ITTV970085A1 - Manufatto composto da polistirene espanso e/o polipropilene espanso amalgamato/i da schiuma di poliuretano. - Google Patents

Manufatto composto da polistirene espanso e/o polipropilene espanso amalgamato/i da schiuma di poliuretano. Download PDF

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Publication number
ITTV970085A1
ITTV970085A1 IT97TV000085A ITTV970085A ITTV970085A1 IT TV970085 A1 ITTV970085 A1 IT TV970085A1 IT 97TV000085 A IT97TV000085 A IT 97TV000085A IT TV970085 A ITTV970085 A IT TV970085A IT TV970085 A1 ITTV970085 A1 IT TV970085A1
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IT
Italy
Prior art keywords
polyurethane foam
expanded
polypropylene
expanded polystyrene
artifact
Prior art date
Application number
IT97TV000085A
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English (en)
Inventor
Roberto Monaci
Original Assignee
Roberto Monaci
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 Roberto Monaci filed Critical Roberto Monaci
Publication of ITTV970085A0 publication Critical patent/ITTV970085A0/it
Priority to IT97TV000085A priority Critical patent/IT1293376B1/it
Priority to US09/100,349 priority patent/US6326077B1/en
Priority to ES98111366T priority patent/ES2242250T3/es
Priority to EP98111366A priority patent/EP0887371B1/en
Priority to PT98111366T priority patent/PT887371E/pt
Priority to DE69830447T priority patent/DE69830447T2/de
Priority to EP05006224A priority patent/EP1555298A1/en
Priority to CA002241657A priority patent/CA2241657A1/en
Publication of ITTV970085A1 publication Critical patent/ITTV970085A1/it
Application granted granted Critical
Publication of IT1293376B1 publication Critical patent/IT1293376B1/it
Priority to US09/972,716 priority patent/US6635203B2/en
Priority to US10/630,669 priority patent/US7300698B2/en

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    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/35—Composite foams, i.e. continuous macromolecular foams containing discontinuous cellular particles or fragments
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/10—Linings
    • A42B3/12—Cushioning devices
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42C—MANUFACTURING OR TRIMMING HEAD COVERINGS, e.g. HATS
    • A42C2/00—Manufacturing helmets by processes not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
    • 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
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/37—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers of foam-like material, i.e. microcellular material, e.g. sponge rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • B29C67/207—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising impregnating expanded particles or fragments with a binder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/04—External Ornamental or guard strips; Ornamental inscriptive devices thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2270/00—Compositions for creating interpenetrating networks
    • 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
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • 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
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • 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
    • C08J2425/00—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 aromatic carbocyclic ring; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—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 aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
    • C08L71/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
    • C08L71/12—Polyphenylene oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/909—Resilient layer, e.g. printer's blanket
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S521/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S521/904—Polyurethane cellular product having high resiliency or cold cure property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249978—Voids specified as micro
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249981—Plural void-containing components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249982—With component specified as adhesive or bonding agent
    • Y10T428/249985—Composition of adhesive or bonding component specified

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

DESCRIZIONE DELL’INVENZIONE INDUSTRIALE.
Avente per titolo:
MANUFATTO COMPOSTO DA POLISTIRENE ESPANSO E/O POLIPROPILENE ESPANSO AMALGAMATO/I DA SCHIUMA DI POLIURETANO.
Lo stato dell’arte attuale è quello di produrre manufatti prevalentemente monomateriale cioè polistirene espanso, polipropilene espanso e schiuma di poliuretano.
Per il polistirene espanso ed il polipropilene espanso dopo il riempimento dello stampo con la materia prima, avente l’aspetto di perle o sfere, l’immissione di vapore d’acqua determina la sinterizzazione (unione) delle perle con il conseguente riempimento dei volumi liberi iniziali esistenti tra le perle medesime .
Quanto sopra determina la definizione geometrica manufatto e la sua resistenza meccanica.
Per il poliuretano il riempimento dello stampo avviene con la schiuma del poliuretano medesimo immessa nello insieme ad opportuni agenti catalizzatori che, in molto brevi,, ne deterrraminano la definizione geometrica e sua resistenza meccanica
DESCRIZIONE DELL’INVENZIONE:
Lo stampo viene riempito con perle di polistirene e/o polipropilene, i volumi liberi esistenti tra le perle vengono successivamente occupati dalla schiuma di poliuretano;
oppure, contemporaneamente alla schiuma di poliuretano, giungono all’interno dello stampo le perle di polistirene e/o di polipropilene espansi.
Si utilizza così la schiuma di poliuretano come agente cementante delle perle di polistirene e/o polipropilene espansi; la struttura che ne deriva conferisce ai manufatti caratteristiche completamente diverse da quelle sinora ottenute con le singole materie prime.
Variabili quali densità delle materie prime utilizzate o sovrapposizioni di spessori di entità variabile come misura e anche come densità, permettono l’ottimizzazione delle caratteristiche fisiche e meccaniche dei manufatti.
Con il processo oggetto della presente rivendicazione le caratteristiche meccaniche delle perle, di polistirene in modo particolare, rimangono integre quindi capaci di conferire ai manufatti elevati livelli di assorbimento di energia d’urto.
N·Β·
Nel processo e nel manufatto oggetto della
rivendicazione si parla di polistirene e polipropilene espansi ma, con tali termini, si includono anche possibili loro derivati; trattasi di coopolimeri a prevalente contenuto stirenico e/o propilenico legati cioè con altri polimeri.

