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Delay action catalyst for improving the stability of polyurethane systems having halogen containing blowing agent

A foaming agent, reactive technology, applied in the field of catalyst composition, can solve problems such as accelerating epoxy resin curing

Inactive Publication Date: 2014-05-07
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tetramethylguanidine octanoate is an aliphatic salt and has temperature-dependent drawbacks when used to cure elastomeric polyurethane polymers
This method has the disadvantages of requiring ground solids, and the composition requires dicyandiamide to accelerate the curing of the epoxy resin

Method used

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  • Delay action catalyst for improving the stability of polyurethane systems having halogen containing blowing agent
  • Delay action catalyst for improving the stability of polyurethane systems having halogen containing blowing agent
  • Delay action catalyst for improving the stability of polyurethane systems having halogen containing blowing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Example 1: Evaluation of formulations containing conventional amine catalysts in the presence of trans-1-chloro-3,3,3-trifluoropropene HFO as a blowing agent

[0086] A conventional polyurethane formulation can be used to prepare foams according to methods known in the art, and the polyurethane formulation has been added with a urethane catalyst containing one or more alkyl tertiary amines. The amount of polyisocyanate used in the polyurethane formulation according to the present invention is not limited, but will generally be within those ranges known to those skilled in the art. Exemplary ranges are given in the table, expressed by reference to "NCO Index" (Isocyanate Index). As known in the art, the NCO index is defined as the number of isocyanate equivalents divided by the total number of active hydrogen equivalents, multiplied by 100. The NCO index is expressed by the following formula.

[0087] NCO index=[NCO / (OH+NH)]×100.

[0088] In some embodiments of the present i...

Embodiment 2

[0097] Example 2: Evaluation of formulations containing sterically hindered amine catalysts and functionalized tertiary amine catalysts with NCO reactive groups in the presence of HFO blowing agent trans-1-chloro-3,3,3-trifluoropropene

[0098] In this example, for Polycat The evaluation of -12 (typically hindered tertiary amine) is used to illustrate the benefits and shortcomings of this type of compound using spray rigid foam formulation B. In addition, in this example, DABCO The performance of -T is shown as an example of typical tertiary amines with OH groups (NCO reactive groups) commonly used in spray foam applications.

[0099] Table 2-Spray rigid foam formulation B

[0100] Component

Parts by weight (pphp)

1 Polyester polyol

70

2 Mannich Polyol

30

3 Surfactant (LK443)

2.0

4 Foaming agent

20

Water

1.5

Amine catalyst

Variable

5 Metal catalyst

1.0

[0101] 6 Trimerization catalyst (TMR7)

0.1-10

Flame retardant (2-chloropropyl phosphate)

30.0

Polyme...

Embodiment 3

[0110] Example 3: Using HFO as the blowing agent trans-1-chloro-3,3,3-trifluoropropene, in the presence of standard organic monocarboxylic acids, evaluation of sterically hindered amine catalysts and NCO reactive groups Formulation of functionalized tertiary amine catalyst

[0111] In this example, in the presence of organic monocarboxylic acids, the sterically hindered tertiary amine catalyst Polycat -12 and OH-containing tertiary amine catalyst DABCO -T.

[0112]

[0113]

[0114]

[0115] Will have Polycat -12 and DABCO The premix mixture of -T and acid was stored at 50°C and samples were taken every seven days to determine the ability and kinetics of the aged premix B to produce polyurethane foam. The kinetics and polymerization parameters of the aged premix were measured and compared with the data from the unaged premix. The data shows that DABCO -T combined with monocarboxylic acid relative to free DABCO -T helps to improve stability. However, the stability of the sys...

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PUM

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Abstract

Catalyst compositions useful in the production of insulating polyurethane or polyisocyanurate foam are disclosed. The catalyst compositions impart increased stability of a mixture of the catalyst, a halogen-containing blowing agent, and a polyol. These catalyst compositions include amine / acid salts with a pH of < 7.0 which can be used in combined with tertiary amine catalysts and metal-based or ammonium-based trimerization catalyst and at least one metal-based gel catalyst and optionally one or more of an additional catalyst described in (1) or (2). These improved catalysts can be used with any halogenated blowing agent, and provide substantial stability benefits with the use of hydrofluoroolefins and hydrofluorochloroolefins. In an exemplary embodiment, a process includes providing a pre-mix comprising an organic carboxylic di-acid, tri-acid or poly-acid component and contacting a tetraalkylguanidine and / or a tertiary amine containing an isocyanate reactive group with the acid component in the pre-mix to form a mixture of tetraalkylguanidine salt or tertiary amine salt or their combination.

Description

[0001] Cross reference to related applications [0002] This application claims the rights of U.S. Application No. 61 / 717690 filed on October 24, 2012. The disclosure of said application No. 61 / 717690 is incorporated herein by reference. Background of the invention [0003] The field of the invention is the composition and application of catalysts for the production of insulating polyurethane foams produced with halogen-containing blowing agents. [0004] Polyurethane foam compositions are generally prepared by reacting isocyanates with a premix, which is composed of isocyanate reactive components (eg, polyols). The premix optionally also contains other components, such as water, flame retardants, blowing agents, foam stabilizing surfactants, and catalysts, which promote the reaction of isocyanate with polyols to prepare urethane, and the reaction with water to prepare CO 2 And urea, and react with excess isocyanate to prepare isocyanurate (trimer). The blowing agent in the premix ...

Claims

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Application Information

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IPC IPC(8): C08G18/32C08G18/34C08G18/67C08G18/18C08J9/14
CPCC08G18/4027C08J9/147C08G18/5021C08G18/1858C08G2105/02C08G18/546C08G18/225C08J9/125C08J9/149C08G2101/0025C08J9/144C08G18/1825C08G18/092C08G18/227C08J9/146C08J9/02C08J2201/022C08J2203/162C08J2205/052C08J2205/10C08J2207/04C08J2375/04C08G2110/0025C08G2115/02C08G18/1833C08G18/2027C08G18/34
Inventor J·J·伯德纽克J·L·文森特安江匡生T·J·米勒R·J·科勒
Owner AIR PROD & CHEM INC
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