Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1993-09-13
1995-07-18
Bell, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 33, 528 34, C08G 7712, C08G 7718, C08L 8305
Patent
active
054342341
DESCRIPTION:
BRIEF SUMMARY
The invention relates to organo(poly)siloxanes, to their preparation and to their use.
Linear organo(poly)siloxanes containing different terminal groups, where one terminal group is a triorganosiloxy group and one terminal group is a condensable group, such as a hydroxyl or alkoxy group, are disclosed, for example, in EP-A 311 061 (laid-open 12 April 1989, Ona Isao et al., Toray Silicone Company), DE-A 39 39 482 (laid-open 31 May 1990, Kogure et al., Kansai Paint Co.) and DE-A 39 32 231 (laid-open 29 Mar. 1990, Yoshioka et al., Shin-Etsu Chemical Co.).
The invention relates to organo(poly)siloxanes of the general formula monovalent, optionally substituted hydrocarbon radicals, substituted hydrocarbon radical,
R and R.sup.2 are preferably monovalent, optionally substituted hydrocarbon radicals having 1 to 13 carbon atom(s) per radical.
R.sup.1 is preferably an alkyl radical having 1 to 13 carbon atom(s) per radical, which may be substituted by an ether oxygen atom.
n is preferably an integer from 3 to 1,000, preferably from 9 to 100.
Although not shown by the formula (I), up to 5 mol per cent of the diorganosiloxane units may be replaced by other siloxane units, such as, for example, RSiO.sub.3/2 and/or SiO.sub.4/2 units, where R is as defined above. In addition, the organo(poly)siloxanes of the formula (I)--although again not shown in the formula (I)--may, as a consequence of the preparation, contain up to 20 mol percent of other functional groups, such as, for example, hydroxyl groups. Furthermore, the organo(poly)siloxanes according to the invention, although not indicated in the formula (I), may, as a consequence of the preparation, also contain a small amount of--OSiH(OR.sup.1) groups or (R.sup.1 O)SiR.sub.2 groups, where R and R.sup.1 are as defined above.
Examples of hydrocarbon radicals R and R.sup.2 are alkyl radicals, such as the methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert.-butyl, n-pentyl, isopentyl, neopentyl and tert.-pentyl radicals, hexyl radicals, such as the n-hexyl radical, heptyl radicals, such as the n-heptyl radical, octyl radicals, such as the n-octyl radical, and iso-octyl radicals, such as the 2,2,4-trimethylpentyl radical, nonyl radicals, such as the n-nonyl radical, decyl radicals, such as the n-decyl radical, and dodecyl radicals, such as the n-dodecyl radical; alkenyl radicals, such as the vinyl and allyl radicals; cycloalkyl radicals, such as cyclopentyl, cyclohexyl and cycloheptyl radicals, and methylcyclohexyl radicals; aryl radicals, such as the phenyl and naphthyl radicals; alkaryl radicals, such as o-, m-, p-tolyl radicals, xylyl radicals and ethylphenyl radicals; aralkyl radicals, such as the benzyl radical and the alpha- and the .beta.-phenylethyl radicals.
Examples of substituted hydrocarbon radicals are haloalkyl radicals, such as the 3,3,3-trifluoro-n-propyl radical, 2,2,2,2'2'2'-hexafluoroisopropyl radical and the heptafluoroisopropyl radical; haloaryl radicals, such as the o-, m- and p-chlorophenyl radical; and acyloxyalkyl radicals, such as the acetoxyethyl radical and the (meth)acryloxypropyl radical.
Examples of alkyl radicals R and R.sup.2 apply fully to alkyl radicals R.sup.1. Examples of alkyl radicals R.sup.1 which are substituted by an ether oxygen atom are alkoxyalkyl radicals, such as the methoxyethyl and ethoxyethyl radicals.
R is preferably an alkyl radical, particularly preferably a methyl radical.
R.sup.1 is particularly preferably an ethyl radical.
R.sup.2 is preferably an alkyl radical, alkenyl radical or substituted hydrocarbon radical, but particularly preferably a methyl, vinyl, allyl or (meth)acryloxypropyl radical.
Examples of organo(poly)siloxanes according to the invention are those of the formulae ##STR1## where Me is a methyl radical, Et is an ethyl radical and n is as defined above.
The organo(poly)siloxanes according to the invention have a viscosity of, preferably, from 1 to 10,000 mPa.s at 23.degree. C.
The organo(poly)siloxanes according to the invention are preferably prepared by reacting an .alpha.-hydroxyorgano(poly)si
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Ullmanns Encyklopadie der technischen Chemie, 4th Edition, 1982, vol. 21, pp. 285 ff., Verlag Chemie, Weinheim.
Literal translation to DE 40 29 481.
Mueller Johann
Stepp Michael
Bell James J.
Connaughton Martin
Lee Helen F.
Wacker-Chemie GmbH
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