阅读说明：本技术 一种景观仿石及其制备方法 (Landscape imitation stone and preparation method thereof ) 是由 亓峰 姜深生 王宝利 于 2019-10-14 设计创作，主要内容包括：本发明涉及一种景观仿石及其制备方法,属于仿石制备技术领域。解决了现有技术中天然石头为材料的景观石浪费资源、密度大、运输难,以及仿石为材料的景观石头逼真度较差,重量也很大的技术问题。本发明景观仿石制备方法,先在真石上涂抹脱模剂,采用液相硅胶制备真石的翻制模具；然后在翻制模具的内表面涂抹脱模剂后,喷涂或刷涂改性聚氨酯材料,固化,脱模,得到真石硬模；再在真石硬模内腔中填充聚氨酯发泡料,固化；最后在真石硬模外表面喷涂仿石涂料,烘干,得到景观仿石。该景观仿石效果逼真,质感好,质量轻,耐湿性、耐紫外、抗寒耐热性好,使用寿命长；该制备方法简便快捷,造价低,节约真石材,可加工成各种复杂石体,应用广泛。(the invention relates to a landscape imitation stone and a preparation method thereof, belonging to the technical field of imitation stone preparation. The landscape stone material solves the technical problems that in the prior art, the landscape stone made of natural stones wastes resources, has high density and is difficult to transport, and the landscape stone made of stone imitation materials has poor fidelity and large weight. The invention relates to a landscape imitation stone preparation method, which comprises the steps of firstly coating a release agent on real stone, and preparing a real stone reproduction mould by adopting liquid phase silica gel; then coating a release agent on the inner surface of the copy mould, spraying or brushing a modified polyurethane material, curing, and demoulding to obtain a real stone hard mould; filling polyurethane foaming materials into the inner cavity of the real stone hard die, and curing; and finally, spraying stone-like coating on the outer surface of the real stone hard die, and drying to obtain the landscape stone-like product. The landscape stone imitation effect is vivid, the texture is good, the weight is light, the moisture resistance, the ultraviolet resistance, the cold resistance and the heat resistance are good, and the service life is long; the preparation method is simple, convenient and quick, has low cost, saves real stone, can be processed into various complex stone bodies, and has wide application.)

1. The landscape stone imitation preparation method is characterized by comprising the following steps:

Coating a release agent on the real stone, and preparing a real stone reproduction mould by adopting liquid phase silica gel;

Step two, after smearing a release agent on the inner surface of the copy mould, spraying or brushing a modified polyurethane material, curing and demoulding to obtain a real stone hard mould;

The modified polyurethane material consists of 100 weight parts of polyether polyol, 60 to 80 weight parts of polyisocyanate, 8 to 30 weight parts of glass fiber, 0.2 to 0.5 weight part of curing accelerator, 0.01 to 0.02 weight part of nano silicon dioxide, 0.2 to 0.3 weight part of titanium dioxide, 5 to 10 weight parts of compatilizer, 0.5 to 1 weight part of lubricant, 0.1 to 0.5 weight part of antioxidant, 0.05 to 1.5 weight parts of dispersant and 20 to 40 weight parts of solvent;

step three, filling polyurethane foaming materials in the inner cavity of the real stone hard die, and curing;

fourthly, spraying stone-like coating on the outer surface of the real stone hard die, and drying to obtain landscape stone-like;

The stone-like coating comprises 70-80 parts by weight of waterborne polyurethane resin, 10-15 parts by weight of natural latex, 5-8 parts by weight of natural colored sand, 2-3 parts by weight of polyacrylate emulsion, 2-10 parts by weight of pigment, 1-2 parts by weight of defoaming agent, 0.5-1 part by weight of ultraviolet resistant agent, 2-5 parts by weight of diethylene glycol monobutyl ether, 1-3 parts by weight of sodium dodecyl benzene sulfonate, 1-3 parts by weight of anti-settling agent and 2-6 parts by weight of flame retardant.

2. the method for preparing landscape imitation stone according to claim 1, wherein in the first step, the release agent is a silica gel release agent.

3. the method for preparing landscape imitation stone according to claim 1, wherein in the second step, the release agent is a polyurethane release agent.

4. The method for preparing landscape imitation stone according to claim 1, wherein in the second step, the polyether polyol is one or more of polyethylene glycol ether and polypropylene glycol ether; the polyisocyanate is one or a mixture of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate; the curing accelerator is dibutyltin dilaurate; the compatilizer is a hydrogenated thermoplastic styrene-butadiene rubber-maleic anhydride graft or a thermoplastic styrene-butadiene rubber-maleic anhydride graft; the lubricant is zinc stearate, sodium stearate or aluminum stearate; the antioxidant is octadecyl beta (3, 5-di-tert-butyl-4 hydroxyphenyl) propionate or pentaerythritol beta (3, 5-di-tert-butyl-4 hydroxyphenyl) propionate; the dispersant is fatty acid, fatty amide, ester, paraffin or low molecular wax; the solvent is ethyl acetate, butyl acetate, acetone, cyclohexanone, xylene or trimethylbenzene.

