IE83257B1 - Plasticizer-free moulding mass based on polyvinylchloride - Google Patents

Plasticizer-free moulding mass based on polyvinylchloride

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Publication number
IE83257B1
IE83257B1 IE1990/3045A IE304590A IE83257B1 IE 83257 B1 IE83257 B1 IE 83257B1 IE 1990/3045 A IE1990/3045 A IE 1990/3045A IE 304590 A IE304590 A IE 304590A IE 83257 B1 IE83257 B1 IE 83257B1
Authority
IE
Ireland
Prior art keywords
weight
moulding compound
parts
oxide
plasticiser
Prior art date
Application number
IE1990/3045A
Other versions
IE903045A1 (en
Inventor
Baumgartel Hans-Georg
Van Cleemputte Willy
Walz Peter
Original Assignee
Solvay Kunststoffe Gmbh
Filing date
Publication of IE83257B1 publication Critical patent/IE83257B1/en
Priority claimed from DE3927777A external-priority patent/DE3927777A1/en
Application filed by Solvay Kunststoffe Gmbh filed Critical Solvay Kunststoffe Gmbh
Publication of IE903045A1 publication Critical patent/IE903045A1/en

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Classifications

    • 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
    • C08K5/098—Metal salts of carboxylic acids
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride

Description

PLASTICIZER—FREE MOULDING MASS BASED ON POLYVINYLCHLORIDE SOLVAY KUNSTSTOFFE GMBH Description The present invention relates to a plasticiser—free moulding compound on the basis of polyvinyl chloride, containing a plastics material consisting of vinyl chloride homopolymer, copolymer and/or terpolymer, mixtures thereof or compounds therewith, having a PVC content of more than 70% by weight, preferably more than 85% by weight, and 15 to 0% by weight of at least one impact-modifying polymer, selected from the group of polyalkyl acrylates, chlorinated polyethylenes, ethylene/vinyl acetate copolymer or ethylene/vinyl acetate/carbon monoxide terpolymer, and other additives, processing aids and the like. According to, the invention, the plastics moulding compound on the basis of polyvinyl chloride contains.certain parts by weight of at least one co-stabiliser, surface-treatedt alkaline earth oxide and/or partly hydrated alkaline earth oxide and additional auxiliaries.
The invention furthermore relates to a method for preparing the moulding compound and the use of the same in extrusion processes.
A rigid, heat-stabilised composition on the basis of vinyl chloride polymers, which contains as heat stabilisers magnesium oxide and a saturated polyvalent aliphatic alcohol, and also calcium and zinc stearate and other processing aids and additives, is already known from EP-B-0 001 859. These heat-stabilised compositions are particularly suitable for the They have the advantage that they are free from lead and cadmium. production of tubes and profiles.
The thermal stability and processing properties of these compositions are however in need of improvement.
It was an object of the present invention to discover a moulding compound having improved properties and/or improved processing properties and a method for the preparation of the same and/or that the moulded parts produced from the moulding compound should have improved properties. In particular, improved thermal stability of the moulding material during processing was to be achieved. Furthermore, additionally lead- containing and cadmium-containing stabilisers were to be avoided. when processing the moulding compound in an extruder, the risk of corrosion occurring was to be avoided.
It was established according to the invention that these objects are met by a plasticiser-free moulding compound on the basis of polyvinyl chloride, containing a plastics material, vinyl chloride homopolymer, copolymer and/or terpolymer, mixtures thereof or compounds therewith, having a vinyl chloride or PVC content of more than 70% by weight, preferably more than-85% by weight, and 15 to 0% by weight of at least one impact-modifying polymer, selected from the group of polyalkyl acrylates, chlorinated polyethylenes, ethylene/vinyl acetate copolymers or ethylene/vinyl acetate/carbon monoxide terpolymers.
