CN110080524B - Building template release agent and building template thereof - Google Patents

Building template release agent and building template thereof Download PDF

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Publication number
CN110080524B
CN110080524B CN201810081184.7A CN201810081184A CN110080524B CN 110080524 B CN110080524 B CN 110080524B CN 201810081184 A CN201810081184 A CN 201810081184A CN 110080524 B CN110080524 B CN 110080524B
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component
release agent
layer
building template
resin
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CN110080524A (en
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李文忠
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G19/00Auxiliary treatment of forms, e.g. dismantling; Cleaning devices
    • E04G19/006Cleaning devices

Abstract

The invention provides a building template release agent and a building template, wherein the building template release agent comprises a component A and a component B, the component A comprises 20-80% of resin, 20-80% of solvent and 0-30% of first auxiliary agent according to weight percentage, and the component B comprises 70-100% of cyanoacrylate and 0-30% of second auxiliary agent. The building template comprises a substrate, and a primer layer and a demolding layer which are sequentially arranged on the surface of the substrate, wherein the primer layer and the demolding layer are respectively formed by drying a component A and a component B in a building template demolding agent. The building template release agent disclosed by the invention is two components, the two components can supplement each other in effect as the release agent, the acid and alkali resistance can be realized, the two components can be strongly adhered into a whole, the A component is acid and alkali resistant, the defects that a release layer formed by drying the B component is not acid and alkali resistant, pulverization and the like can be effectively prevented, the building template and concrete can be effectively separated, and the building template release agent can be repeatedly used for a long time.

