JPS61281080A - Manufacture of heat-resistant, weather-resistant and water-repellant glass wool formed body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a water-repellent molded glass wool plate with excellent heat resistance and weather resistance suitable for sound absorption, heat insulation, etc. (Conventional Technique #I) Conventionally, Glass wool/I/molded plates, which have weather resistance and water repellency and are made by mixing glass fibers with phenol resin, silane coupling agent, and silicone resin and molding the mixture under heat and pressure, are well known.

(Problems to be solved by the invention) The silicone resin in the conventional glass wool molded plate with the above-mentioned weather resistance and carbonaceous metal has excellent water repellency, but in terms of weather resistance, it decomposes against strong acids and alkalis. For example, if you use it outdoors where it is exposed to polluted air containing sulfur dioxide gas, chlorine, etc. for a long time! ! is gradually,
Sulfuric acid and hydrochloric acid dissolved in the rainwater may act on the rainwater, reducing its original water repellency and weather resistance. Furthermore, although silicone resin A is originally said to be relatively resistant to oxidation and ultraviolet rays, it is desirable to obtain a glass wool molded plate that provides even more oxidation and ultraviolet resistance over a long period of time. Furthermore, when taking into consideration all aspects such as use exposed to sunlight and high heat in engine rooms, etc., it would be preferable if a glass wool molded plate with even more heat resistance could be produced. The device uses the conventional glass wool bottom plate, reduces the use of silicone resin, which has the drawbacks mentioned above, maintains sufficient water repellency, and can withstand exposure to polluted air, direct sunlight, high heat, etc. This method provides a method for manufacturing glass wool molded plates that are stable and can maintain excellent weather resistance and heat resistance for many years, and is a mixture of glass fiber, phenolic resin, silane coupling agent, and silicone resin. The liquid is sprayed onto glass fibers with 7 to 15% by weight of phenol resin, 0.03 to 0.2% by weight of silane coupling agent, and 0.03 to 0.1% by weight of silicone resin. At the same time, add 0.2 to 0.5 liters of solid content of a separate fluororesin solution to the glass fibers.
It is characterized by spray adhesion of i1% and then pressure molded with t7JIIM.

(Example) Next, an example of the present invention will be explained. First, glass was made into fibers by centrifugation, spraying, etc. to create the following material, and this glass fiber was mixed with an aqueous solution of phenolic resin and a silane coupling agent. The silicone resin is completely mixed and the solution is 7 to 15% solids based on the glass fiber.
phenolic resin, 0.03 to 0.2% by weight of a silane coupling agent, and 0.05 to 0.1331% of a silicone resin are sprayed and attached using a spray gun, etc., and a fluororesin prepared separately is used alone. The liquid is applied to glass fibers by spraying with a solid content of 0.2 to 0.5% by weight using a spray gun, etc., which is made into a web of a predetermined thickness, which is then conveyed into a heating furnace to be heated and hardened. At the same time, a glass wool molded plate with a certain thickness and density is manufactured using pressurized solar power. Thereafter, it is cut into an appropriate length, or bent into a cylindrical body, etc., to form a bulky molded plate for insulation, sound absorption, etc., depending on the purpose.

If the addition of phenol resin is less than 7% by weight, it will be difficult to maintain the shape of the glass fiber molded plate after molding, and if it exceeds 10,015% by weight, the irregularly shaped product will tend to be hard. It is also uneconomical. Silane coupling agent[
If it is less than 0.03%, the mutual adhesion strength between the glass fiber and the phenol resin will be opaque, and it will be less than 0.2%.
%, the present invention particularly uses a combination of silicone resin and fluororesin to minimize the amount of each added 71111, economically superior heat resistance and weather resistance, and water-retaining glass wool molded plate T-manufacture. Therefore, silicone resin and fluororesin exhibit their effects at a minimum amount of 0.03% by weight and 0.2% by weight, respectively, and the maximum amount added is 0.1% by weight and 0% by weight, respectively. .5% by weight is sufficient, and even more is effective, but the cost is high) Is it foolish to be uneconomical?
In particular, if the amount of fluororesin increases, it will look bad when pasting a cover paper on top of it, so keep it within the above range! Melt.

