摘要:
An apparatus for calibrating hollow chamber sheet extruded lines out of thermoplastic resin includes a vacuum housing and a planar intake area at a first end of the vacuum housing. The planar intake area is configured to receive the extruded line. Support rollers within the vacuum housing are configured to support the extruded line. The extruded line exits the vacuum housing through a planar outlet area located at a second end of the vacuum housing opposite the first end.
摘要:
A process for the extrusion of plastic plates with very finely structured surface using an extrusion system which is equipped with an extruder and a three roll polishing stack containing a roller with the structuring surface. The system is designed for coextrusion and the plastic plates are produced via two extruders as a coextrudate CX from a highly viscous basic molding compound BF and a low viscosity molding compound NF which is extruded on BF. The surface of said plates is structured via the three roll polishing stack. Fresnel lenses produced by the process may be used in solar collectors.
摘要:
The present invention relates to combined insulation layers (ISS), preferably for use in shipbuilding, encompassing (i) an outer layer (AS) consisting of sheet metal, combined with (ii) a melamine layer (MSS), (iii) a sheet aluminum layer, (iv) a core layer of a hard foam material (HSS), coated on both sides with a phenolic resin prepreg (PNP).
摘要:
Molding compositions MC having a reduced tendency to yellow with thermal stress which consist of a polymer PM containing units of formula I: ##STR1## blending from 0.005-1 wt % of at least one reducing inorganic phosphorus compound IP selected from the group consisting of phosphinic and phosphonic acid and its alkali metal, alkaline-earth metal, a aluminum and ammonium salts, wherein the ammonium ion can be substituted with up to four C.sub.1 -C.sub.4 alkyl and/or C.sub.5 -C.sub.8 cycloalkyl groups, with the polymer PM after conclusion of the imidation reaction.
摘要:
A composition comprising a carrier and a comb copolymer made by copolymerizing a polyalkyl (meth)acrylate macromonomer, present in an amount of 10-90 wt %, with the following monomers in a total amount of 90-10 wt %: (a) 0-90 wt % of C.sub.6 -C.sub.30 alkyl (meth)acrylates, (b) 0-60 wt % of nonfunctionalized comonomers selected form the group consisting of C.sub.1 -C.sub.5 alkyl (meth)acrylates, styrene, C.sub.1 -C.sub.4 alkyl styrenes, and vinyl esters of C.sub.2 -C.sub.12 carboxylic acids, and (c) 0-40 wt % of functionalized comonomers selected from the group consisting of functionalized (meth)acrylic acid esters and amides, and vinyl heterocyclic compounds, all of the above amounts based on the weight of the graft copolymer. The composition is especially useful as a lubricating oil additive with viscosity index-improving effect.
摘要:
A dermal therapeutic system which exhibits a prolonged release of a drug comprising at least one pharmaceutical agent combined with poly(meth)acrylates in the form of at least one layer of the therapeutic system, the poly(meth)acrylates being a mixture, which is produced from a melt, comprising (1) at least one (meth)acrylic polymer containing functional groups and (2) at least one (meth)acrylic polymer which regulates the flow behavior of the poly(meth)acrylate mixture and which contains no functional groups or only insignificant amounts of functional groups.
摘要:
Highly transparent, impact-resistant molding compositions based on polymethyl methacrylate (PMMA), having excellent color stability both during processing at high temperatures, as well as when under thermal stress, as a result of multiple processing with simultaneously high weathering stability and stability of the optical characteristics with the effect of water. Preparation is carried out according to a multi-step extruder process, wherein an extruder for the melt coagulation and one for the compounding are connected in series. Addition of small quantities of reducing inorganic phosphorous compounds at a later stage provides prolonged effectiveness.
摘要:
An aqueous liquid composition containing one or more enzymatic active substances and at least 10 wt % to a maximum of (100-x) wt % molasses, wherein x is the fraction of enzymatic active substances in wt % and wherein x is a value from 0.001 to 90, which is useful for the production of leather in the beamhouse, to improve rehydration and dirt removal while soaking, to improve the loosening of hair and to inhibit swelling during liming, and to improve the cleaning of the surface of the skin during bating.
摘要:
Thermoplastic materials which comprise a copolymer of (A) 16 to 40 wt % of acrylic and/or methacrylic acid; (B) 30 to 80 wt % of methyl acrylate; and (C) 0 to 40 wt % of another alkyl ester of acrylic and/or methacrylic acid and perhaps conventional auxiliaries for drug coatings are suitable for the production of drug coatings which are soluble in intestinal juices, such as tablet coatings, dies, films, capsules, or multipart dosage units.