Mineral filled moulding compounds based on...

Details Mineral filled moulding compounds based on... Mineral filled moulding compounds based on...

1996-07-29

2001-07-31

Short, Patricia A. (Department: 1712)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S126000, C524S127000, C524S141000, C524S143000, C524S424000, C524S425000, C524S504000, C524S513000, C524S605000

Reexamination Certificate

active

06268418

ABSTRACT:

The invention relates to thermoplastic moulding compounds based on polyalkyleneterephthalate, an oligomeric phosphorus compound, mineral fillers and optionally an aromatic polycarbonate and/or a graft polymer.
As is known, for example, from WO 92/11314, a high flame-proofing effect is achieved by using resorcinol diphosphate in a polymer blend consisting of PBT/aromatic polycarbonate or PBT/polyetherimide.
Furthermore, EP-A 264 143 describes hindering the formation of agglomerates in aromatic polyesters by adding diphosphates. DE-OS 2 509 592 and JP 58-76447 describe polyester compositions which contain organic diphosphates.
The present invention provides a thermoplastic moulding compound based on polyalkyeneterephthalate, wherein the moulded bodies or moulded items obtainable therefrom are distinguished by high toughness and extensibility.
It was found that high toughness, with simultaneous good flow behaviour and good other properties, without damaging the thermoplastic matrix, is produced with a mineral-filled polyalkyleneterephthalate to which is added resorcinol diphosphate.
The present invention provides thermoplastic moulding compounds containing
A) 30 to 98.9 parts by wt. of polyalkyleneterephthalate
B) 0 to 50 parts by wt. of polycarbonate
C) 0 to 30 parts by wt. of a graft polymer
D) 0.1 to 20 parts by wt. of an oligomeric phosphorus compound of the formula (Ia)
in which
R
1
, R
2
, R
3
, R
4
, independently of each other, represent a C
1
-C
8
-alkyl, C
5
-C
6
-cycloalkyl, C
6
-C
10
-aryl or C
7
-C
12
-aralkyl group,
n may be 0 or 1, irrespective of the position,
N is an average number from 0.5 to 5 and
X represents a mono or polynuclear aromatic group with 6 to 30 carbon atoms,
or 0.1 to 20 parts by weight of a mixture of an oligomeric phosphorus compound of the formula (Ia) and a phosphorus compound of the formula (Ib)
in which
R
5
is methyl and
m is a number of 0 to 5,
where the amount of phosphorus compound of the formula (Ib) in the mixture of phosphorus compounds is 1 to 50% by weight, preferably 3 to 45% by weight and in particular 5 to 40% by weight (relative to 100% by weight of phosphorus compound of the formulae (Ia) and (Ib).
E1) 1 to 60 parts by wt. of mineral filler and
E2) 0 to 30 parts by wt. of fillers and reinforcing materials which differ from E1).
In the event that the thermoplastic moulding compounds contain the components A), B), D) and E), the following compositions are preferred:
A) 30 to 92, in particular 65 to 90 parts by wt. of polyalkyleneterephthalate,
B) 1 to 50, in particular 5 to 30 parts by wt. of polycarbonate,
D) 1 to 20, in particular 3 to 15 parts by wt. of an oligomeric phosphorus compound of the formula (Ia) or a mixture of phosphorus compounds of the formulae (Ia) and (Ib),
E1) 1 to 60, in particular 3 to 55, and quite specifically 20 to 55 parts by wt. of mineral filler and optionally
E2) 1 to 20, in particular 5 to 15 parts by wt. of fillers and reinforcing materials which differ from E1).
In the event that the thermoplastic moulding compounds contain the components A), D) and E), the following compositions are preferred:
A) 20 to 96, in particular 40 to 55 parts by wt. of polyalkyleneterephthalate,
D) 3 to 20, in particular 5 to 15 parts by wt. of an oligomeric phosphorus compound of the formula (Ia) or a mixture of phosphorus compounds of the formulae (Ia) or (Ib),
E1) 1 to 60, in particular 25 to 55 parts by wt. of mineral filler and optionally
E2) 1 to 20, in particular 5 to 15 parts by wt. of fillers and reinforcing materials which differ from E1).
In the event that the thermoplastic moulding compounds contain the components A), B), C), D) and E), the following compositions are preferred:
A) 30 to 97, in particular 42 to 90 parts by wt. of polyalkyleneterephthalate,
B) 1 to 50, in particular 5 to 30 parts by wt. of polycarbonate,
C) 5 to 30, in particular 5 to 25 parts by wt. of a graft polymer,
D) 1 to 20, in particular 3 to 15 parts by wt. of an oligomeric phosphorus compound of the formula (Ia) or a mixture of phosphorus compounds of the formulae (Ia) and (Ib),
