Aqueous dispersion of cured silicone rubber particles

Details Aqueous dispersion of cured silicone rubber particles Aqueous dispersion of cured silicone rubber particles

2001-08-06

2002-12-24

Dawson, Robert (Department: 1712)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Biocides; animal or insect repellents or attractants

C523S122000, C524S284000, C524S287000, C524S323000, C524S379000, C524S384000, C524S386000, C524S388000

Reexamination Certificate

active

06497894

ABSTRACT:

CROSS-REFERENCE TO RELATED APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO A MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
This invention relates to an aqueous dispersion of cured silicone rubber particles, more particularly to an aqueous dispersion of cured silicone rubber particles which is imparted with superior antiseptic properties and anti-mildew properties, without impairing stability of the aqueous dispersion.
BACKGROUND OF THE INVENTION
Aqueous dispersions of cured silicone rubber particles have been used as raw materials for cosmetics and in various coatings. Reference may be had, for example, to U.S. Pat. No. 5,708,057 (Jan. 13, 1998), U.S. Pat. No. 5,871,761 (Feb. 16, 1999), 5,928,660 (Jul. 27, 1999), and U.S. Pat. No. 6,238,656 (May 25, 2001). To improve their stability, it is often necessary to increase the content of surface active agents and add more thickening agents to these aqueous dispersions. This, however, has stimulated the growth of mildew and fungi. There is, therefore, a need to improve their antiseptic properties and anti-mildew properties, while at the same time to maintain the stability of the aqueous dispersion of cured silicone rubber particles.
BRIEF SUMMARY OF THE INVENTION
Thus, it is an object of the invention to provide an aqueous dispersion of cured silicone rubber particles possessing superior antiseptic properties and anti-mildew properties without impairing the stability of the aqueous dispersion.
These and other features of the invention will become apparent from a consideration of the detailed description.


REFERENCES:
patent: 5708057 (1998-01-01), Morita et al.
patent: 5871761 (1999-02-01), Kuwata et al.
patent: 5928660 (1999-07-01), Kobayashi et al.
patent: 6183766 (2001-02-01), Sine et al.
patent: 6238656 (2001-05-01), Morita et al.
patent: 6294186 (2001-09-01), Beerse et al.
patent: 6399081 (2002-06-01), Nakanishi et al.
patent: 2002/0002124 (2002-01-01), Biedermann et al.

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