5. The method for preparing landscape imitation stone according to claim 1, wherein in the third step, the polyurethane foaming material is a two-component polyurethane foaming material.

6. The preparation method of the landscape imitation stone of claim 1, wherein in the third step, the curing temperature of the polyurethane foaming material is 10-40 ℃, and the complete curing time is 2-6 h.

7. The method for preparing the landscape imitation stone of claim 1, wherein in the fourth step, the pigment is one or a mixture of more of titanium dioxide, iron oxide red, chrome yellow, phthalocyanine blue, phthalocyanine green, chromium green, aluminum powder and carbon black; the defoaming agent is an organic silicon defoaming agent; the anti-ultraviolet agent is UV-531 or UV-9; the anti-settling agent is organic bentonite; the flame retardant is one or a mixture of aluminum oxide, aluminum hydroxide, magnesium hydroxide and ammonium polyphosphate.

8. the method for preparing landscape imitation stone according to claim 1, wherein in the fourth step, the drying temperature is below 50 ℃.

9. The method for preparing landscape imitation stone according to claim 1, wherein in the fourth step, after spraying the imitation stone paint, one or more operations of color matching, painting, splashing, wiping and color bouncing are carried out on the landscape imitation stone.

10. The landscape imitation stone prepared by the landscape imitation stone preparation method of any one of claims 1-9.

Technical Field

the invention belongs to the technical field of stone imitation material preparation, and particularly relates to a landscape stone imitation and a preparation method thereof.

Background

with the acceleration of urban construction, an elegant living environment is created for people, the spiritual enjoyment and the material enjoyment of people are improved, and the landscape design is more and more emphasized. Landscape stones are used more and more frequently in landscape design, such as patios, lawn paths, swimming pool peripheries, railings, villa foundations, pavilions, porches and other buildings, which need to be decorated and beautified.

The existing landscape stone mainly takes natural stones in nature as main materials, and is mostly granite, slate, sandstone and cobble. Although the authenticity of natural stones is good, the stones are non-renewable resources, along with continuous mining, the stone resources are less and less, and the natural stones have the defects of large dead weight, inconvenience in transportation and hoisting and the like due to large density.

In order to solve this problem, stone imitation has been developed. The existing stone imitation manufacturing method mainly comprises the steps of firstly manufacturing a landscape stone mould, then pouring cement paste into the mould, and then demoulding to obtain the stone imitation. But the expansion of cement easily damages the mould, and the fidelity is poor, and the weight is also very big.

disclosure of Invention

In view of the above, the invention provides a landscape stone imitation and a preparation method thereof, aiming at solving the technical problems that in the prior art, the landscape stone made of natural stone wastes resources, has high density and is difficult to transport, and the landscape stone made of stone imitation is poor in fidelity and high in weight.

The technical scheme adopted by the invention for solving the technical problems is as follows.

The invention provides a landscape stone imitation preparation method, which comprises the following steps:

coating a release agent on the real stone, and preparing a real stone reproduction mould by adopting liquid phase silica gel;

Step two, after smearing a release agent on the inner surface of the copy mould, spraying or brushing a modified polyurethane material, curing and demoulding to obtain a real stone hard mould;

The modified polyurethane material consists of 100 weight parts of polyether polyol, 60 to 80 weight parts of polyisocyanate, 8 to 30 weight parts of glass fiber, 0.2 to 0.5 weight part of curing accelerator, 0.01 to 0.02 weight part of nano silicon dioxide, 0.2 to 0.3 weight part of titanium dioxide, 5 to 10 weight parts of compatilizer, 0.5 to 1 weight part of lubricant, 0.1 to 0.5 weight part of antioxidant, 0.05 to 1.5 weight parts of dispersant and 20 to 40 weight parts of solvent;

step three, filling polyurethane foaming materials in the inner cavity of the real stone hard die, and curing;

fourthly, spraying stone-like coating on the outer surface of the real stone hard die, and drying to obtain landscape stone-like;

The stone-like coating comprises 70-80 parts by weight of waterborne polyurethane resin, 10-15 parts by weight of natural latex, 5-8 parts by weight of natural colored sand, 2-3 parts by weight of polyacrylate emulsion, 2-10 parts by weight of pigment, 1-2 parts by weight of defoaming agent, 0.5-1 part by weight of ultraviolet resistant agent, 2-5 parts by weight of diethylene glycol monobutyl ether, 1-3 parts by weight of sodium dodecyl benzene sulfonate, 1-3 parts by weight of anti-settling agent and 2-6 parts by weight of flame retardant.

