Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant
Reexamination Certificate
2000-06-19
2001-09-18
Truong, Duc (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From aldehyde or derivative thereof as reactant
C528S230000
Reexamination Certificate
active
06291632
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to compositions having lubricity, smoothness, and opacity as distinguishing characteristics. In one aspect the invention relates to cosmetic formulations with specific reference to an additive to a formulation for achieving a silky smooth feel, and opacity in filling or smoothing skin surfaces.
SUMMARY OF THE INVENTION
The present invention is directed to microspheres of a polymer which exhibits superior properties as a lubricant per se and for improving the lubricity of other products. Microspheres of the polymer also have use for coating applications in other products, and in cosmetics for imparting a silky feel to skin lotions where a filling or smoothing of the skin is desired.
The invention comprises microspheres of polymerized melamine formaldehyde resin. The unique feature resides in the polymer being formed into microscopic spheres which are perfectly spherical. The microscopic spheres function as round ball bearings, and greatly reduce friction and drag. The microscopic spheres may be incorporated as a lubricant in other compositions to greatly reduce the friction of the composition.
Microspheres of polymerized melamine formaldehyde resin have a coefficient of friction substantially less than spherical silica, titanium dioxide, talc, porous spherical nylon, and boron nitride using a standard test method.
OBJECTS OF THE INVENTION
An object of the invention is to provide microspheres of a melamine polymer for use as a lubricant.
An object of the invention is to provide microspheres of a melamine polymer as providing opacity to compositions.
Another object of the invention is to provide a lubricant for greatly reducing the friction and drag of other compositions.
Another object of the invention is to provide microspheres of a melamine formaldehyde polymer having a coefficient of friction substantially lower than that of other known solid lubricants.
Other and further objects of the invention will become apparent with an understanding of the following detailed description of the invention or upon employment of the invention in practice.
REFERENCES:
patent: 3904575 (1975-09-01), Satokawa et al.
patent: 5614313 (1997-03-01), Mills et al.
patent: 5827615 (1998-10-01), Touhsaent et al.
patent: 5830548 (1998-11-01), Anderson et al.
Grantec Inc.
Truong Duc
Walsh Patrick J.
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