Description

Building template release agent and building template thereof
Technical Field
The invention relates to the field of buildings, in particular to a building template release agent and a building template thereof.
Background
The concrete is formed by fixing the concrete by means of a template, and the template must be removed after the concrete has certain strength. Since the building formwork directly contacts with concrete, the building formwork is corroded, such as an aluminum formwork, thereby affecting the service life of the building formwork. Simultaneously, so be difficult to dismantle because of contacting with the concrete when the template is dismantled, and dismantle the easy concrete that remains in surface of back template, detach the in-process of concrete, need the manual work to clear away, greatly increased the human cost.
At present, release agents are available in the market, and can play a role in isolation and lubrication between a template and concrete by spraying or coating the release agents on the template so as to overcome the adhesive force between the template and the surface of the concrete and ensure that the concrete can be smoothly separated from the template when the template is removed. However, since the template after spraying or coating the release agent is contacted with alkaline concrete for a long time, the release agent and the concrete have some reactions to cause partial concrete residues, for example, grease components in the oily release agent are easily hydrolyzed by alkali under the alkaline condition of the concrete or are hydrolyzed by acid under the external acidic condition, that is, the release agent is not acid-resistant and pulverized, and the like, so that the release agent needs to be sprayed or coated again once.
Therefore, it is urgently required to provide a new mold release agent which can effectively release the template and can be used for a long time to solve the above problems.
Disclosure of Invention
The invention aims to provide a building template release agent and a building template thereof, which have good release effect and can be repeatedly used for a long time.
In order to achieve the purpose, the invention provides a building template release agent which comprises a component A and a component B, wherein the component A comprises 20-80% of resin, 20-80% of solvent and 0-30% of first auxiliary agent according to weight percentage, and the component B comprises 70-100% of cyanoacrylate and 0-30% of second auxiliary agent.
The invention also provides a building template which comprises a substrate, and a primer layer and a demolding layer which are sequentially arranged on the surface of the substrate, wherein the primer layer and the demolding layer are respectively formed by drying the component A and the component B in the building template demolding agent.
The building template release agent is a double-component, and comprises a component A and a component B, wherein resin in the component A has acid and alkali resistance, cyanoacrylate in the component B can quickly generate anionic polymerization under the action of a solvent of the component A and moisture in air to form a long and strong chain so as to realize solidification, and meanwhile, in the quick solidification process of the cyanoacrylate, active groups such as cyano and the like can react with the active groups of the resin in the component A, namely, partial substances in the two components react to form a bridge, so that the effects of the component A and the component B in the double-component can supplement each other, and the acid and alkali resistance and the strong adhesion of the two components are integrated. The building template formed by drying the A component and the B component is characterized in that a primer layer and a demolding layer which are respectively formed by the A component and the B component can be effectively twisted together due to reaction among partial substances in the A component and the B component, the A component is acid-alkali resistant, the defects of pulverization and the like caused by acid-alkali resistance of the demolding layer formed by drying the B component can be effectively prevented, meanwhile, the demolding layer formed by drying cyanoacrylate is compact, the adhesion is strong, the isolation effect and the lubricity are good, the building template can be effectively separated from concrete, and the building template can be repeatedly used for a long time.
Drawings
FIG. 1 is a schematic view of a building panel of the present invention.
Detailed Description
The technical solutions of the present invention are further illustrated by the following specific embodiments, but the present invention is not limited thereto.
The invention provides a building template release agent which comprises a component A and a component B, wherein the component A comprises 20-80% of resin, 20-80% of solvent and 0-30% of first auxiliary agent, and the component B comprises 70-100% of cyanoacrylate and 0-30% of second auxiliary agent. That is, the first aid and the second aid may or may not be present in the mold release agent, and the particular choice depends on the actual use.
Further, the resin includes natural resin and synthetic resin, and the combination of the two types of resin can simultaneously achieve high acid and alkali resistance of the natural resin and high adhesion of the synthetic resin.
The natural resin is selected from at least one of rosin, amber and shellac, and the synthetic resin is selected from at least one of styrene-butadiene copolymer, epoxy resin, phenolic resin and acrylate resin. Preferred natural and synthetic resins are in combination: rosin and styrene-butadiene copolymers or rosin and styrene-butadiene copolymers and epoxy resins. The rosin contains double bonds and carboxyl groups which can react with active groups of the styrene-butadiene copolymer and the epoxy resin, so that the rosin is prevented from being unstable to light, heat and oxygen due to the existence of the double bonds and the carboxyl groups with strong active groups, and has poor aging resistance and weather resistance, and is easy to generate chalking and discoloration phenomena.
The solvent includes hydrocarbon solvents and non-hydrocarbon solvents to match the resin including natural resins and synthetic resins. The hydrocarbon solvent is paint solvent oil, and the non-hydrocarbon solvent is selected from ethyl acetate, xylene, acetone, cycloethanone and styrene.
If the combination of natural resin and synthetic resin is: when rosin and styrene-butadiene copolymer, or rosin, styrene-butadiene copolymer and epoxy resin are used, the preferable hydrocarbon solvent and non-hydrocarbon solvent are respectively paint solvent oil and ethyl acetate, the paint solvent oil is selected to dissolve the rosin, the influence of crystallization of the rosin caused by poor solubility on the adhesiveness can be avoided, and the ethyl acetate is selected to effectively dissolve the styrene-butadiene copolymer and the epoxy resin.
The first auxiliary agent and the second auxiliary agent are respectively selected from at least one of thickening agent and tackifier. That is, the first aid and the second aid may be the same or different, and the particular choice depends on the combination of properties of the resin actually selected. The thickener is selected from methylcellulose, carboxymethylcellulose, hydroxyethyl cellulose, and hydroxypropyl methylcellulose. The viscosity increasing agent is selected from paraffin, xanthan gum, gelatin, and guar gum.
The cyanoacrylate is 2-methyl cyanoacrylate, which is easy to wet and penetrate, and the drying and curing process needs no heat or pressure.
The invention also provides a building template which comprises a substrate, and a primer layer and a demolding layer which are sequentially arranged on the surface of the substrate, wherein the primer layer and the demolding layer are respectively formed by drying the component A and the component B in the building template demolding agent. In practical use, the component A can be coated on the surface of a substrate (namely the surface of the substrate facing concrete) by spraying, printing, dipping and the like, a primer layer can be obtained after drying for a period of time at room temperature or under heating, partial solvent can still remain on the primer layer, the component B is coated on the surface of the primer layer by spraying, printing, dipping and the like, and cyanoacrylate in the component B can be rapidly dried and cured at room temperature to form a release layer. As can be seen from FIG. 1, the building template comprises a substrate 1, a primer layer 2 and a demolding layer 3 which are sequentially arranged on the surface of the substrate, wherein a thin interface layer 4 is formed between the primer layer and the demolding layer due to the reaction between partial substances in the A component and the B component, so that the primer layer and the demolding layer which are respectively formed by the A component and the B component can be effectively stranded together.
