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WO2008067350A2 - Mélanges de résines élastomères thermoplastiques et utilisations de ceux-ci dans un article - Google Patents

Mélanges de résines élastomères thermoplastiques et utilisations de ceux-ci dans un article Download PDF

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Publication number
WO2008067350A2
WO2008067350A2 PCT/US2007/085708 US2007085708W WO2008067350A2 WO 2008067350 A2 WO2008067350 A2 WO 2008067350A2 US 2007085708 W US2007085708 W US 2007085708W WO 2008067350 A2 WO2008067350 A2 WO 2008067350A2
Authority
WO
WIPO (PCT)
Prior art keywords
weight
parts
polymer blend
mixture
ethylene
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.)
Ceased
Application number
PCT/US2007/085708
Other languages
English (en)
Other versions
WO2008067350A3 (fr
Inventor
Michael Hansen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mack Molding Co Inc
Original Assignee
Mack Molding Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mack Molding Co Inc filed Critical Mack Molding Co Inc
Publication of WO2008067350A2 publication Critical patent/WO2008067350A2/fr
Publication of WO2008067350A3 publication Critical patent/WO2008067350A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
    • C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
    • 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
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
    • C08L23/0853—Ethene vinyl acetate copolymers
    • 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
    • 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
    • C08L23/14—Copolymers of propene
    • C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other olefins

