EP3649200A1 - Treated barium sulfate particles and their use - Google Patents
Treated barium sulfate particles and their useInfo
- Publication number
- EP3649200A1 EP3649200A1 EP18727823.9A EP18727823A EP3649200A1 EP 3649200 A1 EP3649200 A1 EP 3649200A1 EP 18727823 A EP18727823 A EP 18727823A EP 3649200 A1 EP3649200 A1 EP 3649200A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- barium sulfate
- sulfate particles
- polymer
- group
- polysiloxane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/027—Barium sulfates
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- C01P2006/62—L* (lightness axis)
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- C01P2006/63—Optical properties, e.g. expressed in CIELAB-values a* (red-green axis)
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- C01P2006/64—Optical properties, e.g. expressed in CIELAB-values b* (yellow-blue axis)
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/12—Treatment with organosilicon compounds
Definitions
- the present invention refers to treated barium sulfate particles intended for use in a polymer with improved dispersibility, color and intrinsic viscosity of the polymer (Polymer Intrinsic Viscosity - Polymer IV), processes for the preparation thereof and its use for preparing polymers for films.
- BaS0 4 is used as a void creator in white BOPET (Biaxially-oriented polyethylene terephthalate - a polyester film made from stretched polyethylene terephthalate (PET)) films. During the bi-axial extension, the void (air) is generated and leads to a white film. The film is mainly used for the last layer in LC-Displays.
- BOPET Biaxially-oriented polyethylene terephthalate - a polyester film made from stretched polyethylene terephthalate (PET)
- BaS0 4 is produced by the precipitation of BaCI 2 or Ba(OH) 2 with Na 2 S0 4 or H 2 S0 4 .
- aftertreatment compounds e.g. silanes and siloxanes to improve among others the dispersibility.
- aftertreatment compounds e.g. silanes and siloxanes to improve among others the dispersibility.
- W02012/025105 describes a functionalized BaS0 for using in (powder) coatings.
- the functional group of the used additive comprises epoxy, vinyl or amino groups.
- the coupling to the surface is done by an aftertreatment of silica or TiO 2 on the surface of the BaS0 4 . Due to the formation of OH-groups of these metal oxides the additive can bond to the core-shell particle. The focus is here to improve abrasion or other physical chemical properties of the final coating.
- the functional group can react with the binder in the coating.
- DE 102007040658 describes the synthesis of a composite of BaS0 4 and a polymer. In this application, the BaSO 4 is treated first with an inorganic aftertreatment and then with different additives (e.g. silanes, also epoxy-silanes) in - - aqueous solution. The particle size is smaller than 350 nm.
- the composite material can be used for plastics, fibers and films.
- barium sulfate is used as a void builder.
- the color and dispersibility of the BaSO 4 has to be on an optimum level.
- the dispersibility has to be high and the color, especially the yellowness, has to be very low.
- the whole process is limited by the intrinsic viscosity of the polymer (IV) of the film. If the viscosity is too low the film producers suffer from many film breakages and have to restart the whole process.
- BaSO 4 is added to the polymer normally there is a drop of the intrinsic viscosity of the polymer which leads to less production through-put.
- One standard product for this application is a BaSO 4 with a polyacrylate aftertreatment which is a standard BaSO4 for films. Compared to the method described here, said standard BaSO 4 has a relative high yellowness and an undesired impact on the intrinsic viscosity of the polymer (Polymer IV). The dispersibility of said standard BaSO4 is also relative high.
- the present invention has several benefits: . . solving all issue (dispersibility, color, intrinsic viscosity of the polymer
- the properties of the plastic are achieved in a simple way by adding the treated BaSO 4 particles to the plastic as one component only, which allows an easier handling and dosing,
- the epoxy group can directly react with the PET and contributes to increasing the intrinsic viscosity of the polymer (Polymer IV) by containing epoxy- groups,
- the siloxane backbone leads to an excellent dispersibility
- additive can be used as a liquid or, if desired, in a diluted solution, and is easy to be sprayed on the dry powder or filtercake of BaSO 4 ,
- the present invention solves the described technical problem by using one additive which can by mixed or sprayed on the surface of the BaSO 4 .
- the additive basically consists of a siloxane backbone and has at least one epoxy-functional group.
