Thermoplastic resins with a low proportion of coarse particles

Details Thermoplastic resins with a low proportion of coarse particles Thermoplastic resins with a low proportion of coarse particles

2001-05-03

2004-09-28

Seidleck, James J. (Department: 1711)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S317000, C525S322000, C525S324000, C525S064000, C525S071000, C525S090000, C524S504000

Reexamination Certificate

active

06797784

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to homo- and/or co-polymers and to thermoplastic moulding compositions having improved mechanical properties, and to the use thereof.
BACKGROUND OF THE INVENTION
Thermoplastic moulding compositions, especially those containing homo- and/or co-polymers of one or more ethylenically unsaturated monomers, polycarbonates and polyesters, are known from a large number of publications. This is true especially of the use of ABS polymers. Reference is made to the following documents solely by way of example: DE-A-196 16 968, WO 97/40 092, EP-A-728 811, EP-A-315 868 (=U.S. Pat. No. 4,937,285), EP-A-0 174 493 (U.S. Pat. No. 4,983,658), U.S. Pat. No. 5,030,675, JA-59 202 240, EP-A-0 363 608 (=U.S. Pat. No. 5,204,394), EP-A-0 767 204, EP-A-0 611 798, WO 96/27 600, EP-A-0 754 531.
It is known from the prior art to filter polymer lattices in order to remove impurities or coarse portions. For example, Houben Weyl XIV/1, Makromolekulare Stoffe 1, pages 348 to 356 (Georg Thieme Verlag, Stuttgart, 1961) and DE-A-4 126 483 and U.S. Pat. No. 4,747,959 describe the filtration of rubber lattices. Connections with the mechanical properties are not known from that prior art.
Thermoplastic moulding compositions having a particle diameter of from 0.20 to 0.35 &mgr;m are known from EP-A-0 704 488. A connection with elongation at tear, thermostability, natural shade and notched bar impact strength is not to be found in that prior art.
SUMMARY OF THE INVENTION
Accordingly, the object of the present invention is to make available homo- and/or co-polymers which are distinguished by improved mechanical properties, especially in respect of elongation at tear, thermostability, natural shade and notched bar impact strength, and by an especially consistent product quality.
That object is achieved by homo- and/or copolymers of one or more ethylenically unsaturated monomers (“vinyl monomers”) selected from the group of the mono- or poly-unsaturated olefins, such as ethylene, propylene, chloroprene, 1,3-butadiene, isopropene, vinyl acetate, styrene, &agr;-methylstyrene, styrenes substituted at the nucleus, vinyl cyanides, such as acrylonitrile, methacrylonitrile, maleic anhydride, N-substituted maleimides, C
1
-C
8
-alkyl acrylates and methacrylates, such as methyl acrylate and methyl methacrylate, which contain ≦100 ppm of coarse portions having mean particle diameters of from 200 to 500 &mgr;m. Special preference is given to coarse portions in amounts of ≦50 ppm, especially ≦10 ppm.


REFERENCES:
patent: 3509238 (1970-04-01), Aubrey et al.
patent: 3919353 (1975-11-01), Castelnuovo et al.
patent: 3928494 (1975-12-01), Allberti
patent: 3969431 (1976-07-01), Gallagher
patent: 4336210 (1982-06-01), McClain
patent: 4426499 (1984-01-01), Korte et al.
patent: 4747959 (1988-05-01), Ho et al.
patent: 4937285 (1990-06-01), Wittmann et al.
patent: 4983658 (1991-01-01), Kress et al.
patent: 5030675 (1991-07-01), Wittmann et al.
patent: 5204394 (1993-04-01), Gosens et al.
patent: 5242596 (1993-09-01), Bachem et al.
patent: 5455292 (1995-10-01), Kakegawa et al.
patent: 5552465 (1996-09-01), Witmann et al.
patent: 5679759 (1997-10-01), Wittmann et al.
patent: 5961915 (1999-10-01), Toyouchi et al.
patent: 6020081 (2000-02-01), Raith et al.
patent: 6060583 (2000-05-01), Raith et al.
patent: 6083428 (2000-07-01), Ueda et al.
patent: 6093759 (2000-07-01), Gareiss et al.
patent: 0 535 908 (1993-04-01), None
patent: 0 634 445 (1995-01-01), None
patent: 0 728 811 (1996-08-01), None
patent: 0 767 204 (1997-04-01), None
patent: 59-202240 (1984-11-01), None
Houben Weyl XIV/1, Makromolekulare Stoffe 1, pp. 348-356, (Georg Thieme Verlag Stuttgart) (month unavailable) 1961, H. Logemann u.a.: Allgemeines zur Polymersation in heterogener Phase.
**Lorenz et al: “bestimmung der tellchengrö&bgr;enverteilung wä&bgr;riger polymerdispersionen”, Kautschuk und Gummi—Kunststoffe., Bd. 42, Nr. 12, 1989, Selten 1101-1106, XP002133882, Dr. Alfred Huthig Verlag GMBH. Heidelberg., DE.
**Elisseeva, Ivanchev, Kuchanov, Lebedev: “emulsion polymerization”, Consultants Bureau, New York US XP002133883, Seite 114-Seite 122, 1982.
**Ham: “venyl polymerization ii” 1969, Marcel Dekker, New York US XP002133884, Seite 103—113.

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