Aminosiloxane-containing compositions

Details Aminosiloxane-containing compositions Aminosiloxane-containing compositions

1998-10-26

2001-03-13

Dawson, Robert (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C528S031000, C528S032000, C528S037000, C528S042000, C528S033000, C528S034000, C528S038000, C528S015000, C556S470000, C556S478000, C427S154000, C510S400000, C106S002000

Reexamination Certificate

active

06201058

ABSTRACT:

TECHNOLOGICAL FIELD
The invention relates to organopolysiloxanes that have amino groups and are solid at room temperature, to compositions which comprise these compounds, to processes for their preparation and to a process for the treatment of surfaces therewith.
DESCRIPTION OF THE RELATED ART
The use of organopolysiloxanes in cleaning compositions, such as, for example, solutions for washing windows, car polishes, glass ceramic care agents, metal and textile cleaners, is known. The publications GB Patent 1,172,479, U.S. Pat. No. 3,681,122 and U.S. Pat. No. 4,124,523 essentially describe cleaners comprising an organopolysiloxane, an alkali metal salt from main groups 1 to 5, a scouring agent and water, and where necessary, a thickener and a nonionic surfactant. Although these formulations are in principle suitable for cleaning surfaces, the protecting, maintenance, and hydrophobicizing properties are completely inadequate. EP 0 548 789 A1 describes care agents for hard surfaces which are substantially free of organic solvent and are prepared using organopolysiloxanes that are solid at room temperature. The care agents are notable for a high resistance to weathering and washing, but exhibit inadequate color saturation and gloss depth. U.S. Pat. No. 4,699,988 describes wax-like silanes and siloxanes having amine functions. Long-chain alkyl radicals are bonded to the siloxane via a Si—O—C bond which, as the person skilled in the art knows, is undesirably unstable to hydrolysis, particularly when the pH deviates from seven.
DE-A 33 21 289 describes a water-in-oil emulsion for cleaning glass ceramic surfaces which comprises a liquid aminofunctional organopolysiloxane, a cyclic dimethylpolysiloxane, a polysiloxane-polyoxyalkylene block copolymer, a scouring powder, a surfactant and water. Although this formulation likewise has cleaning power, the protective effect of the liquid aminofunctional organopolysiloxane present as protective film former, in particular against burnt-on food remains which have a high content of sugar, is unsatisfactory. DE Patent 29 52 756 describes compositions which include a metal oxide- and/or amino group-containing polysiloxane, a scouring and cleaning agent and additional surfactants. Although the care agents in question have a cleaning and conditioning effect, they have a short shelf life as a result of a continual increase in viscosity, exhibit poor polishability and an insufficient protective effect against burnt-on foods which have a high sugar content. DE-A 33 27 926 presents an emulsion formulation which comprises a liquid aminofunctional polydimethyl-siloxane, emulsifiers, acidic constituents, a solvent, a scouring agent, protective film-improvers and water. Although the care agents in question have a cleaning and conditioning effect, they exhibit the same disadvantages as described for DE Patent 29 52 756.
SUMMARY OF THE INVENTION
The object was thus to provide compositions based on organopolysiloxanes which overcome the disadvantages of the prior art and, in particular, exhibit a very good, long-term protective and care effect, and a very good, long-term hydrophobicization, coupled with excellent color saturation and gloss depth. The object has been achieved by the invention described below, in which organopolysiloxanes bearing amino groups, which are solid at room temperature, but which reversibly change their states of aggregation, are used to treat surfaces.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention thus provides organopolysiloxanes that have amino groups and are solid at room temperature which can reversibly change their states of aggregation on the basis of temperature changes. For the purposes of the invention, the reversible change in the state of aggregation means that the solid state of aggregation reversibly changes into the liquid state of aggregation and vice versa. Room temperature should be taken to mean a temperature of 20° C. in the text below.
