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  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
  • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
  • C08G63/60—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds
  • C08G63/605—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds the hydroxy and carboxylic groups being bound to aromatic rings
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  • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
  • C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
  • C08G63/688—Polyesters containing atoms other than carbon, hydrogen and oxygen containing sulfur
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  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
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  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/04—Homopolymers or copolymers of ethene
  • C08L23/06—Polyethene
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  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
  • C08L23/12—Polypropene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
• • 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
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/0016—Plasticisers
• • 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
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2207/00—Properties characterising the ingredient of the composition
  • C08L2207/06—Properties of polyethylene
  • C08L2207/066—LDPE (radical process)
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2312/00—Crosslinking
• • 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
  • C08L2666/14—Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
  • C08L2666/18—Polyesters or polycarbonates according to C08L67/00 - C08L69/00; Derivatives thereof

Definitions

• the present invention relates to polymer blends containing liquid crystalline polymers and isotropic polymers.
• the invention concerns novel substituted liquid crystalline polymers and their use as compatibilizer in such polymer blends.
• Blending Liquid Crystalline Polymers (LCP) with isotropic polymers is inherently a very difficult task because of the different basic nature of the two polymers: they are neither miscible nor compatible. Moreover, the interphacial adhesion between the LCP component and the isotropic polymer is poor, because the LCP is very inert and does not form entaglements with other polymers.
• the compatibility between the components of LCP/isotropic polymer blends can be improved by using compatibilizers and/or plasticizers.
• the end groups of the LCP hydroxyl, carboxyl, etc.
• some groups in the LCP-chain amide etc.
• the present invention aims at providing a novel type of compatibilizers for polymer blends containing an LCP component and an isotropic polymer component, such as a polyolefin.
• the invention is based on the concept of compatibilizing LCP/polyolefin blends by using substituted LCP's, which are partly compatible with the LCP-phase and partly compatible or reactive with the polyolefin phase.
• the compatibilizers used should not be too compatible with the LCP phase so that they interupt its morphology, but rather be located in the interphase.
• Thioalkyl substituted LCP's are examples of very suitable as compatibilizers in LCP/polyolefin blends.
• novel substituted LCP's according to the invention are characterized by what is stated in the characterizing part of claim 1.
• novel polymer blends according to the present invention contain 10 to 90 parts by weight of at least one LCP component and 90 to 10 parts by weight of at least one isotropic polymer component and 0.1 to 20 % by weight of a substituted LCP which is partly compatible with the LCP-phase and partly compatible or reactive with the isotropic polymer phase.
• the polymer blends are characterized by what is stated in the charactering part of claim 15.
• isotropic polymer designates any thermoplastic polymer which does not decompose below its melting point and which therefore can be melt processed.
• ком ⁇ онент means a substance which promotes the compatibility of the isotropic and anisotropic components of the compounds.
• the present new family of compatibilizers for LCP blends comprises substituted LCP's.
• these can be used as such or in combination with other compatibilizers and/or plasticizers to improve the degree of dispersion of one of the polymer components and increase the interphacial adhesion and hence the rheological and mechanical properties of these LCP-blends.
• compatibilizers and/or plasticizers can be used as such or in combination with other compatibilizers and/or plasticizers to improve the degree of dispersion of one of the polymer components and increase the interphacial adhesion and hence the rheological and mechanical properties of these LCP-blends.
• thioalkyl-substituted LCP's are good compatibilizers because these can form radicals by themselves or under influence of a radical-forming agent like sulfur. The radicals can then form bondings with the isotropic polymer and further improve the interphacial adhesion.
• these compatibilizers are not too compatible with the LCP phase so that they interupt its morphology but one located at the interphase.
• the substituents can be hydrocarbons as well as
• the LCP's are thermotropic mainchain LCP's, which are compatible with polyolefins and thermotropic mainchain LCP's.
• the substituent is a hydrocarbon and the substitution is made via a hetero atom.