Per 100 parts by weight of this PVC mixture or of the .vinyl chloride mixed polymer, the moulding compound contains a)’ 0.01 to 3 parts by weight of at least one calcium carboxylate, b) 0.01 to 3 parts by weight of at least one zinc carboxylate, c) 0.01 to 3 parts by weight of at least one organic co-stabiliser, selected.from the group of at least one 3-diketone, organic phosphite and/or dihydro— pyridine, optionally pigments, dyes, lubricants, blowing agents, flame retardants, fillers, reinforcing fibres or other processing aids and additives, and, according to the invention, d) 0.01 to 5 parts by weight of at least one alkaline earth oxide, alkaline earth hydroxide and/or partly hydrated alkaline earth oxide, preferably calcium oxide and/or magnesium oxide, and/or partly hydrated calcium oxide and/or partly hydrated magnesium oxide and/or_calcined dolomite or partly hydrated calcined dolomite, with the alkaline earth oxide, alkaline earth hydroxide and/or partly hydrated alkaline earth oxide, preferably the calcium oxide and/or magnesium oxide, and/or the partly hydrated calcium oxide and/or partly hydrated magnesium oxide and/or the calcined dolomite or the partially hydrated calcined dolomite being coated on the entire, surface or in partial regions of the surface with a surface—modifying treatment agent or coating agent.
Salts of calcium and/or zinc with fatty acids and/or derivatives thereof, preferably of fatty acids additionally containing polar groups, with C8 to Cu, preferably Cm to Ca, are used as calcium and/or zinc carboxylates. Preferably C5 to Cm fatty acids,v derivatives thereof and/or mixtures thereof, in particular also fatty acids containing additional polar groups, are used. Stearates, hydroxystearates, palmitates and/or behenates or fatty acids or fatty acid derivatives of these compounds which contain additional polar groups, preferably hydroxyl groups, have proved particularly suitable.
According to a preferred embodiment, the moulding compound additionally contains e) 0.01 to 15 parts by weight of at least one filler, preferably at least one inorganic filler.
According to another preferred embodiment, the moulding compound additionally contains per 100 parts by weight of the PVC mixture or the vinyl chloride mixed polymer f) 0.01 to 5 parts by weight of at least one external lubricant and/or internal lubricant, and/or g) 0.01 to 5 parts by weight of a processing aid or ‘ additive, preferably selected from the group of polymeric alkyl methacrylates.
According to a preferred embodiment of the invention, per 100 parts by weight of the plastics material or plastics mixture, additionally a)~ 0.05 to 1.5 parts by weight of at least one calcium carboxylate, ‘b) 0.05 to 1.5 parts by weight of at least one zinc carboxylate, c) 0.05 to 2 parts by weight of at least one organic co-stabiliser, selected from the group of at least one fi—diketone, organic phosphite and/or dihydro- pyridine, d) 0.05 to 1 part by weight calcium oxide and/or magnesium oxide, e) 0.05 to 10 parts by weight of at least one filler, preferably an inorganic filler, f) 0.5 to.5 parts by weight of at least one pigment and/or dye, lubricant and/or internal lubricant, g) 0.5 to 3.5 parts by weight of a processing aid or additive, selected from the group of polymeric alkyl methacrylates, preferably polymethyl methacrylate, are contained in the moulding compound.
Preferably a benzoylstearoyl methane is used as fl-diketone within the scope of the invention.
Preferably triphenyl phosphite, trilauryl phosphite,. diphenyldecyl phosphite, tridecyl phosphite and/or phenyldidecyl phosphite are added to the moulding compound as phosphites.
According to a preferred embodiment of the invention, up to 70% by weight (relative to 100% by weight of the co-stabiliser used), preferably up to 50% by weight, of the co-stabiliser, selected from the group of at least one B—diketone, organic phosphite and/or dihydro— The content of the polyol should if possible be below 50% by weight, pyridine, is replaced by a polyol. particularly preferably below 40% by weight (relative to 100% by weight of the co-stabiliser used), in order to achieve improved heat stabilisation of the moulding compound.
Preferably trimethylol propane, di—trimethylol propane, pentaerythrite and mixtures of these polyols with each other or with other polyols are used as polyols.
According to a further embodiment, the polyol which is ‘ used in a certain proportion as co—stabiliser is replaced by a polyether polyol.
According to another preferred embodiment, the moulding compound additionally contains per 100 parts by weight of the PVC mixture or of the vinyl chloride mixed polymer, in addition to the additives already mentioned, h) 0.01 to 10 parts by weight, preferably 0.5 to 5 parts by weight, of a pigment and/or dye, and/or i) 0.05 to 4 parts by weight, preferably 0.1 to 2 parts by weight, of at least one expanding agent and/or j) 0.5-to 10 parts by weight, preferably 1 to 8 parts by weight, of at least one flame retardant, or the moulding compound consists thereof.
