Abstract: A method of providing a foam control agent with 1 to 30 parts of a silicone antifoam and 70 to 99 parts of a zeolite carrier, with the ability to release some of the antifoam within 10 minutes of being dispersed in an aqueous surfactant solution, by depositing 5 to 70% of the antifoam of an organopolysiloxane polyoxyalkylene copolymer, onto the zeolite carrier not later than depositing the silicone antifoam. Also claimed is the use of the copolymer to achieve that end and compositions where the antifoam is branched or high viscosity. Also claimed is encapsulated agents.

Abstract: A moisture curable composition is claimed comprising (a) a condensation product of a polyacid chloride with an alkylene or oxyalkylene polymer having substituent groups condensible therewith with an organosilicon compound having at least one silicon-bonded group --R(NHR.sup.1).sub.m NH.sub.2 e.g. a material of the general formula ##STR1## wherein each R may be the same or different and represent a linking group, each R' represents a group --R(NHR.sup.1).sub.m NH.sub.2, a hydrolysable group R", a group R'" or a group R'Si(OSiR.sup.1.sub.2).sub.s --O-- where R'" is a hydrocarbon group, m is from 0 to 10 and s is from 0 to 1500 and (b) a curative. Preferred materials are amino silanes in which R" is an oximo, alkoxy, alkenyloxy or alkoxyalkoxy group, --R(NHR.sup.1).sub.m NH.sub.2 is aminopropyl and m is 0. The aminosilane is preferably .gamma.-aminopropyltrimethoxysilane or .gamma.-aminopropyltriethoxysilane and the organic polymer is a polyoxyalkylene glycol.

Abstract: Polymers are prepared by reaction between a polymer prepared by reaction between (A) an OH terminated reaction product of a polyacid chloride and an organic polymer having substituent groups condensable therewith and (B) a silane or siloxane having a group capable of reaction with substituent groups of the reaction product (A). Reaction product (A) is preferably derived from a polyoxyalkylene glycol and a diacid chloride. Silane or siloxane (B) is preferably an epoxy silane and preferably has at least one silicon- bonded hydrolysable group. Preferred polymers are employed in moisture curable composition, e.g. as sealants.

Abstract: A particulate foam control agent comprises 1 to 30 parts silicone antifoam, 70 to 99 parts zeolite carrier, 1 to 60% of the antifoam of an organopolysiloxane polyoxyalkylene copolymer, deposited onto the zeolite carrier not later than the antifoam and 1 to 40 parts by weight of a polycarboxylate-type binder or encapsulant. This combination give good release in early stages, storage stability and powder characteristics.

Abstract: A method and apparatus for determining surface characteristics of a layer (e.g. anodised aluminum) by measuring electrical impedance thereof and solving specified equations.

Abstract: A process for making liquid polymers by condensing monomers and/or oligomers, mixing them with a catalyst where required, and dispersing the mixture via an atomizing device to form small droplets suspended in a reaction chamber. The reagents are caused to polymerize in the dispersed state. The process is preferably carried out in a spray dryer using an atomizing device and is particularly useful for polymerizing organosilicon compounds by condensation.

Abstract: A foam control agent which is free from hydrocarbon oils and comprises (A) an organopolysiloxane with 0 to 60% of units (i) ##EQU1## wherein R denotes a C.sub.8 hydrocarbon group and a is 0-3, and 40 to 100% of units (ii) ##EQU2## wherein R" is --Z.sub.z --R' with R' being an C.sub.9-35 alkyl, Z is a linking group and z is 0 or 1, b 0, 1 or 2, c 1 or 2 and b+c 1, 2 or 3, provided more than 70% by weight of the carbon content of (A) is due to R", (B) a finely divided hydrophobic particulate material and (C) optionally a MQ organosilicon resin. The agents give improved performance and stability e.g. in detergent powders.

Abstract: A continuous static polymerization reactor for the production of liquid polymers comprises an elongated hollow reaction chamber (30) which has a porous wall (31) and a jacket means (40) spaced around the reaction chamber (30), which is provided with means (44) for introducing a fluid through the porous wall (31). The reactor is particularly useful for a process for making liquid polymers by condensing monomers and/or oligomers. It comprising the use of a pressurized gas to cause the reaction mixture to reach a foam consistency. This is beneficial in the condensation polymerization. Feeding a fluid through the porous wall into the reaction chamber avoids build up of the polymer on the wall.

Abstract: A liquid curable composition prepared from a polydiorganosiloxane having ethylenically unsaturation, a polyhydrogenorganosiloxane, a catalyst for the addition of silicon-bonded hydrogen to ethylenically unsaturation, a particulate filler wherein the composition cured to an elastomeric state has a loss modulus, E", of at least 100 MPa at -120.degree. C., a loss tangent of at least 0.15 at -120.degree. C., and a tear strength of less than 10 kN/m at 23.degree. C., makes an interlayer for a laminate of glass or other brittle which fails safely when receiving a breaking impact.

Abstract: The specification describes and claims a method of bonding a sealant to an anodised aluminium surface the method comprising the steps of (1) measuring the electrical impedance of anodised aluminium substrates, (2) selecting at least one substrate having an electrical phase shift of from 0.4 to 0.5, (3) cleaning the anodised surface of the substrate, (4) applying to the anodised surface a curable silicone sealant composition and (5) bringing about curing of the sealant composition to form a bond between the anodised surface and the sealant.

