Polishes comprising aminoorganopolysiloxanes containing...

Details Polishes comprising aminoorganopolysiloxanes containing... Polishes comprising aminoorganopolysiloxanes containing...

2000-05-18

2002-05-14

Koslow, C. Melissa (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Polishes

C106S287110, C106S287130, C106S287140, C556S467000

Reexamination Certificate

active

06387166

ABSTRACT:

TECHNICAL FIELD
The invention relates to polishes for surfaces, comprising aminoorganopolysiloxanes which are solid at room temperature, contain fluoro groups, and are able to change their aggregate state reversibly as a result of changes in temperature.
BACKGROUND ART
Fluoroorganopolysiloxane-based polishes for hard surfaces, such as for automobile bodies, are already known. Reference may be made here, for example, to JP-A-4202389, which describes a polish obtained by dispersing in water, a fluorinated organopolysiloxane synthesized by reacting a hydroxyl-containing methyltrifluoropropylsiloxane having a fluorine content of from 0.1 to 26.5% by weight with a dimethylsiloxane crosslinked with a silicon alkoxide, and a wax or waxlike substance. The fluorinated organopolysiloxane is a solid, branched silicone rubber whose aggregate state is no longer reversible.
JP-A-3227383 describes a polish comprising trimethylsilyl-blocked polymethyl (trifluoropropyl) siloxane and waxes such as carnauba wax 12, Hoechst wax PE 1303 and MINK 5, and an aliphatic solvent. The fluorinated organopolysiloxane is a liquid siloxane which, due to its aggregate state, is readily removable by washing and/or reemulsification.
DE-A-3635093 describes the preparation of fluorine-containing siloxanes by reacting fluoro-containing alcohols with siloxanes containing Si—H moieties. The products thus prepared, however, have the disadvantage that owing to the thus formed Si—O—C linkage, they react in aqueous systems to form silanols, which then polymerize by condensation. As a further cleavage product, the fluoro-containing alcohol used is also obtained. DE-A-3635093 further discloses the preparation of fluoro-containing products by reaction of Si—H components with corresponding fluoro-containing olefins as being the state of the art.
The known fluorine-containing organopolysiloxanes are, if in liquid form, reemulsifiable or able to be washed away by water. If these organopolysiloxanes are crosslinked, i.e., are in the form of a silicone rubber, they can no longer change their aggregate state, which makes them very difficult to apply, since they cannot be refluidized by the frictional heat produced during their application.
Oleophobicizing polishes based on fluorinated organopolysiloxanes solid at room temperature are known from DE 195 39 940 A1. The compounds prepared in the manner described therein, using transition metals such as platinum and derivatives thereof, are gray and, as a result, exhibit disadvantages in performance tests, since the preference is for solely white compounds.
Disclosure of Invention
An object of the present invention is to provide polishes which exhibit good hydrophobicization in conjunction with good oleophobicization, and which do not have any gray coloration. These and other objects are achieved by the invention.
Best Mode for Carrying Out the Invention
The present invention provides polishes for surfaces, comprising aminoorganopolysiloxanes (A) which are solid at room temperature, contain fluoro groups, and are able to change their aggregate state reversibly as a result of changes in temperature. Reversible changing of the aggregate state means that the solid aggregate state changes reversibly to the liquid aggregate state, and vice versa.
The aminoorganopolysiloxanes (A) are pure white, since a judicious mode of preparation makes it possible to do without transition metal catalysts. The polishes exhibit high weathering stability and wash resistance and are distinguished by an oleophobic character. The aminoorganopolysiloxanes (A) adhere durably to the substrate.
The aminoorganopolysiloxanes (A) are preferably waxlike compounds which meet one or more of the following criteria:
The liquidity point or melting point is at least 20° C., preferably at least 40° C. and not more than 60° C., and more preferably not more than 50° C. at 1000 hPa;