- the epoxy-group can react with a breakage side of the PET chain. Such film breakage can occur by release of small amount of water ( ⁇ 25 ppm ) or by thermal decomposition of the polymer chain during the masterbatch process.
- the siloxane backbone has a positive impact on the dispersibility and color of the BaSO 4 .
- the present invention is therefore directed to barium sulfate particles which are treated and the surface of which is at least partially coated with at least one epoxy- functional polysiloxane of the general Formula I,
- n is an integer from 10 to 100, preferably 20 to 60;
- R 1 to R 7 may be the same or different and are selected from the group consisting of:
- -R 8 is an alkyl group having 1 to 20 carbon atoms, optionally having O in the chain, or an oxyalkylene group having 1 to 3 carbon atoms and polymers thereof being selected from (EO) x, (PO) y and copolymers thereof, wherein EO represents an oxyethylene unit, PO represents an oxypropylene unit and x and y may be the same or different and x + y is in the range of 1 to 50, said alkyl group or oxyalkylene group having at least one epoxy group, such as an epoxyalkyl-functional substituent with up to six carbon atoms.
- Tegomer® E-Si 2330 produced by the company Evonik which is a glycidyl-oxypropyl-terminated polydimethylsiloxane (PDMS), a polymeric - - organosilicon compound, i.e. a PDMS with approximately 30 SiO-units and having a 3-(oxiranylmethoxy)propyl-terminal group.
- PDMS polydimethylsiloxane
- a polysiloxane of the general Formula I or mixtures thereof can be used for treating the barium sulfate particles, wherein R 4 and R 8 are the same or different and each of R 4 and R 8 bears an epoxy group.
- a polysiloxane of the general Formula I or mixtures thereof can be used for treating the barium sulfate particles
- n is an integer from 10 to 100, preferably 20 to 60;
- R 1 to R 3 and R 5 to R 7 may be the same or different and are selected from the group consisting of:
- R 4 and R 8 are the same or different and each represents an alkyl group having 1 to 20 carbon atoms, optionally having O in the chain, or an oxyalkylene group having 1 to 3 carbon atoms and polymers thereof being selected from (EO) x , (PO) y and copolymers thereof, wherein EO represents an oxyethylene unit, PO represents an oxypropylene unit and x and y may be the same or different and x + y is in the range of 1 to 50, said alkyl group or oxyalkylene group having at least one epoxy group, such as an epoxyalkyl- functional substituent with up to six carbon atoms, such as a 3- (oxiranylmethoxy)-Ci -C6-alkyl group.
- the barium sulfate to be treated coated with the at least one polysiloxane of the general Formula I has a residual moisture content of less than 1 .0 wt-%, preferably less than 0.5 wt-%, more preferably less than 0.4 wt-%, determined by drying at 160°C to weight constancy.
- the barium sulfate according to the present invention provides a surface, which is at least partially covered by the at least one polysiloxane, preferably accompanied by a low residual moisture content.
- the treatment leads to an improved stability of plastic films containing these coated barium sulfate pigments.
- the low residual moisture content and catching any active sites are responsible for reduced polymer degradation, which is measured as yellow color and polymer IV of the plastics due to thermal stress during the extrusion/molding process or during the lifetime of the plastic article containing the barium sulfate.
- Other impacts on the properties of the plastics, which are impaired by polymer degradation like mechanical strength, will also be reduced.
- the barium sulfate can be treated/coated either with one kind of polysiloxanes of the general Formula I or with a mixture of different kinds of polysiloxanes of the general Formula I as shown above.
- the barium sulfate according to the present invention can be any barium sulfate.
- the barium sulfate according to the present invention may be inorganically or organically surface-modified with further compounds before treating with the at least one polysiloxane of the general Formula I.
- Ultrafine barium sulfate particles without surface modification can be used according to the invention.
- the barium sulfate particles can have an inorganic and/or organic surface modification.
- the inorganic surface modification of the barium sulfate typically consists of at least one inorganic compound selected from aluminium, antimony, barium, calcium, cerium, chlorine, cobalt, iron, phosphorus, carbon, manganese, oxygen, sulfur, silicon, nitrogen, strontium, vanadium, zinc, tin and/or zirconium compounds or salts.
- Sodium silicate, sodium aluminate and aluminium sulfate are cited by way of example.
- the inorganic surface treatment of the ultrafine BaSO4 may take place in an aqueous slurry.
