1. A method for optimizing a distribution of resources of a scanning sensor over a number of areas, where each area can have a demand for the sensor resources, said demands being expressed as a dwell time and a revisit time, the method comprising:
assigning to each of said number of areas a priority;
compiling a total demand for the resources;
comparing the total demand with total sensor resources; and
when the total demand and the total sensor resources do not match, distributing the total sensor resources according to said priority.
2. The method of claim 1, wherein the demand for sensor resources in an area is calculated as a ratio between dwell time and revisit time.
3. The method of claim 1, wherein when the total sensor resources exceed the total demand, surplus resources are distributed according to an equation:
\u0394Rn=(Pn*Rn\u03a3(Pn*Rn))*\u0394Rtot
where:
\u0394Rn is an amount of additional sensor resources that will be allocated to an area n,
Pn is the priority for the area n,
Rn is the desired amount of resources for the area n,
\u03a3Pn*Rn is taken over all areas n, and
\u0394Rtot is the total surplus of sensor resources.
4. The method of claim 1, wherein when the total demand exceed the total sensor resources, allocated sensor resources for the areas are decreased by an amount \u0394R compared to the demands according to an equation:
\u0394Rn=((Ptot\u2212Pn)*Rn\u03a3((Ptot\u2212Pn)*Rn))*\u0394Rtot
where:
\u0394Rn is a decrease in allocated resources for an area n,
Ptot is a sum of the priorities of all of the areas,
Pn is the priority for area n,
Rn is the desired amount of resources for area n,
\u03a3Pn*Rn is taken over all areas n, and
\u0394Rtot is a total reduction of sensor resources demanded.
5. The method of claim 1, wherein when the total sensor resources exceed the total demand, only surplus resources are distributed according to the priorities of the areas.
6. The method of claim 1, wherein when the total demand exceed the total sensor resources, allocated sensor resources for each area are decreased based on a proportion of the demand associated with the area and only a total of the decreased sensor resources are distributed according to the priorities of the areas.
7. A method for optimizing the distribution of a scanning sensor resource over plural areas, the method comprising:
determining sensor priority associated with each of the plural areas;
determining a total demand for the scanning sensor resource based on individual demands of the plural areas, wherein each area demands a portion of the scanning sensor resource;
comparing the total resource demand with a total resource available; and
determining whether the total resource available is greater than the total resource demand based on the comparison;
wherein when it is determined that there is total resource available is greater than the total resource demand, the method further comprising:
providing to each area the portion of the scanning sensor resource demanded by the area; and
distributing a surplus resource available based on the corresponding sensor priority of each area.
8. The method of claim 7, wherein in the step of distributing the surplus resource available, the distribution is performed according to an equation:
\u0394Rn=(Pn*Rn\u03a3(Pn*Rn))*\u0394Rtot,
where:
\u0394Rn is an amount of additional sensor resources allocated to an area n,
Pn is the sensor priority for the area n,
Rn is the portion of scanning sensor resource originally demanded by the area n,
\u03a3Pn*Rn is taken over all areas n, and
\u0394Rtot is the surplus resource available.
9. A method for optimizing the distribution of a scanning sensor resource over plural areas, the method comprising:
determining sensor priority associated with each of the plural areas;
determining a total demand for the scanning sensor resource based on individual demands of the plural areas, wherein each area demands a portion of the scanning sensor resource;
comparing the total resource demand with a total resource available; and
determining whether the total resource available is less than the total resource demand based on the comparison;
wherein when it is determined that there is total resource available is less than the total resource demand, the method further comprising:
decreasing, for each area, an amount of the scanning sensor resource provided to the area such that a total amount of reduction provided to the plural areas aligns the total resource available to the total resource provided to the plural area;
distributing a total amount of reduction based on the corresponding sensor priority of each area.
