CN112266621B - Rubber internal mold release agent and preparation method thereof - Google Patents
Rubber internal mold release agent and preparation method thereof Download PDFInfo
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- CN112266621B CN112266621B CN202011238353.7A CN202011238353A CN112266621B CN 112266621 B CN112266621 B CN 112266621B CN 202011238353 A CN202011238353 A CN 202011238353A CN 112266621 B CN112266621 B CN 112266621B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention provides a rubber internal mold release agent and a preparation method thereof, wherein the rubber internal mold release agent is prepared from a matrix component A and a modified component B according to the weight ratio of 1: (0.4-0.6) mass ratio; the base component A comprises 40-65 parts of stearic acid, 10-30 parts of zinc compound, 35-45 parts of stearic amide and 9-15 parts of paraffin; the modifying component B is prepared from the following components in a weight ratio of 1: 1: (0.4-0.6): (0.5-0.7) nano calcium carbonate, a solvent, a modifier and an emulsifier. The base component A and the modified component B in the rubber internal mold release agent have a matching effect, so that the fluidity of a rubber material can be improved, and the lubricating and flowing properties of the rubber material are good; the surface of the prepared rubber product has a self-cleaning effect, so that the rubber product and a mould can be conveniently separated from each other in a demoulding manner, and the surface of the demoulded rubber product is smooth and complete and has good appearance quality.
Description
Technical Field
The invention belongs to the field of rubber additives, and particularly relates to a rubber internal release agent and a preparation method thereof.
Background
The release agent is a functional substance between a mold and a rubber product, and has the functions of preventing the rubber product from being adhered to the mold, causing serious appearance defects of the rubber product and preventing the pollution of a vulcanization mold. The release agent can help the rubber product to be smoothly taken out of the mold, ensure the qualified appearance of the product, reduce the loss of waste products and improve the production efficiency and economic benefit.
The release agent can be divided into two types, one type is an external spraying type and is directly sprayed on a vulcanization mold. Because the powder is used as a carrier, the workshop environment is seriously polluted and the cost is higher; the other is a rubber internal mold release agent which is directly added together with a compounding agent in the rubber material processing process, so that green production is realized, the flowability of the rubber material is improved, the pollution of a mold is reduced, and the mold release is easy.
Patent application publication No. CN104693813A discloses an internal mold release agent of fatty acid zinc soap rubber, which comprises stearic acid, zinc compound, stearic acid amide, paraffin and diethylene glycol ether; although the problem that the mold is easy to demold is solved, slight adhesion is caused in the demolding process, so that the appearance property of the rubber product is influenced. Therefore, the development of a high-quality non-blocking rubber internal mold release agent is of great significance.
Disclosure of Invention
The first purpose of the invention is to provide a rubber internal mold release agent, wherein a matrix component A and a modification component B in the rubber internal mold release agent are cooperated to improve the fluidity of a rubber material, so that the internal lubricating fluidity of the rubber material is good; the surface of the prepared rubber product has a self-cleaning effect, so that the rubber product and a mould can be conveniently separated from each other in a demoulding manner, and the surface of the demoulded rubber product is smooth and complete and has good appearance quality.
In order to solve the technical problems, the invention adopts the technical scheme that: a rubber internal release agent is prepared from a base component A and a modified component B according to the weight ratio of 1: (0.4-0.6) mass ratio;
the base component A comprises 40-65 parts of stearic acid, 10-30 parts of zinc compound, 35-45 parts of stearic amide and 9-15 parts of paraffin;
the modifying component B is prepared from the following components in a weight ratio of 1: 1: (0.4-0.6): (0.5-0.7) nano calcium carbonate, a solvent, a modifier and an emulsifier.
In the technical scheme, the matrix component A and the modification component B are matched for use in the scheme, so that the demolding quality of the rubber product can be improved to a great extent, when the internal demolding agent is counted into the rubber material for use, the problem of poor hot tearing strength of the rubber material can be improved, the hot tearing strength of the whole rubber material is enhanced, and therefore demolding is facilitated in time after molding, and the phenomenon of mold sticking is avoided.