Definitions

  • the invention relates to thermoplastic elastomer resin blends for use in applications typically requiring (poly)vinylchloride (PVC) based compositions.
  • PVC polyvinylchloride
  • PVC resins have been widely used in applications such as floor and cargo mats for the automobile/truck market, and the like.
  • PVC resins have a number of drawbacks. One is the difficulty of recycling articles containing them.
  • a second drawback is the generation of unfriendly compounds, from a phenomenon referred to as fogging, and the generation of irritating and distinct odors.
  • PVC also has a high specific density compared with other thermoplastic resins, which makes manufactured parts having PVC as the main component heavier. PVC resin is not considered environmentally friendly and industry efforts are being made to find substitute resins that meet stringent industry testing requirements.
  • thermoplastic elastomer resin compositions/blends that overcome at least one of the aforementioned deficiencies.
  • An aspect of the present invention relates to a polymer blend produced by the process of: admixing 70 to 90 parts by weight of a thermoplastic olefin copolymer; 2 to 14 parts by weight of a polypropylene elastomer; 2 to 9 parts by weight of a polyolefin elastomer; and 2 to 16 parts by weight of an ethylene-vinyl acetate copolymer to form a mixture; and heating said mixture to form a polymer blend.
  • a second aspect of the present invention relates to a polymer blend produced by the process of: admixing 75 to 80 parts by weight of a thermoplastic olefin copolymer; 2 to 5 parts by weight of a polypropylene elastomer; 7 to 9 parts by weight of a polyolefin elastomer; and 6 to 10 parts by weight of an ethylene-vinyl acetate copolymer to form a mixture; and heating said mixture to form a polymer blend.
  • a third aspect of the present invention relates to a molded part produced by the process of: admixing 70 to 90 parts by weight of a thermoplastic olefin copolymer; 2 to 14 parts by weight of a polypropylene elastomer; 2 to 9 parts by weight of a polyolefin elastomer; and 2 to 16 parts by weight of an ethylene-vinyl acetate copolymer to form a mixture; and heating said mixture to form a heated polymer blend; injecting the said heated polymer blend into a mold; and cooling said heated polymer blend in said mold resulting in the formation of a molded part.
  • thermoplastic olefin copolymer is a polypropylene-ethylene copolymer.
  • polyolefin elastomer is ethylene-octene copolymer, ethylene-butene copolymer, and the like.
  • the polymer blend was prepared by independently admixing a preselected thermoplastic olefin copolymer, a polypropylene elastomer; a polyolefm elastomer, and an ethylene-vinyl acetate copolymer listed above to form a polymeric blend containing the aforementioned copolymers and elastomers.
  • the polymer blend of the present invention may additionally comprise polypropylene, polyethylene, and combinations thereof as a component.
  • the additional component comprising the aforementioned may be present from about 2 part by weight to about 30 parts by weight.
  • the polymer blend of the present invention may additionally comprise one or more of a filler, a colorant, a surface active agent, or a blowing agent.
  • the total combined amount of the aforementioned components present in the polymer blend typically is from about 1 to about 20 parts by weight in an embodiment of the present invention.
  • filler examples include but are not limited to talc, chalk, glass fibers or glass beads, and the like.
  • An example of a colorant or dye that may be used includes but is not limited to black colorant.
  • Examples of a surface active agent that may be used in embodiment of the present invention include but are not limited to fire resistant ingredients, UV stabilizers, and the like.
  • Examples of a blowing agent that may be used in embodiment of the present invention include but are not limited to chemical blowing agents and the like.
  • the elastomers and copolymers employed in the present invention were used as purchased unless otherwise noted. [0016] The elastomers and copolymers were mixed in Conair Auto weight GB Gravimetric batch blender that was set up to allow the blending of 2 components at one time.
  • the weight of the final product (a molded mat) is 1 , 111.0 g. AU component percentages are of the weight of the molded mat.
  • Ethylene-vinyl acetate copolymer (sold as AmplifyTM) and ethylene-octene copolymer (sold as Engage ® ) are first mixed together.
  • a feeding system for the gravimetric blender separately draws the ethylene-vinyl acetate copolymer and the ethylene-octene copolymer out of a box and feeds the resins pneumatically into a hopper unit for each of the components to be mixed.
  • the hopper is located above the blender mixing chamber. The hopper weighs and releases the appropriate amount of each component into the mixing chamber.
  • the ethylene-vinyl acetate copolymer (7.1%) and the ethylene-octene copolymer (7.1%) are released into the mixing chamber and mixed with rotating mixing elements into a homogeneous mixture.
  • the mixture containing the 2 components (referred to as mixture 1) is released from the mixing chamber into a box underneath.
  • Step 2 [0020] Mixture 1 is mixed with the polypropylene elastomer (14.1%), sold as Sarlink ® .
  • the mixing process follows the same sequence as described in step 1.
  • Mixture 1 and the polypropylene elastomer were placed in separate hoppers.
  • One half of mixture 1 and one half of the polypropylene elastomer present in the hoppers were mixed as described above and released after mixing into a box underneath the mixing chamber.
  • the mixture comprising blend 1 and the polypropylene elastomer is referred to as mixture 2.
  • Mixture 2 was then mixed with the polypropylene-ethylene copolymer (sold as VersifyTM). Mixture 2 (29%) and the polypropylene-ethylene copolymer (71%) were mixed in the same manner as described in step 1 and released into a box underneath the mixing chamber.
  • the mixture comprising mixture 2 and the polypropylene-ethylene copolymer is referred to as mixture 3.
  • Mixture 3 then was processed by a 1987 HPM 500 ton injection molding press with 110 oz press.
  • Mixture 3 was pneumatically conveyed into a hopper located on top of a throat of the injection molding press.
  • a black colorant (1.5%) was added to mixture 3 using an auger feeder.
  • the feeder metered a pre-set amount of colorant into mixture 3, while blend 3 was gravity fed via the throat into the feeding section of the barrel of the injection molding press.
  • Mixture 3 and the black colorant then were conveyed by a rotating screw through the press.
  • the mixture 3 and the black colorant were heated by shear mixing forces and barrel heating zones, while the pellets were being conveyed towards to tip of the injection molding barrel and melted.
  • the temperature of the barrel heating zones was in a range from about 370 0 C to about 425 0 C.
  • the process of heating and melting the pellets, the copolymers and elastomers of the mixture were dispersed evenly throughout forming a polymer blend having the component copolymers and elastomers distributed homogenously.
  • a shot of the heated polymer blend is injected into a molded cavity in the shape of a floor mat.
  • a hold phase is applied after injection. The hold phase is used to push additional heated polymer blend into the cavity in order to compensate for shrinkage of the heated polymer blend during solidification.
  • the heated polymer blend is cooled in the molded cavity to form a molded part.
  • the molded part is held in the tool and cooled down to a point where the part is solidified enough to be ejected from the cavity. Once the cooling phase is completed the tool opens and the molded part is ejected. After removal of the part, the next cycle starts with the injection of another metered shot and the completion of the holding and cooling phases described above.
  • the part weight for a molded mat is 1,111 g .
  • Abrasion resistance No hole in sample plaque after the abrasion test.
  • VOC emission test no cancerous listed substances identified.
  • Shore hardness is a measure of the resistance of material to indentation. The higher the number, the greater the resistance. The hardness testing of plastics is most commonly measured by the Shore (Durometer) test or Rockwell hardness test. Both methods measure the resistance of the plastic toward indentation and both provide an empirical hardness value that does not correlate to other properties or fundamental characteristics. Shore Hardness, using either the Shore A or Shore D scale, is the preferred method for rubbers/elastomers and is also commonly used for "softer" plastics such as polyolefins, fluoropolymers, and vinyls.
  • the Shore A hardness is the relative hardness of elastic materials such as rubber and soft plastics and can be determined with an instrument called a Shore A durometer. If the indenter completely penetrates the sample, a reading 0 is obtained, and if no penetration occurs, a reading of 100 results. The reading is unitless.
  • Table I contains Shore A Hardness measurements for 10 different test samples each comprising solely of one blend or a second blend.
  • One blend is a polymer blend produced by the process of the present invention.
  • the second blend is a typical blend using soft-(poly)vinylchloride as the main component of the mat.
  • the car mat comprising the polymer blend of the present invention continued to show exemplary Shore A Hardness characteristics in comparison to the car mat using the K soft-PVC polymer.
  • Another unexpected advantage of polymer blends and articles produced by the processes of the present invention is the decrease in density.
  • the molded car mat having the K soft-PVC polymer weights 1,735 g while the car mat of the present invention weighs 1,111 g., 64 % of the weight of the aforementioned car mat.
  • the density reduction is 36% as compared to the K soft-PVC car mat.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne des compositions de résines élastomères thermoplastiques à utiliser dans des applications qui nécessitent typiquement des compositions à base de poly(chlorure de vinyle) (PVC).
PCT/US2007/085708 2006-11-29 2007-11-28 Mélanges de résines élastomères thermoplastiques et utilisations de ceux-ci dans un article Ceased WO2008067350A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86773506P 2006-11-29 2006-11-29
US60/867,735 2006-11-29

