# US 10,370,513 B2 · Flame-retardant sealing material

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- Number: US 10,370,513 B2
- Document ID: US10370513B2
- Status: Granted
- Kind: B2
- Application number: 15/100,044
- Filed: 2013-11-29
- Published: 2017-01-05
- Granted: 2019-08-06
- Earliest claimed: 2013-11-29
- Assignees: Inoac Corporation
- Applicants: Inoac Corporation
- Inventors: Minoru Kawarabayashi
- Web page: https://patentgrep.com/patent/US10370513B2

## CPC

- C08J 9/0038: {containing phosphorus}
- C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G 18/14: {Manufacture of cellular products}
- C08G 18/4063: {Mixtures of compounds of group C08G18/62 with other macromolecular compounds}
- C08G 18/4829: {Polyethers containing at least three hydroxy groups (C08G18/4833 - C08G18/5096 take precedence)}
- C08G 18/62: Polymers of compounds having carbon-to-carbon double bonds
- C08G 18/6208: {Hydrogenated polymers of conjugated dienes}
- C08G 18/69: Polymers of conjugated dienes {(hydrogenated polymers of conjugated dienes C08G18/6208)}
- C08G 18/698: {Mixtures with compounds of group C08G18/40}
- C08G 18/751: {containing only one cycloaliphatic ring}
- C08G 18/7621: {being toluene diisocyanate including isomer mixtures}
- C08J 9/0061: {characterized by the use of several polymeric components}
- C08K 5/0066: {Flame-proofing or flame-retarding additives}
- C08K 5/521: Esters of phosphoric acids, e.g. of H3PO4
- C08L 75/04: Polyurethanes
- C09K 3/1021: {Polyurethanes or derivatives thereof}
- C09K 21/12: containing phosphorus
- C08G 2101/00: Manufacture of cellular products
- C08G 2110/005: < 50kg/m3
- C08G 2110/0083: prepared using water as the sole blowing agent
- C08J 9/0019: {halogenated}
- C08J 2375/08: from polyethers
- C08J 2409/00: Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J 2457/02: Copolymers of mineral oil hydrocarbons
- 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)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A flame-retardant sealing material comprising a polyurethane foam formed from a polyurethane raw material containing a polyol component, an isocyanate, a water repellent, a flame retardant and the like, wherein the polyol component contains a hydroxyl-terminated prepolymer obtained by the reaction of a polyether polyol and an isocyanate, the water repellent is a polybutadiene polyol or the like, the flame retardant is (1) a non-halogen non-condensed phosphate ester or (2) a halogen-containing non-condensed phosphate ester, which are liquid at ordinary temperature, and the isocyanate index is 100 to 150.

## Claims

### Claim 1

A flame-retardant sealing material comprising a polyurethane foam formed from a polyurethane raw material containing a polyol component, an isocyanate, a foaming agent, a catalyst, a water repellent and a flame retardant,
wherein the polyol component contains 80 to 100 parts by mass of a hydroxyl-terminated prepolymer obtained by the reaction of a polyether polyol and an isocyanate per 100 parts by mass of the polyol component,
the water repellent contains at least one selected from the group consisting of a polybutadiene polyol, a hydrogenated polyol of a polybutadiene, a polyisoprene polyol and a hydrogenated polyol of a polyisoprene,
the hydroxyl-terminated prepolymer has a viscosity at 30° C. of 2000 to 30000 mPa·s,
the polyether polyol has a molecular weight of 300 to 10000,
the amount of the water repellent is 3 to 25 parts by mass per 100 parts by mass of the polyol component,
the flame retardant is a halogen-containing non-condensed phosphate ester that is liquid at room temperature which is tris(1,3-dichloro-2-propyl)phosphate,
the amount of the flame retardant is 3 to 12 parts by mass per 100 parts by mass of the polyol component, and
the isocyanate index is 100 to 150.