- the reaction temperature should preferably not exceed 50° C.
- the pH of the suspension is set to pH values in the range above 9, using NaOH for example.
- the post-treatment chemicals inorganic compounds
- water-soluble inorganic compounds such as, for example, titanium, aluminium, antimony, barium, calcium, cerium, chlorine, cobalt, iron, phosphorus, carbon, manganese, oxygen, sulfur, silicon, nitrogen, strontium, vanadium, zinc, tin and/or zirconium compounds or salts, are then added whilst stirring vigorously.
- the pH and the amounts of post-treatment chemicals are chosen according to the invention so that the latter are completely dissolved in water.
- the suspension is stirred intensively so that the post-treatment chemicals are homogeneously distributed in the suspension, preferably for at least 5 minutes.
- the pH of the suspension is lowered. It has proved advantageous to lower the pH slowly whilst stirring vigorously.
- the pH is particularly advantageously lowered to values from 5 to 8 within 10 to 90 minutes.
- a maturing period preferably a maturing period of approximately one hour.
- the temperatures should preferably not exceed 50° C.
- the aqueous suspension is then washed and dried. Possible methods for drying ultrafine, surface-modified BaSO4 include spray-drying, freeze-drying and/or mill-drying, for example. Depending on the drying method, a subsequent milling of the dried powder may be necessary. Milling can be performed by methods known per se.
- the organically surface-modified barium sulfate particles optionally have one or more functional groups, for example one or more hydroxyl, amino, carboxyl, epoxy, vinyl, methacrylate and/or isocyanate groups, thiols, alkyl thiocarboxylates, di- and/or polysulfide groups.
- one or more functional groups for example one or more hydroxyl, amino, carboxyl, epoxy, vinyl, methacrylate and/or isocyanate groups, thiols, alkyl thiocarboxylates, di- and/or polysulfide groups.
- the surface modifiers can be chemically and/or physically bound to the particle surface.
- the chemical bond can be covalent or ionic.
- Dipole-dipole or van der Waals bonds are possible as physical bonds.
- the surface modifiers are preferably bound by means of covalent bonds or physical dipole-dipole bonds. - -
- the surface-modified barium sulfate particles have the ability to form a partial or complete chemical and/or physical bond with the polymer matrix via the surface modifiers and the siloxane of the general formula I.
- Covalent and ionic bonds are suitable as chemical bond types.
- Dipole-dipole and van der Waals bonds are suitable as physical bond types.
- the barium sulfate can also be pretreated with an alcohol such as TMP (trimethylolpropan) or with a reactive silane having reactive Si-H moieties or other reactive polysiloxanes having Si-OR moieties in order to additionally modify the surface of the pigment particles and to increase the dispersibility of the particles.
- an alcohol such as TMP (trimethylolpropan) or with a reactive silane having reactive Si-H moieties or other reactive polysiloxanes having Si-OR moieties in order to additionally modify the surface of the pigment particles and to increase the dispersibility of the particles.
- the barium sulfate is a pigment being treated with hydrated inorganic precursors of silicon dioxide and/or aluminium oxide, optionally dried to weight constancy and then treated with at least one polysiloxane of the general Formula I.
- the present invention also provides a method for producing a coated barium sulfate according to the present invention comprising the step of treating barium sulfate particles with at least one polysiloxane of the general Formula I or mixtures thereof,
- - n is an integer from 10 to 100, preferably 20 to 60;
- R 1 to R 7 may be the same or different and are selected from the group consisting of:
- - -R 8 is an alkyl group having 1 to 20 carbon atoms, optionally having O in the chain, or an oxyalkylene group having 1 to 3 carbon atoms and polymers thereof being selected from (EO) x, (PO) y and copolymers thereof, wherein EO represents an oxyethylene unit, PO represents an oxypropylene unit and x and y may be the same or different and x + y is in the range of 1 to 50, said alkyl group or oxyalkylene group having at least one epoxy group, such as an epoxyalkyl-functional substituent with up to six carbon atoms, or
- R 4 and R 8 are the same or different and each of R 4 and R 8 bears an epoxy group.
- the treating step is preferably carried out at ambient temperature but might also be carried out at an elevated temperature in the range of up to 100°C. Due to the elevated temperature, any additional water is driven out of the barium sulfate and the surface of the barium sulfate with its active sites is covered by the at least one polysiloxane.
