WO2005080486A1 - 水を発泡剤としたポリオレフィン系予備発泡粒子の製造方法 - Google Patents
水を発泡剤としたポリオレフィン系予備発泡粒子の製造方法 Download PDFInfo
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- WO2005080486A1 WO2005080486A1 PCT/JP2005/001567 JP2005001567W WO2005080486A1 WO 2005080486 A1 WO2005080486 A1 WO 2005080486A1 JP 2005001567 W JP2005001567 W JP 2005001567W WO 2005080486 A1 WO2005080486 A1 WO 2005080486A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/125—Water, e.g. hydrated salts
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
- C08J9/18—Making expandable particles by impregnating polymer particles with the blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/06—CO2, N2 or noble gases
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
Definitions
- the present invention relates to a method for producing polyolefin-based pre-expanded particles which can be suitably used for producing an in-mold foam molded article of a polyolefin resin used for a buffer packaging material, a mail box, a heat insulating material, a core material of an automobile bumper, and the like.
- polyolefin resin particles are dispersed together with a foaming agent in an aqueous dispersion medium, the temperature is raised, the foaming agent is impregnated into the polyolefin resin particles at a constant pressure and a constant temperature, and then released under a low-pressure atmosphere for preliminary use.
- Methods for obtaining expanded particles are known.
- the blowing agent include a method using a volatile organic blowing agent such as propane and a small amount of tongue (JP-A-52-717174), a method using an inorganic gas such as carbon dioxide, nitrogen, and air ( Japanese Patent Publication No. 60-224650) is disclosed.
- volatile organic blowing agents such as propane and butane are expensive and costly.
- the volatile organic foaming agent has the effect of plasticizing polyolefin-based resin particles, and it is easy to obtain a high expansion ratio.On the other hand, due to the plasticizing action, the expansion ratio of the polyolefin-based pre-expanded particles is in the crystalline state. It has the drawback that it is difficult to control
- the impregnating tank for impregnating the polyolefin-based resin particles with the foaming agent needs to have a high pressure resistance, and has a disadvantage that the equipment cost is high.
- Polyolefin resin containing hydrophilic polymer and inorganic filler in closed container A method has been proposed in which particles are dispersed in water and heated to a temperature equal to or higher than the softening temperature of the resin particles to obtain water-containing polyolefin-based resin particles, and then the dispersion is discharged to a low pressure region to produce polyolefin-based pre-expanded particles.
- Japanese Patent Application Laid-Open No. 11-106756 Japanese Patent Application Laid-Open No. 11-106756
- polyolefin-based pre-expanded particles can be obtained at a lower pressure in the container than when an inorganic gas such as carbon dioxide, nitrogen, or air is used as a blowing agent.
- an inorganic gas such as carbon dioxide, nitrogen, or air is used as a blowing agent.
- the expansion ratio does not meet the required level, and the poor mixing of the hydrophilic polymer and the polyolefin resin results in uneven coloration of the expanded particles and worsening
- the present invention relates to a method for producing polyolefin-based pre-expanded particles using water impregnated in polyolefin-based resin particles as an effective foaming agent. 5 001567
- the purpose of the present invention is to provide an economical preliminary foam particle. Still another object of the present invention is to provide polyolefin-based pre-expanded particles having a small magnification variation.
- a polyalkylene-based resin particle containing a hydroxyalkylethanolamine and a compound having a triazine skeleton and a molecular weight per unit triazine skeleton of 300 or less is used as a base resin.
- the polyolefin resin particles water can be efficiently contained in the polyolefin-based resin particles, and it has been found that the above problems can be solved.
- the present invention has been completed.
- the first aspect of the present invention is to seal polyolefin resin particles containing a hydroxyalkylethanolamine and a compound having a triazine skeleton and a molecular weight per unit triazine skeleton of 300 or less with respect to the polyolefin resin.
- water used as a dispersion medium is used as a foaming agent and an atmosphere at a lower pressure than the internal pressure.
- the present invention relates to a method for producing polyolefin-based pre-expanded particles, characterized in that the particles are discharged into and foamed.
- the dispersant is 0.2 to 1 part by weight based on 100 parts by weight of the polyolefin resin particles.
