CYTOP™ Amorphous Fluoropolymers

Same excellent chemical, thermal, electrical and surface properties as conventional fluoropolymers like PTFEs, but also exhibit high optical transparency and good solubility in specific fluorinated solvents. CYTOP fluoropolymers are like transparent PTFEs.

The thermoplastic characteristics of CYTOP, coupled with its transparency, solubility, insulation properties, resistance to chemicals, and oils/water repellency, make it a popular choice for coating electronic materials. CYTOP amorphous fluoropolymers exhibits low refractive index, low coefficient of optical dispersion and good lamination properties. CYTOP amorphous fluoropolymers are available on request in various solvents (110ºC – 180ºC) and at various concentrations.

Related Information

Transparency
Mold release
Electric insulation
Water and oil repellency
Chemical resistance
Moisture-proof
Low refractive index
Low coefficient of optical dispersion
Good lamination properties

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Inter-level dielectric layer for semiconductors
Pelicles
Non-autofluorescence hydrophobic coating of microfluidics
Hydrophobic coating of Electrowetting devices
Antifouling coatings for photomasks
Optical film
Anti-reflective coatings
Graded-index optical fibers

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Characteristics

High Transmittance: DUV 200 nm – NIR 2.0 µm > 95%
Low Refractive Index, Minimal Color Observation: nD: 1.34, Abbe #: 90
Electrical Properties: Dielectric constant: 2.1, volume resistivity > 1017 Ω·m
Thin Film Coating: Soluble in perfluoro solvent: film thickness beyond 0.1 µm

Fluoropolymer Category

	Fluoropolymer		Perfluoropolymer
Crystalline	ETFE PVDF PVF ECTFE		PTFE PFA FEP
Amorphous	Resins	LUMIFLON¹	CYTOP¹
	Rubber	AFLAS¹ Viton² Fluorel³	Kalrez²

¹Registered trademark of Asahi Glass.
²Registered trademark of DuPont.
³Registered trademark of 3M.

Optical Properties

	CYTOP	PTFE	PFA	PMMA	Remarks
Refractive Index	1.34	1.35	1.35	1.49	Abbe Refractormeter
Transmittance (%)	95	opaque	opaque	93	Visible Region, 200 µm
Abbe Number	90	--	--	55	Abbe Refractometor

Physical Properties

	CYTOP	PTFE	PFA	PMMA	Remarks
Glass Transition Temperature (°C)	108	(130)	(75)	105-120	DSC
Melting Point (°C)	not observed	327	310	iso 160 syn 200	DSC
Density (g/cm³)	2.03	2.14-2.20	2.12-2.17	1.19-1.20	25 °C
Contact Angle of Water (degree)	110	114	115	80	25 °C
Critical Surface Tension (dyn/cm)	19	18	18	39	25 °C
Water Absorptivity (%)	<0.01	<0.01	<0.01	0.3	60 °C in water
Durometer Hardness	HDD78	HDD55	HDD58-60	HDD92	ASTM D2240
Linear Expansion Coefficient (cm/cm/°C)	7.4*10^-5	1.0*10^-4	1.3*10^-4	8.0*10^-5	TMA (40-100 °C)

Gas Permeation		Comparison of Oxygen
Gas	Permeability (cm³cm/cm²s Pa)	Product	Oxygen Permeation (cm³ cm/cm²s Pa)
He	8.9*10^-12	CYTOP	4.2*10^-13
O₂	4.2*10^-13	PTFE	3.2*10^-13
N₂	1.0*10^-13	PE	2.2*10^-13
		Saran	4.0*10^-16

Moisture Permeation
Product	Permeability (cm³ cm/cm²s Pa)
CYTOP	1.1*10^-12
PI	4.3*10^-11
Silicon Rubber	3.2*10^-9
HDPE	9.0*10^-13
Saran	7.0*10^-13

Chemical Resistance

Chemicals	Appearance	Remarks
Acids 12N HCl 99% H₂SO₄ 50% HF	No change	60 °C1 week 60 °C1 week R.T.*1 week
Alkalis 10% NaOH 44% NaOH	No change	60 °C*1 week
Organic Solvents Hexane Benzene Acetone Methylethylketone Trichloro Ethylene Carbon Tetrachloride	No change	R.T.*1 week

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How to read the "Grade"

CTX-809AP2 / CTL-109AE/CTL-809M

CYTOP	Molecular Weight	Boiling Point of Solvent	Polymer Content (%)	Functional Group	Optional
Brand	X: standard (250K to 300K) L: low (150K to 200K)	1: 100 °C/100 series for dip coating 8: 180 °C/800 series for spin coating	7% or 9% concentration of the solution	A: standard M: for adhesion to inorganic materials	E, P, P2, none
CT	X	8	09	A	P2
CT	L	1	09	A	E
CT	L	8	09	M

Major Types of CYTOP™

Dip Coating: CTL-109AE
Spin Coating: CTX-809A; CTX-809AP2; CTL-809M

How to use CYTOP™

AGC normally supplies a 9% solution.
To achieve the thickness desired, control the concentration of the CYTOP™ solution as well as speed of coating. For this purpose, we supply the solvent at the same time as the CYTOP™ solution.

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First purchase procedure

Please find below the procedures for purchasing CYTOP™ for the first time:

Because there are several CYTOP grades, we need some technical information to recommend the best grade for your application.
CYTOP™ is regulated by Japanese and European laws, and an export license is necessary. If you are not involved in atomic, military or chemical weapon activity, getting a license will take time but should not be a problem. However, if an export license is not granted, AGC has the right to decline your request or order.
The enclosed questionnaire asks you for technical information, information needed to apply for an export license and delivery information. Please complete this questionnaire and send it back to us at your earliest convenience.
For the first trial, we offer our standard package (“Starter Kit”) containing 100 g CYTOP solution + 300 g solvent.
Price is dependent on the specific CYTOP grade. Please contact us at Naoyuki-miyazawa@agc.com to request the price for a suitable grade and application. The price includes delivery costs to your premises, but does not include import duty and VAT (delivery term is DAP Incoterm 2010). Please note that, from 2015, the commercial conditions will change for the “only solvent order.”
Standard delivery time is 4-6 weeks after receipt of your order sheet or advance payment (depending on which method is used). For the first purchase, however, the delivery time is longer because of the procedure for obtaining the export license.If you agree to the above procedure, click the button below. You will then be taken to a questionnaire. After you submit your completed questionnaire, we will proceed with filling your request. Thank you for your interest in CYTOP™.

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