Fluorocopolymer

A fluorinated copolymer, non-fluorinated technology, used in tubular articles, applications, household appliances, etc., can solve problems such as heat resistance, mechanical strength, such as insufficient stress crack resistance

Inactive Publication Date: 2005-07-27
AGC INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such ethylene / tetrafluoroethylene copolymers are insufficient in heat resistance, mechanical strength such as stress crack resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A polymerization vessel with an inner volume of 94 liters, equipped with a stirrer, removed air, added 71.3 kg of 1-hydrotridetrifluorohexane, 20.4 kg of 1,3-dichloro-1,1,2,2,3- Pentafluoropropane (hereinafter referred to as AK225cb, manufactured by Asahi Glass Company Limited), 562 g of CH 2 =CH(CF 2 ) 2 F and 4.45 g of IAH, the temperature in the reactor was raised to 66°C. The pressure was increased to 1.5 MPa / G by gas with a molar ratio of 89 / 11 TFE / E. Polymerization was initiated by adding 1 liter of a solution of 0.7% tert-butyl peroxypivalate in 1-hydrotridetrifluorohexane. Constantly adding TFE / E mixed gas with a molar ratio of 59.5 / 40.5 kept the pressure constant during the reaction. Based on the total moles of TFE and E added, continuously add 3.3 mol% of CH 2 =CH(CF 2 ) 2 F and 0.8 mol% IAH. Add 7.28 kg of monomer mixed gas within 9.9 hours after initiating the polymerization reaction, the temperature in the polymerization reactor drops to room temper...

Embodiment 2

[0069] The particles 1 of the fluoropolymer 1 prepared in Example 1 were compression molded at 300° C. to obtain a sheet with a thickness of 1 mm, a width of 2.5 cm, and a length of 10 cm. The sheet was placed on a SUS304 plate for sandblasting, and kept at 260° C. for 20 minutes to melt the fluorocopolymer 1 to form a coating film. During the formation of the coating film, the coating film has no color change and is excellent in heat resistance. A peel test was performed, but the coating film was broken because the fluorocopolymer 1 was firmly bonded to the SUS304 plate.

[0070] The SUS304 plate with fluorocopolymer 1 coating film was immersed in concentrated hydrochloric acid at 100°C for one week, and then the peeling test was performed. The coating film was firmly bonded and could not be peeled off.

[0071] Particle 1 was compression-molded at 300°C to produce a film with a thickness of 0.1mm. The accelerated weather resistance test was carried out with a super ultravio...

Embodiment 3

[0073] Using the same reaction vessel as Example 1, remove the air, add 902 kg of AK225cb, 0.216 kg of methanol, 31.6 kg of CF 2 = CFOCF 2 CF 2 CF 3 and 0.43 kg of IAH. The temperature in the reactor was raised to 50° C., and TFE was added to make the pressure reach 0.38 MPa. 50 ml of 0.25% di(perfluorobutyryl) peroxide AK225cb solution was added to make a polymerization initiator to initiate the polymerization. The pressure was kept constant by continuously feeding TFE during the polymerization. The polymerization initiator solution needs to be added selectively so that the rate of TFE addition is sufficiently stable. The above-mentioned polymerization initiator solution can also be optionally added to keep the TFE feeding rate substantially constant, and the total amount of the initiator solution added is 120 milliliters. Continuously add IAH in an amount of 1 mol% of the amount of TFE added. 7.0 kg of TFE was added within 6 hours after the initiation of the polymeriz...

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Abstract

A fluorocopolymer which comprises (a) polymerized units based on tetrafluoroethylene and / or chlorotrifluoroethylene, (b) polymerized units based on a fluorinated monomer (excluding tetrafluoroethylene and chlorotrifluoroethylene) and (c) polymerized units based on at least one member selected from the group consisting of itaconic acid, itaconic anhydride, citraconic acid and citraconic anhydride, wherein (a) is from 50 to 99.8 mol %, (b) is from 0.1 to 49.99 mol %, and (c) is from 0.01 to 5 mol %, based on ((a)+(b)+(c)), and which has a volume flow rate of from 0.1 to 1000 mm<3> / sec.

Description

[0001] This application is a divisional application of the invention patent application with application number 03147126.9 and the invention name is "fluorocopolymer". field of invention [0002] The present invention relates to fluorocopolymers, which are excellent in chemical resistance, heat resistance, weather resistance, and stress crack resistance, and have good bonding properties with synthetic resins, metals, metal oxides, glass or ceramics. Background of the invention [0003] Fluorine copolymers such as polytetrafluoroethylene, tetrafluoroethylene / perfluoro(alkyl vinyl ether) copolymer, ethylene / tetrafluoroethylene copolymer, etc. are widely used in various fields such as semiconductor industry and automobile industry. [0004] Fluoropolymers have excellent heat resistance, chemical resistance, weather resistance, and gas barrier properties, but poor adhesion to other materials. For example, in order to bond fluoropolymers to synthetic resins, metals, metal oxides,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/455B29C48/32B32B27/08B32B27/28B32B27/34C08F214/00C08F214/18C08F214/26
CPCB32B27/34C08F214/26B32B27/08B32B27/28C08F214/18Y10T428/1321Y10T428/139Y10T428/1393Y10T428/3154Y10T428/31544B32B1/08B32B27/322B32B2307/306B32B2307/712B32B2377/00B32B2597/00
Inventor 船木笃鹫见直子西栄一
Owner AGC INC
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