In addition, the existing rubber sizing material has high viscosity so as to easily cause die sticking, most of the existing rubber sizing materials are sprayed with the release agent on the die so as to facilitate the die stripping, but the existing sprayed release agent can accumulate silicon, the die sticking phenomenon can be caused when too much silicon is accumulated, and the die needs to be cleaned after being used, so that the service life is influenced; in the technical scheme, the flowability of the rubber material can be improved by adding the internal rubber release agent, so that the internal lubricating and flowing performance of the rubber material is good; the surface of the prepared rubber product has a self-cleaning effect, so that the rubber product and a mould can be conveniently separated from each other in a demoulding manner, and the surface of the demoulded rubber product is smooth and complete and has good appearance quality.
The stearic acid and the zinc compound in the base component A generate fatty acid zinc, the nano calcium carbonate in the modified component B is modified by the modifier to be combined with the emulsifier to form active nano calcium carbonate, and a certain amount of fatty acid zinc and active nano calcium carbonate are controlled to be combined with paraffin and stearic acid amide as auxiliary materials to change the fluidity of the whole rubber material, so that the fluidity of the rubber material is increased, the surface of the prepared rubber product is smooth and complete, the mold is easy to demould and separate, and the mold sticking phenomenon cannot be caused.
A rubber internal release agent is prepared from a base component A and a modified component B according to the weight ratio of 1: 0.5 of mass ratio;
the base component A comprises 45-60 parts of stearic acid, 10-20 parts of zinc compound, 40 parts of stearic amide and 12 parts of paraffin;
the modifying component B is prepared from the following components in a weight ratio of 1: 1: 0.5: 0.5 of nano calcium carbonate, a solvent, a modifier and an emulsifier.
Further, the stearic acid is one or a mixture of stearic acid 1840, stearic acid 1825 and stearic acid 1810; the zinc compound is one or a mixture of zinc oxide and zinc hydroxide; the paraffin is one or a mixture of microcrystalline paraffin, solid paraffin, chlorinated paraffin and polyethylene wax.
Further, the solvent is ethanol; the emulsifier is one of OP-10, Tween-20, Tween-60, Tween-80, span-20, AEO-3 and Textol 1310; the modifier is stearic acid.
The second purpose of the invention is to provide a preparation method of the internal release agent for rubber, which is used for preparing the internal release agent which is convenient for demoulding a rubber product and a mould, and the internal release agent is directly added into a rubber material for use, so that the prepared rubber product has a smooth surface, is convenient to separate from the mould, cannot pollute the mould, and omits the step of cleaning the mould, thereby facilitating the preparation of the rubber product.
In order to realize the purpose, the adopted technical scheme is as follows: a preparation method of a rubber internal release agent comprises the following steps:
1) preparing a matrix component A: respectively weighing stearic acid, a zinc compound, stearic acid amide and paraffin according to the parts by weight; adding stearic acid into a reaction kettle, heating to melt, and continuously stirring; then adding a zinc compound and continuously stirring; then, sequentially adding stearic acid amide and paraffin wax, and continuously stirring to obtain a clear and transparent matrix component A;
2) preparing a modified component B: adding the modifier into the solvent, and then heating to 60-70 ℃ to completely dissolve the modifier; then adding nano calcium carbonate and an emulsifier, and continuously stirring until uniformly dispersed active nano calcium carbonate emulsion is obtained, wherein the active nano calcium carbonate emulsion is a modified component B;
3) mixing the matrix component A and the modified component B to prepare the rubber internal release agent: slowly adding the modified component B into the matrix component A, and uniformly stirring to obtain the rubber internal release agent.
Further, in the preparation of the base component a in step 1), the temperature was maintained at 120 ℃ after the addition of the zinc compound.