• the heteroatom can be sulphur. It is preferred to use substituents, some or all of which are able to form radicals or react with radicals. As explained below in more detail, the substituents can be attached to monomers before polymerization. Monosubstituted monomers are particularly advantageous and thioalkyls and thioaikylaryls are preferred substitutents.
• the monomer components of the novel substituted LCP's are preferably selected from the group consisting of substituted diacids, substituted hydroxyacids, substituted dialcohols, substituted diamines, substituted aminoacids and substituted aminoalcohols.
• the monomers can be selected from the group consisting of thioalkyl substituted hydroquinone, thioalkyl substituted terephtalic acid, thioalkylaryl substituted hydroquinone and thioalkylaryl substituted terephtalic acid.
• the thioalkyl substituents preferably comprise an alkyl chain comprising 6 to 30 carbon atoms, in particular at least 8 carbon atoms. Particularly preferred embodiments are exemplified by thiododecyl and thiohexadecyl.
• the thioalkylaryl substituents comprise preferably a lower alkyl group having 1 to 6, in particular 1 to 4 carbon atoms (methyl and ethyl being preferred) and an aromatic residue, in particular a phenyl or phenylene residue. Thiocresyl is an example of a typical thioalkylaryl group.
• the present LCP's can also contain unsubstituted monomers like diacids, hydroxyacids, dialcohols, diamines, aminoacids and aminoalcohols.
• unsubstituted monomers like diacids, hydroxyacids, dialcohols, diamines, aminoacids and aminoalcohols.
• unsubstituted monomers hydroxybenzoic acid and/or N-(4-carboxyphenyl) trimellitimide can be mentioned.
• alkyl chains of 12 carbons and 16 carbons are used but the invention is not limited to these.
• Disubstituted monomers of the kinds mentioned above are known from before but when using such monomer in the synthesis of polymers no liquid crystalline properties can be obtained and they would therefore not be compatible with LCP.
• substitution is done in one step from benzoquinone and a mercaptane.
• the other monomers used in the polymerization must be chosen so that liquid crystalline properties are obtained but the recipe should not be "too similar" to the LCP which will be used in the blend.
• Hydroxybenzoic acid is one choice to form LCP (compatibilizer A mentioned above is not an LCP and is therefore not working as a compatibilizer).
• N- (4,carboxyphenyl) trimellitimide is also a choice but neither of these nonsubstituted LCP monomers is necessary.
• Any kind of monomers forming polyester type, polyesterimide type, polyesteramide type, polyestercarbonate type or any other kind of LCP can be used.
• Such monomers can be diacids, hydroxyacids, dialcohols, diamines, aminoacids, aminoalcohols etc.
• Compatibilizer D mentioned above was, however too compatible with Neste's polyesteramide type LCP because of too similar chemical composition in the LCP and the compatibilizer.
• a radical forming agent to an LCP/polyolefin blend containing a thioalkyl substituted LCP or compatibilizer the interphacial adhesion improved. Even if only sulfur was used as a radical forming agent in the examples the invention is not limited to sulfur but any radical forming agent will have such an effect.
• Such substances are peroxides (e.g.
• the substituted LCP forms a "macroscope" with LCP, polyolefin and/or any other polymer in the blend improving the adhesion to other blending components like fillers, fibres etc. It is also possible to add radicals by using electron beam, alone or in combination with chain transfer agents or by any other physical and/or chemical method.
• the substituted LCP can also form radicals by itself.
• the substituted LCP increases the interphacial adhesion between LCP and polyolefin.
• the LCP component is present in an amount of 10 to 90 parts by weight
• the polyolefin (or other isotropic polymer component) likewise in an amount of 10 to 90 pans by weight
• the substituted LCP is added in amounts of 0.1 - 20 % by weight calculated from the weight of the other components of the composition.
• the present novel blends of LCP, polyolefin and a substituted LCP have improved melt flow properties, better impact properties and/or less anisotropy. It is possible to use them as barrier polymers having the LCP as the continuous phase, but it is equally possible to manufacture formed articles having the LCP component as the dispersed phase (reinforcement) of the blends.