The melt viscosity is not more than 10,000 mPa·s, preferably not more than 8000 mPa·s, when measured at 10° C. above the liquidity point;
The compounds are polishable under gentle pressure;
The compounds exhibit pronounced dependence of solubility and consistency with respect to temperature;
At 20° C., the compounds are kneadable or hard and fragile, amorphous to finely crystalline but not glasslike, highly viscous or liquid;
The compounds are meltable without decomposition;
Above the melting point, the compound's viscosity exhibits a pronounced negative temperature dependence;
The liquid aminoorganopolysiloxane (A) has no tendency toward stringiness; and
The aminoorganopolysiloxane (A) can form pastes or gels.
The polishes preferably contain no organic solvent. However, they may include small amounts, such as up to a maximum of 2% by weight, for example, based on the overall weight of the polish, of an organic solvent which functions, for instance, as a preservative. In principle, however, systems based primarily on organic solvents are also provided by the invention.
In the text below, room temperature should be understood to mean a temperature of 20° C.
Aminoorganopolysiloxanes (A) are preferably those comprising units of the general formula I
A
a
R
b
SiX
c
O
(4-a-b-c)/2
  (I),
where
R can be identical or different and is a monovalent, unsubstituted or substituted hydrocarbon radical having 1 to 40 carbon atoms,
X is identical or different and is a chlorine atom or a radical of the formula —OR
1
where R
1
is hydrogen atom or an alkyl radical having 1 to 8 carbon atoms, which can be substituted by ether oxygen atoms, or is a radical of the general formula (II)
—R
2
{[CH(CH
3
)CH
2
O]
e
[CH
2
CH
2
O]
f
[(CH
2
)
4
O]
g
R
3
}
y−1
  (II),
 where
R
2
is a divalent, trivalent or tetravalent hydrocarbon radical having 2 to 30 carbon atoms which can be interrupted by oxygen atoms and is substituted by one or more groups of the formulae
—C(O)—O—, —C(O)—NR
3
—, —SO
2
—NR
3
—, —NR
3
—, —N═ and —S—
y in accordance with the valence of radical R
2
is 2, 3 or 4,
R
3
is a hydrogen atom or a hydrocarbon radical which has 1 to 40 carbon atoms and is unsubstituted or substituted by a group —C(O), and
e, f and g in each case, independently of one another, are 0 or an integer from 1 to 200, with the proviso that the sum e+f+g is ≧1,
A is a radical of the general formula III
—R
4
{—C
n
F
2n+1
}
y−1
  (III),
 where
R
4
has a definition stated for R
2
,
y in accordance with the valency of radical R
4
is 2, 3 or 4 and n is a number from 1 to 40,
a is 0, 1 or 2,
b is 0, 1, 2 or 3, and
c is 0, 1, 2 or 3,
with the proviso that the sum a+b+c is ≦4 and
aminoorganopolysiloxane (A) has at least one radical A per molecule.
The aminoorganopolysiloxanes (A) preferably consist of units of the general formula (I). As stated by the description of the subject invention compounds as aminoorganopolysiloxanes, the aminoorganopolysiloxanes must contain minimally one aminoorgano group.
The average value of a is preferably from 0.001 to 1.0, with particular preference from 0.01 to 0.5. The average value of b is preferably from 0 to 3.0, with particular preference from 0.2 to 2.5. The average value of c is preferably from 0 to 3.0, with particular preference from 0 to 2.
The aminoorganopolysiloxanes (A) preferably possess an average molecular weight of from 400 to 1,000,000 g/mol, with particular preference from 500 to 150,000 g/mol, and a viscosity at 60° C. of preferably from 10 to 1,000,000 mm
2
/s, with particular preference from 20 to 100,000 mm
2
/s. At room temperature, i.e., at 20° C., the compounds in question are solids.
Examples of radicals R are alkyl radicals such as the methyl, ethyl, n-propyl, iso-propyl, 1-n-butyl, 2-n-butyl, iso-butyl, tert-butyl, n-pentyl, iso-pentyl, neo-pentyl, 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 2,2,2-trimethylphenyl radical; nonyl radicals such as the n

Affiliated with

Also associated with

Rating

Polishes comprising aminoorganopolysiloxanes containing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polishes comprising aminoorganopolysiloxanes containing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polishes comprising aminoorganopolysiloxanes containing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2822576