E1) 1 to 60, in particular 3 to 55 parts by wt. and optionally
E2) 5 to 20, in particular 5 to 15 parts by wt. of fillers and reinforcing materials which differ from E1).
Component A
Polyalkyleneterephthalates in the sense of the invention are reaction products of aromatic dicarboxylic acids or their reactive derivatives (e.g. dimethyl esters or anhydrides) and aliphatic, cycloaliphatic or araliphatic diols and mixtures of these reaction products.
Preferred polyalkyleneterephthalates can be prepared from terephthalic acid (or its reactive derivatives) and aliphatic or cycloaliphatic diols with 2 to 10 carbon atoms by known methods (Kunststoff-Handbuch, vol. VIII, p. 695 et seq., Karl-Hanser Verlag, Munich, 1973).
Preferred polyalkyleneterephthalates contain at least 80, preferably 90 mol-%, with respect to the dicarboxylic acid component, of terephthalic acid groups and at least 80, preferably at least 90 mol-%, with respect to the diol component, of ethylene glycol and/or butanediol-1,4 groups.
The preferred polyalkyleneterephthalates may contain, in addition to terephthalic acid groups, up to 20 mol-% of groups from other aromatic dicarboxylic acids with 8 to 14 carbon atoms or aliphatic dicarboxylic acids with 4 to 12 carbon atoms, such as groups from phthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4′-di-phenyl-dicarboxylic acid, succinic, adipic, sebacic, azelaic acids or cyclohexanediacetic acid.
The preferred polyalkyleneterephthalates may contain, in addition to ethylene glycol or butanediol-1,4-groups, up to 20 mol-% of other aliphatic diols with 3 to 12 carbon atoms or cylcoaliphatic diols with 6 to 21 carbon atoms, e.g. groups from propanediol-1,3, 2-ethylpropanediol-1,3, neopentyl glycol, pentanediol-1,5, hexanediol-1,6, cyclohexane-dimethanol-1,4, 3-methylpentanediol-2,4, 2-methyl-pentanediol-2,4, 2,2,4-trimethylpentanediol-1,3, and -1,6, 2-ethylhexanediol-1,3, 2,2-diethylpropanediol-1,3, hexanediol-2,5, 1,4-di-(&bgr;-hydroxyethoxy)-benzene, 2,2-bis-(4-hydroxycyclohexyl)-propane, 2,4-dihydroxy-1,1,3,3-tetra-methyl-cyclobutane, 2,2-bis-(3-&bgr;-hydroxyethoxyphenyl)-propane and 2,2-bis- (4-hydroxypropoxyphenyl) -propane (DE-OS 24 07 674, 24 07 776, 27 15 932).
The polyalkyleneterephthalates may be branched by incorporating relatively small amounts of 3- or 4-hydric alcohols or 3- or 4-basic carboxylic acids, such as are described, for example, in DE-OS 19 00 270 and U.S. Pat. No. 3 692 744. Examples of preferred branching agents comprise trimesic acid, trimellitic acid, trimethylol-ethane and -propane and pentaerythritol.
It is recommended that not more than 1 mol-% of branching agent, with respect to the acid component, be used.
Polyalkyleneterephthalates which have been prepared solely from terephthalic acid and its reactive derivatives (e.g. its dialkyl etsers) and ethylene glycol and/or butanediol-1,4 (polyethyleneterephthalate and polybutyleneterephthalate) and mixtures of these polyalkyleneterephthalates are particularly preferred.
Copolyesters which are prepared from at least two of the acid components mentioned above and/or at least two of the alcohol components mentioned above are also preferred polyalkylene-terephthalates, poly(ethylene glycol/butanediol-1,4) -terephthalates being particularly preferred copolyesters.
Polyalkyleneterephthalates preferably used as component A generally have an intrinsic viscosity of ca. 0.4 to 1.5 dl/g, preferably 0.5 to 1.3 dl/g, each measured in phenol/o-dichlorobenzene (1:1 by wt.) at 25° C.
Component B
Suitable thermoplastic aromatic polycarbonates in accordance with component B according to the invention are those based on diphenols of the formula (II)
in which
A is a single bond, a C
1
-C
5
-alkylene, C
2
-C
5
-alkylidene or C
5
-C
6
-cycloalkylidene group, —S—or —SO
2—,
B is chlorine or bromine,
x is 0, 1 or 2 and
p is 1 or 0,
or alkyl-substituted dihydroxyphenylcycloalkanes of the formula (III),
in which
R
1
and R
2
, independently of each other, represent hydrogen,

Affiliated with

Also associated with

Rating

Mineral filled moulding compounds based on... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mineral filled moulding compounds based on..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mineral filled moulding compounds based on... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2562562