Abstract:
The invention relates to extracts from ginkgo biloba leaves with a reduced 4′-O-methyl pyridoxine and biflavones content, to a method for the production thereof and to medicaments containing said extracts.
Abstract:
The present invention relates to investment compounds containing zeolites and to models and moulds made from these. The investment compounds according to the invention are used in metal casting, preferably in the preparation of precision castings.
Abstract:
A hard, resistant material formed by mixing and curinga) at least one polyfunctional silicopolyether,b) at least one monomer which can be subjected to free-radical curing,c) at least one catalyst for polymerization of the free-radical monomers at high temperature, low temperature or under the influence of light, andd) at least one catalyst for the condensation of the silicopolyether.
Abstract:
The present application relates to an extract from the leaves of Ginkgo biloba containing most of the flavone glycosides, ginkgolides and bilobalide originally present in the leaves, characterized in that it is essentially free of components of the leaves with serum-precipitating and/or haemagglutinating properties, method of its preparation and pharmaceutical compositions containing the extract.
Abstract:
A method of making a dental impression which comprises applying to the structure of which an impression is to be made a special prepolymer. The prepolymer is composed of units of at least one macrodiol, at least one aliphatic polyisocyanate, and an unsaturated monoalcohol as chain terminator, wherein the average functionality of the prepolymer based on the unsaturated groups is >2.
Abstract:
The present invention relates to optically clear polysiloxane-based compositions which are employed, in particular, for the production of contact optical articles such as contact lenses, scleral lenses and intraocular lenses.
Abstract:
An addition or condensation cross-linking molding or lining compound based on silicones comprising(a) an organo polysiloxane containing reactive end groups,(b) a catalyst,(c) a filler, and(d) an isoparaffin having 8 to 24 carbon atoms.The compounds being particularly useful as dental molding compositions.
Abstract:
Impression material in the form of a powder, which, on mixing with water, provides a paste which cures to a solid consistency, the material in the form of a powder being made dust-free by additions of a coating agent, which material is characterized in that it contains paraffin as an additive.
Abstract:
Contact lenses and contact shells of light-refracting material consisting essentially of a copolymer of(I) from 40 to 90% by weight of methyl methacrylate and(II) from 10 to 60% by weight of methyl acrylate and/or esters corresponding to formula (1): ##STR1## in which R represents H or CH.sub.3,R' represents H, CH.sub.3 or C.sub.2 H.sub.5 andn=1 or 2,the sum of I and II amounting to 100% by weight.
Abstract translation:光折射材料的隐形眼镜和接触外壳基本上由(I)40-90%重量甲基丙烯酸甲酯和(II)共聚物组成,(II)10-60%重量的丙烯酸甲酯和/或对应于式 (1):其中R表示H或CH 3,R'表示H,CH 3或C 2 H 5,n = 1或2,I和II的总和为100重量%。
Abstract:
A process for the preparation of a dental impression comprisingA) forming a mixture of a polyaddition product which contains ether, urethane and urea groups,B) mixing therewith water of proton donor-containing aqueous solution in a weight ratio of A:B of from 1:0.01 to 1:40 and in at least catalytically active amount, the weight ratio of water plus proton donor to the balance of the composition exclusive of the filler ranging from about 0.01:1 to 1:1, andC) applying the mixture formed in B intraorally to a patient to make a negative copy of the patient's teeth.