Preferably, in the first step, the release agent is a silica gel release agent.

Preferably, in the second step, the release agent is a polyurethane release agent.

preferably, in the second step, the polyether polyol is one or a mixture of polyethylene glycol ether and polypropylene glycol ether; the polyisocyanate is one or a mixture of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate; the curing accelerator is dibutyltin dilaurate; the compatilizer is a hydrogenated thermoplastic styrene-butadiene rubber-maleic anhydride graft or a thermoplastic styrene-butadiene rubber-maleic anhydride graft; the lubricant is zinc stearate, sodium stearate or aluminum stearate; the antioxidant is octadecyl beta (3, 5-di-tert-butyl-4 hydroxyphenyl) propionate or pentaerythritol beta (3, 5-di-tert-butyl-4 hydroxyphenyl) propionate; the dispersant is fatty acid, fatty amide, ester, paraffin or low molecular wax; the solvent is ethyl acetate, butyl acetate, acetone, cyclohexanone, xylene or trimethylbenzene.

Preferably, in the third step, the polyurethane foaming material is a two-component polyurethane foaming material.

Preferably, in the third step, the curing temperature of the polyurethane foaming material is 10-40 ℃, and the complete curing time is 2-6 h.

preferably, in the fourth step, the pigment is one or a mixture of more of titanium dioxide, iron oxide red, chrome yellow, phthalocyanine blue, phthalocyanine green, chrome green, aluminum powder and carbon black; the defoaming agent is an organic silicon defoaming agent; the anti-ultraviolet agent is UV-531 or UV-9; the anti-settling agent is organic bentonite; the flame retardant is one or a mixture of aluminum oxide, aluminum hydroxide, magnesium hydroxide and ammonium polyphosphate.

Preferably, in the fourth step, the drying temperature is below 50 ℃.

Preferably, in the fourth step, after the stone-like paint is sprayed, one or more operations of color matching, brushing, splashing, wiping and color bouncing are further performed on the landscape stone-like paint.

The invention also provides the landscape imitation stone prepared by the landscape imitation stone preparation method.

Compared with the prior art, the invention has the beneficial effects that:

1. The landscape stone imitation of the invention has the advantages of vivid effect, good texture, light weight, good moisture resistance, ultraviolet resistance, cold resistance and heat resistance and long service life.

2. The landscape imitation stone has the advantages of simple and quick preparation method, low manufacturing cost, saving of real stone, reduction of stone exploitation, large plasticity, capability of being processed into various complex stone bodies and wide application.

Drawings

FIG. 1 is a process flow diagram of the landscape imitation stone preparation method of the invention.

FIG. 2 is a photograph of landscape stone imitation prepared by the landscape stone imitation preparation method of the invention.

Detailed Description

For a further understanding of the invention, preferred embodiments of the invention are described below in conjunction with the detailed description, but it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the claims of the invention.

As shown in figure 1, the landscape stone imitation preparation method of the invention comprises the following steps:

Coating a release agent on the real stone, and preparing a real stone reproduction mould by adopting liquid phase silica gel;

Step two, after smearing a release agent on the inner surface of the copy mould, spraying or brushing a modified polyurethane material, curing and demoulding to obtain a real stone hard mould;

step three, filling polyurethane foaming materials in the inner cavity of the real stone hard die, and curing;

And fourthly, spraying a stone-like coating on the outer surface of the real stone hard die, and drying to obtain the landscape stone-like.

in the technical scheme, in the step one, the liquid-phase silica gel is a frequently-used mold turning material for technicians in the field, and generally comprises silica gel and a curing agent, wherein the curing agent mainly comprises tetraethoxysilane and organic tin; the silica gel and the curing agent are mixed when in use, the mixing ratio is generally 100g of silica gel to 2-5g of curing agent, the curing agent amount is increased, a mold can be hardened and become brittle, the curing agent amount is too small, the operation time can be prolonged, and the curing time is generally 2-4h (25 ℃) under the mixing ratio. Liquid phase silica gels are commercially available, such as the red leaf silica gel HY-6 series. The release agent may be a silica gel release agent, and is commercially available to those skilled in the art.

