Reflective heat-insulation modified acrylic waterproof coating and preparation method thereof

Abstract

The invention discloses a reflective heat-insulation modified acrylic waterproof coating and a preparation method thereof; the waterproof coating comprises the following components in parts by weight:10-50 parts of modified pure acrylic emulsion, 10-40 parts of nano metal doped titanium dioxide, 5-20 parts of water, 5-30 parts of other fillers and 0.5-3 parts of other auxiliaries. The reflectiveheat-insulation modified acrylic waterproof coating has excellent cracking resistance, stain resistance, tensile strength and light reflectivity.

Description

technical field

[0001] The invention belongs to the field of building waterproofing, and more specifically relates to a reflective heat insulation modified acrylic waterproof coating and a preparation method thereof. Background technique

[0002] Heat-insulating coatings are architectural coatings with energy-saving effects in architectural coatings. According to their heat-insulating mechanisms, there are mainly three types. (1) Barrier heat insulation coating resists heat transfer to achieve heat insulation. When preparing coatings, mainly select materials with low thermal conductivity and introduce air with low thermal conductivity after the coating is formed into a film. Commonly used heat-resistant fillers include hollow glass beads, hollow ceramic powder, hollow fibers, sepiolite, vermiculite, perlite, etc. (2) Heat-reflective heat-insulating coatings mainly reflect the spectral energy of sunlight at 400-1800nm. Its reflective material is nano material. (3) Radiati...

Examples

preparation example Construction

[0019] In the present invention, preferably, the preparation method of the modified pure acrylic emulsion further comprises: after adding the polytetrafluoroethylene emulsion, lowering the temperature to below 35°C, adding aqueous sodium hydroxide solution to adjust the pH to 8-9.5, and obtaining The modified pure acrylic emulsion.

[0020] According to the present invention, preferably, in step (1), in terms of parts by weight, the amount of butyl acrylate is 10-40 parts, the amount of acrylonitrile is 1-5 parts, and the amount of methacrylic acid is 0.1-40 parts. 0.5 parts, the consumption of the first emulsifier is 0.1-0.5 parts and the consumption of water is 5-10 parts;

[0021] In step (2), in parts by weight, the amount of the second emulsifier is 0.1-0.5 parts, the amount of water is 10-20 parts, the amount of initiator aqueous solution is 0.3-0.5 parts, the monomer pre-dispersed The consumption of body A is 30-50 parts, the consumption of methacrylic acid is 0.5-2 pa...

preparation example 1

[0047] Take 40 parts of butyl acrylate, 2 parts of acrylonitrile, 0.2 part of methacrylic acid and add 0.2 part of sodium dodecylsulfonate and 10 parts of water, and emulsify to obtain monomer predispersion A;

[0048] Add 15 parts of water and 0.2 parts of sodium dodecylsulfonate into the reactor and raise the temperature to 78°C, directly add 0.3 parts of an initiator aqueous solution with a mass concentration of 15%, and drop 45 parts of monomer predispersion A within 2 hours After the dropwise addition, keep it warm for 1 hour, then directly add 1 part of methacrylic acid, after swelling for 1 hour, start to drop 3 parts of polytetrafluoroethylene emulsion with a solid content of 60%, and drop it completely within 1 hour; lower the temperature to 35°C, add a 2% sodium hydroxide aqueous solution to adjust the pH to 9, and obtain a 55% solid content modified pure acrylic emulsion; wherein, the initiator used to configure the initiator aqueous solution is sodium persulfate.

preparation example 2

[0050] Take 35 parts of butyl acrylate, 5 parts of acrylonitrile, 0.3 part of methacrylic acid, add 0.2 part of monocaprylic acid glyceride and 8 parts of water, and emulsify to obtain monomer predispersion A;

[0051] Add 17 parts of water and 0.1 part of glyceryl monocaprylate into the reactor and raise the temperature to 78°C, directly add 0.4 parts of an initiator aqueous solution with a mass concentration of 15%, drop 40 parts of monomer predispersion A within 2 hours, add dropwise Complete the heat preservation for 1 hour, then add 1.5 parts of methacrylic acid directly, after swelling for 1 hour, start to drop 6 parts of polytetrafluoroethylene emulsion with a solid content of 60%, and drop it completely within 1 hour; lower the temperature to 35°C , adding a mass concentration of 2% sodium hydroxide aqueous solution to adjust the pH to 9 to obtain a 54% solid content modified pure acrylic emulsion; wherein, the initiator used to configure the initiator aqueous solution ...