- the present invention relates to the above-mentioned method for producing polyolefin-based pre-expanded particles, which comprises not less than 0.03 parts by weight and not more than 0.15 parts by weight of a dispersing aid.
- the low-pressure atmosphere when releasing the polyolefin-based pre-expanded particles from the closed vessel into an atmosphere at a pressure lower than the internal pressure is a gas of 60 ° C. or higher
- the present invention relates to the method for producing polyolefin-based pre-expanded particles as described above, wherein the particles are made to collide with a collision plate or a vessel wall at a collision angle of 5 to 90 degrees.
- pre-expanded particles having a high expansion ratio can be produced. Furthermore, there is little variation in magnification. Polyolefin-based pre-expanded particles can be produced.
- polyolefin-based pre-expanded particles are used for packing, heat insulating material, core material of automobile pumps, and especially for cushioning and packaging materials for electrical appliances that require antistatic performance. Used in the manufacture of
- the polyolefin-based resin used in the present invention is a resin containing 50% by weight or more, preferably 80% by weight or more, more preferably 90% by weight or more of olefin units.
- Polyethylenes such as polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (L-LDPE), low-molecular-weight polyethylene, propylene homopolymer, and polyolefin Examples include polypropylenes such as random copolymers, ⁇ -olefin-propylene block copolymers, and other polyolefin homopolymers such as polybutene. These may be used alone or in combination of two or more. In particular, an ethylene-propylene random copolymer, an ethylene-propylene-1-butene random copolymer, and a propylene-11-butene random copolymer exhibit favorable foaming properties and can be suitably used.
- the polyolefin resin is excellent in foamability and moldability.
- the melting point of the polyolefin is 110 ° C. or higher and 1 ⁇ 5. C or lower, more preferably 115 ° C or higher and 160 ° C or lower.
- the melt index (hereinafter, MI value) of the polyolefin resin is preferably from 0.5 g / 10 min to 30 g / 10 min, more preferably from 0.5 g / 10 min to 15 g / 10 min. Minutes.
- MI value melt index
- the melting point refers to a temperature of the polyolefin-based resin 1 to 10 111 ⁇ raised from 40 to 220 ° C. at a rate of 10 ° C./min by a differential scanning calorimeter, and then to 40 ° C. JP2005 / 001567
- the Ml value is a value measured at a temperature of 230 ° C and a load of 2.16 Kg according to JIS K7210.
- the hydroxyalkylethanolamine used in the present invention is a special cationic surfactant, and is a substance represented by the following composition formula.
- R represents an alkyl group, and the alkyl group preferably has 10 to 20 carbon atoms.
- This hydroxyalkylethanolamine has the effect of increasing the water content of the polyolefin resin particles and providing polyolefin preexpanded particles having a high expansion ratio.
- the amount used is not particularly limited, but usually, the upper limit of the amount of the hydroxyalkylethanolamine used is preferably 5 parts by weight, more preferably 3 parts by weight, per 100 parts by weight of the polyolefin resin.
- the lower limit of the amount of the hydroxyalkylethanolamine used is preferably 0.01 part by weight, more preferably 0.5 part by weight. Addition of hydroxyalkylethanolamine in an amount of 0.01 part by weight or more and 5 parts by weight or less does not significantly increase the production cost, and the polyolefin resin particles have a sufficient water-containing effect. Polyolefin-based pre-expanded particles can be produced.
- a compound having a triazine skeleton and having a molecular weight per unit triazine skeleton of 300 or less (hereinafter, sometimes referred to as a “triazine compound”) is used.
- the molecular weight per unit triazine skeleton refers to the triazine contained in one molecule. Is the value obtained by dividing the molecular weight by the number of skeletons.
- the triazine compound increases the water content of the polyolefin-based resin particles, gives polyolefin-based pre-expanded particles having a high expansion ratio, and has an effect of suppressing the expansion ratio and the cell diameter.
- the molecular weight per unit triazine skeleton exceeds 300, the effect of increasing the water content, the effect of reducing the expansion ratio, and the effect of suppressing the cell diameter variation are not sufficiently exhibited.