The organopolysiloxanes that have amino groups and are solid at room temperature are preferably those containing siloxane units of the general formula I
R
1
a
R
2
b
R
3
c
SiO
(4-a-b-c)/2
  (I)
in which
R
1
can be identical or different and preferably signifies monovalent unsubstituted or fluorine-, chlorine- or bromine-substituted hydrocarbon radicals having, preferably, from 1 to 12 carbon atoms, alkoxy radicals having, preferably, from 1 to 12 carbon atoms, hydroxy radicals or halogen radicals,
R
2
can be identical or different and preferably signifies monovalent unsubstituted hydrocarbon radicals having, preferably, from 1 to 40 carbon atoms,
R
3
can be identical or different and preferably signifies hydrocarbon radicals containing amino groups,
a is 0, 1, 2 or 3,
b is 0, 1 or 2,
c is 0, 1 or 2,
with the proviso that the sum a+b+c is less than or equal to 3, and in the whole molecule, there is at least one unit which has a hydrocarbon radical containing amino groups.
Preference is given to linear or cyclic organopolysiloxanes that have amino groups and are solid at room temperature or any mixtures thereof which have the formulae II
R
1
d
R
2
e
R
3
f
SiO(SiR
1
R
2
O)
x
[(SiR
1
R
3
O)
r
(SiR
1
2
O)
s
]
y
SiR
1
d
R
2
e
R
3
f
  (II)
and III
[(SiR
1
R
4
O)]
z
  (III)
in which
R
1
, R
2
and R
3
are as defined above,
R
4
can be identical or different and signifies R
1
, R
2
or R
3
,
d is 1, 2 or 3,
e is 0, 1 or 2,
f is 0, 1 or 2,
r is an integer from 0 to 150, preferably from 0 to 100, particularly preferably from 0 to 50,
s is an integer from 0 to 200, preferably from 0 to 150, particularly preferably from 0 to 100,
x is an integer from 0 to 300, preferably from 0 to 200, particularly preferably from 0 to 100,
y is an integer from 0 to 200, preferably from 0 to 150, particularly preferably from 0 to 100,
the sum x+y is from 0 to 500, preferably 350 and particularly preferably 200,
it being possible for the units (SiR
1
R
3
O)
r
and (SiR
1
2
O)
s
to be in any order,
z is an integer from, preferably, 3 to 30, more preferably from 3 to 20, particularly preferably from 3 to 12,
preferably with the proviso that at least one radical R
2
in formula II signifies a hydrocarbon radical having at least 14 carbon atoms, and at least one radical R
3
is present in formula II,
and preferably with the proviso that at least the radical R
4
in formula III has at the same time the meaning of R
2
once and the meaning of R
3
once.
The radical R
1
is preferably a C
1
- to C
12
-hydrocarbon radical, C
1
- to C
12
-alkoxy radical, a halogen radical or a hydroxy radical.
Examples of radicals R
1
are preferably 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 isooctyl 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 vinyl and allyl radicals; cycloalkyl radicals such as cyclopentyl, cyclohexyl, cycloheptyl radicals and methylcyclohexyl radicals; aryl radicals such as the phenyl and the naphthyl radicals; alkaryl radicals such as the o-, m-, p-tolyl radicals, xylyl radicals and ethylphenyl radicals; aralkyl radicals such as the benzyl radical, the &agr;- and the &bgr;-phenylethyl radicals; and halogen radicals such as the chlorine, fluorine, bromine and iodine radicals.
The alkoxy radicals R
1
are alkyl radicals described above bonded via an oxygen atom. The examples of alkyl radicals also fully apply to the alkoxy radicals.
R
1
is particularly preferably the methyl radical, the methoxy radical, the chlorine radical and the hydroxy radical.
The radical R
2
is preferably a hydrocarbon radical having from 14 to 40 carbon atoms, preferably a hydrocarbon radical having from 14 to 32 carbon atoms, the n-octadecyl radica

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