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External drying assisting agent matched with polyurethane foam caulking agent and preparing method and application thereof

A polyurethane foam and desiccant technology, applied in the direction of polyurea/polyurethane adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the dry time of about 4-6 hours in season, and it needs to be around zero in winter It takes 24 hours or more to fully dry, long-term secondary corrections, time-consuming and labor-intensive problems, to achieve the effects of avoiding catalyst hydrolysis, accelerating dissolution speed, and rapid catalytic action

Active Publication Date: 2016-07-27
SHIJIAZHUANG DONGXIANG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface drying time of polyurethane foam at a room temperature of 20°C is generally within 10 minutes; the full drying time varies with the ambient temperature and humidity. Generally, the full drying time in summer is about 4-6 hours, and it takes about 24 hours in winter at zero degrees. It takes hours or more to fully dry, so it takes a long time to make secondary corrections after sizing, which is time-consuming and labor-intensive; especially when used in wet and cold environments, it has greater limitations and inconvenience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of the aerosol drying aid comprises the following steps:

[0025] A. Weigh the preservative, catalyst and water in proportion, add them to the reactor in order of preservative, water and catalyst and mix them, raise the temperature to no more than 30°C (the preferred temperature is 20~25°C), and stir well until the solution Clear;

[0026] B. Pour the drying aid solution prepared in step A into an aerosol can, press the valve, and inject the propellant gas to obtain the drying aid aerosol for external use.

[0027] The application of an external drying aid combined with a polyurethane foam caulking agent refers to the combined use of the external drying aid and a one-component polyurethane foam caulking agent.

[0028] There are two ways to use external drying aids in conjunction with polyurethane foam caulking agents:

[0029] (1) Mix the external drying aid into the foam produced by the polyurethane foam caulking agent, and then extrude the fo...

Embodiment 1

[0034] (1) An external drying aid aerosol combined with polyurethane foam caulking agent, including the following components:

[0035] Drying aid: Kathon preservative (5-chloro-2-methyl-4-isothiazolin-3-one) 7.5g, triethylenediamine catalyst 37.5g, distilled water 205g;

[0036] Projection gas: 30g of propane butane (the mass ratio of propane to butane is 1:2).

[0037] (2) The preparation method of the aerosol drying aid is:

[0038] A. Weigh the preservative, catalyst and distilled water, add the preservative, water and catalyst into the reactor and mix in sequence, raise the temperature to 20~25°C, and stir well until the solution is clear;

[0039] B. Use a 400ml tinplate aerosol can as a container, pour the drying aid solution in step A; press the valve, and pour in the propellant gas propane butane to obtain the drying aid aerosol for external use.

[0040] (3) Application of the external drying aid

[0041] The external drying aid aerosol is used in conjunction with ...

Embodiment 2

[0047] (1) An external drying aid aerosol combined with polyurethane foam caulking agent, including the following components:

[0048] Drying aid: Kathon preservative (5-chloro-2-methyl-4-isothiazolin-3-one) 15.6g, triethylenediamine catalyst 26g, distilled water 218.4g;

[0049] Projection gas: 20g of propane butane (the mass ratio of propane to butane is 1:4).

[0050] (2) The preparation method of the aerosol drying aid is:

[0051] A. Weigh the preservative, catalyst and distilled water, add the preservative, water and catalyst into the reactor and mix in sequence, control the temperature at 25±2°C, and stir well until the solution is clear;

[0052] B. Use a 400ml tinplate aerosol can as a container, pour the drying aid solution in step A; press the valve, and pour in the propellant gas propane butane to obtain the drying aid aerosol for external use.

[0053] (3) Application of the external drying aid

[0054] The external drying aid aerosol is used in combination wit...

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PUM

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Abstract

The invention discloses an external drying assisting agent matched with a polyurethane foam caulking agent and a preparing method and application thereof.The external drying assisting agent comprises, by mass, 3%-6% of preservative, 10%-20% of catalyst and the balance water; the external drying assisting agent is an aerosol, and further comprises casting gas, and the weight ratio of the drying assisting agent to the casting gas is 25:3.The preparing method includes the steps that A, the preservative, the catalyst and the water are weighed in proportion, and are fully dissolved to be clear; B, the drying assisting agent is poured into an aerosol can, a valve is pressed, and the casting gas is inflated.The external drying assisting agent is used in cooperation with the polyurethane foam caulking agent, and is not limited by environment conditions, polyurethane foam can be fully dried within 15 minutes, correction can be carried out while gluing, and efficiency is greatly improved; under catalyzing of the external drying assisting agent, the produced polyurethane foam is even, stable, free of treaded foam and cavities and good in sealing effect.

Description

technical field [0001] The invention relates to an external drying aid combined with a polyurethane foam caulking agent, a preparation method and application thereof, and belongs to the technical field of building materials. Background technique [0002] Polyurethane foam caulking agent, commonly known as foaming agent, PU caulking agent, is a moisture-curing, multi-purpose polyurethane foam filling elastic sealing material, which is filled with polyurethane prepolymer, foaming agent, catalyst and other components. Special polyurethane product in pressure-resistant aerosol cans. During construction, the aerosol colloid is sprayed to the site to be constructed through a matching sizing gun or a manual nozzle. The foamy polyurethane material expands rapidly and reacts with the air or the moisture in the substrate to form a foam, and the molding is completed in a short period of time. , Foaming, bonding and sealing process. Its cured foam elastomer has excellent properties su...

Claims

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Application Information

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IPC IPC(8): C08K5/47C08K5/17C08G18/48C08L75/08C09J11/04C09J175/08
CPCC08G18/4808C08K5/17C08K5/47C08L75/08C09J11/04C09J175/08
Inventor 步帅步贺
Owner SHIJIAZHUANG DONGXIANG CHEM CO LTD
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