- the treating step can also be carried out as a two-step or multi-step process in which the at least one polysiloxane of the general Formula I is added to the pigment in several steps which stages might be interrupted each by a milling or kneading step.
- Conventional dispersing methods in particular using melt extruders, high-speed mixers, triple roll mills, ball mills, bead mills, submills, ultrasound or kneaders, may also be used to disperse the barium sulfate in the masterbatch or in an organic substance.
- the use of submills or bead mills with bead diameters of d ⁇ 1 .5 mm is particularly advantageous.
- the barium sulfate is used in a pre-dried form having a residual moisture content of less than 1 wt-%, preferably less than 0.5 wt-%, more preferably less than 0.4 wt-%, determined by drying at 160°C to weight constancy.
- an elevated temperature during the treating _ - of the barium sulfate with at least one polysiloxane of the general Formula I is not mandatory.
- the barium sulfate thermally until a residual moisture content of less than 1 .0 wt-%, preferably less than 0.5 wt-%, more preferably less than 0.4 wt-%, determined by drying at 160°C to weight constancy, is achieved, followed by treating the obtained barium sulfate with the at least one polysiloxane of the general Formula I.
- the step of treating the barium sulfate with said at least one polysiloxane of the general Formula I is carried out for less than 12 h, preferably less than 6 h, more preferably less than 4h, most preferably between 0.25 to 2 h.
- the treating can comprise spraying, milling and/or kneading of the barium sulfate particles being brought in contact with the at least one siloxane of the general formula I.
- the so obtained barium sulfate particles are suitable for use as an additive for a thermoplastic polymer, preferably selected from polyacrylates, polyamides, polyalkylenes, polyethers, polyesters, PET.
- a thermoplastic polymer preferably selected from polyacrylates, polyamides, polyalkylenes, polyethers, polyesters, PET.
- the treated barium sulfate particles are added to the polymer in solid, semi-solid or liquid/molten form, optionally mixed and subjected to a plastics forming process, preferably an injection molding process, a compression molding process, a pressing process or an extrusion process whereby a masterbatch or a moulded article is obtained.
- the polymer according to the invention may contain a polymer matrix having 0.1 to 70 wt. % of barium sulfate particles, with average particles sizes from 40 nm to 1 ,5 ⁇ .
- the barium sulfate particles can be both surface- modified and non-surface-modified.
- the polymer according to the invention can also contain components known per se to the person skilled in the art, for example mineral fillers, glass fibers, stabilisers, process additives (also known as protective systems, for example dispersing aids, release agents, antioxidants, anti-ozonants, etc.), pigments, flame retardants (e.g. aluminium hydroxide, antimony trioxide, magnesium hydroxide, etc.), vulcanisation accelerators, vulcanisation retarders, zinc oxide, stearic acid, sulfur, peroxide and/or plasticisers.
- process additives also known as protective systems, for example dispersing aids, release agents, antioxidants, anti-ozonants, etc.
- pigments e.g. aluminium hydroxide, antimony trioxide, magnesium hydroxide, etc.
- vulcanisation accelerators e.g. aluminium hydroxide, antimony trioxide, magnesium hydroxide, etc.
- vulcanisation retarders zinc oxide, stearic acid, sulfur, peroxide and/or plastic
- the treated particles are added to the polymer in a weight ratio of 0,1wt.-% to 70 wt.-%, preferably 10 wt.-% to 60 wt.-%, related to the total weight of the final polymer product.
- the plastics forming process is usually carried out at a temperature in the range of 200°C to 450°C, preferably in the range of 250°C to 370°C.
- moulded articles with improved properties such as improved dispersibility, color and intrinsic viscosity are obtainable, preferably in the form of a PET-film having reduced film breakages.
- IV Polymer Intrinsic Viscosity
- the intrinsic viscosity of the material is found by extrapolating to zero concentration of relative viscosity to concentration which is measured in deciliters per gram (dt/g). Intrinsic viscosity is dependent upon the length of its polymer _ - chains but has no units due to being extrapolated to zero concentration. The longer the polymer chains the more entanglements between chains and therefore the higher the viscosity. The average chain length of a particular batch of resin can be controlled during polycondensation.
