CN105252678A - High-temperature-resistant wax-system environment-friendly polyurethane release agents and preparation method thereof - Google Patents
High-temperature-resistant wax-system environment-friendly polyurethane release agents and preparation method thereof Download PDFInfo
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Abstract
The invention relates to release agents and a preparation method thereof, in particular to high-temperature-resistant wax-system environment-friendly polyurethane release agents and a preparation method thereof. The release agents comprise 10-25 parts of main release agents, 0-5 parts of auxiliary release agents, 100 parts of deionized water, 5-10 parts of emulsifying agents, 2-5 parts of auxiliary emulsifying agents and 0.5-1.5 parts of stabilizers. A high-speed emulsifying dispersing process under the conditions of 0.2-0.5 MPa, 120-130 DEG C and 5000-20000 r/min is adopted. As polyethylene wax with a relatively high melting point is used in the main release agents, the prepared polyurethane environment-friendly release agents has good high-temperature resistance, and the production cost is far lower than those of silicon-system and fluorine-system release agents. In addition, the obtained environment-friendly polyurethane release agents do not layer or change color within three months, so that the service life of the obtained environment-friendly polyurethane release agents is greatly prolonged. Besides, the deionized water serves as solvents, and is environmentally friendly, free of pollution and low in cost, thereby having broad application value.
Description
Technical field
The present invention relates to a kind of releasing agent and preparation method thereof, particularly relate to a kind of high temperature resistant wax system environment-protecting polyurethane releasing agent and preparation method thereof.
Background technology
Polyurethane is the macromolecular material that the class be made up with active hydrogen ionic reaction of isocyano ion has good physical, and isocyano ion itself is containing polar group, reactivity is large especially, and usually by excessive for isocyano ion in preparation process, therefore it very easily adheres on metal die, causes article removal difficulty.In polyurethane machine-shaping process, usual need add releasing agent, releasing agent can form one deck barrier film between goods and mould, can effectively prevent shaping goods from occurring bonding with mould, thus enable that goods are easier to be deviate from from mould, obtain the polyurethane product that surface is brighter and cleaner.And if it is improper not use releasing agent or releasing agent to select, then can causes article removal difficulty, easily damage goods, and repeatedly clear up mould due to needs production efficiency can be made greatly to reduce.
Releasing agent conventional at present has inner pattern releasing agent applicable and external release agent.
Inner pattern releasing agent applicable is directly added in polyurethane formulations, because its fusing point is lower than urethane cures temperature, and incompatible with cured resin, therefore when polyurethane is heating and curing shaping, inner pattern releasing agent applicable moves to the interface between polyurethane and mould, forms a kind of barrier film, and plays the effect of the demoulding.But; because inner pattern releasing agent applicable is made up of zinc stearate, Stearyl Amine and modified polyorganosiloxane usually; as a part for polyurethane formulations, its active group can have an impact to the physical property of polyurethane, reactivity usually, and therefore inner pattern releasing agent applicable does not have external release agent and applies extensively.
External release agent is a class releasing agent of brushing or spraying on die cavity inner surface before casting resin, the low polar material of its many employing, current external release agent mainly contains three major types: wax system releasing agent, silicon system releasing agent and fluorine system releasing agent, although silicon system releasing agent and the releasing agent demoulding of fluorine system better, but in actual application, it is higher to there is relative price in it, need with a large amount of dimethylbenzene, benzinum, solvent wet goods as solvent during preparation, more serious environmental pollution can be produced, and the shortcoming such as not easy to operate, greatly limit its scope of application.And wax system releasing agent, with low cost due to it, stripping result is good, and is used widely in fields such as pottery, cement, plastics and composites.But in the use procedure of wax system releasing agent, if use organic compound as solvent, although stripping result and compatibility aspect all better, but exceed standard causing the organic volatile in polyurethane product, and environmental pollution problem, and if do not add other techniques and simply use water as solvent, then wax system releasing agent compatibility can be caused bad, the very fast layering of releasing agent, cannot play the effect of the demoulding.And in polyurethane machine-shaping process, usual needs are heat preservation solidification at 80 DEG C-100 DEG C, and most of wax systems releasing agent makes the stripping result of its (>80 DEG C) under the high temperature conditions greatly reduce owing to adopting atoleine or the lower microwax of fusing point, heat resistance is poor, just need again to spray after every 1-2 demoulding, cause production efficiency greatly to decline.Although therefore wax system releasing agent possesses greater advantage in cost, its heat-resisting quantity and the feature of environmental protection should be considered simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of high temperature resistant wax system environment-protecting polyurethane releasing agent and preparation method thereof, the high temperature resistant wax system environment-protecting polyurethane releasing agent that the method is obtained, due to the Tissuemat E adopting fusing point higher in main releasing agent, the polyurethane environmental protection releasing agent be made up of it is made to have excellent heat-resisting quantity, good stripping result can be had under 80-100 DEG C of condition, not stratified in obtained environment-protecting polyurethane releasing agent 3 months, nondiscolouring, substantially prolongs its service life, and take deionized water as solvent, environmental protection, pollution-free, with low cost, there is wide using value.
