Flexible, open-cell thermoset foams and blowing agents and methods for making same

A thermosetting, foaming agent technology, used in other household appliances, household appliances, household components, etc., to solve problems such as foam splitting

Inactive Publication Date: 2017-02-22
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in both cases, the use of increased water can cause other problems such as foam splitting, i.e. considerable openings or voids in the surface and / or interior of the foam

Method used

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  • Flexible, open-cell thermoset foams and blowing agents and methods for making same
  • Flexible, open-cell thermoset foams and blowing agents and methods for making same
  • Flexible, open-cell thermoset foams and blowing agents and methods for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Open cell flexible polyurethane foam was formed using the same procedure and materials shown above for the control, except that four samples were made and for each sample, the blowing agent was modified to include an amount of hair booster such that the total blowing agent had the following concentration Foaming agent HFCO-1233zd(E), while the total weight of water in the formulation remains constant:

[0110] Foaming agent weight% Mole % water 50.72 88.14 HFCO-1233ZD(E) 49.28 11.86

[0111] The foam thus produced was tested and found to have the following average physical properties and comparisons to controls:

[0112] Control Example 1 %Variety Density, PCF 2.23 1.95 -12.4 Compression set (at 45-50°C) 13.969 12.21 -12.6 IFD 25% 125 101 -19.2 IFD 65% 330 250 -24.24 Tensile strength, psi 15.37 13.75 -10.54 Elongation 88.8 101.9 14.75

Embodiment 2

[0114] Open-cell flexible polyurethane foam was formed using the same procedure and materials shown above for the control, except that five samples were made and for each sample, the blowing agent was modified to include HFC-245fa as co-blowing agent in an amount such that HFC -245fa is present in the same molar amount as the co-blowing agent in Example 1 as follows:

[0115] Foaming agent weight% Mole % water 49.96 88.14 HFC-245fa 50.04 11.86

[0116] The foam thus produced was tested and found to have the following average physical properties and comparisons to controls: Control Example 2 %Variety Density, PCF 2.23 1.99 -10.7 Compression set (at 45-50°C) 13.969 14.55 4.13

Embodiment 3

[0118] Open-cell flexible polyurethane foam was formed using the same procedure and materials shown above for the control, except that three samples were made and for each sample, the blowing agent was modified to include HFC-365mfc / HFC227ea as co-blowing agent (at 93 / 7 relative weight ratio) and in an amount such that the co-foaming agent exists in the same molar amount as the co-foaming agent in Example 1 as follows:

[0119] Foaming agent weight% Mole % water 47.21 88.14 HFC-365mfc / 227ea 52.79 11.86

[0120] The foam thus produced was tested and found to have the following average physical properties and comparisons to controls:

[0121] Control Example 3 %Variety Density, PCF 2.23 1.95 -12.6

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Abstract

Disclosed are methods and compositions for forming a flexible, open cell viscoelastic foams which utilize a thermosetting composition comprising one or more components capable of forming a thermoset matrix and a blowing agent comprising at least one chemical blowing agent, such as water, and at least one physical blowing agent selected from the group consisting of trans-l-chloro-3,3,3-trifluoropropene (HFCO-1233zd(E)), 1,1,1,3,3-pentafluoropropane (HFC- 245fa); 1,1,1,3,3-pentafluorobutane (365mfc), blends consisting essentially of at least about 80% of HFC-365mfc and 1,1,1,2,3,3,3-heptafluoropropane (227ea), and combinations of any two or more of these.

Description

[0001] field of invention [0002] The present invention relates to improved open cell flexible thermoset foams and compositions and methods for forming such foams. [0003] Background of the invention [0004] One of the most common thermoset flexible foams is polyurethane foam. Such foams are generally prepared by reacting polyisocyanates with active hydrogen-containing compounds, such as polyols, in the presence of blowing agents and other optional ingredients. [0005] Catalysts are used to facilitate the two main reactions used to make this foam. One reaction is primarily the chain-extending isocyanate-hydroxyl reaction or gelling reaction by which hydroxyl-containing molecules react with isocyanate-containing molecules to form urethane linkages. Proceeding with this reaction increases the viscosity of the mixture and generally facilitates the formation of crosslinks with multifunctional polyols (ie, polyols having a nominal functionality above 2). The second main react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08J9/12C08L75/12
CPCC08G18/1825C08G18/1833C08G18/4072C08G18/4816C08G18/4829C08G18/4841C08G18/632C08G18/6674C08G18/7621C08G18/7664C08J9/144C08J2203/142C08J2203/162C08J2203/182C08J2205/05C08J2205/06C08J2300/24C08J2375/04C08G2110/0008C08G2110/0016B29C44/60C08G18/06C08G18/14C08G18/7685B29K2075/00B29K2105/045B29L2031/58
Inventor R.S.格罗斯曼P.梅塔
Owner HONEYWELL INT INC
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