Classifications

• • 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
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J129/00—Adhesives based on 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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
  • C09J129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
  • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
  • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
  • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
  • B32B5/022—Non-woven fabric
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
  • B32B5/024—Woven fabric
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • 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
  • C08K5/07—Aldehydes; Ketones
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L29/00—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 an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
  • C08L29/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
  • B32B2264/10—Inorganic particles
  • B32B2264/102—Oxide or hydroxide
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/732—Dimensional properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2605/00—Vehicles
  • B32B2605/08—Cars
• • 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
  • C08J2329/00—Characterised by the use 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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
  • C08J2329/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
• • 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
  • C08K2201/00—Specific properties of additives
  • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
• • 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
  • C08K2201/00—Specific properties of additives
  • C08K2201/019—Specific properties of additives the composition being defined by the absence of a certain additive
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J129/00—Adhesives based on 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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
  • C09J129/02—Homopolymers or copolymers of unsaturated alcohols
  • C09J129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids

Definitions

• Thin films comprising plasticizer-free polyvinyl-co-acetal Description
• Films comprising polyvinyl acetal are long known as adhesive layer for laminating glass, polymers or fibers. Especially plasticized polyvinyl acetal films are widely used as adhesive layer for glass-glass laminates in automotive use.
• Such films contain usually between 15 and 30 % of plasticizer.
• plasticized films are unsuitable, since plasticizer migrates into polycarbonate which detours mechanical instability and optical properties of the polycarbonate sheet.
• Plasticizer-free films from polyvinyl acetal are knows as adhesive layer for non-woven fabrics.
• WO 2013124147A1 discloses the use of plasticizer-free films containing polyvinyl butyral (PVB) for laminating layers of aromatic polyamide fibers.
• films containing polyvinyl butyral have a rather low softening temperature.
• long cooling is necessary to fix the desired shape of the laminate and/or to prevent delamination.
• films based on polyvinyl-co- acetals are suitable as adhesive layer and poses higher softening temperatures as the respective homo-polyvinylacetals
• Object of the invention is therefore a Film comprising polyvinyl-co-acetal characterized in a thickness of 1 ym to 1000 ym, less than 10 whgt% of at least one plasticizer wherein the polyvinyl-co-acetal is obtained by reacting at least one polyvinyl alcohol with at least two different aliphatic keto compounds each containing 1 to 10 carbon atoms.
• the film according to the invention may be obtained by reacting at least one polyvinyl alcohol with a first and a second aliphatic keto compounds wherein the first aliphatic keto compound has at least one carbon atom less that the second aliphatic keto compound.
• the polyvinyl-co- acetal is obtained by reacting at least one polyvinyl alcohol with a first and a second aliphatic keto compounds and the ratio of the groups of the polyvinyl-co-acetal originating from the first aliphatic keto compound and the second aliphatic keto compound between 20:80 and 50:50.
• the polyvinyl-co- acetal is obtained by reacting at least one polyvinyl alcohol with acetaldehyde as first aliphatic keto compound and (n) - and/or (iso) -butyraldehyde as second aliphatic keto compound.
• the film may have a thickness between 10 and 300 ym, preferably between 30 and 250 ym, more preferably between 40 and 110 ym.
• the polyvinyl-co-acetals used in this invention have a polyvinyl acetate content of 1 to 20 % by weight, particularly 1 to 10 % by weight and a polyvinyl alcohol content of 10 to 35 % by weight, preferably 11 to 27 % by weight and in particular 16 to 21% by weight.
• the degree of polymerization Pw of the polyvinyl-co-acetals is preferably between 100 and 1000, particularly preferably between 100 and 800 and in particular between 100 and 500.
• Suitable polyvinyl-co-acetals have a molecular weight sufficiently high to form self-supported films either by extrusion or by solvent casting process.