- the particle size of the inventive barium sulfate was determined by a Mastersizer MS 2000 via a laser diffraction particle size analysis.
- 1 g of powder is dispersed with 50 ml Calgon solution, 1 g/l, for 10 min with stirring in the ultrasonic bath.
- the suspension is introduced into the measuring room filled with water up to a suitable optical concentration.
- the measurement is carried out after another 10s ultrasonic bath.
- the evaluation is done according to Fraunhofer.
- the particle sizes are specified for x 10 , xso and x 90 .
- adding a chain extender to the whole film masterbatch as known in the state of art leads to increasing production cost and also imparts often a high - - toxicity to the obtained product due to the chain extender itself. Also a further production step where the dosage has to be checked is needed.
- the yellowness is important for the film production.
- the films are used as reflector films in LCD for TV's. If the yellowness is too high the reflectivity is too low. With standard BaSO4, a reflectivity of up to 98 % can be reached, with the new grade 99 % or even higher because the L * is also higher compared to standard BaSO 4 (see below in the Tables). In view of the improved color values, the influences on any color changes and distortion are reduced.
- a further benefit is that the additives do not lead to any smells during the production. Often free sulphide ions are responsible for a smell. The siloxane coating can catch these sulphide ions. Such free sulfide ions are usually residues of the starting material from the BaSO production. BaSO is typically precipitated by BaS. A very small amount of sulfide ions can remain on the surface of the BaSO 4 .
- the inventive particles nor any product manufactured therewith do suffer from any disturbing smells.
- the inventive new grade can be produced on the same production line as the standard BaSO 4 without any production step changes.
- BaS04 in the form of dried powder was sprayed with 0.5 - 1 ,0 wt.-% Epoxysiloxane (Evonik E-SI 2330) at room temperature.
- Epoxysiloxane Evonik E-SI 2330
- the mixed product is steam jet milled and packed.
- a masterbatch of PET (Typ RT6020 from Invista Resin & Fibers GmbH) with the product is prepared in the application laboratory.
- the dispersibility is verified by the internal DF test (pressure filter test) and the resulting PET Masterbatch chips are analyzed by the color index (Lab color- test) and the viscosity test to determine the intrinsic viscosity of the polymer (Polymer IV).
- Controlling the dispersion of the masterbatch chips as prepared is made in line with DIN 13900-5 with a pressure filter test.
- the material is pressed at a temperature of approximately 280 °C under constant pressure (50 bar) by means of a twin-screw extruder at 40 rpm through a 17 ⁇ filter on a supporting fabric.
- the pressure increase due to non-passing material is measured.
- the pressure increase may not be above 20 bar per 5 kg master batch (MB) over the whole test.
- the color of an object may be evaluated by means of the Lab color space system.
- the Lab color space describes mathematically all perceivable colors in the three dimensions L for lightness and a and b for the color opponents green-red and blue-yellow.
- the measurements are carried out in line with EN ISO 1 1664-4 StammColorimetry - Part 4: CIE 1976 L * a * b * Colour space", formerly DIN 6174.
- As a light source normed light D65 is used and the masterbatch chips should have a L * -value of more than 90, an a * -value of between -1 ,0 and -0,5 and a b * -value of significantly below 15.
- a polymer has been mixed in differing amounts with barium sulfate particles according to the present invention with 0,5 wt.-% siloxane with the general Formula I and barium sulfate particles according to the prior art, in this case standard BaSO 4 in different amounts.
- the polymers containing the inventive barium sulfate particles show superior overall properties with respect to color values, dispersibility and intrinsic viscosity of the polymer, in particular after a long time storage.