10. The method of claim 9, wherein in the step of distributing the total amount of reduction, the distribution is performed according to an equation:
\u0394Rn=((Ptot\u2212Pn)*Rn\u03a3((Ptot\u2212Pn)*Rn))*\u0394Rtot,
where
\u0394Ris an amount of reduction in the resource for an area n,
Ptot is a sum of the priorities of all of the areas,
Pn is the sensor priority for area n,
Rn is the portion of scanning sensor resource originally demanded by the area n,
\u03a3Pn*Rn is taken over all areas n, and
\u0394Rtot is a total amount of reduction of demand.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A curable composition comprising:
a) at least one silanol-terminated diorganopolysiloxane;
b) at least one alkylsilicate crosslinker having the formula:
(R14O)(R15O)(R16O)(R17O)Si
where R14, R15, R16 and R17 are chosen independently from monovalent C1 to C60 hydrocarbon radicals;
c) at least one catalyst for the crosslinking reaction;
d) at least one orcianic nanoclay; and, optionally; and
e) at least one solid polymer having a permeability to gas that is less than the permeability of the crosslinked diorganopolysiloxane(s).
2. The composition of claim 1 wherein catalyst (c) is a tin catalyst.
3. The composition of claim 2 wherein the tin catalyst is selected from the group consisting of dibutyltindilaurate, dibutyltindiacetate, dibutyltindimethoxide, tinoctoate, isobutyltintriceroate, dibutyltinoxide, dibutyltin bis-diisooctylphthalate, bis-tripropoxysilyl dioctyltin, dibutyltin bis-acetylacetone, silylated dibutyltin dioxide, carbomethoxyphenyl tin tris-uberate, isobutyltin triceroate, dimethyltin dibutyrate, dimethyltin di-neodecanoate, triethyltin tartarate, dibutyltin dibenzoate, tin oleate, tin naphthenate, butyltintri-2-ethylhexylhexoate, tinbutyrate, diorganotin bis \u03b2-diketonates and mixtures thereof.
4. The composition of claim 1 wherein the nanoclay portion of organic nanoclay (d) is selected from the group consisting of montmorillonite, sodium montmorillonite, calcium montmorillonite, magnesium montmorillonite, nontronite, beidellite, volkonskoite, laponite, hectorite, saponite, sauconite, magadite, kenyaite, sobockite, svindordite, stevensite, vermiculite, halloysite, aluminate oxides, hydrotalcite, illite, rectorite, tarosovite, ledikite, kaolinite and, mixtures thereof.
5. The composition of claim 1 wherein the organic portion of organic nanoclay (d) is at least one tertiary amine compound R3R4R5N andor quarternary ammonium compound R6R7R8N+X\u2212 wherein R3, R4, R5, R6, R7 and R8 each independently is an alkyl, alkenyl or alkoxy silane group of up to 60 carbon atoms and X is an anion.
6. The composition of claim 4 wherein the nanoclay portion of organic nanoclay (d) is modified with ammonium, primary alkylammonium, secondary alkylammonium, tertiary alkylammonium quaternary alkylammonium, phosphonium derivatives of aliphatic, aromatic or arylaliphatic amines, phosphines or sulfides or sulfonium derivatives of aliphatic, aromatic or arylaliphatic amines, phosphines or sulfides.
7. The composition of claim 1 wherein solid polymer (e) is selected from the group consisting of low density polyethylene, very low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, polyisobutylene, polyvinyl acetate, polyvinyl alcohol, polystyrene, polycarbonate, polyester, such as, polyethylene terephthalate, polybutylene terephthalate, polyethylene napthalate, glycol-modified polyethylene terephthalate, polyvinylchloride, polyvinylidene chloride, polyvinylidene fluoride, thermoplastic polyurethane, acrylonitrile butadiene styrene, polymethylmethacrylate, polyvinyl fluoride, polyamides, polymethylpentene, polyimide, polyetherimide, polether ether ketone, polysulfone , polyether sulfone, ethylene chlorotrifluoroethylene, polytetrafluoroethylene, cellulose acetate, cellulose acetate butyrate, plasticized polyvinyl chloride, ionomers, polyphenylene sulfide, styrene-maleic anhydride, modified polyphenylene oxide, ethylene-propylene rubber, polybutadiene, polychloroprene, polyisoprene, polyurethane, styrene-butadiene-styrene, styrene-ethylene-butadiene-styrene, polymethylphenyl siloxane and mixtures thereof.