• the substituted LCP forms a "macrosoap" with LCP, polyolefin and/or any other polymer in the blend improving the adhesion to other blending components like fillers, fibres etc.
• the present blends can also contain other compatibilizers and plasticizers which facilitate the blending of LCP and polyolefin.
• said other compatibilizers and plasticizers are preferably functional polymers, such as maleic anhydride or glycidyl functionalized polyolefins and styrenic elastomers, alone or in combination.
• substituted LCP forms a "macrosoap" with LCP, polyolefin and/or any other polymer in the blend improving the adhesion to other blending components like fillers, fibres etc.
• the liquid crystalline polymer of the polymer blend may, for instance, comprise an aromatic main chain anisotropic polymer, preferably an anisotropic polyester, poly (ester amide), poly (ester ether), poly (ester carbonate) or poly (ester imide). It can also comprise a copolymer of a polyester, such as a copolymer of poly(ethylene terephthalate) and hydroxy benzoic acid or a copolymer of hydroxynaphthoic acid and hydroxybenzoic acid.
• an aromatic main chain anisotropic polymer preferably an anisotropic polyester, poly (ester amide), poly (ester ether), poly (ester carbonate) or poly (ester imide). It can also comprise a copolymer of a polyester, such as a copolymer of poly(ethylene terephthalate) and hydroxy benzoic acid or a copolymer of hydroxynaphthoic acid and hydroxybenzoic acid.
• liquid crystalline polymer which is used in the present invention, can be defined as a polymer which is formed when the components of the following general formulas (or at least two of them) are reacted with each other: a dicarboxylic acid of formula I
• R,, R 2 , and R 3 each independently represents a bivalent aromatic hydrocarbon group, a group of formula R 4 -X-R 5 , wherein R, and R 5 represent a bivalent hydrocarbon group and X is an oxygen or a sulphur atom, a sulphonyl, carbonyl, alkylene, or ester group or X is a single bond, a xylylene group or a bivalent aliphatic hydrocarbon group.
• the liquid crystalline polymer can also comprise a homopolymer of a hydroxycarboxylic acid of formula IV
• the aromatic dicarboxyiic acids of formula I are selected from the group comprising terephthalic acid, isophthalic acid, 4,4'diphenyl-dicarboxylic acid, diphenyl ether-4, 4 '-dicarboxyiic acid, diphenylethane-3, 3' -dicarboxyiic acid, diphenylethane-4,4'-dicarboxylic acid, diphenyl ether-3,3' -dicarboxyiic acid, 4,4'-triphenyl-dicarboxylic acid, 2,6-naphthalenedicarboxylic acid, diphenoxyethane- 4, 4 '-dicarboxyiic acid, diphenoxybutane-4,4'-dicarboxylic acid, diphenoxyethane-3, 3 '-dicarboxyiic acid, and naphthalene— 1,6-dicarboxy lie acid.
• Said aromatic dicarboxyiic acids may be alkyl-, alkoxy-, or halogen-substituted.
• the substituted derivatives can be selected from the group comprising chloroterephthalic acid, dichloroterephthalic acid, bromoterephthalic acid, methylterephthalic acid, dimethy .terephthalic acid, ethylterephthalic acid, methoxyterephthalic acid, and ethoxyterephthalic acid
• the alicyclic dicarboxyiic acids of formula I can be selected from the group comprising trans- 1,4-cyclohexanedicarboxylic acid, cis-l,4-cyclo-hexanedicarboxylic acid, and 1 ,3-cyclohexanedicarboxylic acid.
• the alicyclic dicarboxyiic acids may also be substituted by one or more alkyl-, alkoxy-, or halogen-substituent(s).
• the substituted dicarboxyiic acid derivatives can be selected from the group comprising trans- l,4-(l-methyl)-cyclohexane-dicarboxy lie acid and trans- 1 ,4-(l-chloro)cyclohexane-dicarboxylic acid.
