Abstract: A technology is provided for detecting spoofed satellite signals. An aircraft may be equipped with a top antenna that is adapted to receive satellite signals and a bottom antenna that is adapted to receive terrestrial signals. A signal may be received on the top antenna and the bottom antenna. Relative signal strength between the top antenna and the bottom antenna may be used to differentiate satellite sourced signals from terrestrial sourced signals.

Abstract: A technology is provided for detecting spoofed satellite signals. An aircraft may be equipped with a top antenna that is adapted to receive satellite signals and a bottom antenna that is adapted to receive terrestrial signals. A signal may be received on the top antenna and the bottom antenna. Relative signal strength between the top antenna and the bottom antenna may be used to differentiate satellite sourced signals from terrestrial sourced signals.

Abstract: A coating composition having a good balance between solids content at a given viscosity and hardness in the final coating comprising a solution in a volatile organic solvent of;i) a hydroxyl functional polymerii) a crosslinker for the polymer,characterised in that the composition also comprises iii) 1,4-cyclohexane dimethanol.

Abstract: A silane functional oligomer for use in the formulation of coating compositions having good clarity which has at east one hydrolyzable silane group and which is the reaction product of;(i) a silane coupling agent having a hydrolyzable silane group and a secondary amine group,(ii) a polyisocyanate having more than one tertiary isocyanate group, and containing at least 6% by weight of NCO groups, and(iii) optionally, compound having single isocyanate reactive group.

Abstract: The invention provides a base coat composition comprising a dispersion in an aqueous carrier for the composition of polymer microparticles, the polymer microparticles being a mixture of:(a) 5 to 95% by weight of addition polymer micro-particles having a crosslinked core and a stabilising mantle containing salt forming groups and(b) 95 to 5% by weight of addition polymer micro-particles having polyoxyalkylene stabiliser units derived from C.sub.1-4 alkoxypolyoxyalkylene containing monomers.

Abstract: An aqueous silicone compound-containing coating composition comprises an addition polymer dispersion and at least one silicone compound, the silicone compound forming part of the disperse phase of a dispersion of multi-polymer particles.The silicone compound may be monomeric, oligomeric or polymeric and it may either be added in existing form or be prepared in situ. The provision of reactive groups on either or both of silicone compound as addition polymer gives cross-linking capacity.An unusally wide variety of silicones can be used in the compositions including some not normally associated with coating compositions.

Abstract: This invention provides a water-borne coating composition comprising a sterically stabilised dispersion in an aqueous medium of a non-ionic film-forming polymer containing oxirane groups and an aminosilane of formula (1) ##STR1## where a, b and c are from 2 to 4;d and e are from 0 to 3f is from 1 to 3;R.sup.1 is C.sub.1-3 alkyl or C.sub.1-3 alkoxy andR.sup.2 and R.sup.3 are C.sub.1-3 alkoxy.

Abstract: A curing composition comprising a silane functional acrylic polymer component and a silane functional oligomer component. The polymer component is a co-polymer of functional silyl group-containing units derived from monomers of Formula:CH.sub.2 .dbd.CR.sup.1 CO.sub.2 (CH.sub.2).sub.a LThe oligomer component is of formulaE(GKL).sub.6in which E is derived from a multifunctional isocyanate oligomer, G is of general formula:--[O(CH.sub.2).sub.5 CO].sub.C [O(CH.sub.2).sub.d OCO(CH.sub.2).sub.2 ]--and K is of general formula:--[NR.sup.5 (CH.sub.2).sub.

Abstract: Wholly non-charged, sterically stabilized aqueous polymer dispersions are made by emulsifying ethylenically unsaturated monomer(s) of specified slight solubility in water and subjecting them in that state to polymerization in the presence of hydrogen peroxide and a non-ionic water-soluble activator compound and also in the presence of a steric stabilizer precursor compound containing a polymer chain which is soluble in the aqueous phase and an unsaturated grouping which can copolymerize with the monomer(s). The emulsification may be assisted by a conventional non-ionic surfactant, or alternatively the precursor compound may itself possess surface-active properties.

Abstract: Sterically stabilized aqueous polymer dispersions free from charged species are made by emulsifying in water ethylenically unsaturated monomer(s), soluble in water to the extent of 0.08%-8% by weight but giving rise to a polymer which is insoluble, and polymerizing the monomer(s) in that state in the presence of (a) a non-ionizable azo initiator which is water-soluble and substantially monomer-insoluble and (b) a block or graft copolymer stabilizer of specified structure.