Organic-Chemical and/or inorganic-chemical expanding ‘agents are used as expanding agents, preferably those which eliminate nitrogen or carbon dioxide in heat.
Preferably expanding agents from the group of azodicarbonamides and/or sodium bicarbonates are used.
The flame retardants known for plastics materials, preferably aluminium hydroxide and/or antimony trioxide, are used as flame retardants.
As already mentioned, according to the invention the calcium oxide, magnesium oxide, partly hydrated calcium oxide, partly hydrated magnesium oxide, the calcined dolomite and/or partly hydrated calcined dolomite is coated with a surface—modifying treatment agent or coating agent on its entire surface or in partial regions of the surface, and the surface-modifying treatment agent or coating agent is a saturated or unsaturated fatty acid or esters, salts or derivatives thereof.
According to a preferred embodiment of the invention, both the filler or the filler mixture or a portion of the filler or the filler mixture and the calcium oxide and/or the magnesium oxide is coated with a surface- modifying treatment agent or coating agent on its entire surface or in partial regions, and the surface- modifying treatment agent or coating agent is a._ saturated or unsaturated fatty acid or esters, salts or derivatives thereof.
The surface treatment agents or coating agents are applied in the form of a solution, dispersion, melt and the like. surface treatment agent or coating agent is applied in the hot state or in the form of a melt to the alkaline earth oxide or partly hydrated alkaline earth oxide, According to a preferred embodiment, the preferably to the calcium oxide, magnesium oxide, partly hydrated calcium oxide, partly hydrated magnesium oxide, to the calcined dolomite or the partly hydrated, calcined dolomite. Preferably a hot mixer or a hot mixer/cooling mixer combination is used for this purpose.
The application of the surface treatment agent to the filler is preferably effected in the form of a dispersion or solution of the surface treatment agent or coating agent.
According to a preferred embodiment of the invention, the calcium oxide, magnesium oxide, partly hydrated calcium oxide, partly hydrated magnesium oxide, the calcined dolomite and/or the partly hydrated calcined dolomite is surface—modified with a saturated or unsaturated fatty acid which additionally bears at least one OH group or at least one other polar group in addition to the COOH, ester and/or COO group.
According to another preferred embodiment, the calcium oxide and/or magnesium oxide and/or the filler or the filler mixture or a portion of the filler or the filler mixture which preferably contains or consists of finely divided calcium carbonate is surface—modified with at least one saturated or unsaturated fatty acid, esters, salts or derivatives thereof, which additionally bears at least one OH group or at least one other polar group in addition to the COOH, ester and/or COO group.
Saturated and/or unsaturated monocarboxylic acids or polycarboxylic acids, their derivatives, substituted »compounds and/or salts which contain one or more hydroxyl group(s), amino group(s), carbonyl group(s) and/or ester group(s) are used as organic carboxylic acids containing polar groups. The salts of the monocarboxylic acids, preferably the fatty acids, or the acids themselves are preferred.
Preferably the fatty acids, bearing additional polar groups, with C8 to C9, preferably cm to Ca, which consist entirely of saturated fatty acid bearing at least one additional polar group or contain up to 20% by weight, preferably up to 6% by weight, of an unsaturated fatty acid containing at least one additional polar group are used. Preferably the fatty acids containing polar groups, preferably fatty acids containing hydroxyl groups or fatty acids containing amino groups, preferably hydroxystearic acid, hydroxypalmitic acid, hydroxyoleic acid, aminostearic acid, aminolinoleic acid and/or the alkali salts of this compound are used for the surface treatment of the fillers and/or of magnesium oxide and/or calcium oxide.