• the aromatic diols of formula II can be selected from the group comprising hydroquinone, resorcinol, 4,4'-dihydroxydiphenyl, 4-4'-dihydroxytriphenyl, 1,6-naphthalenediol, 2,6-naphalene-diol, 4,4'-dihydroxydiphenyl ether, 3 ,3 '-dihydroxydiphenyl, 1 , l-bis(4-hydroxyphenyl)-methane, bis(4-hydroxyphenoxy)- ethane, 2,2-bis(4-hydroxyphenyl)propane, and 3,3'-dihydroxy-diphenyl ether.
• diols may be substituted by one or more alkyl-, alkoxy-, or halogen substituent(s), which derivatives are exemplified by the following list: chlorohydroquinone, methylhydroqumone, l-butylhydroquinone, phenylhydroquinone, methoxyhydroquinone, phenoxy hydroquinone, 4-chlororesorcinol, and methylresorcinol.
• alkyl-, alkoxy-, or halogen substituent(s) which derivatives are exemplified by the following list: chlorohydroquinone, methylhydroqumone, l-butylhydroquinone, phenylhydroquinone, methoxyhydroquinone, phenoxy hydroquinone, 4-chlororesorcinol, and methylresorcinol.
• alicyclic diols of formula II include trans- and cis- 1 ,4-cyclohexanediols, trans- 1 ,4-cyclohexane-dimethanol, trans-1 ,3-cyclohexanediol, cis-l,2-cyclohexanediol, and trans- 1,3-cyclohexanedimethanol.
• trans- and cis- 1 ,4-cyclohexanediols trans- 1 ,4-cyclohexane-dimethanol
• trans-1 ,3-cyclohexanediol cis-l,2-cyclohexanediol
• trans- 1,3-cyclohexanedimethanol trans- 1,3-cyclohexanedimethanol.
• the corresponding alkyl-, alkoxy-, or halogen-substituted derivatives can be used, as well.
• the aliphatic diols of formula II can be straight-chained or branched and selected from the group comprising ethylene glycol, 1,3-propanediol, 1,4-butanediol, and neopentyl glycol.
• the aromatic hydroxycarboxylic acids of formula III are selected from the group comprising 4-hydroxybenzoic acid, 3-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, and 6-hydroxy-l-naphthoic acid. These compounds can be alkyl-, alkoxy-, or halogen- substituted.
• the substituted aromatic hydroxycarboxylic acid derivatives are preferably selected from the group comprising 3-methyl-4-hydroxybenzoic acid,
• the LCP's used in the multilayered structures according to the invention can comprise the corresponding polyester amides. It is also possible to use polymers having a main chain containing conjugated double bonds, the monomer units of said main chain being linked to unsubstituted or substituted side chains which, together with the main chain render the polymer liquid-crystal properties. Examples of such polymers are polytiophene, polyaniline, polyacetylene, polypyrrole and polyparaphenylene substituted with alkyl chains containing at least 8 carbon atoms.
• copolyesters of terephthalic acid, alkylhydroquinone, p-hydroxybenzoic acid and hydroxyalkylphenyl-alkanoic acids the alkyl-substituent of the hydroquinone preferably comprising a lower alkyl group such as propyl or (tertiary) butyl, the alkanoic acid preferably containing 3 to 8 carbon atoms, propanoic acid being particularly preferred, and blockcopolyesters of trimellithic imide-terminated poly(THF) or poly silicone, containing the imide group in para- or meta-position i.e.
• the molecular weight of the liquid crystal polymer used in the present invention depends on the character of the repeating units of the LCP. Usually, the molecular weight is in the range of about 1,000 to 300,000. If fully aromatic polyesters are used as LCP's, their molecular weight is typically in the range of about 2,000 to 200,000, preferably about 10,000 to 50,000.
• the isotropic polymer component of polymer blends and compounds containing the novel liquid crystalline polymers can comprise any suitable thermoplastic or thermosetting polymer material.
• thermoplastic polymers are employed as matrix polymers.
• the isotropic polymers can be selected from the group comprising polyolefins and copolymers of olefinic monomers, polyesters, polyamides, polyethers, polystyrene, polyvinylchloride, polyacrylics, e.g.