According to the manufacturing method of the present invention, in this case, the fluororesin is not mixed because of the above-mentioned additives, but is separately sprayed onto the glass fibers by being mixed with the above-mentioned mixed solution and sprayed into a layer. Many experiments have shown that this product is undesirable due to its partially reduced heat resistance and weather resistance.

The phenol*fat is preferably a water-soluble resin, but may be an emulsion type or a urea-added type. As the silane coupling agent, for example, gamma-aminopropyltriethoxysilane is preferable. Any fluororesin such as polytetrafluoroethylene can be used.

Specific Example A solution of a phenol resin aqueous solution, a silane coupling agent, and a silicone resin is completely mixed onto glass fibers prepared by centrifugation using a spray gun. , a silane coupling agent of 0.07% and a silicone resin of 0.06% by weight are uniformly deposited on the entire surface, and then a separate solution of fluororesin prepared separately, for example, perfluoroacrylic acid ester/1 is applied.
A liquid consisting of 50% ethylene glycol and water is sprayed over the entire surface of the emulsion using a spray gun to uniformly adhere the solid content of 0.06% to the glass fibers, and then this is applied to the glass fibers. The heat-resistant fiber web of the present invention is formed into a fiber web, introduced into a heating furnace, heated at 200°C, and pressed with a pressure roller to have a density of 32'Kg/m' and a thickness of 50mm.
Weather resistance (7111) A water-repellent glass wool G-shaped plate was manufactured.For comparison, a phenolic resin, a silane coupling agent, and a silicone resin were mixed with glass fiber of the same weight as in the above-mentioned example, and a soil aqueous solution was sprayed. Spray the entire surface with a gun and apply 7-Nol resin 12% of the solid content to the glass fiber.
Excluding weight, 0.07% of silane cagging agent and 1% of silicone resin were uniformly deposited, and then this was formed into a whole glass fiber web, introduced into a heating furnace, and heated at 200°C to obtain 7JO.
Density: 32kg/m's Thickness: 50m by pressing with a pressure roller
A weather-resistant, water-repellent glass wool molded plate was manufactured.

In a water spray test, both had the same water repellency (tm), water absorption rate (t) of 15% by weight, and water adhesion. In this test, the sample was set at an angle of 45 degrees on a 200 x 200" sample, and water equivalent to a rainfall of 200"/h was continuously sprayed from a spray gun for 168 hours, and the water absorption rate was measured.

However, in order to compare their weather resistance, an accelerated exposure test was conducted as follows, and as a result, significant differences were observed as shown below.

That is, the temperature was 52℃ on the weather meter, and the temperature was 210r.
nl/ILL+) Conditional water? During irradiation for 1120 minutes, 18 dispersion water 7a-soo~1000 cycles were performed.

As a result, the comparative product showed a whitening and blistering phenomenon on the surface of the gradually formed plate, whereas the actual product showed no change at all. In addition, tests were conducted in an atmosphere containing extremely small amounts of SO, OL, etc., and it was found that the whitening and blistering phenomena of comparative products were further accelerated.

(Effects of the Invention) As described above, the present invention provides a method in which a mixed solution of a phenol resin, a silane coupling agent, and a silicone resin is sprayed on glass fibers, and a fluororesin solution is separately sprayed on the glass fibers, and Since each additive is added to the glass fiber in the amount specified above, expensive silicone can be avoided! It is possible to economically obtain a water-repellent glass fiber cedar sheet metal that is homogeneous throughout and particularly excellent in heat resistance and weather resistance by minimizing the total amount of fat and fluororesin used.

Claims (1)

[Claims] 1. A mixed solution consisting of a phenol resin, a silane coupling agent, and a silicone resin is added to the glass fiber in a solid content of 7 to 15% by weight of the phenol resin and 0.
．． 03-0.2% by weight of silane coupling agent and 0.0
Spraying 3 to 0.1% by weight of silicone resin and spraying 0.2 to 0.5% by weight of a separately prepared fluororesin solution onto glass fibers. A method for producing a water-repellent glass wool molded plate with excellent heat resistance and weather resistance, which is characterized by: