Cleaning compositions for solid surfaces – auxiliary compositions – Auxiliary compositions for cleaning – or processes of preparing – Detergent builder composition
Patent
1996-12-11
1998-10-13
Hertzog, Ardith
Cleaning compositions for solid surfaces, auxiliary compositions
Auxiliary compositions for cleaning, or processes of preparing
Detergent builder composition
510349, 510356, 510360, 510438, 510441, 510443, 510444, 510505, 510506, 510507, 510511, 510532, C11D 312, C11D 1002, C11D 1100, C11D 1706
Patent
active
058212078
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method for producing fine solid builder particle having improved performance as a builder, a builder composition and a detergent composition containing the fine solid builder particle, and a method for producing the above detergent composition.
BACKGROUND ART
Solid builders typically exemplified by zeolites have been most generally used as calcium ion capturing agents for use in detergents today.
Zeolites, when used as solid builders, are likely to be precipitated in washing tubs and drain pipes due to the insolubility in water, so that much attention has to be paid to their dispersibility. Therefore, studies have been so far made to improve the dispersibility by making the solid builder particles fine. Nowadays, the most widely used zeolite is ZEOLITE-A which is produced to have a primary particle size of about 3 .mu.m. There are substantially no practical problems in water dispersibility of builders by adjusting the particle size of the primary particles to about 3 .mu.m (though the particle size of aggregates thereof being somewhat larger). As mentioned above, in the prior art, it has been studied how to make the solid builder particles fine in order to improve their dispersibility, and it has reached a level with substantially no practical problems. On the other hand, it has been known that a cation exchange speed and a specific surface area are correlated, and from this viewpoint further studies have been made for producing finer particles.
However, in the prior art, when attempts are to be made to further make the solid builder particles fine in order to improve their calcium ion capturing ability, crystallization of the solid builders become difficult. Therefore, since the solid builders have to be kept under strict control, the production costs become expensive. Moreover, the obtained primary particles are likely to be agglomerated.
For instance, methods for preparing zeolites in forms of fine particle crystals by selecting suitable reaction conditions are disclosed in Japanese Patent Laid-Open Nos. 50-70289 (DE-A-2333068) and 51-84790 (DE-A-2447021) and Japanese Patent Examined Publication Nos. 59-4376, 2-4528, and 4-55976. However, in all these methods, it is economically disadvantageous to prepare particles which are well crystallized and have a particle size of 0.5 .mu.m or less. In fact, there are some zeolites commercially available as products having a primary particle size of about 1 .mu.m in the primary particles by the method of producing fine particle crystals mentioned above. However, these products are considerably more expensive than general zeolites having a primary particle size of about 3 .mu.m.
Also, when a zeolite suspended in a dispersion medium comprising water as a main component is ground in a state of slurry, the crystal structure thereof is broken, so that the calcium ion exchange capacity is drastically deteriorated. Although attempts have been made to improve the dispersibility of the zeolites by giving shear force to the water slurry upon the production of zeolite, it has been difficult to achieve a high calcium ion exchange capacity even if fine particles were produced by giving stronger grinding force to the slurry after maturing the zeolite.
On the other hand, silicate compounds, such as SKS-6 (sodium silicate: Na.sub.2 Si.sub.2 O.sub.5) made commercially available by Hoechst AG, have similarly good calcium ion capturing ability as the zeolites, and their applications for detergent builders have been studied. Crystalline alkali metal silicate compounds typically exemplified by SKS-6 are supplied in a powder form having a particle size distribution mainly in the range of from about 20 to 100 .mu.m. The silicate compounds are known to have a property that when the silicate compounds are placed in water, they are naturally broken into considerably fine particles (volume mean particle size being about 4 .mu.m). Also, when compared with the above zeolites, the silicate compounds have relatively small problem in forming
REFERENCES:
patent: 3962132 (1976-06-01), Haschke et al.
patent: 4126574 (1978-11-01), Reinwald et al.
patent: 4280920 (1981-07-01), Garvey et al.
patent: 4336234 (1982-06-01), Leutner et al.
patent: 4606503 (1986-08-01), Bleeck
patent: 4664839 (1987-05-01), Rieck
patent: 4732880 (1988-03-01), Ugo et al.
patent: 4820439 (1989-04-01), Rieck
patent: 4925586 (1990-05-01), Baker et al.
patent: 5108646 (1992-04-01), Beerse et al.
patent: 5399297 (1995-03-01), Panthal et al.
English translation of JP 57-61616, published Apr. 14, 1982.
English translation of JP 57-73097, published May 7, 1982.
English translation of WO 90/01458, published Feb. 20, 1990.
PCT Search Report for PCT/JP95/01105, dated Sept. 12, 1995.
Kanai Hiroyuki
Sakaguchi Mikio
Yamaguchi Shu
Hertzog Ardith
Kao Corporation
LandOfFree
Method for producing fine solid builder particle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing fine solid builder particle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing fine solid builder particle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-313197