According to a preferred embodiment, a synthetic surface—coated calcium carbonate is used as filler, preferably produced by introducing carbon dioxide into a calcium hydroxide suspension and by subsequent surface treatment of the resulting calcium carbonate with an alkali or ammonium salt of a saturated or unsaturated aliphatic monocarboxylic acid or fatty acid containing in addition to a carboxylic acid, fatty acid or substituted fatty acid containing at least one polar group, preferably with an alkali or ammonium salt, at least one hydroxyl, carbonyl, amino and/or ester group.
In this case, during the surface treatment the corresponding calcium compound of this fatty acid containing polar groups is formed entirely or partly on the surface of the calcium carbonate.
The surface layer formed on the surface of the synthetic calcium carbonate after the application of- the treatment agent preferably consists of or contains a calcium and/or alkali salt, and also optionally ammonium salt of at least one fatty acid with Cm to Ca, containing at least one hydroxyl group.
According to another embodiment, a singly or multiply unsaturated, preferably a doubly unsaturated conjugated or non—conjugated carboxylic acid, preferably an alkali salt thereof or an ammonium salt of a singly or doubly unsaturated carboxylic acid, or a mixture thereof, is used as surface treatment agent for the fillers and/or for the calcium oxide and/or magnesium oxide (or partly hydrated compounds thereof) as unsaturated carboxylic- acid, in particular crotonic acid, 2—pentenoic acid, 4-pentenoic acid, 2—hexenoic acid, 3—hexenoic acid, 2,4-pentadienoic acid, 3-butenoic acid and/or 3—methyl- crotonic acid, but.preferably sorbic acid. - 110 to 120°C.
According to a preferred embodiment, up to 60% by weight (relative to 100 parts by weight of the carboxylic acids used for surface treatment), preferably up to 40% by weight, of the singly or multiply unsaturated carboxylic acid or carboxylic - acids or a mixture thereof is replaced by a saturated and/or unsaturated monocarboxylic acid with C2 - Cg containing a polar group in addition to the carboxyl groups and/or humic acid.
According to a preferred embodiment of the invention, up to 60% by weight (relative to 100 parts by weight of the modifying agent used), preferably up to 35% by weight, of the alkyl acrylate used as modifying agent, preferably butyl acrylate, is replaced by polymethyl methacrylate (PMMA).
The vinyl chloride homopolymer, copolymer and/or terpolymer contained in the moulding compound preferably has a K value of 58 to 73. Particularly preferably, K values of 64 to 71 are used.
The present invention furthermore relates to a.method for producing the plasticiser-free moulding compound.
According to the method of the invention, the plastics materials and the additives are mixed in a hot mixer at temperatures above 35°C and are heated with a temperature increase to temperatures between 100 and 125°C (calculated as compound temperature), preferably Then the moulding compound is cooled in a cooling mixer to temperatures below 40°C, preferably below 35°C.
According to a preferred embodiment, the plastics material or the plastics mixture and the additives which are solid at ambient temperature (with the exception of titanium dioxide) are pre-mixed at 35 to 50°C, preferably 37 to 45°C, in a hot mixer, the liquid additives are admixed thereto after an increase in temperature when a temperature of between 55 and 65°C, preferably 57 to 62°C, is reached, and subsequently is mixed further with a temperature increase to 100 to 125°C (calculated as compound temperature), preferably 110 to 120°C. a cooling mixer to temperatures of below 40°C, Then the moulding compound is cooled in preferably below 35°C.
When using titanium dioxide as a pigment, the addition of titanium dioxide to the plastics/additives mixture pre-mixed in the hot mixer is effected in the range of 90 to 125°C (calculated as compound temperature), preferably 110 to 120°C, and then the moulding compound is cooled in a cooling mixer to temperatures below 40°C, preferably below 35°C.
According to a preferred embodiment, the alkaline earth oxide or partly'hydrated alkaline earth oxide, preferably calcium oxide and/or magnesium oxide, partly hydrated calcium oxide and/or partly hydrated magnesium oxide and/or the calcined dolomite or partly hydrated, calcined dolomite has an average particle size of less than 25 pm, preferably less than 5 pm. Particularly preferably, average particle sizes of between 0.5 and pm are used.
