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Pressure canned single-component polyurethane foam capable of being sprayed on surface and preparation method and application thereof

A technology of polyurethane foam and surface spraying, applied in the field of single-component polyurethane foam, can solve the problems of inability to achieve spraying, difficult to carry, complicated operation, etc., and achieve the effects of stable properties, easy portability and simple operation

Active Publication Date: 2020-06-19
成都高端聚合物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pressure canned one-component polyurethane foam that can be sprayed on the surface. The low viscosity and high pressure of the one-component polyurethane foam can be realized through a reasonable formula. Cooperating with a glue gun with a spray head, spraying can be realized, and small volume can be realized. The aerosol can filling can also realize the filling of large-volume pressure-resistant steel cans, so as to solve the problem that the existing one-component polyurethane foam sealant cannot be sprayed, and the two-component polyurethane foam is not easy to carry and the operation is complicated (need special spray gun, pressurized equipment), and is suitable for large-area and large-scale spraying, and it is inconvenient for small-area and small-scale spraying

Method used

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  • Pressure canned single-component polyurethane foam capable of being sprayed on surface and preparation method and application thereof
  • Pressure canned single-component polyurethane foam capable of being sprayed on surface and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The pressure canned surface-sprayable single-component polyurethane foam of the present invention and its preparation method, according to the 1# formula in Table 1, 67g flame-retardant polyester polyol RB-79, 10g polyether polyol 204, 98g liquid flame retardant TCPP, 28g of liquid flame retardant DMMP, 15g of foam stabilizer XH-1880, and 3g of catalyst DMDEE were mixed uniformly to obtain 221g of combined polyether. Then add 221g combined polyether and 297g polymethylene polyphenylisocyanate M20S into a 750ml aerosol can, seal the valve, pour in 48g blowing agent dimethyl ether, shake and mix for 5 minutes, and place it at room temperature to cool to After standing at room temperature for 24 hours, add 64g of booster propane to get this product. Then use a glue gun with a spray head to spray on the cardboard to form a 2-3cm thick foam, and cure for 72 hours.

[0055] After testing, the viscosity of polyurethane prepolymer glue is 1125mPa.s at 50°C, the pressure inside...

Embodiment 2

[0057] Press 2# formula in table 1, with 59g flame retardant polyester polyol RB-79, 8g polyester polyol PS-2352, 50g liquid flame retardant TCPP, 33g liquid flame retardant DMMP, 21g liquid flame retardant TEP, 61g of expandable graphite, 13.3g of foam stabilizer AK-88759, and 2.7g of catalyst DMDEE were mixed uniformly to obtain 248g of composite polyether. Add 248g combined polyether and 270g polymethylene polyphenylisocyanate M20S into a 750ml aerosol can, seal the valve, pour in 48g blowing agent dimethyl ether, shake and mix for 5 minutes, and place it at room temperature to cool to After standing at room temperature for 24 hours, add 64g of booster propane to get this product. Then use a glue gun with a spray head to spray on the cardboard to form a 2-3cm thick foam, and cure for 72 hours.

[0058] After testing, the viscosity of the polyurethane prepolymer glue is 1250mPa.s at 50°C, the pressure inside the aerosol can is 0.72Mpa at 21°C, and the foam density after spr...

Embodiment 3

[0061] According to the 3# formula (same as formula 1#) in Table 1, the product is obtained, and it is shot out with a general single-component polyurethane foam caulking agent glue gun (without a nozzle), and the glue liquid that is shot out is strip-shaped and cannot be atomized. Less than surface sprayable effect.

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Abstract

The invention discloses pressure canned single-component polyurethane foam capable of being sprayed on the surface and a preparation method and application thereof. The single-component polyurethane foam comprises the following components: a low-viscosity polyurethane prepolymer glue solution, a foaming agent and a pressurizing agent, the low-viscosity polyurethane prepolymer glue solution is formed by reacting combined polyether and polymethylene polyphenyl isocyanate, the combined polyether comprises polyhydric alcohols, a flame retardant, a foam stabilizer and a catalyst, the polyhydric alcohols are polyhydric alcohols with low functionality and low hydroxyl value, and the pressurizer is gas with the pressure of more than or equal to 0.70 MPa at 21 DEG C. According to the invention, lowviscosity and high pressure of the single-component polyurethane foam are realized through a reasonable formula, by matching with a glue gun (pipe) with a spray head, spraying can be realized, not only small-size aerosol can filling be realized, but also large-size steel can filling can be realized, and the defects that an existing single-component polyurethane foam joint mixture cannot be sprayed and double-component polyurethane foam is inconvenient to spray in a small-area and small-range manner are overcome.

Description

technical field [0001] The invention relates to the field of one-component polyurethane foam, in particular to a pressure-packed surface-sprayable one-component polyurethane foam, a preparation method and an application thereof. Background technique [0002] One-component polyurethane foam sealant is a special polyurethane foam product filled in a pressure tank. It has been widely used in joint filling, sealing, heat insulation, bonding, sound insulation, etc. (Can) packaging, easy to carry, easy to use, environmental protection and energy saving sealing material. However, the glue that the common one-component polyurethane foam sealant is shot out by the glue gun is a continuous glue strip rather than a mist, and can only be used for hole filling in buildings and vehicle objects or between objects (such as doors, windows and walls) Body) gap filling and sealing, can not be used for surface insulation, heat insulation, sound insulation atomization spraying of walls, vehicle...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08G18/42C08L75/08C08L75/06C08L91/06C08K5/521C08K9/00C08K3/04C08J9/14C08J9/00
CPCC08G18/7664C08G18/4018C08G18/48C08G18/42C08G18/4202C08J9/142C08J9/141C08J9/146C08J9/0038C08J9/009C08J9/0095C08J2203/12C08J2203/14C08J2203/142C08J2375/08C08J2375/06C08J2491/06
Inventor 王东毛建军辜建勇
Owner 成都高端聚合物科技有限公司
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