CN108394048B - Preparation method of water-based release agent for PU foamed high-resilience product molding and corresponding water-based release agent - Google Patents
Preparation method of water-based release agent for PU foamed high-resilience product molding and corresponding water-based release agent Download PDFInfo
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- CN108394048B CN108394048B CN201810126301.7A CN201810126301A CN108394048B CN 108394048 B CN108394048 B CN 108394048B CN 201810126301 A CN201810126301 A CN 201810126301A CN 108394048 B CN108394048 B CN 108394048B
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- release agent
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- fatty acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/60—Releasing, lubricating or separating agents
- B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/04—Anhydrides, e.g. cyclic anhydrides
- C08F222/06—Maleic anhydride
- C08F222/08—Maleic anhydride with vinyl aromatic monomers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1818—C13or longer chain (meth)acrylate, e.g. stearyl (meth)acrylate
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention provides a preparation method of an aqueous release agent for forming a PU foamed high-resilience product, which comprises the following steps: step S1: copolymerizing acrylate, styrene and maleic anhydride to obtain a mixed copolymer; step S2: mixing the mixed copolymer with fatty acid ester, and adding an emulsifier; step S3: adding potassium hydroxide aqueous solution to obtain the aqueous release agent for forming the PU foaming high-resilience product. The invention also provides the aqueous release agent for forming the PU foaming high-resilience product, which is prepared by the preparation method. The invention can realize quick demoulding and has better demoulding effect; the product surface is smooth, and the mold surface has less residual mold release agent.
Description
Technical Field
The invention relates to a preparation method of a water-based release agent for forming a PU foamed high-resilience product and a corresponding water-based release agent.
Background
In modern industrial production, the application of the release agent is very wide, and the release agent can separate a product from a mold and reduce the loss of the product.
In the prior art, chinese patent 201510038619.6 discloses a mold release agent, which comprises the following raw materials in parts by mass: 20-30 parts of dimethyl siloxane, 2-3 parts of talcum powder, 3-5 parts of castor oil, 3-5 parts of paraffin, 15-20 parts of low-pressure polyethylene, 3-5 parts of a silane coupling agent and 5-10 parts of distilled water.
Chinese patent 201080040841.5 discloses a mold release agent comprising an effective amount of a polyfluoroalkylphosphonic acid or a salt thereof represented by the general formula CnF2n +1(CH2CF2) a (CF2CF2) b (CH2CH2) cP (O) (OH)2 (n: an integer of 1 to 6, a: an integer of 1 to 4, b: an integer of 1 to 3, c: an integer of 1 to 3) and a polyfluoroalkylphosphonic acid or a salt thereof represented by the general formula CnF2n +1(CH2CF2) a (CF2CF2) b (CH2CH2) cP (O) (RO) mR '] d (OH) 2-d (RO: a linear or branched oxyalkylene group having 2 to 6 carbon atoms, R': a hydrogen atom or an alkyl or aralkyl group having 1 to 20 carbon atoms, n: an integer of 1 to 6, a: an integer of 1 to 4, b: an integer of 1 to 3, c: an integer of 1 to 3, d: an integer of 1 to 2, m: an integer of 1 to 100).
Chinese patent application 201580025095.5 discloses a mold release composition comprising a minimum of three reactive moieties per molecule to provide both mold adhesion and crosslink density. The composition is soluble in VOC-free organic solvents or water either alone or with the aid of emulsifiers.
Chinese patent application 201410138593.8 discloses a mold release agent which is copolymerized from at least a fluorine-containing monomer, an acrylate monomer and an acid group monomer.
The disadvantages of the above-mentioned method are: the demoulding effect is not good, and the surface of the product is rough.
Therefore, how to provide a release agent with good release effect and smooth product surface is a problem to be solved in the industry.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method of the water-based release agent for forming the PU foaming high-resilience product, and the water-based release agent for forming the PU foaming high-resilience product prepared by the preparation method has better release effect and smooth surface.
In order to realize the aim, the invention provides a preparation method of an aqueous release agent for forming a PU foamed high-resilience product, which comprises the following steps:
step S1: copolymerizing acrylate, styrene and maleic anhydride to obtain a mixed copolymer;
step S2: mixing the mixed copolymer with fatty acid ester, and adding an emulsifier;
step S3: adding potassium hydroxide aqueous solution to obtain the aqueous release agent for forming the PU foaming high-resilience product.
In the invention, the aqueous release agent for forming the PU foaming high-resilience product is emulsion.
In the present invention, PU is polyurethane.
The invention can realize quick demoulding and has better demoulding effect; the product surface is smooth, and the mold surface has less residual mold release agent.
According to another embodiment of the present invention, in step S1, the acrylate is prepared by esterification of acrylic acid and a monohydric alcohol; the carbon number of the monohydric alcohol is 6-30.
According to another embodiment of the present invention, in step S2, the mass ratio of the mixed copolymer to the fatty acid ester is 1: 0.1-0.3.
according to another embodiment of the present invention, the fatty acid ester is prepared by esterification of a fatty acid and pentaerythritol; the fatty acid has 18-22 carbon atoms.
According to another embodiment of the present invention, in step S3, the mass fraction of potassium hydroxide in the aqueous solution of potassium hydroxide is 0.5%.
The invention also provides a water-based release agent for forming the PU foaming high-resilience product, which is prepared by the preparation method; when in use, different special solvents can be further added according to the requirements to realize different functions.