Of course, for different substrates, the substrate may be subjected to a pretreatment including cleaning, desmearing, polishing, etc. before the a component is applied.
The building formwork release agent and the building formwork of the present invention will be described in detail with reference to examples.
Example 1
A building template release agent comprises a component A and a component B, wherein the component A comprises 40% of rosin, 10% of styrene-butadiene copolymer, 25% of coating solvent oil and 25% of ethyl acetate according to weight percentage, and the component B comprises 90% of cyanoacrylate and 10% of hydroxyethyl cellulose.
Spraying the component A on the surface of a wooden template, drying for 2 hours at room temperature to form a primer layer, spraying the component B on the surface of the primer layer, and obtaining a cured and dried demolding layer after 1 min.
Example 2
A building template release agent comprises a component A and a component B, wherein the component A comprises 40% of rosin, 10% of styrene-butadiene copolymer, 25% of coating solvent oil and 25% of ethyl acetate according to weight percentage, and the component B comprises 90% of cyanoacrylate and 10% of hydroxyethyl cellulose.
Spraying the component A on the surface of a steel template, drying for 2 hours at room temperature to form a primer layer, spraying the component B on the surface of the primer layer, and obtaining a cured and dried demolding layer after 1 min.
Example 3
A building template release agent comprises a component A and a component B, wherein the component A comprises 40% of rosin, 10% of styrene-butadiene copolymer, 25% of coating solvent oil and 25% of ethyl acetate according to weight percentage, and the component B comprises 90% of cyanoacrylate and 10% of hydroxyethyl cellulose.
Spraying the component A on the surface of an aluminum template, drying at room temperature for 2h to form a primer layer, spraying the component B on the surface of the primer layer, and obtaining a cured and dried demolding layer after 1 min.
Example 4
A building template release agent comprises a component A and a component B, wherein the component A comprises 40% of shellac, 10% of styrene-butadiene copolymer, 25% of coating solvent oil, 20% of acetone and 5% of hydroxyethyl cellulose, and the component B comprises 90% of cyanoacrylate and 10% of hydroxyethyl cellulose.
Spraying the component A on the surface of an aluminum template, drying at room temperature for 2h to form a primer layer, spraying the component B on the surface of the primer layer, and obtaining a cured and dried demolding layer after 1 min.
Example 5
The building template release agent comprises a component A and a component B, wherein the component A comprises 20% of rosin, 15% of styrene-butadiene copolymer, 20% of epoxy resin, 25% of coating solvent oil and 20% of ethyl acetate according to weight percentage, and the component B comprises 90% of cyanoacrylate and 10% of hydroxyethyl cellulose.
Spraying the component A on the surface of an aluminum template, drying at room temperature for 2h to form a primer layer, spraying the component B on the surface of the primer layer, and obtaining a cured and dried demolding layer after 1 min.
Example 6
The building template release agent comprises a component A and a component B, wherein the component A comprises 35% of amber, 35% of phenolic resin, 15% of coating solvent oil and 15% of ethyl acetate according to weight percentage, and the component B comprises 70% of cyanoacrylate, 15% of hydroxyethyl cellulose and 15% of paraffin.
Spraying the component A on the surface of an aluminum template, drying at room temperature for 3h to form a primer layer, spraying the component B on the surface of the primer layer, and obtaining a cured and dried demolding layer after 2 min.
Example 7
The building template release agent comprises a component A and a component B, wherein the component A comprises 70% of rosin and 30% of coating solvent oil by weight percentage, and the component B comprises 80% of cyanoacrylate, 10% of hydroxyethyl cellulose and 10% of paraffin.
Spraying the component A on the surface of an aluminum template, drying at room temperature for 3h to form a primer layer, spraying the component B on the surface of the primer layer, and obtaining a cured and dried demolding layer after 2 min.
Example 8
The building template release agent comprises a component A and a component B, wherein the component A comprises 80% of epoxy resin and 20% of ethyl acetate in percentage by weight, and the component B comprises 80% of cyanoacrylate and 20% of hydroxyethyl cellulose.
Spraying the component A on the surface of an aluminum template, drying at room temperature for 2h to form a primer layer, spraying the component B on the surface of the primer layer, and obtaining a cured and dried demolding layer after 1 min.
Comparative example 1
The building formwork releasing agent consists of rosin 40 wt%, styrene-butadiene copolymer 10 wt%, paint solvent oil 25 wt% and ethyl acetate 25 wt%.
And spraying a release agent on the surface of the aluminum template, and drying for 2 hours at room temperature to obtain the aluminum template with the release agent.
Comparative example 2
A building template release agent comprises 90% of cyanoacrylate and 10% of hydroxyethyl cellulose in percentage by weight.
And spraying a release agent on the surface of the aluminum template, and drying for 2 hours at room temperature to obtain the aluminum template with the release agent.
The templates of examples 1 to 8 and comparative examples 1 to 2 were used to form concrete, demolish the concrete after the strength of the concrete was reached, and the template was used repeatedly until 200 times, and the topography of the template surface was recorded discontinuously, and the results are shown in table 1, and the topography was recorded as the residual amount of concrete on the template surface and the release agent falling-off.
As can be seen from Table 1, the residual amount of concrete on the surface of the template in examples 1 to 8 is lower than that in comparative examples 1 to 2, and the release agent is better in release, and particularly after being used for 3 times, the difference between the residual amount and the residual amount is obvious. The building template formed by drying the component A and the component B is proved by the release agent, because of the reaction between partial substances in the component A and the component B, a primer layer and a release layer respectively formed by the component A and the component B can be effectively twisted together, the component A is acid-base resistant, the defects of pulverization and the like of the release layer formed by drying the component B due to no acid-base resistance can be effectively prevented, meanwhile, the release layer formed by drying cyanoacrylate is compact, strong in adhesion, good in isolation effect and lubricity, capable of effectively separating the building template from concrete, capable of being used repeatedly for a long time, and free of any change in surface appearance after being used for 200 times.
Comparative examples 1 and 2 are layers formed by drying the components a and B alone, which, although they can isolate the form and the concrete to some extent and can release the concrete, the layer formed by drying the components a and B alone has significantly weakened adhesiveness and acid and alkali resistance with the increase of the number of times of use, and thus a large amount of concrete remains when the layer is used for the 3 rd time, and the release agent is released seriously.
TABLE 1 topography of the surface of each template of examples 1-8 and comparative examples 1-2
Figure BDA0001560352280000071
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications and alterations to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles disclosed herein.

