Flame resistant thermostable polycarbonate ABS moulding...

Details Flame resistant thermostable polycarbonate ABS moulding... Flame resistant thermostable polycarbonate ABS moulding...

2001-05-16

2003-06-24

Szekely, Peter (Department: 1714)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S126000, C524S128000

Reexamination Certificate

active

06583204

ABSTRACT:

The present invention relates to polycarbonate-ABS moulding compositions which have been given a flame-resistant treatment with phosphorus compounds and have an excellent profile of mechanical properties, a high heat distortion point and good processing properties,
U.S. Pat. No. 5,061,745 describes moulding compositions of aromatic polycarbonate, graft polymer and monophosphate. Although these mixtures show good flow properties, the heat distortion point is often inadequate because of the high plasticizing effect of the monophosphates.
EP-A-0 640 655 describes moulding compositions of aromatic polycarbonate, styrene-containing copolymers and graft polymers which can be given a flame-resistant treatment with monomeric and/or oligomeric phosphorus compounds. Due to the presence of the monomeric phosphates, the required heat distortion point level often cannot be achieved.
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 flameproofing agents in thermoplastic resins, a large number of thermoplastic resins being listed. EP-A-0363608 describes flame-resistant polymer mixtures of aromatic polycarbonate, styrene-containing copolymer or graft copolymer and oligomeric phosphates as flameproofing additives. For some applications, such as, for example, mouldings inside components of housings, the heat distortion point of these mixtures is often inadequate.
The object of the present invention is therefore to prepare flame-resistant polycarbonate-ABS moulding compositions which have an excellent heat distortion point, in addition to good processing properties. With this combination of properties, the materials are particularly suitable for housings in current-conducting components, since high exposure to heat is to be expected in this case.
It has now been found, surprisingly, that flame-resistant moulding compositions which give shaped articles with a very good profile of mechanical properties and an outstanding heat distortion point, coupled with good processing properties, are obtained by using the phosphorus compounds according to the invention, which are distinguished in their structure by different structural units.
The present invention relates to thermoplastic moulding compositions comprising at least 2 components chosen from the group consisting of 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., thermoplastic vinyl (co)polymer and polyalkylene terephthalate and 0.5 to 20 parts by wt. phosphorus compound of the general formula (I)
wherein
X and Y represent a mono- or polynuclear aromatic radical having 6 to 30 C atoms and X and Y differ from one another,
R
1
, R
2
, R
3
, R
4
and R
5
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,
z denotes 0.05 to 0.95, preferably 0.15 to 0.85,
n independently of one another denote 0 or 1, preferably 1, and
N denotes 0.5 to 30.
The present invention preferably relates to flame-resistant thermoplastic moulding compositions comprising
A) 5 to 95, preferably 10 to 90 parts by wt., particularly preferably 20 to 80 parts by wt. aromatic polycarbonate and/or polyester-carbonate
B) 1 to 60, preferably 1 to 40 parts by wt., particularly preferably 2 to 30 parts by wt. of at least one graft polymer of
B. 1 5 to 95, preferably 20 to 60 wt. % of one or more vinyl monomers on
B.2 5 to 95, 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, preferably 1 to 30, particularly preferably 2 to 25 parts by wt. thermoplastic vinyl (co)polymer and/or thermoplastic polyalkylene terephthalate
D) 0.5 to 20 parts by wt., preferably 1 to 18 parts by wt., particularly preferably 2 to 15 parts by wt. of at least one phosphorus compound of the general formula (I)
 wherein
X and Y represent a mono- or polynuclear aromatic radical having 6 to 30 C atoms and X and Y differ from one another,
R
1
, R
2
, R
3
, R
4
and R
5
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,
z denotes 0.05 to 0.95, preferably 0.15 to 0.85,
n independently of one another denote 0 or 1, preferably 1, and N denotes 0.5 to 30
E) 0.05 to 5 parts by wt., preferably 0.1 to 1 part by wt., particularly preferably 0.1 to 0.5 part by wt. fluorinated polyolefin.
Component A
Aromatic polycarbonates and/or aromatic polyester-carbonates according to component A which are suitable according to the invention are known from the literature or can be prepared by processes known from the literature (for the preparation of aromatic polycarbonates see, for example, Schnell, “Chemistry and Physics of Polycarbonates”, Interscience Publishers, 1964 and DE-AS 1 495 626, DE-OS 2 232 877, DE-OS 2 703 376, DE-OS 2 714 544, DE-OS 3 000 610 and DE-OS 3 832 396; for the preparation of aromatic polyester-carbonates e.g. DE-OS 3 077 934).
Aromatic polycarbonates are prepared e.g. by reaction of diphenols with carbonic acid halides, preferably phosgene, and/or with aromatic dicarboxylic acid dihalides, preferably benzenedicarboxylic acid dihalides, by the phase boundary process, optionally using chain stoppers, for example monophenols, and optionally using branching agents which are trifunctional or more than trifunctional, for example triphenols or tetraphenols.
Diphenols for the preparation of the aromatic polycarbonates and/or aromatic polyester-carbonates are preferably those of the formula (II)
wherein
A
1
is 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 can be fused 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 are 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 or phenyl-C
1
-C
4
-alkyl, preferably benzyl,
x in each case independently of one another are 0, 1 or 2,
p is 1 or 0 and
R
6
and R
7
can 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 denotes 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
simultaneously are alkyl.
Preferred diphenols are hydroquinone, resorcinol, 4,4′-dihydroxydiphenyl, bis-(hydroxyphenyl)-C
5
-C
6
-alkanes, bis-(hydroxyphenyl)-C
1
-C
6
-cycloalkanes, bis-(hydroxyphenyl)ethers, bis-(hydroxyphenyl)sulfoxides, bis-(hydroxyphenyl)ketones, bis(hydroxyphenyl)sulfones and &agr;,&agr;-bis-(hydroxyphenyl)-diisopropyl-benzenes and derivatives thereof brominated on the nucleus and/or chlorinated on the nucleus.
Particularly preferred diphenols are 4,4′-diphenylphenol, bisphenol A, 2,4-bis-(4-hydroxyphenyl)-2-methylbutane, 1,1-bis-(4-hydroxyphenyl)-cyclohexane, 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 4,4′-dihydroxydiphenyl sulfide, 4,4′-dihydroxydiphenyl sulfone and di- and tetrabrominated or -chlorinated derivatives thereof, such as, for example, 2,2-bis-(3-chloro-4-hydroxyphenyl)-propane, 2,2-bis-(3,5-dichloro-4-hydroxyphenyl)-propane or 2,2-bis-(3,5-dibromo-4-hydroxyphenyl)-propane.
2,2-Bis-(4-hydroxyphenyl)-propane (bisphenol A) is particularly preferred.
The diphenols can be employed individually or as any desired mixtures.
The diphenols are known from the literature or obtainable by processes known from the literature.
Examples of chain stoppers which are suitable for the prepa

Affiliated with

Also associated with

Rating

Flame resistant thermostable polycarbonate ABS moulding... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flame resistant thermostable polycarbonate ABS moulding..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flame resistant thermostable polycarbonate ABS moulding... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3104373