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Spray-in latex foam for sealing and insulating

A technology for spraying foam and latex, applied in the field of foam latex, which can solve problems such as expensive and time-consuming, downtime of insulation contractors, equipment blockage, etc.

Inactive Publication Date: 2010-03-24
OWENS CORNING INTELLECTUAL CAPITAL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such preventive measures are expensive and time-consuming
[0008] Yet another problem with such conventional polyurethane spray foams is that the reaction of the isocyanate in the "A" side and the polyol in the "B" side is a "two part" proportional quantitative reaction which requires complex equipment during the formation and application of the foam
The problem with such foam is that it often clogs equipment, making it time consuming to clean up
Additionally, dismantling the guns can take a significant amount of downtime for the insulation contractor as it may take time to resolve clogging issues

Method used

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  • Spray-in latex foam for sealing and insulating
  • Spray-in latex foam for sealing and insulating
  • Spray-in latex foam for sealing and insulating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0061]According to an exemplary embodiment of the present invention, carbon dioxide is included as a gaseous coagulant and brought to high pressure (eg 100-500 psi) so that it dissolves in the whey (ie water) phase. In the inventive spray foam latex, carbon dioxide reacts with aqueous ammonia to produce carbamate. It should be noted that carbon dioxide was mixed with the latex system to set it and was not used to cure the latex after application.

[0062] The advantages of using carbon dioxide in the spray foam latexes of the present invention are numerous. For example, latex generally requires expensive chemicals and heat treatment for curing. However, the carbon dioxide used in spray foam latex is a low cost, relatively safe chemical. According to at least one embodiment of the present invention, carbon dioxide is used to foam and coagulate the latex, thereby eliminating the need for more expensive chemicals and heat treatments. The elimination of expensive chemicals and ...

Embodiment 1

[0090] Example 1: Styrene Butadiene Foam Latex Composition

[0091] Table 1

[0092]

[0093] In this example, the latex system included an SBR latex emulsion. Usually ammonia is already part of the latex emulsion; however, in this example it is shown as a separate component. As previously discussed, ammonia was used to adjust the pH of the latex to produce a stable colloid. In addition to the SBR latex emulsion, the latex system in this example also included a thixotropic agent. It should be understood that although this example uses RD thixotropic clay, but other clays can be used in this example under conditions where the clay "freezes" the water structure when the carbon dioxide completes the setting of the latex. clay products. The latex system also includes potassium oleate as a foam booster, nano-sized graphite as an opacifier and zinc oxide as a foam stabilizer. Carbon dioxide is used as a gaseous coagulant, and air is used as a blowing agent.

Embodiment 2

[0094] Embodiment 2: polychloroprene foam latex composition

[0095] Table 2

[0096]

[0097] In this embodiment, the latex emulsion includes polychloroprene latex. In addition to the latex emulsion, the latex system in this example includes a thixotropic agent. The latex system also included zinc oxide as a foam stabilizer, and p,p'-dibenzoylquinone and sodium dibutyldithiocarbamate as accelerators for the setting process. Catechol acts as a gelling agent and accelerator. Foam stabilizers may contain C-cetyl betaine and wetting agents and sodium alkyl sulfates. Carbon dioxide and air are metered into the mixing head as gaseous coagulants. All B components can be encapsulated separately or together.

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Abstract

A spray latex foam for filling wall cavities to enhance the sealing and insulating properties of a building is provided. The spray latex foam includes a latex system and a gaseous coagulating component. In at least one exemplary embodiment, carbon dioxide is included as a gaseous coagulating agent. One latex suitable for use in the spray foam is polyvinylidene chloride (PVDC), which possesses fireretardancy and environmental durability. However, a preferred latex is styrene-butadiene rubber (SBR). The latex system may also include a thixotropic agent, such as Laponite<*>RD synthetic clay. Thespray latex foam is polyurethane-free. A method of preparing a spray latex foam that includes supplying a latex system and adding a gaseous coagulating component to the latex system is also provided.

Description

technical field [0001] The present invention relates generally to foam latexes, and more particularly to spray latex foams (spray latex foams) for filling wall cavities to improve the sealing and thermal insulation properties of buildings. A method of making a spray foam latex and a method of filling a cavity in a wall using the spray foam latex are also provided. Background technique [0002] Spray foam (spray foam) has found widespread use in the fields of thermal insulation and structural reinforcement. For example, spray foam is commonly used to insulate or impart structural strength to items such as automobiles, hot tubs, refrigerators, boats, and building structures. In addition, spray foams are used in applications such as furniture and bedding cushioning, undercarpet padding, acoustic materials, textile laminates, and energy absorbing materials. Currently, spray foams, especially those used as insulation or sealants for house walls, are polyurethane spray foams. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00
CPCC08L53/025C08L53/02C08J9/12C08K3/0033C08J2321/00C08K3/013C08L2666/02C08L21/02C08J9/08C08L9/08E04B2/34E04B1/88
Inventor R·J·奥利里M·L·科温-埃德森
Owner OWENS CORNING INTELLECTUAL CAPITAL LLC
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