- the hydroxyalkylethanolamine used in the present invention and the compound having a triazine skeleton and a molecular weight per unit triazine skeleton of 300 or less have a water-containing effect, and can increase the expansion ratio of the polyolefin-based pre-expanded particles.
- a compound having hydroxyalkylethanolamine and a triazine skeleton and a molecular weight per unit triazine skeleton of 300 or less to the polyolefin resin in combination, the water-containing effects of both can be added.
- the water-containing effect described above is observed, and polyolefin-based pre-expanded particles having a high expansion ratio higher than the sum of both effects can be produced.
- Examples of the compound having a triazine skeleton and having a molecular weight per unit triazine skeleton of 300 or less used in the present invention include, for example, melamine (chemical name: 1,3,5-triazine-2,4,6-triamine) , Ammeline (chemical name: 1,3,5-triazine-2-hydroxy-1,4,6-diamine), ammelide (chemical name: 1,3,5-triazine-1,2,4-hydroxy-6-amine) ), Cyanuric acid (Chemical name: 1,3,5-triazine-1,2,4,6-triol), Isocyanuric acid (Chemical name: 1,3,5-Triadine-2,4,6 (1H, 3 H, 5H) -trione), acetoguanamine (chemical name: 1,3,5-triazine-2,4-diammine-6-methyl), benzoguanamine (chemical name: 1,3,5-triazine-2,4-diamine-6) —Phenyl), tri
- melamine, isocyanuric acid, and melamine * isocyanuric acid condensate can be suitably used because they have a high effect of increasing the water content, a high foaming ratio variation, and a high effect of suppressing cell diameter variation.
- a compound having a triazine skeleton and having a molecular weight of 300 or less per unit triazine skeleton may be referred to as a triazine compound.
- these triazine conjugates usually have an average particle diameter of 0.1 to 800 / xm, preferably 1 to 100 ⁇ . The more uniform the particle diameter, the better.
- metal soaps such as magnesium stearate, barium stearate and calcium stearate may be used in an amount of 0.1 to 1% by weight.
- these triazine compounds are present as solid particles at a processing temperature when forming a polyolefin-based resin composition. If it has a point, it preferably has a melting point of 180 ° C or more. In the case of decomposing without having a melting point, those having a decomposition temperature of 230 ° C or more are preferable.
- the amount of the triazine compound used is not particularly limited, but usually the upper limit is preferably 8 parts by weight, more preferably 5 parts by weight, based on 100 parts by weight of the polyolefin resin.
- the lower limit of the amount used is preferably 0.05 part by weight, more preferably 0.08 part by weight, based on 100 parts by weight of the polyolefin resin.
- the effect of increasing the water content, the effect of suppressing the expansion of the expansion ratio, and the effect of suppressing the diameter of the cell are further enhanced, and the cell diameter of the polyolefin-based pre-expanded particles is further improved. It is hard to be miniaturized and breaks bubbles, and can exhibit better moldability.
- the polyolefin-based resin particles used in the present invention preferably contain an inorganic filler from the viewpoint that polyolefin-based pre-expanded particles having uniform cells and a high expansion ratio can be obtained.
- the inorganic filler II include Tanolek and calcium carbonate.
- the use of talc is preferred in that the dispersion of magnification is small, the cells are uniform, and polyolefin-based pre-expanded particles having a relatively high expansion ratio are obtained.
- the average particle size of the inorganic filler is not particularly limited, but it is possible to obtain polyolefin-based pre-expanded particles having uniform cells, and to obtain mechanical strength and flexibility from the polyolefin-based pre-expanded particles. Because of the ability to obtain excellent molded products, 2005/001567
- the upper limit of the average particle size of the direct agent is preferably 50 ⁇ m, and more preferably 10 ⁇ m.
- the lower limit of the average particle diameter of the inorganic filler is preferably 0.5, and more preferably 0.5 m.
- the amount used when the inorganic filler is used is not particularly limited, but from the viewpoint of obtaining polyolefin-based pre-expanded particles having a relatively high foaming ratio, polyolefin-based resin
- the amount is preferably 0.01% by weight or more with respect to 100 parts by weight.
- the content is preferably 5 parts by weight or less, more preferably 5 parts by weight or less.