The object of the invention is to be achieved through the following technical solutions:
A kind of high temperature resistant wax system environment-protecting polyurethane releasing agent, the formula of described releasing agent is made up of following component proportion:
Main releasing agent 10-25 part;
Assisted ejection agent 0-5 part;
Deionized water 100 parts;
Emulsifying agent 5-10 part;
Assistant for emulsifying agent 2-5 part;
Stabilizing agent 0.5-1.5 part.
Described one is high temperature resistant paraffin series environment-protecting polyurethane releasing agent, described main releasing agent is selected from Tissuemat E, molecular weight 1000-5000, fusing point 90-120 DEG C.
Described one is high temperature resistant paraffin series environment-protecting polyurethane releasing agent, described assisted ejection agent is selected from the one in paraffin wax, chlorinated paraffin wax, paraffin oil, No. 70 microwaxes, No. 80 microwaxes.
Described one is high temperature resistant paraffin series environment-protecting polyurethane releasing agent, described emulsifying agent 1 is selected from lauryl sodium sulfate (K12), polyoxyethylene sorbitan monooleate (Tween-80), sorbitan mono-oleic acid ester (SPAN-80), the one in AEO (AEO), glycerin monostearate (monoglyceride), octyl phenyl polyoxyethylene ether (Triton)
Described one is high temperature resistant paraffin series environment-protecting polyurethane releasing agent, described assistant for emulsifying agent 2 is selected from the one of n-butanol, ethylene glycol, ethanol, propane diols, polyglycerol ester.
Described one is high temperature resistant paraffin series environment-protecting polyurethane releasing agent, described stabilizing agent is the one of polyvinyl alcohol or silicone surfactant.
A preparation method for high temperature resistant wax system environment-protecting polyurethane releasing agent, described method specifically comprises the following steps:
(1) first main releasing agent and assisted ejection agent are put into reactor, be warming up to 120-130 DEG C, after it melts, under 3000-5000r/min condition, uniform stirring 5-10 minute; Add stabilizing agent again, under 3000-5000r/min condition, fully stir 10-20 minute, be then cooled to 80-90 DEG C for subsequent use;
(2) in another reactor, add deionized water, temperature is risen to 80-90 DEG C, then slowly add emulsifying agent and assistant for emulsifying agent, under 5000-10000r/min condition, fully stir 10-30 minute, make it fully dissolve transparent shape liquid;
(3) mixture of the main releasing agent prepared in (1) step, assisted ejection agent and stabilizing agent is slowly added in the clear solution obtained by (2) step, then temperature is increased to 120-130 DEG C, pressure increase is to 0.2-0.5MPa, under 5000-20000r/min condition, high-speed stirred 10-30 minute, formed after homogeneous milky white solution until it, cool the temperature to room temperature, high temperature resistant wax system environment-protecting polyurethane releasing agent can be obtained.
A kind of high temperature resistant wax system of the present invention environment-protecting polyurethane releasing agent and preparation method thereof, includes, but are not limited to some other additives, as anticorrisive agent, and defoamer etc.
Advantage of the present invention and effect are:
The high temperature resistant wax system environment-protecting polyurethane releasing agent that the present invention adopts technique scheme obtained, due to the Tissuemat E adopting fusing point higher in main releasing agent, the polyurethane environmental protection releasing agent be made up of it is made to have excellent heat-resisting quantity, good stripping result can be had under 80-100 DEG C of condition, and release times can reach more than 10 times, avoid wax system releasing agent in production urethane curing process easily to lose efficacy, a difficult problem for easy loss, and production cost is far below silicon system and fluorine system releasing agent.
