Endothermic coating for solar water heater

Abstract

The invention relates to an endothermic coating for a solar water heater. The coating is prepared from the following components in parts by weight: 33-42 parts of an acrylate modified composite emulsion, 1-3 parts of a silane coupling agent, 2-5 parts of titanium dioxide, 1-2 parts of organic bentonite, 8-14 parts of a curing agent, 43-62 parts of an absorbent, 13-17 parts of a solvent, 6-9 partsof a film-forming agent, 2-4 parts of a humidity-controlling agent, 4-8 parts of a dispersing agent, 2-4 parts of a thickening agent, 3-7 parts of dibutyl phthalate and 1-5 parts of acetone; and a plasticizer comprises the following components in parts by weight: 11-23 parts of phthalic anhydride acetate, 12-15 parts of polyvinyl chloride, 3-7 parts of ethylene glycol acetate, 13-23 parts of polyvinyl chloride, and 1-10 parts of ethylene glycol acetate. The prepared solar endothermic coating provided by the invention has the advantages of environmental protection, low costs, low plasticizing temperature, good binding performance, low residual viscosity, and stronger weather resistance.

Description

technical field

[0001] The invention relates to the field of solar energy, in particular to a heat-absorbing paint for a solar water heater. Background technique

[0002] Solar thermal application is one of the simplest, most direct, and most effective ways for human beings to utilize solar energy. However, due to the small and discontinuous energy density of solar energy after reaching the earth, it has brought difficulties to large-scale development and utilization. For a long time, how to convert low-grade solar energy into high-grade thermal energy and enrich solar energy so as to maximize the use of solar energy has become a hot topic of research. Among the existing photothermal application technologies, selective absorption coating technology is recognized as the core technology, which plays a vital role in improving the efficiency of solar thermal conversion and promoting large-scale solar thermal applications.

[0003] As we all know, solar energy absorbing coatings...

Examples

Embodiment 1

[0012] The solar water heater heat-absorbing coating of the present invention is made of the following components according to the proportion by weight:

[0013] 33 parts of acrylate modified composite emulsion, 1 part of silane coupling agent, 2 parts of titanium dioxide, 1 part of organic bentonite, 8 parts of curing agent, 43 parts of absorbent, 13 parts of solvent, 6 parts of film forming agent, 2 parts of humidity conditioner , 4 parts of dispersant, 2 parts of thickener, 3 parts of dibutyl phthalate, 1 part of acetone; the plasticizer includes the following components by weight: 11 parts of phthalic anhydride acetate, polychloride 12 parts of ethylene, 3 parts of ethylene glycol, 13 parts of polyvinyl chloride, 1 part of ethylene glycol.

[0014] In the above formula, the solvent includes at least two of propylene glycol, ethylene glycol, anhydrous butyl acetate or glycerin, and the acrylate modified composite emulsion consists of 7-8 parts of acrylate emulsion, 6-8 part...

Embodiment 2

[0016] The solar water heater heat-absorbing coating of the present invention is made of the following components according to the proportion by weight:

[0017] 42 parts of acrylate modified composite emulsion, 3 parts of silane coupling agent, 5 parts of titanium dioxide, 2 parts of organic bentonite, 14 parts of curing agent, 62 parts of absorbent, 17 parts of solvent, 9 parts of film forming agent, 4 parts of humidity conditioner , 8 parts of dispersant, 4 parts of thickener, 7 parts of dibutyl phthalate, 5 parts of acetone; the plasticizer includes the following components by weight: 23 parts of phthalic anhydride acetate, 15 parts of polyvinyl chloride, 7 parts of ethylene glycol, 23 parts of polyvinyl chloride, 10 parts of ethylene glycol.

[0018] In the above formula, the solvent includes at least two of propylene glycol, ethylene glycol, anhydrous butyl acetate or glycerin, and the acrylate modified composite emulsion consists of 7-8 parts of acrylate emulsion, 6-8 p...

Embodiment 3

[0020] The solar water heater heat-absorbing coating of the present invention is made of the following components according to the proportion by weight:

[0021] 37 parts of acrylate modified composite emulsion, 2 parts of silane coupling agent, 3 parts of titanium dioxide, 2 parts of organic bentonite, 11 parts of curing agent, 54 parts of absorbent, 15 parts of solvent, 8 parts of film-forming agent, 3 parts of humidity-conditioning agent , 6 parts of dispersant, 3 parts of thickener, 5 parts of dibutyl phthalate, 3 parts of acetone; the plasticizer includes the following components by weight: 17 parts of phthalic anhydride acetate, 13 parts of polyvinyl chloride, 5 parts of ethylene glycol, 18 parts of polyvinyl chloride, 5 parts of ethylene glycol.