- the polyolefin-based resin particles of the present invention are usually melted using an extruder, an eder, a Banbury mixer (trademark), a roll, or the like to obtain desired particles such as a cylinder, an elliptic cylinder, a sphere, a cube, a cuboid, or the like.
- the weight of one particle is preferably 0.2 mg or more and 10 mg or less, more preferably 0.5 mg or more and 6 mg or less.
- a compound having a hydroxyalkylethanolamine and a triazine skeleton and a molecular weight per unit triazine skeleton of 300 or less is added, and if necessary, an inorganic filler is further added.
- Polyolefin resin particles can be obtained by adding additives such as a coloring agent, an antistatic agent, a flame retardant, an antioxidant, and a weathering agent.
- the polyolefin-based pre-expanded particles in the present invention are obtained by dispersing the polyolefin-based resin particles in an aqueous dispersion medium in a closed container, heating the polyolefin-based resin particles to a temperature equal to or higher than the softening temperature of the polyolefin-based resin particles, and reducing the internal pressure in the closed container. It is manufactured by a method in which the pressure is increased by air or nitrogen and then released into an atmosphere at a pressure lower than the internal pressure and foamed.
- the foaming ratio spreads more.
- the closed container used is not particularly limited, and any container can be used as long as it can withstand the pressure in the container and the temperature in the container during the production of the pre-expanded particles.
- an autoclave-type pressure-resistant container can be used.
- the aqueous dispersion medium in which the polyolefin-based resin particles are dispersed may be any solvent that does not dissolve the polyolefin-based resin particles.
- water is preferable in terms of environment and economy, and the amount of the aqueous dispersion medium used is In order to improve the dispersibility of the resin particles in water, it is usually preferred that the amount be 100 to 500 parts by weight based on 100 parts by weight of the polyolefin resin particles.
- Examples of the dispersant include poorly water-soluble inorganic compounds such as basic calcium triphosphate, basic magnesium carbonate, and calcium carbonate. Among them, basic calcium triphosphate is preferable for obtaining good dispersibility.
- Examples of the dispersing aid include anionic surfactants such as sodium dodecylbenzenesulfonate, sodium n-paraffinsulfonate and sodium olefin sulfonate. Among them, sodium n-paraffinsulfonate is preferred. It is preferable for obtaining dispersibility.
- the amount of the dispersant used is preferably at least 0.2 parts by weight based on 100 parts by weight of the polyolefin resin particles in order to improve the dispersibility of the resin particles in an aqueous dispersion medium. It is preferably not more than 0.3 parts by weight, more preferably not less than 0.3 parts by weight and not more than 0.7 parts by weight.
- the amount of the dispersion aid used is preferably from 0.03 to 0.15 parts by weight in order to improve the dispersibility of the resin particles in the aqueous dispersion medium. It is more preferable that the amount is 0.05 to 0.12 parts by weight.
- the temperature is increased with stirring to a constant temperature equal to or higher than the softening temperature of the polyolefin-based resin particles.
- the internal pressure in the sealed container is increased with nitrogen or air, and the internal pressure is maintained at a predetermined pressure, and then released into an atmosphere having a pressure lower than the internal pressure.
- the flow control plate which is generally used for adjusting the discharge time and uniforming the expansion ratio, uses a throttle plate with a cylinder attached to the orifice plate to release the discharged water system.
- the dispersion angle of the dispersion can be reduced, and the dispersion can be made into polyolefin-based pre-expanded particles of a uniform size to reduce the variation in magnification.
- the orifice plate is a concept including an orifice type, a nozzle type, a bench lily type and the like, and these can be used in combination. This is preferable because polyolefin-based pre-expanded particles which can be retained, have a high magnification, and have a small variation in magnification can be obtained, and the structure is simple.
- the tubular body attached to the orifice plate is integrally attached to the discharge side of the orifice.
- the material of the cylindrical body is not particularly limited, but generally, a metal is used, and the cylindrical body is integrally formed with the orifice plate. In some cases, they can be made as the same thing.
