摘要:
A catalyst system comprising a combination of: 1) an activator; 2) one or more metallocene catalyst compounds; 3) a support comprising an organosilica material, which is a mesoporous organosilica material. The organosilica material is a polymer of at least one monomer of Formula [Z1OZ2 SiCh2]3(i), where Z1 represents a hydrogen atom, a C1-C4 alkyl group, or a bond to a silic-on atom of another monomer and Z2 represents a hydroxyl group, a C1-C4alkoxy group, a C1-C6 salkyl group, or an oxygen atom bonded to a silicon atom of another monomer. This invention further relates to processes to polymerize olefins comprising contacting one or more olefins with the above catalyst system.
摘要:
Adsorbent materials including a porous material support and about 0.5 wt. % to about 30 wt. % of a Group 8 metal ion are provide herein. Methods of making the adsorbent material and processes of using the adsorbent material, e.g., for heteroatom species separation, are also provided herein.
摘要:
A (meth)allylsilane compound chemically bonded to various alcohol derivatives including polyol derivatives such as saccharides, is raw material used to cause a substrate to express functionalities such as a defogging property and separation characteristics for column chromatography, can be easily prepared, is easily purified, and is stable and easy to handle, and a functional material in which those functionalities are expressed, while silyl group-containing groups are conveniently carried at a high density on the surface of the substrate, by using the (meth)allylsilane compound as a silane coupling agent for silane-coupling to the substrate. The (meth)allylsilane compound includes a (meth)allylsilyl group-containing alkyl group or a (meth)allylsilylalkyl group-containing aralkyl group that is bonded to an alcohol derivative. In the functional material, the silane coupling agent is ether-bonded to surface hydroxyl groups exposed on a substrate through the surface hydroxyl groups by silane coupling to have an ether bond on the functional material.
摘要:
This invention provides LC compositions useful as birefringent materials in electrooptic devices which exhibit zero or low negatively sloped birefringence dispersion (e.g., exhibiting positive birefringence dispersion significantly lower than that of currently available LC compositions) or more preferably positively sloped birefringence dispersion in which birefringence of the material increases with wavelength. The invention provides compounds useful as components of LC compositions which exhibit negative birefringence where n.sub.o is higher than n.sub.e. The compounds of this invention are dimers of LC-like compounds in which the monomers are linked to each other through a high birefringence moiety (dimerization linker). The LC monomers consist of an LC core and one or two tail groups. Preferred monomers for this invention have low birefringence in comparison to the birefrigence of the monomer linking moiety. The dimers have normal positive birefringence dispersion to have birefringence that is lower in absolute value at longer wavelengths. But since they have negative birefringence, their birefringence actually increases (i.e., goes less negative) as wavelength increases.
摘要:
This invention relates to the compounds of 2,6-di-t-butyl-4-[(dimethyl-4-methoxyphenylsilyl)methyloxy]phenol and 2,6-di-t-butyl-4-[(dimethyl-2-methoxyphenylsilyl)methyloxy]phenol, polymorphs thereof and their pharmaceutically acceptable salts, useful as antiatherosclerotic agents.
摘要:
This invention provides pharmaceutical compositions containing lipoxin compounds and therapeutic uses for the compounds in treating or preventing a disease or condition associated with columnar epithelial inflammation. The invention also discloses methods for screening for compounds useful in preventing columnar epithelial inflammation.
摘要:
Compounds of formula I ##STR1## wherein R, R.sup.1, R.sup.2, and R.sup.3 and A are as defined herein, together with pharmaceutically acceptable salts, enantiomers or tautomers are useful as pharmaceuticals, particularly in the treatment of inflammatory disease.
摘要:
A silacyclohexane compound of the formulas (I) ##STR1## wherein R represents an organic residue, ##STR2## represents an unsubstituted or substituted silicon-containing cyclohexylene group or a 1,4-cyclohexylene group, ##STR3## represents an unsubstituted or substituted phenylene, an unsubstituted or substituted silicon-containing cyclohexylene group or trans-4-sila-1,4-cyclohexylene group, or a 1,4-cyclohexylene group provided that at least one of these residues represents a silicon-containing cyclohexylene group, j, k and l are, respectively, 0 or 1, L.sub.1 and L.sub.2, respectively, represent H or F, m and n are, respectively, 0, 1 or 2 provided that m+n=2, 3 or 4, and X represents H, F or Cl. A liquid crystal composition comprising the silacyclohexane compound of the above formula is also described, along with a liquid crystal device comprising the composition.
摘要翻译:式(I)的硅环己烷化合物,其中R表示有机残基,表示未取代或取代的含硅亚环己基或1,4-亚环己基,表示未取代或取代的亚苯基,未取代或取代的含硅亚环己基 基团或反式-4-硅烷-1,4-亚环己基或1,4-亚环己基,条件是这些残基中的至少一个表示含硅的亚环己基,j,k和l分别为0或 1,L1和L2分别表示H或F,m和n分别为0,1或2,条件是m + n = 2,3或4,X表示H,F或Cl。 还描述了包含上式的硅环己烷化合物的液晶组合物以及包含该组合物的液晶装置。
摘要:
A subject of the invention is the products of formula (I): ##STR1## in which: R.sub.1, R.sub.2 and R.sub.3, identical or different, represent a linear, branched or cyclic alkyl radical, an alkenyl or alkynyl radical, containing up to 8 carbon atoms, optionally substituted by one or more halogen atoms, an aryl radical optionally substituted by one or more halogen atoms, one or more hydroxyl radicals, one or more linear or branched alkyl radicals, optionally substituted by one or more halogen atoms, one or more O-alkyl or S-alkyl radicals optionally substituted by one or more halogen atoms,X represents a hydrogen atom, a halogen atom, an alkyl, alkenyl, alkynyl, O-alkyl, O-alkenyl, O-alkynyl, S-alkyl, S-alkenyl or S-alkynyl radical, optionally substituted by one or more halogen atoms and containing up to 11 carbon atoms, an aryl radical containing up to 14 carbon atoms, a C.tbd.N, NO.sub.2, NH.sub.2, ##STR2## CO.sub.2 alk.sub.3 radical, alk.sub.1, alk.sub.2 and alk.sub.3, identical to or different from each other, representing an alkyl radical containing up to 8 carbon atoms,R.sub.4 represents one of the values indicated above for X with the exception of hydrogen.
摘要:
There is provided a method for the control of phytopathogenic fungi and disease caused thereby which comprises contacting said fungi with a fungicidally effective amount of a benzophenone compound of formula I ##STR1## There are further provided benzophenone compounds of formula Ia which are useful as fungicidal agents and compositions useful for the protection of plants from the damaging effects of phytopathogenic fungi and fungal disease.