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Blowing agents, foamable compositions and foams

一种发泡剂、组合物的技术，应用在形成聚合物泡沫的组合物领域，能够解决影响性质、高扩散速率、加工问题等问题

Active Publication Date: 2015-04-29
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blowing agents with a higher vapor pressure will generally also have a higher diffusion rate, which can present processing issues and affect properties such as permeability

Method used

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  • Blowing agents, foamable compositions and foams
  • Blowing agents, foamable compositions and foams
  • Blowing agents, foamable compositions and foams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 - Blowing Agent Properties

[0037] Blowing agents are generally expected to have certain basic environmental and toxicological properties. A summary of information on certain physical properties of certain blowing agents is provided in Table 1 below. The term HBA-2 as used herein is a code designation for trans-HCFO-1233zd.

[0038]

[0039] *2007 Technical Brief. Climate Change 2007: The Physical Science Basis. Report of Working Group I for the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.

[0040] Initial testing phases of trans HFO-1234ze and HFCO-1233zd indicated that the toxicological properties were acceptable, and the data indicated that toxicity was not an issue for commercial use of 1234ze(E) or HBA-2 as blowing agents.

[0041] The vapor pressure of a spray foam polyol blend is influenced by many factors, such as the type of polyol(s), the surfactants and blowing agents used, and their respective concentrations. ...

Embodiment 2

[0049] A second set of data was generated using the same conventional spray foam apparatus as described for Comparative Example 2A, using the same approximately 6 wt% HFC-245fa blowing agent in the low pressure polyol vessel. However, in addition, approximately 10 wt% of a blowing agent comprising trans-HFO-1234ze (based on the weight of the high-pressure polyol component stream) was added to the high-pressure polyol stream via a syringe pump, and the combined stream was introduced into the injection device , no intermediate mixing device is used. The substantially homogeneous mixture enters the spray device and produces acceptable foam. The process conditions used for the experiments are summarized in Table 2 below under the heading "1234ze / 245fa".

[0050]

[0051] The results of this test indicate that 1234ze(E) is readily soluble in a high pressure polyol stream and can be processed well through a spray gun without the use of intermediate mixing devices. The foam has ...

Embodiment 3

[0054] Commercially processed spray foam samples of HFCO-1233zd were evaluated for long-term aging performance, solubility in the foam matrix, and use as a blend with 245fa. In the spray foam industry, a lambda value of 6 months aging is generally considered. Table 4 below contains a summary of the formulations used in this long-term aging study. Foams prepared for this study were sprayed under the processing conditions given in Table 5. The data in Exhibit 7 show that HBA-2 and 245fa foams aged at equivalent rates and HBA-2 foams sprayed through industrial equipment still exhibit better aged lambda values ​​than the 245fa foams tested.

[0055]

[0056]

[0057] An analytical procedure is used that allows estimation of the total amount of blowing agent in the foam and the distribution of blowing agent throughout the foam. This included estimating the blowing agent content in the foam cells from the total cell gas content, and calculating the theoretical level of blowi...

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PUM

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Abstract

A method of forming foam comprising: (a) providing at least a first relatively high pressure liquid comprising a first reactive component; (b) introducing into said relatively high pressure stream a liquid blowing agent composition comprising 1,3,3,3-tetrafluoropropene (HFO-1234ze) and / or HFCO-1233zd to produce a second stream at relatively high pressure and containing said blowing agent; and (c) mixing at least a portion of said third stream with a fourth stream containing a component reactive with said first component to produce a mixed reactive stream.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Application No. 61 / 374,978, filed August 18, 2010, which is incorporated herein by reference. field of invention [0003] The present invention relates to compositions, methods and systems having utility as blowing agents, foamable compositions and foams (materials), including compositions, systems and methods for forming polymeric foams. Background of the invention [0004] Blowing agents are widely used in the preparation of foamed products. In some typical arrangements, the blowing agent and reactive base polymer or polymer precursor are provided under pressure and then injected, extruded through a die, or expanded into the die at lower pressure. [0005] Reactive chemical foam compositions, such as curable polyurethane foams, are presently known and used in many different applications. Curable foam compositions generally comprise a two-part system,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/04C08J9/14C08K5/02B01F17/00C09K23/00
CPCB29C44/3446C08J2203/142C08J2203/162C08J2203/182C08J2203/202C08J2375/04C08J9/143C08G18/4018C08G2110/005
Inventor M. C. 博丹M. 罗斯D. J. 威廉斯C. P. 吉特耶
Owner HONEYWELL INT INC