Abstract: A suds-controlling composition of improved stability in aqueous surfactants, such as detergents, is disclosed comprising a silicon antifoam consisting essentially of a liquid branched polyorganosiloxane and a finely divided filler having a hydrophobic surface; a polyorganosiloxane polyoxyalkylene copolymer; and a cyclic organopolysiloxane. The silicone antifoam and polyorganosiloxane polyoxyalkylene copolymer are combined in a ratio of 1/3 to 3/1.

Abstract: The specification describes and claims a moisture curable composition comprising hydroxypolysiloxane, silane curing agent, finely divided filler (preferably calcium carbonate), catalyst, and as rheological additive, a polymer having on its polymer chain at least one carboxylic acid anhydride group. Preferred rheological additives are polybutadiene polymers treated with e.g. maleic acid anhydride. These products have improved rheology for sealant use.

Abstract: Progress for preparing a catalyst for hydrosilylation reactions which comprises reacting (A) a rhodium complex Rh(R.sub.2 S).sub.3 X.sub.3, in which R represents alkyl and other specified hydrocarbon groups and X represents Cl or Br with (B) an organohydrogen polysiloxane in the presence of (C) an organosiloxane having silicon-bonded vinyl or allyl groups. The ratio of silicon-bonded hydrogen atoms provided by (B) to each Rh atom provided by (B) is in the range from 0.5:1 to 6.0:1.The invention also includes the use of the catalyst for reacting .tbd.SiH with .tbd.Si Alkenyl especially in compositions for the treatment of substrates such as paper and plastics.

Abstract: Foam in an environment with free surface turbulence is controlled with a foam control agent which comprises (A) 5 to 90 parts by weight of an organopolysiloxane having at least 40% siloxane units with a substituent --Z.sub.z --R' wherein R' is a C.sub.9-35 alkyl group, Z is a linking group with silicon and z is 0 or 1, provided more than 70% by weight of its carbon content is due to the groups --Z.sub.z --R', (B) 0.1 to 30 parts by weight of a finely divided hydrophobic particulate material, (C) 5 to 95 parts by weight of a hydrocarbon oil and (D) 0 to 20 parts by weight of an organosilicon MQ resin.

Abstract: A suds-controlling composition which comprises 100 parts by weight of a silicone antifoam which has a liquid branched polyhydrocarbyl siloxane material having at most 2 mole % branching and at least 2 trifunctional or tetrafunctional siloxane units, a finely divided hydrophobic filler, and from 75 to 900 parts by weight of a polyorganosiloxane polyoxyalkylene copolymer can be used as a stable suds-controlling composition for aqueous surfactant compositions, especially liquid detergents.

Abstract: A continuous static polymerization reactor for the production of liquid polymers comprises an elongated hollow reaction chamber (30) which has a porous wall (31) and a jacket means (40) spaced around the reaction chamber (30), which is provided with means (44) for introducing a fluid through the porous wall (31). The reactor is particularly useful for a process for making liquid polymers by condensing monomers and/or oligomers. It comprising the use of a pressurized gas to cause the reaction mixture to reach a foam-like consistency. This is beneficial in the condensation polymerization. Feeding a fluid through the porous wall into the reaction chamber avoids build up of the polymer on the wall.

Abstract: Process for preparing a catalyst for hydrosilylation reactions which comprises reacting (A) a rhodium complex Rh(R.sub.2 S).sub.3 X.sub.3, in which R represents alkyl and other specified hydrocarbon groups and X represents Cl or Br with (B) an organohydrogen polysiloxane in the presence of (C) an organosiloxane having silicon-bonded vinyl or allyl groups. The ratio of silicon-bonded hydrogen atoms provided by (B) to each Rh atom provided by (B) is in the range from 0.5:1 to 6.0:1.The invention also includes the use of the catalyst for reacting .ident.SiH with .ident.Si Alkenyl especially in compositions for the treatment of substrates such as paper and plastics.

Abstract: A foldable intermediate bulk container with a preferred capacity of about 1000 liters, capable of being stacked both in its erected position and in its folded position, comprises a rectangular base (10), four walls (21, 22, 23, 24) and a lid (35, 36) which are all interconnected. Each wall is pivotally connected to the base (10), at least three of them at different heights from the support (17) of the base, ascending by at least one wall thickness. It is preferably adapted for liquid or free-flowing powder. The base (10) may incorporate the function of a pallet into the structure of the container and may include means for facilitating emptying the container. The container may use an inner pocket (20) for the liquid or powder.

Abstract: A glycerol functional polysiloxane having the formula ##STR1## wherein R is an alkyl group having from one to six carbon atoms or a phenyl group; x has a value of from zero to about six hundred; y has a value of from one to about six hundred and z has a value of from two to about eight.

Abstract: Particulate foam control agents for powder detergents consist of 1 part by weight of silicone antifoam, not less than 0.3 part by weight of a water insoluble fatty acid or a fatty alcohol with 12 to 20 carbon atoms and a melting point in the range 45 to 80% or a monoester of glycerol and a fatty acid and a native starch carrier material. They give improved storage stability and require less organic material than the prior art agents.