Claims (5)

  1. RIVENDICAZIONI 1) Manufatti costituiti da perle di polistirene espanso amalgamate da schiuma di poliuretano.
  2. 2 ) Manufatti costituiti da perle di polipropilene espanso amalgamate da schiuma di poliuretano.
  3. 3) Manufatti costituiti da -perle di polistirene espanso e polipropilene amalgamate da schiuma di poliuretano.
  4. 4) Manufatti specifici quali caschi protettivi per ciclo, moto, auto e lavoro prodotti con la tecnologia ed i costituenti rivendicata ai precedenti punti 1) 2) 3)).
  5. 5) Manufatti specifici quali parti protettive interne di veicoli in genere e di paraurti prodotti con la tecnologia ed i costituenti rivendicata ai precedenti punti 1) 2) 3)).
IT97TV000085A 1997-06-25 1997-06-25 Manufatto composto da polistirene espanso e/o polipropilene espanso amalgamato/i da schiuma di poliuretano. IT1293376B1 (it)

Priority Applications (10)

Application Number Priority Date Filing Date Title
IT97TV000085A IT1293376B1 (it) 1997-06-25 1997-06-25 Manufatto composto da polistirene espanso e/o polipropilene espanso amalgamato/i da schiuma di poliuretano.
PT98111366T PT887371E (pt) 1997-06-25 1998-06-19 Material polimerico composito com elevada resistencia a energia de impacto
ES98111366T ES2242250T3 (es) 1997-06-25 1998-06-19 Proceso para preparar materiales polimericos compuestos que tienen gran resistencia a energia de impacto.
EP98111366A EP0887371B1 (en) 1997-06-25 1998-06-19 Process for preparing composite polymeric materials having high resistance to impact energy
US09/100,349 US6326077B1 (en) 1997-06-25 1998-06-19 Composite polymeric material having high resistance to impact energy
DE69830447T DE69830447T2 (de) 1997-06-25 1998-06-19 Methode zur Herstellung von Komposit-Polymermaterialien, die hohe Festigkeit gegenüber Schlagenergie aufweisen
EP05006224A EP1555298A1 (en) 1997-06-25 1998-06-19 Composite polymeric material having high resistance to impact energy
CA002241657A CA2241657A1 (en) 1997-06-25 1998-06-23 Composite polymeric material having high resistance to impact energy
US09/972,716 US6635203B2 (en) 1997-06-25 2001-10-09 Composite polymeric material having high resistance to impact energy
US10/630,669 US7300698B2 (en) 1997-06-25 2003-07-31 Composite polymeric material having high resistance to impact energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT97TV000085A IT1293376B1 (it) 1997-06-25 1997-06-25 Manufatto composto da polistirene espanso e/o polipropilene espanso amalgamato/i da schiuma di poliuretano.

Publications (3)

Publication Number Publication Date
ITTV970085A0 ITTV970085A0 (it) 1997-06-25
ITTV970085A1 true ITTV970085A1 (it) 1998-12-25
IT1293376B1 IT1293376B1 (it) 1999-02-25

Family

ID=11420197

Family Applications (1)

Application Number Title Priority Date Filing Date
IT97TV000085A IT1293376B1 (it) 1997-06-25 1997-06-25 Manufatto composto da polistirene espanso e/o polipropilene espanso amalgamato/i da schiuma di poliuretano.

Country Status (7)

Country Link
US (1) US6326077B1 (it)
EP (2) EP1555298A1 (it)
CA (1) CA2241657A1 (it)
DE (1) DE69830447T2 (it)
ES (1) ES2242250T3 (it)
IT (1) IT1293376B1 (it)
PT (1) PT887371E (it)

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US7300698B2 (en) * 1997-06-25 2007-11-27 Roberto Monaci Composite polymeric material having high resistance to impact energy
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WO2013182074A1 (zh) * 2012-06-08 2013-12-12 中国石油化工股份有限公司 酚醛树脂组合物、由其制备的发泡材料及其制备方法和由其制备的成型材料
US9894953B2 (en) 2012-10-04 2018-02-20 Intellectual Property Holdings, Llc Helmet retention system
US10138373B2 (en) 2013-09-04 2018-11-27 Virfex, LLC Flexible polyurethane and polyurethane/polyorganosiloxane foam materials that absorb impact energy
US10414921B1 (en) 2013-09-04 2019-09-17 Virfex, LLC Polyurethane foam based ballistic armor
USD733972S1 (en) 2013-09-12 2015-07-07 Intellectual Property Holdings, Llc Helmet
AU2014342635B2 (en) 2013-10-28 2019-07-11 Team Wendy, Llc Helmet retention system
EP2987820A1 (en) 2014-08-20 2016-02-24 VEDAG GmbH Bitumen composition comprising partially degraded waste rubber material
USD793625S1 (en) 2014-10-23 2017-08-01 Intellectual Property Holdings, Llc Helmet

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GB9504028D0 (en) 1995-02-28 1995-04-19 Kovacs Laszlo Additive to expanded foam
US5699561A (en) * 1996-06-28 1997-12-23 Troxel West Self-contained bicycle helmet and molding process therefor

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IT1293376B1 (it) 1999-02-25
DE69830447D1 (de) 2005-07-14
ITTV970085A0 (it) 1997-06-25
EP1555298A1 (en) 2005-07-20
PT887371E (pt) 2005-10-31
DE69830447T2 (de) 2005-10-20
ES2242250T3 (es) 2005-11-01
EP0887371A1 (en) 1998-12-30
EP0887371B1 (en) 2005-06-08
CA2241657A1 (en) 1998-12-25
US6326077B1 (en) 2001-12-04

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