- the opening area on the opposite side where the cylindrical body is attached to the orifice plate cannot be specified unconditionally depending on the size or length of the cylindrical body, but generally it is sufficient if it is at least 1.3 times the orifice opening area. is there. If it is less than 1.3 times, the released polyolefin-based pre-expanded particles may agglomerate or clog. If the length of the cylinder is short, the above problem does not occur, but the effect of the cylinder may not be obtained.
- the impingement plate or container wall referred to in the present invention is a device installed to change the scattering direction of the polyolefin-based pre-expanded particles released from the discharge section.
- the resin hardens and foaming ends. It is considered that when the aqueous dispersion collides with the collision plate or the vessel wall as in the present invention, the temperature and humidity of the foaming atmosphere become more uniform. In addition to reducing the variation in magnification, almost all of the water in the resin particles instantaneously evaporates upon impact to become an effective blowing agent. Can be.
- the collision angle referred to in the present invention means an angle of 90 degrees when colliding from directly in front of the collision plate or the container wall, and 0 degrees when it scatters in parallel with the collision plate or the container wall and does not collide. Values can be between 0 and 90 degrees.
- the collision angle may be any angle at which the polyolefin-based pre-expanded particles can collide, and is not particularly limited, but is preferably 5 degrees or more and 90 degrees or less, and more preferably 10 degrees or more and 45 degrees or less.
- the atmosphere having a pressure lower than the internal pressure of the closed vessel it is sufficient that the pressure is lower than the internal pressure of the closed vessel.
- a pressure near the atmospheric pressure is selected.
- the atmosphere includes the scattering trajectory of the released aqueous dispersion (polyolefin-based pre-expanded particles and aqueous dispersion medium). It generally means the space inside a pipe or duct that is isolated from the outside air.
- the low-pressure atmosphere is preferably maintained at a high temperature, and the ambient temperature is set to 60 ° C. or higher, because the expansion ratio is increased and the variation in the expansion ratio is reduced. It is more preferable that the temperature be kept at 90 ° C. or more and 110 ° C. or less by steam.
- the polyolefin-based pre-expanded particles thus obtained preferably have two melting peaks in a DSC curve obtained by differential scanning calorimetry. Further, the difference between the two melting peak temperatures is preferably 10 ° C. or more. In the case of the polyolefin-based pre-expanded particles having two melting peaks, an in-mold foam molded article having good in-mold foam moldability and excellent mechanical strength and heat resistance can be obtained.
- the DSC curve obtained by the differential scanning calorimetry of the polyolefin-based pre-expanded particles refers to a temperature rise rate of 10 to 10 mg of the polyolefin-based pre-expanded particles of 10 to 10 mg by a differential scanning calorimeter.
- the lower limit of the temperature in the closed vessel is preferably the softening point of the polyolefin resin which is the main component of the polyolefin resin particles, more preferably the melting point, more preferably the melting point + 5 ° C.
- the upper limit is preferably selected from the range of melting point + 20 ° C., more preferably melting point + 15 ° C.
- the polyolefin-based pre-expanded particles obtained as described above can be formed into an in-mold expanded molded article by a conventionally known method.
- Mouth Polyolefin-based pre-expanded particles are compressed by gas pressure, filled in a mold, and heated and fused by steam, etc., using the recovering power of the particles. A method of filling the mold and heat-sealing with steam or the like can be used.
- polyolefin-based pre-expanded particles are subjected to pressure treatment with an inorganic gas and After impregnating with an inorganic gas and applying a predetermined particle pressure, it is softened by heating with steam or the like to produce polyolefin-based pre-expanded particles having a higher expansion ratio (two-stage expansion method). Is also good.
- low pressure in “low pressure foaming atmosphere” refers to a pressure near the atmospheric pressure.
- the polyolefin prefoaming is performed by discharging the contents of the autoclave into a low-pressure foaming atmosphere at 25 ° C at a collision angle of 0 ° (do not impinge) on the container wall through a 3.6 ⁇ opening orifice fitted with a diaphragm.
- the expansion ratio and the expansion ratio Fluctuation and moisture content were measured. Table 1 shows the results.
