Synthetic seaweed for underwater installation comprises an elongate anchor and at least one sheet of flexible material adjacent the anchor. Fastening means secures a first edge portion of the sheet to the anchor along at least a portion thereof so that the sheet extends outwardly therefrom terminating at an outer boundary edge portion. Perforations are provided in the sheet whereby resistance of the sheet to underwater currents is reduced. The sheet may be cut into strips and buoyant material ma...

A synthetic resin is in the form of a metal complex compound. The resin is the reaction product of: (a) Mannich bases which are free from epoxide groups; with (b) epoxide resins; wherein aliphatic hydroxyl groups originating from (a), (b), or a mixture thereof, are at least partially converted into urethane groups by reaction with partially blocked isocyanate, said Mannich bases (a) formed from components selected from: (a.sub.1) condensed phenols which are free from ether groups and contain at ...

Novel pseudotrisaccharides based on 2-deoxy- and 2,5-dideoxystreptamine are described. The compounds of the invention can be considered as modified Kanamycin, Gentamycin and Apramycin compounds. In particular they are deoxy derivatives especially at the 2', 3', 4', 2", 3" and/or 4" and/or possibly at the 6' or 6" positions. The compounds are active bactericides some of which are more active than Kanamycin. It is a particular advantage of the compounds that they are active against Kanamycin resis...

Synthetic seaweed for use in inhibiting coastal erosion comprises an elongate anchor with at least one sheet of flexible non-woven material adjacent thereto. A first edge portion of the sheet is secured to the anchor along at least a portion thereof so that the sheet extends outwardly from the anchor terminating at an outer boundary edge. The flexible, non-woven sheet has a series of spaced apart substantially parallel cuts extending from the outer boundary edge to but not through the first edge...

There is provided a synthetic polymer useful as a thickener in aqueous compositions. The polymer preferably comprises the reaction product of methacrylic acid, methyl methacrylate and vinyl acetate in certain specified proportions. The thickener is particularly effective in latex paint formulations.

A resinous adhesive composition which is resistant to the deleterious effect of moisture and water includes an additive selected from among inorganic nitrites, alkalinized salts of hexavalent chromium, inorganic phosphates, silicates, carbonates and mixtures thereof. The additive is present in an amount ranging from 0.1 to 10 percent, by weight, based on the weight of the adhesive.

A synthetic halloysite which is substantially iron-free is obtained by crystallization from a reaction mixture containing hydrous alumina gel and aqueous silica sol. Metal substituted synthetic halloysites can be prepared by coprecipitation of metal hydroxides with the alumina gel.

An inorganic material related to imogolite, a rare constituent of soil, which forms gels with under 1% solids concentration, is synthesized by digesting (at pH 3.1 to 5.0) soluble hydroxyaluminium complexes freshly formed at pH 3.2 to 5.5 in aqueous solution with restricted aluminium concentration.

A synthetic lubricating composition is provided comprising a major proportion of a base oil and a minor proportion of a plurality of additives, added for the purpose of substantially improving properties of such composition other than viscosity index. The base oil comprises (1) a mixture of at least two fatty acid esters of specified characteristics with regard to viscosity and (2) a hydrogenated oligomer of an alpha olefin of 6 to 12 carbon atoms. The resulting blend of base oil and additives h...

In order to provide a synthetic resin clip and a hanger with synthetic resin clips that are high in safety and can yet be produced at low cost, a synthetic resin clip and synthetic resin clips to be provided on a hanger are arranged with engaging portions being formed on inner surface portions of tips of a synthetic resin spring, which is formed in a "U" shape by being folded back at an intermediate portion, window holes for sliding of molding dies being formed on outer portions of clip members ...