For the purpose of quick drying after demolding, a water repellent agent (such as fluoroether) can be selected as a special solvent.
In order to ensure that the residual quantity of the release agent on the surface of the mold is less, short-chain isomeric alcohol (with a branched chain structure) or short-chain ether can be selected as a special solvent; wherein the carbon atoms of the short-chain isomeric alcohol and the short-chain ether are both 3-8; after the addition, the special solvent and the aqueous release agent for forming the PU foaming high-resilience product form a low-temperature azeotropic mixture with a boiling point of 60-80 ℃; all components in the low-temperature azeotropic mixture volatilize together, and the residual quantity is very small.
Compared with the prior art, the invention has the following beneficial effects:
the invention can realize quick demoulding and has better demoulding effect; the product surface is smooth, and the mold surface has less residual mold release agent.
Detailed Description
Example 1
The embodiment provides a preparation method of an aqueous release agent for forming a PU foamed high-resilience product, which comprises the following steps:
step S1: and (3) copolymerizing the acrylate, the styrene and the maleic anhydride to obtain the mixed copolymer.
The acrylic ester is prepared by esterifying acrylic acid and monohydric alcohol; the monohydric alcohol has 15 carbon atoms.
Step S2: the mixed copolymer is mixed with the fatty acid ester and the emulsifier is added.
The mass ratio of the mixed copolymer to the fatty acid ester is 1: 0.1.
the fatty acid ester is prepared by esterifying fatty acid and pentaerythritol; the fatty acid has a carbon number of 20.
Step S3: adding potassium hydroxide aqueous solution to obtain the aqueous release agent for forming the PU foaming high-resilience product.
The aqueous release agent for forming the PU foaming high-resilience product is emulsion; in the potassium hydroxide aqueous solution, the mass fraction of potassium hydroxide is 0.5%.
The embodiment also provides the aqueous release agent for forming the PU foaming high-resilience product, which is prepared by the preparation method; when in use, different special solvents can be further added according to the requirements to realize different functions.
In order to ensure that the residual quantity of the release agent on the surface of the mold is less, short-chain isomeric alcohol with a branched chain structure is selected as a special solvent; the number of carbon atoms of the short-chain isomeric alcohol is 5; after the addition, the special solvent and the aqueous release agent for forming the PU foaming high-resilience product form a low-temperature azeotropic mixture with a boiling point of 70 ℃.
Example 2
This example differs from example 1 in that: the special solvent is short chain ether with 6 carbon atoms.
Example 3
This example differs from example 1 in that: in order to realize the purpose of quick drying after demoulding, fluoroether is selected as a special solvent.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (4)
1. A preparation method of an aqueous release agent for forming a PU foamed high-resilience product comprises the following steps:
step S1: copolymerizing acrylic ester, styrene and maleic anhydride to obtain a mixed copolymer, wherein the acrylic ester is prepared by esterifying acrylic acid and monohydric alcohol; the carbon atom number of the monohydric alcohol is 6-30;
step S2: mixing the mixed copolymer with fatty acid ester according to a mass ratio of 1: 0.1-0.3, and adding an emulsifier;
step S3: adding potassium hydroxide aqueous solution to obtain the aqueous release agent for forming the PU foaming high-resilience product.
2. The method according to claim 1, wherein the fatty acid ester is prepared by esterifying a fatty acid with pentaerythritol; the number of carbon atoms of the fatty acid is 18-22.
3. The method according to claim 1, wherein in the step S3, the mass fraction of potassium hydroxide in the aqueous solution of potassium hydroxide is 0.5%.
4. An aqueous release agent for forming PU foamed high resilience articles prepared by the preparation method as claimed in any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810126301.7A CN108394048B (en) | 2018-02-07 | 2018-02-07 | Preparation method of water-based release agent for PU foamed high-resilience product molding and corresponding water-based release agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810126301.7A CN108394048B (en) | 2018-02-07 | 2018-02-07 | Preparation method of water-based release agent for PU foamed high-resilience product molding and corresponding water-based release agent |
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| Publication Number | Publication Date |
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| CN108394048A CN108394048A (en) | 2018-08-14 |
| CN108394048B true CN108394048B (en) | 2021-07-13 |
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| CN201810126301.7A Active CN108394048B (en) | 2018-02-07 | 2018-02-07 | Preparation method of water-based release agent for PU foamed high-resilience product molding and corresponding water-based release agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114854477B (en) * | 2022-04-27 | 2023-08-08 | 重庆渝江压铸有限公司 | Silicon-free release agent with excellent release performance and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104890163A (en) * | 2015-06-08 | 2015-09-09 | 梁胜光 | Demoulding addition agent |
| CN105855457B (en) * | 2016-05-06 | 2019-07-16 | 广州采润新材料有限公司 | Plate casting mould release and preparation method thereof in a kind of mobile phone magnesium alloy |
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Address after: 510000 Room 202, 560 Changgengxi Street, Jitang, Huangpu District, Guangzhou City, Guangdong Province Applicant after: Guangzhou Zairun New Materials Co., Ltd. Address before: 510000 Room 202, 560 Changgengxi Street, Jitang, Huangpu District, Guangzhou City, Guangdong Province Applicant before: Guangzhou Cairun Chemical Co., Ltd. |
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