technical field

[0001] The invention belongs to the field of building waterproofing, and more specifically relates to a reflective heat insulation modified acrylic waterproof coating and a preparation method thereof. Background technique

[0002] Heat-insulating coatings are architectural coatings with energy-saving effects in architectural coatings. According to their heat-insulating mechanisms, there are mainly three types. (1) Barrier heat insulation coating resists heat transfer to achieve heat insulation. When preparing coatings, mainly select materials with low thermal conductivity and introduce air with low thermal conductivity after the coating is formed into a film. Commonly used heat-resistant fillers include hollow glass beads, hollow ceramic powder, hollow fibers, sepiolite, vermiculite, perlite, etc. (2) Heat-reflective heat-insulating coatings mainly reflect the spectral energy of sunlight at 400-1800nm. Its reflective material is nano material. (3) Radiati...

Examples

preparation example Construction

[0019] In the present invention, preferably, the preparation method of the modified pure acrylic emulsion further comprises: after adding the polytetrafluoroethylene emulsion, lowering the temperature to below 35°C, adding aqueous sodium hydroxide solution to adjust the pH to 8-9.5, and obtaining The modified pure acrylic emulsion.

[0020] According to the present invention, preferably, in step (1), in terms of parts by weight, the amount of butyl acrylate is 10-40 parts, the amount of acrylonitrile is 1-5 parts, and the amount of methacrylic acid is 0.1-40 parts. 0.5 parts, the consumption of the first emulsifier is 0.1-0.5 parts and the consumption of water is 5-10 parts;

[0021] In step (2), in parts by weight, the amount of the second emulsifier is 0.1-0.5 parts, the amount of water is 10-20 parts, the amount of initiator aqueous solution is 0.3-0.5 parts, the monomer pre-dispersed The consumption of body A is 30-50 parts, the consumption of methacrylic acid is 0.5-2 pa...

preparation example 1

[0047] Take 40 parts of butyl acrylate, 2 parts of acrylonitrile, 0.2 part of methacrylic acid and add 0.2 part of sodium dodecylsulfonate and 10 parts of water, and emulsify to obtain monomer predispersion A;

[0048] Add 15 parts of water and 0.2 parts of sodium dodecylsulfonate into the reactor and raise the temperature to 78°C, directly add 0.3 parts of an initiator aqueous solution with a mass concentration of 15%, and drop 45 parts of monomer predispersion A within 2 hours After the dropwise addition, keep it warm for 1 hour, then directly add 1 part of methacrylic acid, after swelling for 1 hour, start to drop 3 parts of polytetrafluoroethylene emulsion with a solid content of 60%, and drop it completely within 1 hour; lower the temperature to 35°C, add a 2% sodium hydroxide aqueous solution to adjust the pH to 9, and obtain a 55% solid content modified pure acrylic emulsion; wherein, the initiator used to configure the initiator aqueous solution is sodium persulfate.

preparation example 2

[0050] Take 35 parts of butyl acrylate, 5 parts of acrylonitrile, 0.3 part of methacrylic acid, add 0.2 part of monocaprylic acid glyceride and 8 parts of water, and emulsify to obtain monomer predispersion A;

[0051] Add 17 parts of water and 0.1 part of glyceryl monocaprylate into the reactor and raise the temperature to 78°C, directly add 0.4 parts of an initiator aqueous solution with a mass concentration of 15%, drop 40 parts of monomer predispersion A within 2 hours, add dropwise Complete the heat preservation for 1 hour, then add 1.5 parts of methacrylic acid directly, after swelling for 1 hour, start to drop 6 parts of polytetrafluoroethylene emulsion with a solid content of 60%, and drop it completely within 1 hour; lower the temperature to 35°C , adding a mass concentration of 2% sodium hydroxide aqueous solution to adjust the pH to 9 to obtain a 54% solid content modified pure acrylic emulsion; wherein, the initiator used to configure the initiator aqueous solution ...

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