Publications (2)

Publication Number Publication Date
WO2008067350A2 true WO2008067350A2 (fr) 2008-06-05
WO2008067350A3 WO2008067350A3 (fr) 2008-07-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/085708 Ceased WO2008067350A2 (fr) 2006-11-29 2007-11-28 Mélanges de résines élastomères thermoplastiques et utilisations de ceux-ci dans un article

Country Status (1)

Country Link
WO (1) WO2008067350A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8573677B2 (en) 2010-09-13 2013-11-05 Josef Dirnfeld Floor mat and method for manufacturing a floor mat
CN107698876A (zh) * 2017-09-26 2018-02-16 武汉金发科技有限公司 一种改性聚丙烯用voc萃取剂及其制备方法和应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4863995A (en) * 1987-07-16 1989-09-05 Showa Denko Kabushiki Kaisha Propylene polymer composition
GB2361485A (en) * 2000-03-17 2001-10-24 Ruberoid Building Products Ltd Membrane for use in building
ES2240585T3 (es) * 2002-02-04 2005-10-16 Borealis Gmbh Peliculas de capas multiples.
CA2520393C (fr) * 2003-03-28 2012-05-08 Dow Global Technologies Inc. Structure de revetement de sol thermoformable peu brillant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8573677B2 (en) 2010-09-13 2013-11-05 Josef Dirnfeld Floor mat and method for manufacturing a floor mat
CN107698876A (zh) * 2017-09-26 2018-02-16 武汉金发科技有限公司 一种改性聚丙烯用voc萃取剂及其制备方法和应用

Also Published As

Publication number Publication date
WO2008067350A3 (fr) 2008-07-17

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