Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1999-01-25
2000-05-16
Warzel, Mark L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
525 67, 525 71, 525 84, 525 86, C08L 5104
Patent
active
060638540
DESCRIPTION:
BRIEF SUMMARY
The invention relates to moldings for sanitary and bathroom fittings, and also to fastening parts for these. In particular, the invention relates to moldings with good dimensional stability together with good chemicals resistance and high scratch resistance.
Various polymeric materials have hitherto been used for producing moldings for sanitary and bathroom fittings, such as shower trays or bathtubs.
Use is made, for example, of ABS (acrylonitrile-butadiene-styrene copolymer) and HIPS (high-impact polystyrene: impact-modified polystyrene). The chemicals resistance, scratch resistance and yellowing resistance of both of these materials are not adequate for every application.
Polypropylene (PP) has low hardness and a toughness/stiffness ratio which is not always adequate.
PMMA (polymethyl methacrylate) has insufficient chemicals resistance and low toughness.
It is an object of the invention to provide moldings for sanitary and bathroom fittings which have good dimensional stability, good chemicals resistance and high scratch resistance. Another object of the invention is to provide moldings for sanitary and bathroom fittings which have a balanced toughness/stiffness ratio and good stability. Another object of the invention is to provide moldings for sanitary and bathroom fittings which are very substantially free of weld lines.
We have found that this object is achieved by using a thermoplastic molding composition differing from ABS and comprising, based on a total of 100% by weight of amounts of components A and B, and, if desired, C and/or D, polymer with a glass transition temperature of below 0.degree. C. and with a median particle size of from 50 to 1000 nm, partly crystalline polymer, fillers or mixtures of these
The moldings for sanitary and bathroom fittings described are scratch-resistant, stable and resistant to chemicals, and have very good dimensional stability.
The thermoplastic molding compositions used according to the invention for producing the novel moldings are known per se. Molding compositions which can be used according to the invention are described, for example, in DE-A-12 60 135, DE-C-19 11 882, DE-A-28 26 925, DE-A-31 49 358, DE-A-32 27 555 and DE-A-40 11 162.
In one embodiment, the molding compositions differing from ABS and used according to the invention for producing the novel moldings comprise the components listed below: A and B, and, if desired, C and/or D, as defined further below. Based on amounts of components A and B, and if desired, C and/or D, which give 100% in total, they comprise weight, in particular from 25 to 50% by weight, of a particulate emulsion polymer with a glass transition temperature of below 0.degree. C. and with a median particle size of from 50 to 1000 nm, preferably from 50 to 500 nm weight, in particular from 50 to 75% by weight, of at least one amorphous or partly crystalline polymer, fillers or mixtures of these.
The invention is described in more detail below.
The molding compositions used for producing the novel moldings are firstly described together with the components of which these compositions are composed.
Component A
Component A is a particulate emulsion polymer with a glass transition temperature of below 0.degree. C. and with a median particle size of from 50 to 1000 nm.
Component A is preferably a graft copolymer made from particular from 55 to 65% by weight, of a particulate graft base A1 with a glass transition temperature of below 0.degree.C., particular from 35 to 45% by weight, of a graft A2 made from the monomers, based on A2, by weight, of units of a vinylaromatic monomer, preferably of styrene, of a substituted styrene or of a (meth)acrylate or mixtures of these, in particular of styrene and/or of .alpha.-methylstyrene, and weight, of units of an ethylenically unsaturated monomer, preferably of acrylonitrile or methacrylonitrile, in particular of acrylonitrile.
The graft A2 here is composed of at least one graft shell, and the overall graft copolymer A has a median particle size of from 50 to 1000 nm.
In one embodiment of the
REFERENCES:
patent: 4914144 (1990-04-01), Muehlbach et al.
patent: 5569700 (1996-10-01), Iwakiri et al.
Bernstorff Bernd-Steffen von
Brandstetter Franz
Endemann Ulrich
Mc Kee Graham Edmund
Naarmann Herbert
BASF - Aktiengesellschaft
Warzel Mark L.
LandOfFree
Moldings for sanitary and bathroom fittings does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Moldings for sanitary and bathroom fittings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Moldings for sanitary and bathroom fittings will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-259576