• the suitable molecular weight of the polyvinyl-co-acetals is expressed by the viscosity, ranging from 5 mPas to 3000 mPas, preferable between 5 mPas to 2500 mPas and in particular 5 to 2000 mPas, especially 20 to 200 mPas .
• the polyvinyl-co-acetals used in accordance with the invention it is preferred to use a mixture of acetaldehyde with n-butyraldehyde and/or iso-butyraldehyde for acetalisation .
• the proportion of acetal groups in the polyvinyl-co-acetal resulting from n-butyraldehyde and/or iso- butyraldehyde should be at least 50 mol %.
• the polyvinyl alcohol used to produce the polyvinyl-co-acetals can be utilized as one component or in the form of a mixture of polyvinyl alcohols having a different degree of polymerisation or degree of hydrolysis.
• the polyvinyl alcohol content of the polyvinyl-co-acetals may be 10 to 25 % by weight, preferably 18 to 23 % by weight.
• the film laminates or layers according to the invention are generally produced by extrusion or solvent casting.
• certain properties for example melt pressure, melt temperature and die temperature may be adjusted to obtain or avoid melt fracture i.e. to obtain or avoid a stochastic surface roughness.
• a film laminate according to the invention already produced can be embossed with a generally non- stochastic roughness by an embossing process between at least one pair of rolls.
• films according to the invention may be provided with surface structure, applied on one side or more preferably on both sides, with a roughness R z of 15 to 150 ym, preferably R z of 15 to 100 ym, more preferably R z of 20 to 80 ym, and in particular R z of 40 to 75 ym.
• films according to the invention have substantially no surface structure, like a roughness R z of 0 to 5 ym
• the polyvinyl-co-acetal film of the present invention is manufactured by extrusion for example with a blown film extrusion line, or preferably by a cast extrusion process using a flat film die and chill roll since then the shrinkage values are very low. Processing temperatures for the extrusion line are between 200 and 250 °C, preferably between 240 and 250 °C.
• the flat film die is heated between 250 and 280 °C, preferably between 260 and 275 °C.
• the polyvinyl acetal films may contain up to 2 wgt% preferable less than lwt % additives, especially less than 0.5 % wgt % additives .
• inorganic fillers such as pigments, dyes or clays, UV stabilizers, oxidation stabilizers or water may be employed .
• Suitable UV stabilizer may be amine based, for example tetramethyl piperidine.
• X HALS' products sterically hindered amines known as X HALS' products may be employed as co-stabilizer in connection with polynuclear phenolic compounds.
• Si0 2 optionally doped with AI 2 O 3 or Zr0 2 can be added.
• Films according to the invention may comprise up to 10% by weight plasticiser, for example one or more of the following plasticisers : water, di-2-ethylhexyl sebacate (DOS), di-2- ethylhexyl adipate (DOA) , dihexyl adipate (DHA) , dibutyl sebacate (DBS), triethylene glycol-bis-n heptanoate (3G7), tetraethylene glycol-bis-n-heptanoate (4G7), triethylene glycol-bis-2-ethyl hexanoate (3GO or 3G8), tetraethylene glycol-bis-n-2-ethyl hexanoate (4GO or 4G8), di-2-butoxyethyl adipate (DBEA) , di-2-butoxyethoxyethyl adipate (DBEEA) , di-2- butoxyethyl sebacate (DBES) , di-2
• films according to the invention comprise less than 5% by weight plasticiser, less than 2% by weight and most preferred no (0%) plasticizer.
• Film according to the invention can be used as hot melt, especially for fabrics.
• Two films of 50 ym thickness were prepared by solvent casting of two different polyvinyl acetals.
• Polyvinyl acetal A was prepared using only butyraldehyde
• polyvinyl acetal B was obtained by acetalisation of polyvinyl alcohol with a 50:50 mixture by weight of acetyldehyde and butyraldehyde.
• a fibre composite was prepared by stacking sheets of the polymer film and woven fabrics of Vectran 1670 dtex liquid crystal polymer fibre (available from Kuraray Europe GmbH, Hattersheim) with the following stacking scheme:
• the stack was pressed at 120 °C and 10 bar pressure in a heated press.
• the composite had to be cooled to 70 °C to be removed without distortions of the composite whereas composites based on polyvinyl acetal B had to be cooled only to 90°C.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Manufacturing & Machinery (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Materials Engineering (AREA)
• Textile Engineering (AREA)
• Manufacture Of Macromolecular Shaped Articles (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Laminated Bodies (AREA)
• Adhesives Or Adhesive Processes (AREA)

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• 2016
  • 2016-07-19 EP EP16180250.9A patent/EP3272792A1/en not_active Withdrawn
• 2017
  • 2017-07-05 EP EP17733876.1A patent/EP3487912B1/en active Active
  • 2017-07-05 KR KR1020197001803A patent/KR102180063B1/ko not_active Expired - Fee Related
  • 2017-07-05 JP JP2019502735A patent/JP6793811B2/ja not_active Expired - Fee Related
  • 2017-07-05 US US16/319,423 patent/US20190263984A1/en not_active Abandoned
  • 2017-07-05 WO PCT/EP2017/066719 patent/WO2018015149A1/en not_active Ceased
  • 2017-07-05 CN CN201780040191.6A patent/CN109312089A/zh active Pending

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