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665800

Sigma-Aldrich

Polytétrafluoroéthylene preparation

Polytetrafluoroethylene preparation

60 wt % dispersion in H2O

Synonyme(s) :

Dispersion PTFE

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100 ML
88,30 €
500 ML
295,00 €

88,30 €

Disponible pour expédition le25 avril 2025Détails

Devis pour commande en gros
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Sélectionner une taille de conditionnement

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100 ML
88,30 €
500 ML
295,00 €

About This Item

Formule linéaire :
(CF2CF2)n
Numéro CAS:
9002-84-0
Numéro MDL:
MFCD00084455
Code UNSPSC :
12162002
ID de substance PubChem :
24884767
Nomenclature NACRES :
NA.23

88,30 €

Disponible pour expédition le25 avril 2025Détails

Devis pour commande en gros

Niveau de qualité

200

Concentration

60 wt % dispersion in H2O

Chaîne SMILES 

FC(=C(F)F)F

InChI

1S/C2F4/c3-1(4)2(5)6

Clé InChI

BFKJFAAPBSQJPD-UHFFFAOYSA-N

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Description générale

Le PTFE est un fluoropolymère synthétique du tétrafluoroéthylène. C'est un solide à base de fluorocarbure fluoré, constitué entièrement de carbone et fluor, et de haut poids moléculaire. Le PTFE est hydrophobe et son coefficient de friction contre n'importe quel solide est le plus faible.

Application

Du fait de son inertie chimique et de son hydrophobicité, le PTFE est couramment utilisé dans les gazes chirurgicales, les stents, les greffons et les structures servant de support pour la réparation des ligaments. Par exemple, le PTFE expansé peut servir à préparer des greffons vasculaires.

L'invariance de la constante diélectrique sur une large gamme de fréquence et la grande rigidité diélectrique du PTFE en font un matériau adapté à l'isolation des câbles et au stockage d'énergie à haute température.

Il peut aussi servir de revêtement facile à nettoyer, chimiquement inerte et anti-adhérent dans l'industrie alimentaire, chimique et pharmaceutique.

Caractéristiques et avantages

  • Grande résistivité chimique
  • Faible coefficient de frottement
  • Flexibilité
  • Grande stabilité thermique

Pictogrammes

Corrosion
GHS05

Mention d'avertissement

Danger

Mentions de danger

H318

Conseils de prudence

P280 - P305 + P351 + P338

Classification des risques

Eye Dam. 1

Code de la classe de stockage

10 - Combustible liquids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

Faites votre choix parmi les versions les plus récentes :

Certificats d'analyse (COA)

Lot/Batch Number
0000325014
MKCW0331
MKCW9686
MKCV1675
MKCT8014

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Si vous avez besoin d'une version particulière, vous pouvez rechercher un certificat spécifique par le numéro de lot.

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Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.

Consulter la Bibliothèque de documents

How to Start a Polytetrafluoroethylene (PTFE) Business (Beginners Guide) null
Rupali N Shah et al.
The Laryngoscope, 123(7), 1742-1745 (2013-02-19)
Nonparalytic glottic incompetence (GI) encompasses a variety of laryngeal pathologies, and vocal outcome data for this group is limited. We report a subgroup analysis of validated, subjective, and perceptual voice outcome measures: voice-related quality of life (VRQOL), Glottal Function Index
John W Myers et al.
The Journal of thoracic and cardiovascular surgery, 147(2), 672-677 (2013-11-21)
To evaluate outcomes of systemic to pulmonary artery shunts (SPS) in patients weighing less than 3 kg with regard to shunt type, shunt size, and surgical approach. Patients weighing less than 3 kg who underwent modified Blalock-Taussig or central shunts
Marco A Costa et al.
American heart journal, 165(4), 531-536 (2013-03-30)
Left ventricle (LV) remodeling after anterior wall myocardial infarction leads to increased LV volumes, myocardial stress, and, ultimately, heart failure (HF). Patients have high morbidity and mortality risk, and treatment remains limited. Percutaneous ventricular restoration (PVR) therapy using the Parachute
F Guérin et al.
The British journal of surgery, 100(12), 1606-1613 (2013-11-23)
Meso-Rex bypass (MRB) and portosystemic surgical shunt (PSS) are both used to treat extrahepatic portal vein obstruction (EHPVO) in children. The aim of this study was to analyse the outcome of MRB and PSS to select patients who could benefit
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Questions

1–10 sur 15 questions  

  1. When the emulsion was delivered, there was sediment at the bottom. Is this normal, or is it defective?

    1 réponse

    1. Precipitates may form over time while standing and can be re-dispersed by gentle agitation. Containers may be rolled or the product shaken gently just before use. High-speed agitation, pumping, or other violent agitation should be avoided to limit shearing or coagulation of particles and to minimize foaming. Precipitation may also occur if the product undergoes vigorous agitation or is exposed to high or low temperatures. The recommended temperature range is +7 to +24 °C. If particulates remain after gentle mixing, it may indicate irreversible aggregation. For further discussion, please visit https://www.sigmaaldrich.com/techservice and click on "Product Technical Inquiries" under the Products Section with all the required information for assistance from the Technical Service team.

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  2. What is the viscosity of the dispersion?

    1 réponse

    1. The viscosity of this material is not tested on a lot-to-lot basis. However, historical data indicates a viscosity of approximately 20 cP at 25°C.

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  3. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 réponse

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  4. How can I determine the shelf life / expiration / retest date of this product?

    1 réponse

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  5. Hi, Could you please let me know the density of the solution and the size of the PTFE particles in the solution? Thanks.

    1 réponse

    1. The density of this product is not determined on a lot to lot basis. However, a 60 wt% dispersion will have a density of 1.5 g/mL. The concentration of this dispersion may vary slightly from lot to lot. The particles have an average diameter of 0.220 um and may range from 0.150 - 0.500 um.

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  6. Hi, Can you tell me if this product is AD 309 E PTFE dispersion from AGC?

    1 réponse

    1. Unfortunately, the supplier information is considered proprietary. The measured properties are published in the product Certificate of Analysis. Please see the link below to review a sample or lot-specific Certificate:
      https://www.sigmaaldrich.com/product/aldrich/665800#product-documentation

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  7. What is the boiling point of the product?

    1 réponse

    1. This product is a 60% dispersion of PTFE in water. The boiling point has not been determined. The PTFE particles may settle at temperatures greater than 66°C, but can be redispersed by mild agitation. The melting peak temperature for these particles is 337°C.

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  8. What is the molecular weight of the polymer?

    1 réponse

    1. Unfortunately, the molecular weight of this product is not determined.

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  9. What are the recommended processing conditions for 665800-100ML?

    1 réponse

    1. The product 665800 PTFE dispersion retains its properties after exposure to 260 °C (500 °F). Processing guidelines entail using conventional dip or flow techniques for coating or impregnating high-temperature fabrics, fibers, and other products. Multiple passes can be used to achieve the desired thickness for a smooth, crack-free coating. Each coating layer is typically dried at 120 °C (250 °F) to remove water, baked at 270 °C (518 °F) to eliminate the wetting agent, sometimes calendered, and finally heated above the crystalline melting point of the resin particles, which is approximately 337 °C (639 °F).

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  10. what is the curing temperature? if it used to make thin film for detect oxygen concentration of aqueous

    1 réponse

    1. 665800 is PTFE dispersion in water. The curing temperature depends on its further applications. Generally, 80-100 °C should be good. Unfortunately, it hasn't been tested for the application of oxygen concentration detection.

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