Polyurethane foam premixes containing halogenated olefin blowing agents and foams made from same

a technology of halogenated olefin and polyurethane, which is applied in the field of polyurethane and polyisocyanurate foams, can solve the problems of undesirable increase in reactivity time, inconvenient use, and undesirable effects, and achieves the effect of improving the cream time, improving the front-end catalytic reactivity, and improving the cream tim

Inactive Publication Date: 2014-06-19
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]Applicants have found that in certain embodiments a substantial advantage can be achieved in foams, foamable compositions, foam premixes, and associated methods and systems, by the selection of a catalyst system which includes a bismuth-based catalyst. Applicants have surprisingly, and unexpectedly, found that effective amounts of such catalysts result in

Problems solved by technology

If a surfactant is not used in the foaming composition, in many cases the bubbles simply pass through the liquid mixture without forming a foam or forming a foam with large, irregular cells rendering it not useful.
However, applicants have found that if the polyol premix composition containing certain halogenated olefin blowing agents, including in particular 1234ze(E) and 1233zd(E), and a typical amine-containing catalyst is aged, prior to treatment with the polyisocyanate, deleterious effects can occur.
For example, applicants have found that such formulations can produce a foam

Method used

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  • Polyurethane foam premixes containing halogenated olefin blowing agents and foams made from same
  • Polyurethane foam premixes containing halogenated olefin blowing agents and foams made from same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055]To evaluate the front-end reactivity of metal catalysts, a resin with a formulation in Table 1 was prepared. Various metal catalysts, including bismuth, cobalt, tin, zinc, manganese, titanium, zirconium iron, were tested in the polyol preblend. The polyol blend (50° F.) was then reacted with equal amount of isocyanate Lupranate M20 at 70° F. The cream time was recorded and was based on the interval of time between mixing together the polyol and diisocyante and the change in the color of the liquid as the mixture begins to rise.

TABLE 1ComponentPhppTerate 402060Voranol 470X30Voranol 36010Antiblaze AB 8010PHT-4-Diol3Water2.5Dabco DC 1931.51233zd (E)12Metal catalyst3

[0056]As evident from FIG. 1, the first seven catalysts tested (all bismuth-based catalysts) all have cream times below those of the other metal catalysts tested. Only bismuth catalysts showed a cream time of around 5 seconds. All other metal catalysts produced a reaction with a cream time longer than 10 seconds. This ...

example 2

[0057]Bismuth catalysts also display good stability in well-designed resin system. The following experiments which used Toyocat DM70 as the gelling catalysts which is not a front-end catalyst, and Dabco K15 as the trimer catalyst which is good for back-end cure, along with the bismuth catalysts (Table 2).

[0058]The initial reactivity of such resin system was measured by reacting the freshly prepared resin at 50° F. with equal amount of isocyanate Lupranate M20 at 70° F. The aged reactivity was measured similarly, e.g. by reacting the resin (50° F.) which has been aged at room temperature for a predetermined time, with Lupranate M20 at 70° F.

TABLE 2ComponentPhppTerate 402060Voranol 470X30Voranol 36010Antiblaze AB 8010PHT-4-Diol3Water2.2Dabco DC 1931.5Toyocat DM 703K 151Bismuth catalyst0.51233zd (E)12

[0059]As illustrated in FIG. 2, the results showed bismuth catalysts such as Pucat 25, U600H, Bicat 8106, K-KAT XC C227 has shown excellent stability in the catalyst package used the resin...

example 3

[0060]Example 2 is repeated using Dabco MB20, Bicat 8, and Bicat 8210. The initial reactivity of such resin system is measured by reacting the freshly prepared resin at 50° F. with equal amount of isocyanate Lupranate M20 at 70° F. The aged reactivity is measured similarly, by reacting the resin (50° F.) which is aged at room temperature for a predetermined time, with Lupranate M20 at 70° F.

[0061]The results show that the bismuth catalysts Dabco MB20, Bicat 8, and Bicat 8210 exhibit stability in the catalyst package that is within commercially tolerable levels and also that reactivity is maintained after aging.

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Abstract

Disclosed are polyol premix compositions, and foams formed therefrom, which comprise a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a catalyst system that includes a bismuth-based metal catalyst. Such catalysts may be used alone or in combination with an amine catalyst and/or other non-amine catalysts.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority to U.S. Provisional Application Ser. No. 61 / 769,324, filed Feb. 26, 2013, the contents of which are incorporated herein by reference in its entirety.[0002]The present application is a continuation-in-part of U.S. application Ser. No. 13 / 400,559, filed Feb. 20, 2012, which claims the priority benefit of each of U.S. Provisional Application No. 61 / 494,868, filed Jun. 8, 2011, U.S. Provisional Application No. 61 / 445,027, filed Feb. 21, 2011, and U.S. Provisional Application No. 61 / 445,022, filed Feb. 21, 2011, each of which is incorporated herein by reference in its entirety as if fully set forth below.[0003]The present application is also a continuation-in-part of U.S. application Ser. No. 13 / 491,534, filed Jun. 7, 2012, which claims the priority benefit of U.S. Provisional Application No. 61 / 494,868, filed Jun. 8, 2011, each of which is incorporated herein by reference in its entirety as if fully set...

Claims

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Application Information

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IPC IPC(8): C08G18/06
CPCC08G18/06C08G18/163C08G18/1808C08G18/1816C08G18/222C08G18/227C08G18/4018C08G18/4208C08G18/482C08G18/5021C08G18/7664C08G2101/00C08J9/02C08J9/144C08J9/146C08J2201/022C08J2203/162C08J2375/04
Inventor YU, BINWILLIAMS, DAVID J.
Owner HONEYWELL INT INC
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