Claims (10)

1. The building template release agent is characterized by comprising a component A and a component B, wherein the component A comprises 20-80% of resin, 20-80% of solvent and 0-30% of first auxiliary agent by weight percent, the component B comprises 70-100% of cyanoacrylate and 0-30% of second auxiliary agent by weight percent, a primer layer and a release layer can be respectively formed after the component A and the component B are dried, and a layer of interface layer is formed between the primer layer and the release layer by means of reaction between partial substances in the component A and the component B.
2. The building form mold release agent of claim 1, wherein the resin comprises a natural resin and a synthetic resin.
3. The building form mold release agent of claim 2, wherein the natural resin is selected from at least one of rosin, amber, and shellac.
4. The building form mold release agent of claim 2, wherein the synthetic resin is at least one selected from the group consisting of styrene-butadiene copolymer, epoxy resin, phenol resin, and acrylate resin.
5. The building form mold release agent of claim 2, wherein the solvent comprises a hydrocarbon solvent and a non-hydrocarbon solvent.
6. The building form mold release agent of claim 5, wherein the hydrocarbon solvent is a paint solvent oil.
7. The building form mold release agent of claim 5, wherein the non-hydrocarbon solvent is selected from the group consisting of ethyl acetate, xylene, acetone, cycloethanone, styrene.
8. The building form mold release agent of claim 1, wherein the first and second adjuvants are each selected from at least one of a thickener, a tackifier.
9. The building form release agent of claim 1, wherein the cyanoacrylate is methyl 2-cyanoacrylate.
10. A building template, which comprises a substrate, a primer layer and a demolding layer, wherein the primer layer and the demolding layer are sequentially arranged on the surface of the substrate, and the primer layer and the demolding layer are respectively formed by drying the component A and the component B in the building template demolding agent according to any one of claims 1 to 9.
CN201810081184.7A 2018-01-26 2018-01-26 Building template release agent and building template thereof Expired - Fee Related CN110080524B (en)

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CN112538396A (en) * 2020-11-12 2021-03-23 惠州市麒麟环保材料有限公司 Novel water-based aluminum template concrete release agent and preparation method thereof
CN113773898B (en) * 2021-10-19 2022-07-26 绍兴职业技术学院 Environment-friendly styrene butadiene polymer permeable concrete release agent and preparation method thereof

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CN101830032A (en) * 2009-03-10 2010-09-15 刘新智 Concrete long-acting mould release agent and preparation method thereof
CN204773185U (en) * 2015-05-25 2015-11-18 巨化集团技术中心 Rubber gloves adds fluorine mould
CN204940842U (en) * 2015-09-23 2016-01-06 惠州市森信工业有限公司 A kind of building aluminum alloy mould plate with efficient rete
CN105295650A (en) * 2015-11-13 2016-02-03 中国建筑股份有限公司 Concrete template paint and preparation method thereof

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