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Surface modification method and surface modification elastormer

A technology of surface modification and thermoplastic elastomer, which is applied in tire parts, transportation and packaging, special tires, etc. It can solve the problems of PTFE’s resistance to radiation, sterilization, and the inability to use irradiation rays, etc., and achieve excellent drainage or snow removal performance , Prevention of adsorption or aggregation, excellent sliding properties

Active Publication Date: 2013-07-31
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, PTFE is not resistant to radiation, and there is also a problem that it cannot be sterilized by irradiation

Method used

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  • Surface modification method and surface modification elastormer
  • Surface modification method and surface modification elastormer
  • Surface modification method and surface modification elastormer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0147] Chlorobutyl rubber (unsaturation: 1 to 2%) containing isoprene units is cross-linked with triazine to obtain vulcanized rubber (cured at 180°C for 10 minutes), and the vulcanized rubber is impregnated in benzophenone 3wt% acetone solution to make benzophenone adsorb on the surface of vulcanized rubber. LED light having a wavelength of 365 nm was irradiated for 10 minutes to immobilize the benzophenone. Then, the vulcanized rubber is taken out and dried.

[0148] 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 10-heptadecafluorodecyl acrylate (Sigma Aldrich) solution, and cover the surface with a glass plate. The glass plate is irradiated with LED light with a wavelength of 365nm for two hours to carry out radical polymerization, so that the polymer chain grows on the rubber surface to obtain a surface-modified elastomer (polymer brush).

Embodiment 2）

[0150] In addition to using 3-perfluorohexyl-2-hydroxypropyl acrylate (F(CF 2 ) 6 CH 2 CH(OH)CH 2 OCOCH=CH 2 : Daikin R1633), the surface-modified elastomer was produced in the same manner as in Example 1.

Embodiment 3）

[0152] Except for the use of 3-(perfluoro-3-methylbutyl)-2-hydroxypropyl acrylate ((CF 3 ) 2 CF (CF 2 ) 2 CH 2 CH(OH)CH 2 OCOCH=CH 2 : FluoroChem Co., Ltd.), the surface-modified elastomer was produced in the same manner as in Example 1.

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Abstract

The invention provides a surface modification method of vulcanized rubber or thermoplastic elastomer, which can provide excelent sliding property and repeatedly sliding durability and maintain sealing property without using high-priced self-lubricated resin. The invention relates to a surface modification mehtod, whose modification object is vulcanized rubber or thermoplastic elastomer, and the method comprises the following steps: process 1, surface irradiation of the modificed object with 300-400 nm LED light, thereby forming a polymerization trigger from the photosensitizer on the surface; process 2, surface irradiation of the modificed object with 300-400 nm LED light, thereby carrying out free radical polymerization of free radical polymerized monomers using the polymerization trigger as starting point, and carrying out growth of the polymer chain on the surface of the modified object.

Description

technical field [0001] The present invention relates to a surface modification method and a surface-modified elastomer such as a syringe gasket having at least a part of the modified surface obtained by the modification method, a tire having at least a part of the groove surface of a tire, and the like. Background technique [0002] The part that maintains a sealed state and slides, such as a gasket, is integrated with the plunger of the syringe to seal the plunger and the syringe. It pays attention to sealing performance and uses elastic bodies such as rubber, but there are some problems with sliding performance (see Patent Document 1). Therefore, a slippery improving agent such as polysiloxane oil is applied to the sliding surface, but recently it has been pointed out that polysiloxane may have adverse effects on marketed biological agents. On the other hand, gaskets not coated with a slidability improving agent have poor slidability, so the plunger cannot be pushed down ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/18C08L21/00C08L101/00B60C1/00
Inventor 皆川康久
Owner SUMITOMO RUBBER IND LTD
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