• poly-R-acrylate or poly-R- methacrylate wherein R is methyl, ethyl, butyl or a similar substituent, polycarbonates, polyketones (e.g. polyetheretherketone), polyetherimides and polyimides.
• Typical comonomers are vinyl acetate, butyl acrylate, methyl acrylate and ethyl acrylate.
• polyolefins such as polyethylene, polypropylene, polybutylene, polyisobutylene, poly(4- methyl-1-pentylene), including copolymers of ethylene and propylene (EPM, EPDM) and chlorinated (PVC) and chlorosulphonated polyethylenes.
• the isotropic polymer may also be comprised of the corresponding polyalkanes, which contain styrene (PS), acryl, vinyl and fiuoroethylene groups, and different polyesters, such as poly (ethylene terephthalate), poly(butylene terephthalate) and polycarbonate, polyamides and polyethers (e.g. poly(phenylene ether).
• Particularly preferred polymers are the polyolefins, polyesters and poly(phenylene ether).
• the molecular weights of the preferred isotropic thermoplastic polymers are usually in a range from about 5,000 to 50,000, preferably about 10,000 to 30,000.
• the flexural modulus (0.5-0.25 %) of the matrix polymer is preferably about 100 - 10.000 MPa, in particular about 500 - 5000 MPa.
• compatibilizers in combination with other compatibilization systems.
• functionalized polyolefins like ethylene, methylacrylate, glycidylmethacrylate and/or maleic anhydride grafted EBA (ethylene butylacrylate copolymer).
• Compatibilizers can be used in the polymer blends and compounds according to the invention.
• the compatibilizer can be functionalized or unfunctionalized.
• the functionalized compatibilizers typically contain functional groups such as carboxy, anhydride, epoxy, oxazolino, hydroxy, isocyanate, acylacetam and carbodiimide groups.
• the polymer residues of the compatibilizer can comprise co- and terpolymers, grafted polyolefins, grafted polystyrene and thermoplastic elastomers.
• the polar groups of polyolefinic copolymers are generally acrylic esters, functional acrylic acid groups, and maleic anhydride groups.
• the polar groups of the terpolymers can be maleic anhydride groups, hydroxyl groups and epoxy groups, of which the first-mentioned are particularly preferred.
• the styrene block copolymers can consist of polystyrene segments and flexible elastomer segments. Typical styrene block copolymers are SBS (styrene/butadie- ne/styrene-copolymer), SIS (styrene/isoprene/styrene-copolymer) and SEBS (styrene/ethylene butylene/styrene-copolymer) .
• the testing was done by measuring impact resistance according to the notched Charpy method (ISO 179 IA, ID).
• the testing bars were injection moulded: melt temperature 300°C; mould temperature 40°C; injection pressure 3 bar; after pressure 1.5 bar; cooling time 20 s.
• compatibilizer B is the best choice for Vectra B950 / LDPE-blends and compatibilizer A and D are not at all useful. From Example 5 can be seen that for Optimide ⁇ also compatibilizer B is useful even if compatibilizer D is better due to its similarity with Optimide ⁇ . Both are polyester-imides. Vectra A950 is not suitable for blending with LDPE.
• Compatibilizer B is also suitable in Vectra B950 / HDPE- and Vectra B950 / PP-blends which appears from Example 6.
• Example 8 the use of the double amount of thioalkyl-substituted LCP- compatibilizers does not have a significant improvement but a better choice is a combination with functional polyolefins (Lothader AX 8900 contains glycidyl groups and NCPE 0420 contains maleic anhydride groups).
• Example 9 demonstrates that also when LCP forms the continuous phase the compatibilization is improved by adding thioalkyl-substituted LCP-compatibilizers.

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• 1996
  • 1996-08-16 FI FI963233A patent/FI963233A/fi unknown
• 1997
  • 1997-08-18 WO PCT/FI1997/000482 patent/WO1998007533A1/en active Application Filing

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