In addition, because the fusing point of Tissuemat E is usually more than 100 DEG C, higher than water boiling point at ambient pressure, therefore will become steam when Tissuemat E melts as the water of solvent at ambient pressure to vapor away, the effect of dispersion cannot be played, so reaction pressure controls at 0.2-0.5MPa by the present invention, make the elevation of boiling point of solvent deionized water, more stable dispersion is defined under the effect of emulsifying agent and assistant for emulsifying agent, not stratified in obtained environment-protecting polyurethane releasing agent 3 months, nondiscolouring, substantially prolongs its service life, and take deionized water as solvent, environmental protection, pollution-free, with low cost, there is wide using value.
Detailed description of the invention
Below in conjunction with specific embodiment, the technological means that the present invention realizes is further elaborated.Should be understood that these embodiments are only for illustration of the present invention, but be not used in and limit the scope of the invention.In following examples, the experimental technique of unreceipted actual conditions, is conventional laboratory conditions.
Example 1: be first that a 3000 Tissuemat E 20g and No. 70 microwax 10g puts into reactor by molecular weight, be warming up to 120 DEG C, after it melts, under 3000r/min condition, uniform stirring 10 minutes.Add polyvinyl alcohol 3g again, keep identical stir speed (S.S.), stir abundant 20 minutes, be then cooled to 80 DEG C for subsequent use, be designated as component 1.
Simultaneously, deionized water 200g is added in another reactor, temperature is risen to 90 DEG C, then sorbitan mono-oleic acid ester (SPAN-80) 20g and n-butanol 5g is slowly added, under 5000r/min condition, abundant stirring 20 minutes, makes it fully dissolve transparent shape liquid, is designated as component 2.
Component 1 is slowly added in the clear solution of component 2, first by pressure increase to 0.2MPa, then temperature is increased to 120 DEG C, under 10000r/min condition, high-speed stirred 30 minutes, is formed after homogeneous milky white solution, by Pressure Drop to 0.1MPa until it, temperature is down to room temperature, can obtain high temperature resistant wax system environment-protecting polyurethane releasing agent.
Example 2: be first that a 5000 Tissuemat E 30g and No. 80 microwax 10g puts into reactor by molecular weight, be warming up to 120 DEG C, after it melts, under 5000r/min condition, uniform stirring 10 minutes.Add polyvinyl alcohol 5g again, keep identical stir speed (S.S.), stir abundant 20 minutes, be then cooled to 90 DEG C for subsequent use, be designated as component 1.
Simultaneously, deionized water 200g is added in another reactor, temperature is risen to 90 DEG C, then polyoxyethylene sorbitan monooleate (Tween-80) 16g and n-butanol 4g is slowly added, under 8000r/min condition, abundant stirring 20 minutes, makes it fully dissolve transparent shape liquid, is designated as component 2.
Component 1 is slowly added in the clear solution of component 2, first by pressure increase to 0.2MPa, then temperature is increased to 110 DEG C and constant temperature, under 15000r/min condition, high-speed stirred 20 minutes, is formed after homogeneous milky white solution, by Pressure Drop to 0.1MPa until it, temperature is down to room temperature, can obtain high temperature resistant wax system environment-protecting polyurethane releasing agent.
Example 3: be first that 5000 Tissuemat E 30g and chlorinated paraffin wax 6g put into reactor by molecular weight, be warming up to 120 DEG C, after it melts, under 5000r/min condition, uniform stirring 5 minutes.Add polyvinyl alcohol 3g again, keep identical stir speed (S.S.), stir abundant 20 minutes, be then cooled to 90 DEG C for subsequent use, be designated as component 1.
Simultaneously, deionized water 200g is added in another reactor, temperature is risen to 80 DEG C, then octyl phenyl polyoxyethylene ether (Triton) 20g and propane diols 4g is slowly added, under 10000r/min condition, abundant stirring 20 minutes, makes it fully dissolve transparent shape liquid, is designated as component 2.
Component 1 is slowly added in the clear solution of component 2, first by pressure increase to 0.3MPa, then temperature is increased to 125 DEG C and constant temperature, under 18000r/min condition, high-speed stirred 20 minutes, is formed after homogeneous milky white solution, by Pressure Drop to 0.1MPa until it, temperature is down to room temperature, can obtain high temperature resistant wax system environment-protecting polyurethane releasing agent.
Scope of the present invention does not limit by concrete embodiment, also comprises method and the component of functional equivalent in the scope of the invention.All amendments of making according to basic composition of the present invention and preparation technology or equivalently to replace, within the scope also falling into described claim.