[0022] In the above formula, the solvent includes at least two of propylene glycol, ethylene glycol, anhydrous butyl acetate or glycerin, and the acrylate modified composite emulsion consists of 7-8 parts of acrylate emulsion,...

technical field

[0001] The invention relates to the field of solar energy, in particular to a heat-absorbing paint for a solar water heater. Background technique

[0002] Solar thermal application is one of the simplest, most direct, and most effective ways for human beings to utilize solar energy. However, due to the small and discontinuous energy density of solar energy after reaching the earth, it has brought difficulties to large-scale development and utilization. For a long time, how to convert low-grade solar energy into high-grade thermal energy and enrich solar energy so as to maximize the use of solar energy has become a hot topic of research. Among the existing photothermal application technologies, selective absorption coating technology is recognized as the core technology, which plays a vital role in improving the efficiency of solar thermal conversion and promoting large-scale solar thermal applications.

[0003] As we all know, solar energy absorbing coatings...

Examples

Embodiment 1

[0012] The solar water heater heat-absorbing coating of the present invention is made of the following components according to the proportion by weight:

[0013] 33 parts of acrylate modified composite emulsion, 1 part of silane coupling agent, 2 parts of titanium dioxide, 1 part of organic bentonite, 8 parts of curing agent, 43 parts of absorbent, 13 parts of solvent, 6 parts of film forming agent, 2 parts of humidity conditioner , 4 parts of dispersant, 2 parts of thickener, 3 parts of dibutyl phthalate, 1 part of acetone; the plasticizer includes the following components by weight: 11 parts of phthalic anhydride acetate, polychloride 12 parts of ethylene, 3 parts of ethylene glycol, 13 parts of polyvinyl chloride, 1 part of ethylene glycol.

[0014] In the above formula, the solvent includes at least two of propylene glycol, ethylene glycol, anhydrous butyl acetate or glycerin, and the acrylate modified composite emulsion consists of 7-8 parts of acrylate emulsion, 6-8 part...

Embodiment 2

[0016] The solar water heater heat-absorbing coating of the present invention is made of the following components according to the proportion by weight:

[0017] 42 parts of acrylate modified composite emulsion, 3 parts of silane coupling agent, 5 parts of titanium dioxide, 2 parts of organic bentonite, 14 parts of curing agent, 62 parts of absorbent, 17 parts of solvent, 9 parts of film forming agent, 4 parts of humidity conditioner , 8 parts of dispersant, 4 parts of thickener, 7 parts of dibutyl phthalate, 5 parts of acetone; the plasticizer includes the following components by weight: 23 parts of phthalic anhydride acetate, 15 parts of polyvinyl chloride, 7 parts of ethylene glycol, 23 parts of polyvinyl chloride, 10 parts of ethylene glycol.

[0018] In the above formula, the solvent includes at least two of propylene glycol, ethylene glycol, anhydrous butyl acetate or glycerin, and the acrylate modified composite emulsion consists of 7-8 parts of acrylate emulsion, 6-8 p...

Embodiment 3

[0020] The solar water heater heat-absorbing coating of the present invention is made of the following components according to the proportion by weight:

[0021] 37 parts of acrylate modified composite emulsion, 2 parts of silane coupling agent, 3 parts of titanium dioxide, 2 parts of organic bentonite, 11 parts of curing agent, 54 parts of absorbent, 15 parts of solvent, 8 parts of film-forming agent, 3 parts of humidity-conditioning agent , 6 parts of dispersant, 3 parts of thickener, 5 parts of dibutyl phthalate, 3 parts of acetone; the plasticizer includes the following components by weight: 17 parts of phthalic anhydride acetate, 13 parts of polyvinyl chloride, 5 parts of ethylene glycol, 18 parts of polyvinyl chloride, 5 parts of ethylene glycol.

[0022] In the above formula, the solvent includes at least two of propylene glycol, ethylene glycol, anhydrous butyl acetate or glycerin, and the acrylate modified composite emulsion consists of 7-8 parts of acrylate emulsion,...