Further, in the step 2) of preparing the modified component B, after adding the nano calcium carbonate and the emulsifier, keeping the temperature at 60-70 ℃.
The invention has the advantages and positive effects that:
the matrix component A and the modification component B are matched to act, so that the hot tearing strength of the rubber material is enhanced, and meanwhile, the fluidity of the rubber material is improved, and the internal lubricating fluidity of the rubber material is good; the prepared rubber product has a smooth surface, so that the rubber product and a mould can be effectively demoulded and separated conveniently, and the separated rubber product has a smooth surface, no adhesion phenomenon and good appearance quality; meanwhile, the surface of the prepared rubber product has a self-cleaning effect, and the demoulded mould is pollution-free and can be continuously used without being cleaned.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
A rubber internal mold release agent is prepared from a base component A and a modified component B according to the weight ratio of 1: (0.4-0.6) mass ratio;
wherein, the matrix component A comprises the following components: 40-65 parts of stearic acid, 10-30 parts of zinc compound, 35-45 parts of stearic acid amide and 9-15 parts of paraffin;
the modifying component B is prepared from the following components in a weight ratio of 1: 1: (0.4-0.6): (0.5-0.7) nano calcium carbonate, a solvent, a modifier and an emulsifier.
The stearic acid is one or a mixture of stearic acid 1840, stearic acid 1825 and stearic acid 1810; the zinc compound is one or a mixture of zinc oxide and zinc hydroxide; the paraffin is one or a mixture of microcrystalline paraffin, solid paraffin, chlorinated paraffin and polyethylene wax.
The solvent is ethanol; the emulsifier is one of OP-10, Tween-20, Tween-60, Tween-80, span-20, AEO-3 and Textol 1310; the modifier is stearic acid.
A preparation method of a rubber internal release agent comprises the following steps:
1) preparing a matrix component A: respectively weighing stearic acid, a zinc compound, stearic acid amide and paraffin according to the parts by weight; adding stearic acid into a reaction kettle, heating to melt, and continuously stirring; then adding a zinc compound and continuously stirring; then, sequentially adding stearic acid amide and paraffin wax, and continuously stirring to obtain a clear and transparent matrix component A;
2) preparing a modified component B: adding the modifier into the solvent, and then heating to 60-70 ℃ to completely dissolve the modifier; then adding nano calcium carbonate and an emulsifier, and continuously stirring until uniformly dispersed active nano calcium carbonate emulsion is obtained, wherein the active nano calcium carbonate emulsion is a modified component B;
3) mixing the matrix component A and the modified component B to prepare the rubber internal release agent: slowly adding the modified component B into the matrix component A, and uniformly stirring to obtain the rubber internal release agent.
Wherein, in the step 1) of preparing the matrix component A, the temperature is kept at 120 ℃ after the zinc compound is added; in the step 2) of preparing the modified component B, the nano calcium carbonate and the emulsifier are added, and then the temperature is kept between 60 and 70 ℃.
Examples 1 to 10 and comparative examples 1 to 6 are all rubber internal mold release agents prepared using the above-described preparation method, comparative example 5 is a simple base component a, and comparative example is a simple modifying component B, wherein the contents of the respective components are shown in table 1:
wherein, in examples 1 to 3 and comparative examples 1 to 6, stearic acid is stearic acid 1840, zinc compound is zinc oxide, paraffin wax is polyethylene wax, solvent is 75% ethanol, emulsifier is tween-20, modifier is stearic acid 1840;
in example 4, stearic acid is 1825, zinc compound is zinc hydroxide, paraffin is chlorinated paraffin, solvent is 75% ethanol, emulsifier is AEO-3, modifier is 1825;
in example 5, stearic acid is 1810, zinc compound is zinc oxide, paraffin is microcrystalline paraffin, solvent is 75% ethanol, emulsifier is span-20, modifier is 1810;
in examples 6 to 10, stearic acid was 1840, zinc compound was zinc hydroxide, paraffin wax was polyethylene wax, solvent was 75% ethanol, emulsifier was OP-10, and modifier was 1810.