According to a preferred embodiment, the weight of the modifying agent or coating agent used for surface treatment, dependent on the particle size of the alkaline earth oxide or partly hydrated alkaline earth oxide, preferably of the calcium oxide, magnesium oxide and/or partly hydrated calcium oxide and/or magnesium oxide is 0.02 to 4.5% by weight, preferably 0.5 to 2.5% by weight, relative to 100 parts by weight alkaline earth oxide or partly hydrated alkaline earth oxide.
According to a preferred embodiment, the filler or the filler mixture has an average particle size of less than 10 um, preferably less than 1 pm. preferred embodiment, the average particle size of the alkaline earth oxide or partly hydrated alkaline earth According to a oxide used is at least twice as large as the average particle size of the filler or filler mixture.
The present invention furthermore relates to the use of the plasticiser-free moulding compound in extrusion or injection-moulding processes for the production of profiles or articles or hollow bodies, preferably extruded window profiles or extruded tubes.
The moulded parts and profiles produced from the plasticiser-free moulding compounds according to the invention have a very good surface condition (a uniform, smooth surface). The processing properties and properties of the finished articles or of the profiles including the subsequent treatment thereof (such as cutting, welding, drilling, sawing, bending and the like) is comparable with or better than those moulded parts or profiles which are produced using compounds containing barium, cadmium or lead.
Examgle 1 Group Parts by weight Suspension vinyl chloride homopolymer (K value 68) 100 Polymethyl nethacrylate (PMMA) 9 1 Talcun (micronised) e 10 Benzoylstearoyl methane c 0.1 1,k-dihydropyridine c 0.2 Diphenyldecyl phosphite c 0.? Calcium stearate a 0.8 Zinc octoate b 0.4 Calcium oxide, coated with 2% by weight hydroxystearic d 0.1 acid (relative to 100 parts by weight Cao) Magnesium oxide, coated with 2% by weight hydroxy~ d 0.15 palmitic acid (relative to 100 parts by weight M90) Mixture of internal and external lubricants with the f 0.75 joint use of montan waxes Hard paraffin f 0.2 Partly oxidised hard paraffin f 0.1 Example 2 Zinc octoate Group Parts by weight Suspension vinyl chloride homopolymer (K value 68) 100 with 8 parts by weight modifying agent, consisting of butyl acrylate and polymethyl methacrylate Polymethyl methacrylate (PHMA) 9 1 Natural calciun carbonate (ground chalk) surface~ e 10 modified with stearic acid Titaniun dioxide h 4 Benzoylstearoyl methane c 0.1 1,4-dihydropyridine c 0.1 Trilauryl phosphite c 0.5 Mixture of trimethylol propane, di-trimethylol propane c 0.5 and pentaerythrite Calciun behenate a 0.4 Magnesiun oxide, coated with 2% by weight d 0.25 hydroxystearic acid (relative to 100 parts by weight M90) Mixture of internal and external lubricants with the f 0.75 joint use of montan waxes Hard paraffin f .1 Partly oxidised hard paraffin f .1 Examgle 3 Group Parts by weight Vinyl chloride graft polymer with 6% by weight butyl 100 acrylate Polymethyl methacrylate (PMA) 9 1 - synthetic calciun carbonate (CCP) coated with 2% by e 5 weight hydroxystearic acid (relative to 100 parts by weight CaCo3) Titaniun dioxide h 4 Benzoylstearoyl methane c 0.1 1,4-dihydropyridine c 0.1 Phenyldidecyl phosphite c 0.6 Di-trimethylol propane c 0.7 Calciun stearate a 0.8 Zinc stearate 0.8 Calciun oxide, coated with 2% by weight hydroxystearic d 0.15 acid (relative to 100 parts by weight Cao) Mixture of internal and external lubricants with the f 0.75 joint use of rnontan waxes Hard paraffin f 0.2 Partly oxidised hard paraffin f 0.1 Example 4 Group Parts by weight parts by weight suspension vinyl chloride homopolymer (K value 64) and 20 parts by weight vinyl chloride/ethylene/vinyl acetate graft copolymer (with a content of 10% by weight EVA) Polymethyl methacrylate (PMHA) Precipitated calcium carbonate having a particle size of<0J;m Titaniun dioxide Benzoylstearoyl methane ,4-dihydropyridine Diphenyldecyl phosphite Calciun stearate Zinc stearate calcined dolomite (micronised) having a particle size of < 1 um, coated with 2% by weight hydroxystearic acid (relative to 100 parts by weight calcined dolomite) Mixture of internal and external lubricants with the joint use of montan waxes Hard paraffin Partly oxidised hard paraffin Finely divided sodiun bicarbonate Azodicarbonamide Antimony trioxide Aluminium hydroxide O-|—IOOOl'\J u-a [UNIV-'-' Groups: I-'-D'kQl'h(DQ-GU‘!!! \_J. = calcium carboxylate = zinc carboxylate = co-stabilisers = alkaline earth oxide = filler = lubricants = processing aids = pigments = expanding agents = flame retardants