in the above technical scheme and step two, the release agent can be polyurethane release agent, and is various and commercially available to those skilled in the art. The modified polyurethane material consists of 100 weight portions of polyether polyol, 60 to 80 weight portions of polyisocyanate, 8 to 30 weight portions of glass fiber, 0.2 to 0.5 weight portion of curing accelerator, 0.01 to 0.02 weight portion of nano silicon dioxide, 0.2 to 0.3 weight portion of titanium dioxide, 5 to 10 weight portions of compatilizer, 0.5 to 1 weight portion of lubricant, 0.1 to 0.5 weight portion of antioxidant, 0.05 to 1.5 weight portions of dispersant and 20 to 40 weight portions of solvent. Wherein the polyether polyol is one or a mixture of polyethylene glycol ether and polypropylene glycol ether. The polyisocyanate is one or more of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate. The curing accelerator is dibutyltin dilaurate. The compatilizer is a hydrogenated thermoplastic styrene-butadiene rubber-maleic anhydride graft or a thermoplastic styrene-butadiene rubber-maleic anhydride graft. The lubricant is zinc stearate, sodium stearate or aluminum stearate. The antioxidant is octadecyl beta (3, 5-di-tert-butyl-4 hydroxyphenyl) propionate or pentaerythritol beta (3, 5-di-tert-butyl-4 hydroxyphenyl) propionate. The dispersant is fatty acid, fatty amide, ester, paraffin or low molecular wax. The solvent is ethyl acetate, butyl acetate, acetone, cyclohexanone, xylene or trimethylbenzene. The preparation method of the modified polyurethane material can be as follows: firstly, polyether polyol and polyisocyanate are reacted (the temperature is generally 75-90 ℃, and the reaction time is 2-3h), after the temperature is reduced, glass fiber is added and stirred uniformly, then nano silicon dioxide, titanium dioxide, a compatilizer, a lubricant, an antioxidant, a dispersant and a solvent are added and stirred uniformly, finally, a curing accelerator is added and stirred uniformly, and the modified polyurethane material is obtained after defoaming.

In the above technical scheme, in step three, the polyurethane foam material is the prior art, and can be obtained commercially, such as a two-component polyurethane foam material, or can be prepared in a laboratory, such as an elastomer disclosed in the synthesis of polyurethane-urea-imide elastomer by spraying in the literature (polyurethane industry, volume 28 of 2016, phase 4, ark, etc.). The preparation method is characterized by preferably adopting a commercially available two-component polyurethane foaming material which is a common industrial raw material and usually consists of a black material and a white material, wherein the black material is isocyanate, the white material is combined polyether and is formed by combining a polyether monomer, a foam homogenizing agent, a cross-linking agent, a catalyst, a foaming agent and other components, and a flame retardant, a toughening agent and the like can be contained, the black material and the white material are mixed when in use, the mixing mass ratio of the black material to the white material of the hard foam is generally required to be 1:1, the mixture is sprayed or filled into a mold after being uniformly stirred, and the mixture can rapidly expand and is subjected to a curing reaction with air or moisture in a contacted matrix to form foam. The curing temperature of the polyurethane foaming material is 10-40 ℃, and the complete curing time is 2-6 h.

according to the technical scheme, in the fourth step, the stone-like coating is composed of 70-80 parts by weight of waterborne polyurethane resin, 10-15 parts by weight of natural latex, 5-8 parts by weight of natural colored sand, 2-3 parts by weight of polyacrylate emulsion, 2-10 parts by weight of pigment, 1-2 parts by weight of defoaming agent, 0.5-1 part by weight of ultraviolet resistant agent, 2-5 parts by weight of diethylene glycol monobutyl ether, 1-3 parts by weight of sodium dodecyl benzene sulfonate, 1-3 parts by weight of anti-settling agent and 2-6 parts by weight of flame retardant. Wherein the pigment is one or more of titanium dioxide, iron oxide red, chrome yellow, phthalocyanine blue, phthalocyanine green, chrome green, aluminum powder and carbon black. The defoaming agent is an organic silicon defoaming agent. The ultraviolet resistant agent is UV-531 or UV-9. The anti-settling agent is organic bentonite. The flame retardant is one or a mixture of aluminum oxide, aluminum hydroxide, magnesium hydroxide and ammonium polyphosphate. The preparation method of the stone-like coating comprises the steps of taking the components according to the proportion, stirring and mixing the components uniformly, and defoaming, wherein the mixing sequence can be adjusted according to actual conditions. In order to avoid influencing the color of the pigment, the drying temperature in the fourth step is generally below 50 ℃.

According to the technical scheme, after the stone-like coating is sprayed, the landscape stone-like coating can be selectively treated further according to needs, so that the effect is more real, such as color matching, brushing, splashing, wiping, color popping and the like.

the invention also provides the landscape imitation stone prepared by the landscape imitation stone preparation method.

the present invention is further illustrated by the following examples.