TABLE 1 component contents of examples and comparative examples
The rubber internal mold release agents obtained in examples 2 to 10 and comparative examples 1 to 6 were added to a rubber compound for use in amounts of the rubber internal mold release agents: the rubber material is 1: 100; the results of observing the mold release effect and the appearance of the mold of the rubber product are shown in Table 2:
TABLE 2 statistical tables of stripping effectiveness of examples and comparative examples
From the results of the phenomenon shown in table 2, it can be seen that the rubber internal mold release agent of the present invention has a good mold release effect by comparing the use phenomena of examples 1 to 10, and can ensure that a rubber product is rapidly separated from a mold when used, and the phenomena of adhesion and mold contamination are not generated, thereby facilitating mass production and use;
as can be seen from comparative example 1 and comparative examples 1 to 4, only by controlling the content of each component within the range defined by the present invention, the overall mold release effect is the best, and the content of the component less than or exceeding the range affects the final mold release effect of the internal mold release agent, which is likely to cause appearance defects of rubber products and mold contamination, and is difficult to clean;
as can be seen from comparative example 1 and comparative examples 5 and 6, the use of the base component A or the modified component B alone does not allow the rubber product to be completely separated from the mold. Therefore, only by matching the base component A and the modified component B, the rubber product can be completely separated from the mold, the mold pollution can not be caused, and the intact appearance performance of the rubber product can be ensured.
Experimental example:
the rubber internal mold release agents obtained in examples 1 to 10 and comparative examples 1 to 6 were used by adding them to a rubber compound in the amounts of the rubber internal mold release agents: the rubber material is 1: 100; preparing a rubber adhesive tape, and performing a tearing strength experiment on the adhesive tape according to GB/T12829-2006 so as to judge the hot tearing strength performance of the adhesive tape; the detection results are shown in table 3: wherein comparative example 7 is a rubber article normally used in the prior art;
TABLE 3 statistical tables of releasing effects of examples and comparative examples
As can be seen from the experimental data in Table 3, the internal rubber mold release agent disclosed by the invention can be used in a rubber material to effectively improve the tearing strength of the rubber material, so that the hot tearing strength performance of the rubber material is enhanced, and the rubber material is easier to form.
Although the embodiments of the present invention have been described in detail, the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A rubber internal mold release agent is characterized in that: the rubber internal mold release agent is prepared from a matrix component A and a modified component B according to the proportion of 1: (0.4-0.6) mass ratio;
the base component A comprises 40-65 parts of stearic acid, 10-30 parts of zinc compound, 35-45 parts of stearic amide and 9-15 parts of paraffin;
the modifying component B is prepared from the following components in a weight ratio of 1: 1: (0.4-0.6): (0.5-0.7) preparing nano calcium carbonate, a solvent, a modifier and an emulsifier;
the rubber internal mold release agent is prepared by the following steps:
1) preparing a matrix component A: respectively weighing stearic acid, a zinc compound, stearic acid amide and paraffin according to the parts by weight; adding stearic acid into a reaction kettle, heating to melt, and continuously stirring; then adding a zinc compound and continuously stirring; then, sequentially adding stearic acid amide and paraffin wax, and continuously stirring to obtain a clear and transparent matrix component A;
2) preparing a modified component B: adding the modifier into the solvent, and then heating to 60-70 ℃ to completely dissolve the modifier; then adding nano calcium carbonate and an emulsifier, and continuously stirring until uniformly dispersed active nano calcium carbonate emulsion is obtained, wherein the active nano calcium carbonate emulsion is a modified component B;
3) mixing the matrix component A and the modified component B to prepare the rubber internal release agent: slowly adding the modified component B into the matrix component A, and uniformly stirring to obtain the rubber internal release agent.
