DE2350765

1435067 Films and laminates by sintering BAYER AG 8 Oct 1974 [10 Oct 1973] 43504/74 Headings B5B and B5N [Also in Division B2] Films and laminates are formed by laying polyurethane and/or polyurethane urea on a flexible temporary support for stripping therefrom or coating a flexible permanent suppor...

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Hauptverfasser:	WEBER, KARL-ARNOLD., 5090 LEVERKUSEN, DE, REISCHL, ARTUR., 5090 LEVERKUSEN, DE, HARDT, BERT, 5060 BERGISCH GLADBACH, DE, REIFF, HELMUT., 5000 KOELN, DE, KLIPFEL, SIEGFRIED, 5090 LEVERKUSEN, DE
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMISTRY COMPOSITIONS BASED THEREON FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR GENERAL PROCESSES OF COMPOUNDING LAUNDERING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OF TEXTILES OR THE LIKE WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL WORKING-UP
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Beschreibung
Zusammenfassung:	1435067 Films and laminates by sintering BAYER AG 8 Oct 1974 [10 Oct 1973] 43504/74 Headings B5B and B5N [Also in Division B2] Films and laminates are formed by laying polyurethane and/or polyurethane urea on a flexible temporary support for stripping therefrom or coating a flexible permanent support by (A), applying to the support a dry polyurethane and/or polyurethane urea powder which: (a) comprises smooth, spheroidal particles; (b) has an average diameter of 5 to 200 Á; (c) has an ionic group content of 1 to 15, milliequivalents per 100 g.; (d) has an electrical resistance of 1010 to 1014 ohm./cm.; (e) has an intrinsic melt index (I.M.I.) curve (ASTM D1238-65T) in the shape of the ascending branch of a parabola such that the I.M.I. changes within a temperature interval of from 5 to 50 C. from 2 g. per 10 minutes to 50 g. per 10 minutes, and (B) sintering or fusing the powder by heat. The powder may contain Mg stearate as lubicant and C black, TiO 2 , aluminium bronze, iron pigment or cadmium pigment. Separate pigments may be used in several powders each issuing from one coating nozzle to form a multicolour film. Suitable methods of preparing the polymers are listed. The powder is preferably applied by doctor spreading and may be heated just to its melting point to produce a macroporous layer or above to produce a continuous film. In examples various two layer films are produced, one of which may be macroporous, the layers being the same or of different polyurethanes. In Examples (3) a one- or two-layer film is wet laminated to one or both sides of cotton fabric, polyester fabric or a non-woven fibre web using polyurethane solution or dispersion as adhesive, (7) a knitted cotton fabric is laminated to a two-layer film without adhesive while the film is tacky, (9) a two-layer film is laminated to a polyester/polyamide non-woven fibre web, and (10) a cotton/poplin fabric is calendered to a one-layer film.