Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1996-11-20
1998-03-31
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 13, 528 16, 528 18, 528 19, 528 21, 528 25, 528 29, 528 40, 528 43, C08G 7724
Patent
active
057340013
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a novel fluorosilicone compound and a novel curable fluorosilicone composition. Particularly the present invention relates to a lubricant, fiber treating agent, mold releasing agent, water- and oil-repelling agent, stain-proof coating agent, non-tackifying coating agent, coating agent for optical use, and sealant, which contain the above-mentioned fluorosilicone compound or composition.
BACKGROUND ART
A curable composition comprising a silicone polymer as a major component exhibits water- and oil-repelling property and mold-releasing property because of its low surface tension, and a number of such compositions have been known. Among them, the use of a fluorosilicone polymer has been studied in order to further enhance water- and oil-repelling property and mold releasing property.
For example, "Silicone Handbood" (Nikkan Kogyo Shimbunsha (1990)) discloses at pages 559 to 592, fluorosilicone polymers containing the structures shown below: ##STR1## and the like. However, curable compositions containing those fluorosilicone polymers do not have sufficient properties such as water-repelling property and oil-repelling property. Also, the production of those fluorosilicone polymers requires complicated and costly process steps.
Also JP-A-301963/1993 and JP-A-302034/1993 disclose curable fluorosilicone polymer compositions having high water- and oil-repelling property, but unless a specific fluorine-containing compound is used as a curing agent, compatibility with the fluorosilicone polymer is not good and curing is insufficient, and thus, satisfactory characteristics cannot be obtained.
On the other hand, when the above-mentioned specific curing agent is used, the obtained composition becomes costly.
Also though studies have been made to enhance water-repelling property, oil-repelling property, mold releasing property and the like by adding a silane coupling agent having a perfluoroalkyl group to the curable silicone compounds, compatibility and is worse and uniformly cured film cannot be obtained, and in case where compatibility is good, water-repelling property, oil-repelling property and mold releasing property of the resulting cured film are insufficient and not satisfactory.
The conventional curable fluorosilicone polymer compositions have the drawbacks as mentioned above, and therefore their applications are limited.
An object of the present invention is to provide a curable polysiloxane composition which does not have the above-mentioned drawbacks, that is, a curable fluorosilicone polymer composition which can use a usual general-purpose curing agent and therefore is inexpensive, and can form a cured film having a low surface tension (high water-repelling property, high oil-repelling property, non-tackiness, and the like) after cured, and to provide a novel fluorosilicone compound which is a major component of the above-mentioned composition.
Further the present invention can provide various applications of the curable fluorosilicone polymer composition containing the novel fluorosilicone compound.
DISCLOSURE OF THE INVENTION
Namely, the present invention relates to a fluorosilicone compound having at least two hydroxyl groups in its molecule and represented by the formula (I): ##STR2## wherein R.sub.f is a perfluoroalkyl group having 4 to 20 carbon atoms, and a part of fluorine atoms may be replaced by chlorine atom, hydrogen atom or the both of them; R.sup.1 is an alkylene group having 1 to 5 carbon atoms or a hydroxyalkylene group having 2 to 5 carbon atoms; R.sup.2 is an alkylene group having 1 to 12 carbon atoms, an oxyalkylene group having 2 to 50 carbon atoms or a hydroxyalkylene group having 3 to 15 carbon atoms; R.sup.3 and R.sup.4 are the same or different and each is at least one of an alkyl having 1 to 4 carbon atoms, phenyl or a fluoroalkyl group having 1 to 3 carbon atoms; X is oxygen atom, sulfur atom, NH or CO.sub.2 ; a is an integer of 5 to 1,000; provided that at least one of R.sup.1 or R.sup.2 is the above-mentioned hydroxyalkylen
REFERENCES:
International Search Report in PCT/JP95/01008 mailed Sep. 5, 1995.
Kashiwagi Masato
Otsuka Tatsuya
Sakashita Hirotoshi
Yamaguchi Fumihiko
Yamana Masayuki
Daikin Industries Ltd.
Marquis Melvyn I.
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