Surface-modified filler composition

Details Surface-modified filler composition Surface-modified filler composition

1997-08-25

1998-10-27

Yoon, Tae

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523200, 523210, 524430, 524436, 524437, 106 17, 106 1811, 428403, 428405, C08K 904, C08K 906, C08K 322

Patent

active

058279067

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a surface-modified filler composition, to the use thereof for flameproofing polymers, and to the resultant flameproofed polymers.
2. Background Art
It has been known for some time to coat halogen-free, flame-inhibiting fillers, such as, for example, magnesium hydroxide or aluminium hydroxide, on the surface in order to optimize incorporation into polymers. This has been achieved, for example, with salts of fatty acids as described in German Patent No. 2,659,933 or, for example, with polymers containing acid groups as described in European Published Patent Application No. 292 233. The essential prerequisite for these surface coatings was generally a high-grade filler material having a precisely defined property profile (German Patent No. 2,659,933). Owing to their relatively high price, such high-grade filler materials have only been suitable, in the main, for special applications, although there is also a considerable demand for high-grade halogen-free, flame-inhibiting fillers even for classical applications, for example for cable compositions.


BRIEF DESCRIPTION OF THE INVENTION

The object was consequently to modify filler compositions in such a way that even qualitatively lower-grade and thus cheaper fillers can be used to achieve optimum properties in the plastic.
The object has been achieved by means of the surface-modified filler compositions of the invention.
The halogen-free, flame-inhibiting fillers employed are hydroxides of aluminium and/or hydroxides of magnesium, optionally mixed with oxides of aluminium, of magnesium, of titanium or of zirconium, or with further filler materials, for example calcium carbonate, talc or calcined or uncalcined clays.
Examples of suitable hydroxides of aluminium are natural Al(OH).sub.3 -containing materials, for example hydrargillite or gibbsite, (AlO(OH).sub.X)-containing materials, for example boehmite, or synthetic aluminium hydroxides, as marketed by Martinswerk GmbH in Bergheim under the trade name Martifin.RTM. or Martinal.RTM..
Examples of suitable hydroxides of magnesium are natural Mg(OH).sub.2 materials, for example brucite or seawater grades, natural magnesium hydroxycarbonates, for example dawsonite, huntite or hydromagnesite, or synthetic magnesium hydroxides, as marketed, for example, by Magnifin GmbH in Bergheim under the trade name Magnifin.RTM..
Suitable oxides of aluminium, of magnesium, of titanium or of zirconium are the commercially available oxides. Depending on the requisite property profile in the plastic, a hydroxide of aluminium and/or a hydroxide of magnesium can be employed alone or in any desired mixing ratios with said oxides.
In accordance with the invention, the surface modification of the halogen-free, flame-inhibiting filler is carried out in variant a) using a fatty acid derivative from the series consisting of polymeric fatty acids, keto fatty acids, fatty alkyl oxazolines and fatty alkyl bisoxazolines, and optionally a siloxane derivative, or in variant b) by means of a fatty acid and a siloxane derivative.
The term polymeric fatty acids is taken to mean compounds prepared by oligomerization, for example by dimerization or trimerization, of corresponding fatty acids. Examples of suitable representatives are polystearic acid, polylauric acid and polydecanoic acid (Henkel Report 28, 1992, pp. 39 if.).
The term keto fatty acids is taken to mean fatty acids having 10 to 30 carbon atoms which contain keto groups. The preferred representative of a keto fatty acid is ketostearic acid (Henkel Report 28, 1992, pp. 34 ff.).
The term fatty alkyloxazolines is taken to mean oxazolines which are 2-substituted by alkyl or hydroxyalkyl. The alkyl group expediently has 7 to 21 carbon atoms. The bisoxazolines are compounds synthesized from the hydroxyalkyloxazolines by reaction with diisocyanates. An example of a preferred representative is undecyl-2-oxazoline (Henkel Report 28, 1992, pp. 43 ff.).
These fatty acid derivatives are employed either individually or i

REFERENCES:
patent: 4098762 (1978-07-01), Miyata et al.
patent: 4145404 (1979-03-01), Miyata et al.
patent: 4415689 (1983-11-01), Minagawa et al.
patent: 4698379 (1987-10-01), Nakaya et al.
patent: 5039718 (1991-08-01), Ashley et al.
patent: 5139875 (1992-08-01), Metzemacher et al.

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