Flame-retardant sealing material

Patent metadata

Field	Value
Publication number	US-10370513-B2
Application number	US-201315100044-A
Country	US
Kind code	B2
Filing date	Nov 29, 2013
Priority date	Nov 29, 2013
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

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.

First claim

The invention claimed is:

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.

Assignees

• Inoue Mtp Kk

Inventors

• Kawarabayashi Minoru

Classifications

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• C08G18/4063

  Mixtures of compounds of group C08G18/62 with other macromolecular compounds · CPC title

• C08G18/6208

  Hydrogenated polymers of conjugated dienes · CPC title

• C08G18/69

  Polymers of conjugated dienes {(hydrogenated polymers of conjugated dienes C08G18/6208)} · CPC title

• C09K21/12

  containing phosphorus · CPC title