Claims (7)
1. a high temperature resistant wax system environment-protecting polyurethane releasing agent, is characterized in that, the formula of described releasing agent is made up of following component proportion:
Main releasing agent 10-25 part;
Assisted ejection agent 0-5 part;
Deionized water 100 parts;
Emulsifying agent 5-10 part;
Assistant for emulsifying agent 2-5 part;
Stabilizing agent 0.5-1.5 part.
2. one according to claim 1 high temperature resistant paraffin series environment-protecting polyurethane releasing agent, is characterized in that, described main releasing agent is selected from Tissuemat E, molecular weight 1000-5000, fusing point 90-120 DEG C.
3. one according to claim 1 high temperature resistant paraffin series environment-protecting polyurethane releasing agent, is characterized in that, described assisted ejection agent is selected from the one in paraffin wax, chlorinated paraffin wax, paraffin oil, No. 70 microwaxes, No. 80 microwaxes.
4. one according to claim 1 high temperature resistant paraffin series environment-protecting polyurethane releasing agent, it is characterized in that, described emulsifying agent 1 is selected from lauryl sodium sulfate (K12), polyoxyethylene sorbitan monooleate (Tween-80), sorbitan mono-oleic acid ester (SPAN-80), the one in AEO (AEO), glycerin monostearate (monoglyceride), octyl phenyl polyoxyethylene ether (Triton).
5. one according to claim 1 high temperature resistant paraffin series environment-protecting polyurethane releasing agent, is characterized in that, described assistant for emulsifying agent 2 is selected from the one of n-butanol, ethylene glycol, ethanol, propane diols, polyglycerol ester.
6. one according to claim 1 high temperature resistant paraffin series environment-protecting polyurethane releasing agent, is characterized in that, described stabilizing agent is the one of polyvinyl alcohol or silicone surfactant.
7. a preparation method for high temperature resistant wax system environment-protecting polyurethane releasing agent, it is characterized in that, described method specifically comprises the following steps:
First main releasing agent and assisted ejection agent are put into reactor, be warming up to 120-130 DEG C, after it melts, under 3000-5000r/min condition, uniform stirring 5-10 minute; Add stabilizing agent again, under 3000-5000r/min condition, fully stir 10-20 minute, be then cooled to 80-90 DEG C for subsequent use;
In another reactor, add deionized water, temperature is risen to 80-90 DEG C, then slowly add emulsifying agent and assistant for emulsifying agent, under 5000-10000r/min condition, fully stir 10-30 minute, make it fully dissolve transparent shape liquid;
The mixture of the main releasing agent prepared in (1) step, assisted ejection agent and stabilizing agent is slowly added in the clear solution obtained by (2) step, then temperature is increased to 120-130 DEG C, pressure increase is to 0.2-0.5MPa, under 5000-20000r/min condition, high-speed stirred 10-30 minute, formed after homogeneous milky white solution until it, cool the temperature to room temperature, high temperature resistant wax system environment-protecting polyurethane releasing agent can be obtained.
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| CN106553295A (en) * | 2016-11-01 | 2017-04-05 | 广西大学 | A kind of releasing agent of polyurethane elastomer material |
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| CN109049443A (en) * | 2018-06-14 | 2018-12-21 | 合肥同佑电子科技有限公司 | A kind of polystyrene blow molding release agent |
| CN109881299A (en) * | 2019-03-01 | 2019-06-14 | 杭州鹏图化纤有限公司 | A kind of Wear-proof non-woven fabric and preparation method thereof |
| CN111688080A (en) * | 2020-06-16 | 2020-09-22 | 上海力太化学有限公司 | Full-aqueous release agent for automotive carpet, front wall and sound insulation foamed polyurethane product |
| CN111688078A (en) * | 2020-06-16 | 2020-09-22 | 上海力太化学有限公司 | Water-based release agent for automobile seat polyurethane product |
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| CN109881299A (en) * | 2019-03-01 | 2019-06-14 | 杭州鹏图化纤有限公司 | A kind of Wear-proof non-woven fabric and preparation method thereof |
| CN111688080A (en) * | 2020-06-16 | 2020-09-22 | 上海力太化学有限公司 | Full-aqueous release agent for automotive carpet, front wall and sound insulation foamed polyurethane product |
| CN111688078A (en) * | 2020-06-16 | 2020-09-22 | 上海力太化学有限公司 | Water-based release agent for automobile seat polyurethane product |
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