Method for producing flame retardant polyurethane foams using halogen-free flame retardants

• US 10,563,032 B2
• Filed: 11/18/2015
• Issued: 02/18/2020
• Est. Priority Date: 11/18/2014
• Status: Active Grant

• Current Assignee: Covestro Deutschland AG
• Original Assignee: Covestro Deutschland AG
• Inventors: Meyer-Ahrens, Sven, Reiter, Stephan, Cavlan, Engin, Gossner, Matthaus
• Primary Examiner(s): Cooney, John M
• Application Number:
  US15/525,968
• Publication Number:
  US 20170306122A1
• Time in Patent Office: 1,553 Days
• CPC Class Codes: C07F 9/12 with hydroxyaryl compounds
• CPC Class Codes: C08G 18/4837 and other oxyalkylene units
• CPC Class Codes: C08G 18/4866 having a low unsaturation value
• CPC Class Codes: C08G 18/7621 being toluene diisocyanate including isomer mixtures
• CPC Class Codes: C08G 2101/00 Manufacture of cellular products
• CPC Class Codes: C08G 2110/0008 flexible
• CPC Class Codes: C08G 2110/005 < 50kg/m3
• CPC Class Codes: C08G 2110/0083 prepared using water as the sole blowing agent
• CPC Class Codes: C08J 2205/06 Flexible foams
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 9/0038 containing phosphorus
• CPC Class Codes: C08K 5/0066 Flame-proofing or flame-retarding additives
• CPC Class Codes: C08K 5/523 with hydroxyaryl compounds
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C09K 21/12 containing phosphorus

Abstract

The present invention relates to a process for producing flame-retarded polyurethane foams, in particular flexible polyurethane foams, using halogen-free flame retardants, wherein the resulting flame-retarded polyurethane foams exhibit low emission values coupled with good mechanical properties. The present invention further relates to halogen-free flame retardants.

Claims

1. A flame-retarded polyurethane foam obtainable by reacting a reaction mixture comprising a component which comprises

a) at least one compound which comprises isocyanate-reactive hydrogen atoms,

b) water and/or a physical blowing agent,

c) auxiliary and additive substances,

d) at least one halogen-free flame retardant comprising

d.2) a phosphoric ester of formula (II)

2. The flame-retarded polyurethane foam as claimed in claim 1, wherein the polyurethane foam is a flexible polyurethane foam.

3. An article comprising the polyurethane foam as claimed in claim 1 in the automobile, construction and/or furniture industries.

4. The article of claim 3, wherein said article comprises an automobile part, a construction part or a furniture part.