2. A rubber internal mold release agent according to claim 1, characterized in that: the rubber internal mold release agent is prepared from a matrix component A and a modified component B according to the proportion of 1: 0.5 of mass ratio;
the base component A comprises 45-60 parts of stearic acid, 10-20 parts of zinc compound, 40 parts of stearic amide and 12 parts of paraffin;
the modifying component B is prepared from the following components in a weight ratio of 1: 1: 0.5: 0.5 nanometer calcium carbonate, solvent, modifier and emulsifier.
3. A rubber internal mold release agent according to claim 1 or 2, characterized in that: the stearic acid is one or a mixture of stearic acid 1840, stearic acid 1825 and stearic acid 1810; the zinc compound is one or a mixture of zinc oxide and zinc hydroxide; the paraffin is one or a mixture of microcrystalline paraffin, solid paraffin, chlorinated paraffin and polyethylene wax.
4. A rubber internal mold release agent according to claim 1 or 2, characterized in that: the solvent is ethanol; the emulsifier is one of OP-10, Tween-20, Tween-60, Tween-80, span-20, AEO-3 and Textol 1310; the modifier is stearic acid.
5. A preparation method of a rubber internal release agent is characterized by comprising the following steps: the method comprises the following steps:
1) preparing a matrix component A: respectively weighing stearic acid, a zinc compound, stearic acid amide and paraffin according to the parts by weight; adding stearic acid into a reaction kettle, heating to melt, and continuously stirring; then adding a zinc compound and continuously stirring; then, sequentially adding stearic acid amide and paraffin wax, and continuously stirring to obtain a clear and transparent matrix component A;
2) preparing a modified component B: adding the modifier into the solvent, and then heating to 60-70 ℃ to completely dissolve the modifier; then adding nano calcium carbonate and an emulsifier, and continuously stirring until uniformly dispersed active nano calcium carbonate emulsion is obtained, wherein the active nano calcium carbonate emulsion is a modified component B;
3) mixing the matrix component A and the modified component B to prepare the rubber internal release agent: slowly adding the modified component B into the matrix component A, and uniformly stirring to obtain the rubber internal release agent.
6. The process for producing an internal rubber mold release agent according to claim 5, characterized in that: in the preparation of the base component A in step 1), the temperature is maintained at 120 ℃ after the addition of the zinc compound.
7. The process for producing an internal rubber mold release agent according to claim 5, characterized in that: step 2) in the preparation of the modified component B, adding nano calcium carbonate and an emulsifier, and keeping the temperature at 60-70 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB820706A (en) * | 1957-04-17 | 1959-09-23 | Technical Proc Inc | Mould releasing agent |
| CN104693813A (en) * | 2015-04-03 | 2015-06-10 | 浙江巍翔科技集团有限公司 | Aliphatic acid zinc soap rubberlike internal releasing agent |
| CN109576043A (en) * | 2018-12-06 | 2019-04-05 | 河南省科学院高新技术研究中心 | A kind of concrete product separating releasing agent and preparation method thereof |
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2020
- 2020-11-09 CN CN202011238353.7A patent/CN112266621B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB820706A (en) * | 1957-04-17 | 1959-09-23 | Technical Proc Inc | Mould releasing agent |
| CN104693813A (en) * | 2015-04-03 | 2015-06-10 | 浙江巍翔科技集团有限公司 | Aliphatic acid zinc soap rubberlike internal releasing agent |
| CN109576043A (en) * | 2018-12-06 | 2019-04-05 | 河南省科学院高新技术研究中心 | A kind of concrete product separating releasing agent and preparation method thereof |
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Denomination of invention: A rubber internal release agent and its preparation method Effective date of registration: 20221124 Granted publication date: 20220701 Pledgee: Hangzhou United Rural Commercial Bank Co.,Ltd. Zhuantang Sub branch Pledgor: ZHEJIANG WEIXIANG TECHNOLOGY GROUP Co.,Ltd. Registration number: Y2022980023373 |