Claims (9)

    Claims
  1. A plasticiser-free moulding compound on the basis of polyvinyl chloride, containing a plastics material and, consisting of vinyl chloride homopolymer, copolymer, terpolymer, mixtures thereof or compounds therewith, having a VC or PVC content of more than 70% by weight, preferably more than 85% by weight, relative to the plastics material, and O to 15% by weight, relative to the plastics material, of an impact-modifying polymer, selected from the group of polyalkyl acrylates, chlorinated polyethylenes, ethylene/vinyl acetate copolymers or ethylene/vinyl acetate/carbon monoxide terpolymers, per 100 parts by weight of this plastics material, 0.01 to 3 parts by weight of at least one calcium carboxylate, 0.01 to 3 parts by weight of at least one zinc carboxylate, 0.01 to 3 parts by weight of at least one organic co—stabiliser, selected from the group of at least one 3-diketone, organic phosphite and/or dihydro— pyridine, and optionally pigments, dyes, lubricants, blowing agents, flame retardants, fillers, reinforcing fibres or other processing aids and additives, characterised in that 18 d) 0.01 to 5 parts by weight of at least one alkaline earth oxide, alkaline earth hydroxide and/or partly hydrated alkaline earth oxide, preferably calcium oxide and/or magnesium oxide, and/or partly hydrated calcium oxide and/or partly hydrated magnesium oxide and/or calcined dolomite or partly hydrated calcined dolomite, with the alkaline earth oxide, alkaline earth hydroxide and/or partly hydrated alkaline earth oxide, preferably the calcium oxide and/or magnesium oxide, and/or the partly hydrated calcium oxide and/or partly hydrated magnesium oxide and/or the calcined dolomite being coated on the entire surface or in partial regions of the surface with a surface-modifying treatment agent or coating agent, are contained in the plasticiser—free moulding compound.
  2. 2. A plasticiser—free moulding compound according to Claim 1, characterised in that it contains 0.01 to 15 parts by weight filler, preferably inorganic filler.
  3. 3. A plasticiser—free moulding compound according to Claim 1 and 2, characterised in that the filler or the filler mixture or a portion of the filler or of the filler mixture is coated on its surface completely or in partial regions with a surface-modifying treatment agent or coating agent.
  4. 4. A plasticiser—free moulding compound according to Claims 1 to 3, characterised in that the surface- modifying treatment agent or coating agent is a saturated or unsaturated fatty acid or esters, salts or derivatives thereof, which additionally contains at 19 least one OH group or at least one other polar group in addition to the COOH, ester and/or COO group.
  5. 5. A plasticiser-free moulding compound according to Claims 1 to 4, characterised in that the vinyl chloride homopolymer, copolymer and/or terpolymer contained in the moulding compound has an average K value of 58 to 73, preferably 64 to 71.
  6. 6. A method for preparing a plasticiser-free moulding compound according to Claims 1 to 5, characterised in that the plastics material(s) and the other additives are mixed in a hot mixer at temperatures above 35°C and are heated with a temperature increase to temperatures between 100 and 125°C (calculated as compound temperature), preferably 110 to 120°C, and then the moulding compound is cooled in a cooling mixer to temperatures below 40°C, preferably below 35°C.
  7. 7. A method according to Claim 6, characterised in that the plastics material and the solid mixture constituents (with the exception of T102) are pre-mixed at 35 to 50°C, preferably at 37 to 45°C, and the liquid additives are admixed after a temperature increase to 55 to 65°C, preferably at 57 to 62°C.
  8. 8. A method according to Claims 6 and 7, characterised in that the addition of T102 to the plastics material/additive mixture pre—mixed in the hot mixer is effected at temperatures of 90 to 125°C, preferably 110 to 120°C.
  9. 9. The use of a plasticiser-free moulding compound according to Claims 1 to 5 in extrusion or injection- moulding processes for the production of profiles or articles, preferably window profiles or extruded tubes. F. R. KELLY & CO., AGENTS FOR THE APPLICANTS.
IE304590A 1989-08-23 1990-08-22 Unplasticized polyvinyl-chloride-based moulding compound,¹process for its production and use IE903045A1 (en)

Applications Claiming Priority (2)

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DEGERMANY23/08/1989P3927777.1
DE3927777A DE3927777A1 (en) 1989-08-23 1989-08-23 SOFTENER-FREE MOLDING MATERIAL BASED ON POLYVINYL CHLORIDE, METHOD FOR THE PRODUCTION AND USE THEREOF

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IE83257B1 true IE83257B1 (en)
IE903045A1 IE903045A1 (en) 1991-02-27

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US (1) US5124373A (en)
EP (1) EP0422335B1 (en)
AT (1) ATE142238T1 (en)
BR (1) BR9004155A (en)
CA (1) CA2023155C (en)
DD (1) DD297176A5 (en)
DE (2) DE3927777A1 (en)
DK (1) DK0422335T3 (en)
ES (1) ES2093620T3 (en)
GR (1) GR3021266T3 (en)
HU (1) HU210749B (en)
IE (1) IE903045A1 (en)
NO (1) NO305129B1 (en)
PT (1) PT95075B (en)

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