Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2001-12-03
2004-03-30
Sanders, Kriellion A. (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C524S145000
Reexamination Certificate
active
06713544
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to polycarbonate compositions that have been rendered flame-resistant with phosphorus compounds, that have an excellent mechanical property spectrum, a good heat resistance, an improved flame-proofing effect and improved flow behavior (processing behavior).
SUMMARY OF THE INVENTION
Compositions containing:
I. at least two components selected from the group comprising aromatic poly(ester) carbonates, graft polymers of one or more vinyl monomers on one or more graft bases having a glass transition temperature of <10° C., a thermoplastic vinyl (co)polymer, or poly(alkylene terephthalate) as well as
II. 0.5 to 25 parts by weight of a mixture of phosphorus compounds of the general formula (I)
with the proviso that the composition contains at least 2 phosphorus compounds of the formula (I) in which X or one or more radicals R
1
, R
2
, R
3
and R
4
is/are different.
BACKGROUND OF THE INVENTION
U.S. Pat. No. 5,061,745 describes molding compositions of an aromatic polycarbonate, graft polymer and monophosphate. Although these mixtures exhibit a good flow behavior and a good flame-proofing effect, nevertheless they often do not have the required high degree of heat resistance. Moreover, on account of their volatility, monophosphates do not meet specific processing conditions for the formation of an effective coating.
In EP-A 0 640 655 molding compositions of aromatic polycarbonate, styrene-containing copolymers and graft polymers are described that may be rendered flame-resistant with monomeric and/or oligomeric phosphorus compounds. The aforementioned disadvantages may arise on account of the content of monomeric phosphorus compounds.
EP-A 747 424 describes the use of a combination of phosphate having a molecular weight of approximately 500 to 2,000 and phosphate having a molecular weight of approximately 2,300 to 11,000 as flame-proofing agent in thermoplastic resins, a large number of thermoplastic resins being listed. On account of the high molecular weight of the flame-proofing agents deficiencies in the flame-proofing effect can be expected.
In EP-A-0363608 flame-resistant polymer mixtures are described, consisting of aromatic polycarbonate, styrene-containing copolymer or graft copolymer as well as an oligomeric phosphate as flame-proofing additive, wherein frequently the required property combination of a good flame-proofing effect and good processing behavior is not achieved.
The object of the present invention is accordingly to provide polycarbonate compositions that have an improved flame-proofing effect, a high heat resistance, and improved flow behavior (processing behavior) as well as good mechanical properties.
It has now surprisingly been found that by the use of mixtures of oligophosphates with various structures, molding compositions/molded articles can be obtained that have the desired property profile.
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides compositions containing:
I. at least two components selected from the group comprising aromatic poly(ester) carbonates, graft polymers of one or more vinyl monomers on one or more graft bases having a glass transition temperature of <10° C., and thermoplastic vinyl (co)polymer, as well as
II. 0.5 to 25 parts by weight of a mixture of phosphorus compounds of the general formula (I)
wherein
X denotes a mononuclear or polynuclear aromatic radical with 6 to 30
C atoms,
R
1
, R
2
, R
3
and R
4
independently of one another denote optionally halogenated C
1
-C
8
alkyl, or C
5
-C
6
cycloalkyl, C
6
-C
20
aryl or C
7
-C
12
aralkyl in each case optionally substituted by halogen and/or C
1
-C
4
alkyl,
n independently of one another denotes 0 or 1, preferably 1,
q denotes 0.5 to 30,
with the proviso that the composition contains at least 2 phosphorus compounds of the formula (I) in which X or one or more radicals R
1
, R
2
, R
3
and R
4
are different and wherein the sum of the parts by weight of the components is 100.