8. The composition of claim 1 which further comprises at least one optional component selected from the group consisting of adhesion promoter, surfactant, colorant, pigment, plasticizer, filler other than organic nanoclay, antioxidant, UV stabilizer, and biocide.
9. The composition of claim 8 wherein the adhesion promoter is selected from the group consisting of n-2-aminoethyl-3-aminopropyltrimethoxysilane, 1,3,5-tris(trimethoxysilylpropyl)isocyanurate, \u03b3-aminopropyltriethoxysilane, \u03b3-aminopropyltrimethoxysilane, aminopropyltrimethoxysilane, bis-\u03b3-trimethoxysilypropyl)amine, N-Phenyl-\u03b3-aminopropyltrimethoxysilane, triaminofunctionaltrimethoxysilane, \u03b3-aminopropylmethyldiethoxysilane, \u03b3-aminopropylmethyldiethoxysilane, methacryloxypropyltrimethoxysilane, methylaminopropyltrimethoxysilane, \u03b3-glycidoxypropylethyldimethoxysilane, \u03b3-glycidoxypropyltrimethoxysilane, \u03b3-glycidoxyethyltrimethoxysilane, \u03b2-(3,4-epoxycyclohexyl)propyltrimethoxysilane, \u03b2(3,4-epoxycyclohexyl) ethylmethyldimethoxysilane, isocyanatopropyltriethoxysilane, isocyanatopropylmethyldimethoxysilane, \u03b2-cyanoethyltrimethoxysilane, \u03b3-acryloxypropyltrimethoxysilane, \u03b3-methacryloxypropylmethyldimethoxysilane, 4-amino-3,3,-dimethylbutyltrimethoxysilane, n-ethyl-3-trimethoxysilyl-2-methylpropanamine, and mixtures thereof.
10. The composition of claim 8 wherein the surfactant is a nonionic surfactant selected from the group consisting of polyethylene glycol, polypropylene glycol, ethoxylated castor oil, oleic acid ethoxylate, alkylphenol ethoxylates, copolymers of ethylene oxide and propylene oxide and copolymers of silicones and polyethers, copolymers of silicones and copolymers of ethylene oxide and propylene oxide and mixtures thereof.
11. The composition of claim 10 wherein the non-ionic surfactant is selected from the group consisting of copolymers of ethylene oxide and propylene oxide, copolymers of silicones and polyethers, copolymers of silicones and copolymers of ethylene oxide and propylene oxide and mixtures thereof.
12. The composition of claim 8 wherein the filler other than the organic nanoclay is selected from the group consisting of calcium carbonate, precipitated calcium carbonate, colloidal calcium carbonate, calcium carbonate treated with compounds stearate or stearic acid, fumed silica, precipitated silica, silica gels, hydrophobized silicas, hydrophilic silica gels, crushed quartz, ground quartz, alumina, aluminum hydroxide, titanium hydroxide, clay, kaolin, bentonite montmorillonite, diatomaceous earth, iron oxide, carbon black and graphite, mica, talc, and mixtures thereof.
13. The cured composition of claim 1.
14. The cured composition of claim 7.
15. The cured composition of claim 8.
16. The composition of claim 13 exhibiting an argon permeability coefficient of not greater than about 900 barrers.
17. The composition of claim 14 exhibiting an argon permeability coefficient of not greater than about 900 barrers.
18. The composition of claim 15 exhibiting an argon permeability coefficient of not greater than about 900 barrers.
19. The composition of claim 1 wherein the composition is a curable sealant.
20. The composition of claim 1 wherein the composition is a cured sealant.
21. The composition of claim 13 wherein the composition is a curable sealant.
22. The composition of claim 13 wherein the composition is a cured sealant.
23. The composition of claim 9 wherein the composition is a cured adhesive.
24. The composition of claim 13 wherein the composition is a curable adhesive.
25. The composition of claim 13 wherein the composition is a cured adhesive.