- Example 1 when discharging the contents from the autoclave, the low-pressure foaming atmosphere was converted into saturated steam at 100 ° C and released while colliding with the vessel wall at a collision angle of 20 ° to release the polyolefin-based reserve atmosphere. Expanded particles were obtained, and physical properties were measured. The results are shown in Table 1. (Example 3)
- Example 1 in preparing resin particles, 0.3 parts by weight of talc (average particle size: 8 ⁇ ) was blended and melt-mixed as an inorganic filler, and the contents were released from the autoclave. At this time, the polyolefin-based pre-expanded particles were released while colliding with the container wall at an impact angle of 20 degrees, and the physical properties were measured. The results are shown in Table 1.
- Example 1 0.3 parts by weight of talc (average particle size: 8 ⁇ ) was used as the inorganic filler, and a low-pressure foaming atmosphere at the time of discharging the contents of the autoclave was set at 100 ° C. Polyolefin-based pre-expanded particles were obtained as saturated water vapor, and physical properties were measured. The results are shown in Table 1.
- Example 1 0.3 parts by weight of talc (average particle size: 8 ⁇ m) was used as the inorganic filler, and a low-pressure foaming atmosphere for discharging the contents of the autoclave was set at 100 ° C. Was released while colliding with the container wall at a collision angle of 20 ° to obtain polyolefin-based pre-expanded particles.
- talc average particle size: 8 ⁇ m
- Example 1 was repeated except that 0.5 parts by weight of melamine (trade name: melamine, manufactured by BASF) having a molecular weight per unit triazine skeleton of 126 was used as the triazine compound. Polyolefin-based pre-expanded particles were obtained in the same manner, and physical properties were measured. The results are shown in Table 1.
- Example 7 Same as Example 5, except that in Example 1, 0.5 parts by weight of melamine (trade name: melamine; manufactured by BASF) having a molecular weight of 126 per unit triazine skeleton was combined as a triazine compound. Polyolefin-based pre-expanded particles were obtained by the method described in the above, and physical properties were measured. Table 1 shows the results.
- melamine trade name: melamine; manufactured by BASF
- Polyolefin-based pre-expanded particles were obtained in the same manner as in Example 1 except that no triazine compound was added, and physical properties were measured. The results are shown in Table 1.
- Polyolefin-based pre-expanded particles were obtained in the same manner as in Example 1 except that hydroxyalkylethanolamine was not added, and physical properties were measured. The results are shown in Table 1.
- Polyolefin-based pre-expanded particles were obtained in the same manner as in Example 6 except that hydroxyalkylethanolamine was not added, and physical properties were measured. The results are shown in Table 1. The method for evaluating the physical properties of the polyolefin-based pre-expanded particles is shown below.
- V (%) (am / av) X 1 00
- Example 1 and Comparative Examples 1 and 2 a polyolefin-based resin composition comprising a hydroxyalkylethanolamine and a compound having a triazine skeleton and a molecular weight per unit triazine skeleton of 300 or less was used.
- the water content of the resin composition increases as compared to when each is used alone, and the foaming ratio increases due to the effect.
- a water-containing effect greater than the sum of the water contents when both are used alone is seen, and a polyolefin-based prefoamer with a higher level of expansion and an expansion ratio than the sum of the effects of both. Particles could be produced. This is also the case when 0.5 parts by weight of a compound having a triazine skeleton and having a molecular weight per unit triazine skeleton of 300 or less is blended (compared with Example 6, Comparative Examples 1 and 3).
- the dispersibility in the autoclave was evaluated.
- As an index of the evaluation of dispersibility when the polyolefin resin particles dispersed in the aqueous dispersion medium in the autoclave are heated to a temperature higher than the softening temperature of the polyolefin resin particles, the inside of the autoclave cannot be stirred and the X indicates the state where foaming was not possible. If pre-foaming was possible, observe the state of the polyolefin resin particles remaining in the autoclave after pre-foaming.If two or more resin particles are bonded, Dispersibility ⁇ , all resin particles were in a state where they were not adhered to each other, and the dispersibility was evaluated as good and ⁇ .
- Example 10 Same as Example 5 except that 0.5 parts by weight of basic tribasic calcium phosphate (dispersing agent) and 0.12 parts by weight of n- sodium paraffin sulfonate (dispersing aid) were charged into the autoclave.
