摘要:
A tire body of elastomeric material, terminating in two beads on opposite sides of its cavity, has a sole free of reinforcing cords carrying a tread on its outer surface and a belt of elastomeric material disposed either between the tread and the body or on the inner body surface. The belt has a stress/strain ratio at 20.degree. C and with 50% elongation which is at least 30% higher than the corresponding stress/strain ratio of the tire body.
摘要:
A molded vehicular tire is internally partitioned by a set of angularly equispaced webs integral with its toroidal casing, the webs being separated from the inner wall surfaces of the casing by arcuate gaps extending laterally from the region of its sole but terminating short of its beads. The webs, attached to the tire casing at three points, act as reinforcements allowing the tire to be used even without internal air pressure.
摘要:
A polyguanidine silicate obtainable by reacting a polymeric guanidine salt provided in an aqueous solution with an aqueous solution of a sodium and/or potassium silicate.
摘要:
A drug composition containing as a drug substance a polymeric guanidine derivative based on a diamine containing oxyalkylene chains between two amino groups, with the guanidine derivative representing a product of polycondensation between a guanidine acid addition salt and a diamine containing polyalkylene chains between two amino groups, as well as the pharmaceutically acceptable salts thereof.
摘要:
The present invention relates to the use of specific amphiphilic copolymers as synergistic adjuvant for agrotechnical applications. Suitable agrotechnical compositions are also described. Thus, the addition of such copolymers makes possible an accelerated uptake of active ingredients by the plant. The copolymers or salts thereof to be used comprise monomer units (i) based on at least one olefin and/or at least one vinyl ether, (ii) based on at least one ethylenically unsaturated dicarboxylic acid and/or at least one ethylenically unsaturated dicarboxylic acid derivative, and, optionally (iii) based on at least one further copolymerizable comonomer.
摘要:
A solid crop protection composition consisting essentially of a) one or more predominantly amorphous crop protection active ingredients which are solid per se and have solubility in water of less than 500 mg/l at 25° C. and b) a coating enclosing component (a).
摘要:
Oxime ether derivatives of the general formula IR.sup.1 R.sup.2 C.dbd.NO--CH.sub.2 --COOR.sup.3 Iwhere R.sup.1 and R.sup.2 independently of one another are each hydrogen or C.sub.1 -C.sub.6 -alkyl or, together with the carbon atom to which they are bonded, are C.sub.5 - or C.sub.6 -cycloalkyl and R.sup.3 is hydrogen or C.sub.1 -C.sub.6 -alkyl, are used for bioregulation in plants.
摘要:
The process for manufacturing pneumatic tires comprises as essential step the manufacture of a tire body by winding cords or cables (3, 23, 35). The cord or cable is withdrawn from a supply reel (7) under constant tension and laid around and anchored to the bead cores (2; 22; 36; 39) arranged at both sides of the tire. In addition a peripherally extending belt is applied which again can be formed by winding cords or cables, and the tire is completed by injection molding or die casting elastomeric material. An apparatus suitable for performing said process comprises in addition to an interior mold (1, 21, 38) two sets of outer molds, the first set allowing the shaping of an inner tire layer provided with protrusions serving as spacers for the winding of cables or cords and the second set corresponding to the external shape of the tire (FIG. 2).
摘要:
Poly(thio) ethers having terminal amino groups, said ethers having the formula: ##STR1## wherein X is oxygen or sulfur and R stands for a group of the formula ##STR2## wherein R.sub.1 to R.sub.4 represent hydrogen or halogen and B stands for a divalent polyalkylene ether group or a polyalkylene thioether group or mixtures thereof such as is obtained by removal of the hydroxyl or mercapto groups from a polyalkylene ether diol or a polyalkylene thioether dithiol of a molecular weight of 100 to 15000. A process for the production and application is also disclosed. These ethers are used in the production of poly ureas having increased thermal stability and improved tensile and structural strength.
摘要:
Compounds having terminal amino groups and being of the general formula ##STR1## wherein z is an integer of 2 to 4, X is oxygen or sulfur and R is a group of the formula--Y--[Ar--B].sub.k (II)wherein k is an integer of 1 to 4,Ar is aromatic,When k = 1, Y is B and when k = 2 to 4 then Y is an akylidene group having 1 to 5 carbon atoms,B represents divalent polyalkylene ether or polyalkylene thioether such as it is obtained by removal of the hydroxyl or mercapto groups from a polyalkylene ether diol or a polyalkylene thioether dithiol of a molecular weight of about 100 to 15000. The compounds are useful to prepare polyureas.