The present invention preferably provides compositions containing:
A) 5 to 95 parts by weight, preferably 10 to 90 parts by weight, particularly preferably 20 to 80 parts by weight of aromatic polycarbonate and/or polyester carbonate
B) 1 to 60 parts by weight, preferably 1 to 40 parts by weight, particularly preferably 2 to 30 parts by weight, of at least one graft polymer of
B.1 5 to 95 wt. %, preferably 20 to 60 wt. % of one or more vinyl monomers on
B.2 5 to 95 wt. %, preferably 40 to 80 wt. % of one or more graft bases having a glass transition temperature of <10° C., preferably 0° C., particularly preferably <−20° C.,
C) 0 to 50 parts by weight, preferably 1 to 30 parts by weight, particularly preferably 2 to 25 parts by weight of thermoplastic vinyl (co)polymer and/or thermoplastic poly(alkylene terephthalate)
D) 0.5 to 25 parts by weight, preferably 1 to 18 parts by weight, particularly preferably 2 to 15 parts by weight of a phosphorus compound of the general formula (I)
wherein
X denotes a mononuclear or polynuclear aromatic radical with 6 to 30 C atoms,
R
1
, R
2
, R
3
and R
4
independently of one another denote optionally halogenated C
1
-C
8
alkyl, or C
5
-C
6
cycloalkyl, C
6
-C
20
aryl or C
7
-C
12
aralkyl in each case optionally substituted by halogen and/or C
1
-C
4
alkyl,
n independently of one another denotes 0 or 1, preferably 1,
q denotes 1 to 30,
E) 0.05 to 5 parts by weight, preferably 0.1 to 1 part by weight, particularly preferably 0.1 to 0.5 part by weight of fluorinated polyolefin
with the proviso that the composition contains at least 2 phosphorus compounds of the formula (I) in which X or one or more radicals R
1
, R
2
, R
3
and R
4
are different and wherein the sum of the parts by weight is 100.
Component A
Suitable aromatic polycarbonates and/or aromatic polyester carbonates of component A according to the invention are known in the literature or can be produced by methods known in the literature (for the production of aromatic polycarbonates see for example Schnell, “Chemistry and Physics of Polycarbonates”, Interscience Publishers, 1964, as well as DE-AS 1 495 626, DE-OS 2 232 877, DE-A 2 703 376, DE-A 2 714 544, DE-A 3 000 610, DE-A 3 832 396; for the production of aromatic polyester carbonates see for example DE-A 3 077 934).
The production of aromatic polycarbonates is carried out for example by reacting diphenols with carbonic acid halides, preferably phosgene and/or with aromatic dicarboxylic acid dihalides, preferably benzenedicarboxylic acid dihalides, by the phase boundary process, optionally with the use of chain terminators, for example monophenols, and optionally with the use of trifunctional or more than trifunctional branching agents, for example triphenols or tetraphenols.
Diphenols for the production of the aromatic polycarbonates and/or aromatic polyester carbonates are preferably those of the formula (II)
wherein
A
1
denotes a single bond, C
1
-C
5
alkylene, C
2
-C
5
alkylidene, C
5
-C
6
cycloalkylidene, —O—, —SO—, —CO—, —S—, —SO
2
—, C
6
-C
12
arylene, which may be condensed with further aromatic rings optionally containing heteroatoms, or a radical of the formula
or a radical of the formula (IV)
B independently of one another denotes C
1
-C
8
alkyl, preferably C
1
-C
4
alkyl, in particular methyl, halogen, preferably chlorine and/or bromine, C
6
-C
10
aryl, preferably phenyl, C
7
-C
12
aralkyl, phenyl-C
1
-C
4
-alkyl, preferably benzyl
x is in each case independently of one another 0, 1 or 2,
p is 1 or 0, and
R
6
and R
7
may be chosen individually for each Z, and independently of one another denote hydrogen or C
1
-C
6
alkyl, preferably hydrogen, methyl and/or ethyl,
Z denotes carbon, and
m is an integer from 4 to 7, preferably 4 or 5,
with the proviso that on at least one atom Z R
6
and R
7
are both simultaneously alkyl.
Preferred diphenols are hydroquinone, resorcinol, 4,4′-dihydroxydiphenyl, bis-(hydroxyphenyl)-C
1
-C
5
-alkanes, bis-(hydroxyphenyl)-C
5
-C
6
-cycloalkanes, bis-(hydroxyphenyl)-ethers, bis-(hydroxyphenyl)-sulfo
Eckel Thomas
Peucker Uwe
Seidel Andreas
Wittmann Dieter
Bayer Aktiengesellschaft
Gil Joseph C.
Preis Aron
Sanders Kriellion A.
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