- the polyolefin-based pre-expanded particles were obtained by the above method, and the dispersibility in the autoclave was evaluated in the same manner as in Example 6. Table 2 shows the results. (Example 10)
- Example 5 was repeated except that 0.5 parts by weight of basic tribasic calcium phosphate (dispersing agent) and 0.02 parts by weight of sodium n-paraffin sulfonate (dispersing aid) were charged into the autoclave.
- Polyolefin-based pre-expanded particles were obtained by the same method, and the dispersibility in the autoclave was evaluated by the same method as in Example 6. Table 2 shows the results. (Example 1 1)
- Example 5 was repeated except that 0.5 parts by weight of basic tribasic calcium phosphate (dispersing agent) and 0.16 parts by weight of sodium n-paraffin sulfonate (dispersing aid) were charged into the autoclave.
- Polyolefin-based pre-expanded particles were obtained by the same method, and the dispersibility in the autoclave was evaluated by the same method as in Example 6. Table 2 shows the results. With the compounding amounts shown in Examples 8 to 11, the dispersibility was generally good.
- Example 8 Example 9
- Example 10 Example "Hydroxyalkylethanolamine added amount (parts by weight) 1 1 1 1 Additive
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WO2008030697A2 (en) | 2006-09-08 | 2008-03-13 | Nova Chemicals Inc. | Polymer particles and related articles |
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JP5566634B2 (ja) * | 2008-09-30 | 2014-08-06 | 株式会社カネカ | 金型充填性に優れたポリオレフィン系樹脂多段発泡粒子 |
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JPH10219019A (ja) * | 1997-02-06 | 1998-08-18 | Kanegafuchi Chem Ind Co Ltd | 帯電防止性を有するポリプロピレン系樹脂予備発泡粒子の製造法 |
JPH1192599A (ja) * | 1997-09-25 | 1999-04-06 | Kanegafuchi Chem Ind Co Ltd | ポリオレフィン系樹脂組成物、それからなる予備発泡粒子およびその製法 |
JP2003171516A (ja) * | 2001-09-28 | 2003-06-20 | Kanegafuchi Chem Ind Co Ltd | 発泡性ポリプロピレン系樹脂組成物および、それらからなる予備発泡粒子 |
JP2003192820A (ja) * | 2001-12-27 | 2003-07-09 | Kanegafuchi Chem Ind Co Ltd | ポリオレフィン系予備発泡粒子の製造方法およびその方法により得られる予備発泡粒子 |
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JP3456758B2 (ja) * | 1994-06-28 | 2003-10-14 | 鐘淵化学工業株式会社 | 帯電防止性を有するポリオレフィン系樹脂予備発泡粒子およびその製法 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10219019A (ja) * | 1997-02-06 | 1998-08-18 | Kanegafuchi Chem Ind Co Ltd | 帯電防止性を有するポリプロピレン系樹脂予備発泡粒子の製造法 |
JPH1192599A (ja) * | 1997-09-25 | 1999-04-06 | Kanegafuchi Chem Ind Co Ltd | ポリオレフィン系樹脂組成物、それからなる予備発泡粒子およびその製法 |
JP2003171516A (ja) * | 2001-09-28 | 2003-06-20 | Kanegafuchi Chem Ind Co Ltd | 発泡性ポリプロピレン系樹脂組成物および、それらからなる予備発泡粒子 |
JP2003192820A (ja) * | 2001-12-27 | 2003-07-09 | Kanegafuchi Chem Ind Co Ltd | ポリオレフィン系予備発泡粒子の製造方法およびその方法により得られる予備発泡粒子 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008030697A2 (en) | 2006-09-08 | 2008-03-13 | Nova Chemicals Inc. | Polymer particles and related articles |
EP2064272A2 (en) * | 2006-09-08 | 2009-06-03 | Nova Chemicals Inc. | Polymer particles and related articles |
EP2064272A4 (en) * | 2006-09-08 | 2010-01-20 | Nova Chem Inc | POLYMER PARTICLES AND ASSOCIATED OBJECTS |
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JP4781998B2 (ja) | 2011-09-28 |
JPWO2005080486A1 (ja) | 2007-08-02 |
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