymer, a curative, at least one halogenated hydrocarbon wax, and expandable graphite, where the total amount of vulcanizable polymer is from about 25 to about 40 wt. %, based upon the total weight of the composition; (ii) fabricating an uncured air bellow comprising at least one layer that is formed from said vulcanizable composition; and (iii) at least partially curing the uncured air bellow. ### Claim 9 (depends on 8) The air bellow of claim 8, where the vulcanizable composition further comprises from about 0.1 parts by weight to about 20 parts by weight alumina trihydrate, based upon one hundred parts by weight rubber. ### Claim 10 (depends on 8) The air bellow of claim 8, where the composition further comprises from about 20 parts by weight to about 100 parts by weight clay, based upon one hundred parts by weight rubber. ### Claim 11 (depends on 8) The air bellow of claim 8, where the composition further comprises carbon black. ### Claim 12 (depends on 8) The air bellow of claim 8, where the composition further comprises silica. ### Claim 13 (depends on 8) The air bellow of claim 8, where the composition further comprises factice. ### Claim 14 (depends on 8) The air bellow of claim 8, where the composition further comprises one or more plasticizers. ### Claim 15 (depends on 8) The air bellow of claim 8, where the composition further comprises one or more homogenizing agents. ### Claim 16 (depends on 8) The air bellow of claim 8, where the composition further comprises one or more antioxidants. ### Claim 17 (depends on 8) The air bellow of claim 8, where the composition further comprises zinc oxide. ### Claim 18 (depends on 8) The air bellow of claim 8, where the composition further comprises one or more tackifiers. ### Claim 19 An air spring having an airsleeve, wherein at least one layer of said airsleeve includes the vulcanization product of a composition that includes: (i) at least one vulcanizable polymer that is selected from the group consisting of polychloroprene, polychloroprene copolymers, natural rubber, blends of natural rubber and a diene polymer, and combinations thereof; (ii) a curative; (iii) at least one halogenated hydrocarbon wax; and (iv) expandable graphite, where the total amount of vulcanizable polymer is from about 25 to about 40 wt %, based upon the total weight of the composition.