Abstract: A photoluminescent material is prepared by burning hydrogen silsesquioxane resin powder in a crucible in oxygen or ammonia atmosphere at a temperature above 400.degree. C. for about two hours. The photoluminescent material has a smooth compact surface surrounding a porous and loosely packed interior, the smooth compact surface exhibiting blue photoluminescence when irradiated with ultraviolet light, and the interior portion exhibits photoluminescence at longer wavelengths when irradiated under the same conditions with ultraviolet light.
Abstract: Disclosed is a method of preparing a thermoplastic resin composition that includes combining a ground crosslinked rubber with a thermoplastic resin and a compatibilizer based on a paraffinic oil to form a blend thermoplastic composition. The ground crosslinked rubber has an average particle size of about 80 mesh or smaller. The thermoplastic resin includes at least one polyolefinic resin. The ground crosslinked rubber is included in amounts of up to about 70% by weight, based on the weight of the blend thermoplastic composition.
Type:
Grant
Filed:
December 17, 1997
Date of Patent:
January 18, 2000
Assignee:
The Standard Products Company
Inventors:
Elaine A. Mertzel, Ronald G. Weber, Louis Citarel
Abstract: The invention includes a blend composition comprising (a) about 1 to about 15 weight percent of amorphous polypropylene (b) about 99 to about 85 weight percent of crystalline polypropylene, wherein the molecular weight of the amorphous polypropylene is lower than the molecular weight of the crystalline polypropylene; the molecular weight (Mw) of the amorphous polypropylene is higher than about 50,000, preferably 100,000 g/mole; the amorphous polypropylene has a MWD less than about 3; and wherein the percentages are based on total amorphous plus crystalline polypropylene. Preferably, amorphous and crystalline polypropylenes are at least about 90 weight percent propylene units. Preferably, the amorphous polypropylene has a glass transition temperature greater than about -10.degree. C. The invention includes processes for preparing compositions of the invention, including a multistage process.
Type:
Grant
Filed:
November 23, 1998
Date of Patent:
November 16, 1999
Assignee:
The Dow Chemical Company
Inventors:
Johan A. Thoen, Patricia Ansems, Rudolf J. Koopmans