Inherent flame retardant rigid polyurethane foam

Patent metadata

Field	Value
Publication number	US-9718937-B2
Application number	US-201415125378-A
Country	US
Kind code	B2
Filing date	Dec 5, 2014
Priority date	Mar 14, 2014
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

The present invention provides a kind of inherent flame retardant rigid polyurethane foam. The production formula comprises 100 to 105 pbw of polyether polyol and reactive phosphorus-containing flame retardant, 2.5 to 3.5 pbw of amine catalyst, 0.8 to 2.5 pbw of tertiary amine catalyst, 0.8 to 2.5 pbw of foam stabilizer, 0.5 to 1.5 pbw of blowing agent, 135 to 150 pbw of isocyanates, and 0.05 to 0.1 pbw of organo-metallic catalyst, wherein the reactive phosphorus-containing flame retardant is 9,10-dihydro-9-oxa-10-phosphaphenanthrene-4-hydroxybenzyl alcohol. The active monomers containing flame retarding elements are introduced into main chain and side chain of PU for modification, which permanently improves the flame retardancy of PU without obvious effect on other performance of PU matrix.

First claim

What is claimed is:

1. An inherent flame retardant rigid polyurethane foam synthesized from raw materials comprising:
(A) 100 to 105 pbw of polyether polyol and a reactive phosphorus-containing flame retardant, (B) 2.5 to 3.5 pbw of an amine catalyst, (C) 0.8 to 2.5 pbw of a tertiary amine catalyst, (D) 0.8 to 2.5 pbw of a foam stabilizer, (E) 0.5 to 1.5 pbw of a blowing agent, (F) 135 to 150 pbw of isocyanates, and (G) 0.05 to 0.1 pbw of an organo-metallic catalyst; wherein the reactive phosphorus-containing flame retardant is 9,10-dihydro-9-oxa-10-phosphaphenanthrene-4-hydroxybenzyl alcohol.

2. The inherent flame retardant rigid polyurethane foam according to claim 1 , wherein the weight ration of the polyether polyol and the reactive phosphorus-containing flame retardant is 10 to 90:10 to 90.

3. The inherent flame retardant rigid polyurethane foam according to claim 1 , wherein the polyether polyol is applicable to rigid polyurethane foam.

4. The inherent flame retardant rigid polyurethane foam according to claim 1 , wherein the amine catalyst is triethylenediamine.

5. The inherent flame retardant rigid polyurethane foam according to claim 1 , wherein the tertiary amine catalyst is 2,4,6-tris(dimethylaminomethyl)phenol.

6. The inherent flame retardant rigid polyurethane foam according to claim 1 , wherein the foam stabilizer is silicon-carbide-bond foam stabilizer.

7. The inherent flame retardant rigid polyurethane foam according to claim 1 , wherein the blowing agent is water.

8. The inherent flame retardant rigid polyurethane foam according to claim 1 , wherein the viscosity of the isocyanates is 150 to 250 mPa·s, and the isocyanates has a NCO content of 30.0 wt % to 32.0 wt %.

9. The inherent flame retardant rigid polyurethane foam according to claim 1 , wherein the organo-metallic catalyst is dibutyltin dilaurate.

Assignees

• Univ Xiamen

Inventors

• Dai Lizong
• Xie Cong
• Luo Wei'Ang
• Zeng Birong
• Xu Yiting
• Liu Xinyu
• He Kaibin
• Li Qi
• Li Yuanyuan
• Chen Xianming

Classifications

• C08J2201/022

  premixing or pre-blending a part of the components of a foamable composition, e.g. premixing the polyol with the blowing agent, surfactant and catalyst and only adding the isocyanate at the time of foaming · CPC title

• C08G18/1825

  having hydroxy or primary amino groups · CPC title

• C08J9/0061

  characterized by the use of several polymeric components · CPC title

• C08J9/0014

  Use of organic additives · CPC title

• C08J9/0052

  Organo-metallic compounds · CPC title