- One sample of the inventive material was batched into PET after 4, 6 and 12 months and the color data, the pressure filter test data (DF) and the Polymer IV were checked.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17179878.8A EP3425009A1 (en) | 2017-07-05 | 2017-07-05 | Surface modified barium sulfate particles and their use |
PCT/EP2018/064489 WO2019007598A1 (en) | 2017-07-05 | 2018-06-01 | Treated barium sulfate particles and their use |
Publications (1)
Publication Number | Publication Date |
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EP3649200A1 true EP3649200A1 (en) | 2020-05-13 |
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EP17179878.8A Withdrawn EP3425009A1 (en) | 2017-07-05 | 2017-07-05 | Surface modified barium sulfate particles and their use |
EP18727823.9A Withdrawn EP3649200A1 (en) | 2017-07-05 | 2018-06-01 | Treated barium sulfate particles and their use |
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EP17179878.8A Withdrawn EP3425009A1 (en) | 2017-07-05 | 2017-07-05 | Surface modified barium sulfate particles and their use |
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EP (2) | EP3425009A1 (en) |
JP (1) | JP2020525625A (en) |
CN (1) | CN110832035A (en) |
TW (1) | TW201906911A (en) |
WO (1) | WO2019007598A1 (en) |
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CN115612313B (en) * | 2022-10-24 | 2024-02-06 | 江西广源化工有限责任公司 | Preparation method and application of low-oil-absorption barite powder and high-solid coating |
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JP3515282B2 (en) * | 1996-06-07 | 2004-04-05 | 京セラケミカル株式会社 | Electrostatic image developing toner and electrostatic image developing method |
DE10005685A1 (en) | 2000-02-09 | 2001-08-23 | Sachtleben Chemie Gmbh | Barium sulfate, process for its preparation and its use |
DE102004029074A1 (en) * | 2004-06-16 | 2005-12-29 | Degussa Ag | Paint formulation for improving the surface properties |
CN101186756A (en) * | 2006-05-02 | 2008-05-28 | 信越化学工业株式会社 | Flame retardant resin composition with decreased volatility of low molecular weight siloxane |
DE102007040658A1 (en) | 2006-08-25 | 2008-03-13 | Institut Für Verbundwerkstoffe Gmbh | Composites with good mechanical and tribological properties, useful e.g. for injection molding, comprise fine barium sulfate particles in (thermo)plastic and/or epoxy resin matrix |
CA2661509A1 (en) * | 2006-08-25 | 2008-02-28 | Sachtleben Chemie Gmbh | Barium sulfate-containing composite |
DE102008000367A1 (en) * | 2008-02-19 | 2009-08-20 | Evonik Degussa Gmbh | Process for the preparation of coated rubber particles and coated rubber particles |
JP2009203339A (en) * | 2008-02-27 | 2009-09-10 | Jsr Corp | Stamper forming composition, stamper, and method for manufacturing optical information recording medium |
CN101418140B (en) * | 2008-11-20 | 2012-03-07 | 胡智勇 | Preparation method of surface modified barium sulfate base ultrafine function powder material |
JP2013526639A (en) * | 2010-05-20 | 2013-06-24 | サハトレーベン・ヒェミー・ゲーエムベーハー | Functionalized particles and uses thereof |
EP2940089A4 (en) * | 2012-12-27 | 2016-08-03 | Asahi Glass Co Ltd | Back coating composition and mirror |
DE102013226800A1 (en) * | 2013-12-20 | 2015-06-25 | Evonik Industries Ag | Surface treatment of particles and their use |
TWI558774B (en) * | 2014-03-14 | 2016-11-21 | 莎哈利本化學有限公司 | Process for the surface treatment of particles, the so obtained particles and their use |
CN105153992B (en) * | 2015-08-26 | 2018-05-25 | 中国科学院化学研究所 | It is a kind of using polysiloxane-modified filler and preparation method and application |
EP3344704B1 (en) * | 2015-08-31 | 2019-07-31 | BYK-Chemie GmbH | Copolymers containing polyether-polysiloxane macromonomer units, process of their preparation and their use in coating compositions and polymeric moulding compounds |
-
2017
- 2017-07-05 EP EP17179878.8A patent/EP3425009A1/en not_active Withdrawn
-
2018
- 2018-06-01 EP EP18727823.9A patent/EP3649200A1/en not_active Withdrawn
- 2018-06-01 JP JP2019572638A patent/JP2020525625A/en active Pending
- 2018-06-01 WO PCT/EP2018/064489 patent/WO2019007598A1/en unknown
- 2018-06-01 CN CN201880044197.5A patent/CN110832035A/en active Pending
- 2018-06-11 TW TW107119944A patent/TW201906911A/en unknown
Also Published As
Publication number | Publication date |
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TW201906911A (en) | 2019-02-16 |
JP2020525625A (en) | 2020-08-27 |
WO2019007598A1 (en) | 2019-01-10 |
EP3425009A1 (en) | 2019-01-09 |
CN110832035A (en) | 2020-02-21 |
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