公开(公告)号：US3625050A

公开(公告)日：1971-12-07

申请号：US3625050D

申请日：1969-07-18

Applicant: BASF AG

Inventor： NOETZEL WOLFRAM ,  DAUR THEODOR

IPC: G01N11/06

CPC classification number: G01N11/06

Abstract: EQUIPMENT FOR DETERMINING THE MELT VISOCITY OF THERMOPLATICS CONSISTING OF A CYLINDRICAL TUBE WITH AN ORIFICE PROVIDED AT THE LOWER END, AND A WEIGHTED PLUNGER WHICH IS INTRODUCTED INTO THE TUBE AFTER THE PLASTICS MATERIAL TO BE TESTED HAS BEEN CHARGED INTO THE SAME.

公开(公告)号：FR78749E

公开(公告)日：1962-08-31

申请号：FR845206

申请日：1960-11-28

Applicant: BASF AG

Inventor： DAUR THEODOR ,  DANIEL WALTER ,  HELLEMANNS ALFRED ,  WILHELM HANS

IPC: C09K23/00

公开(公告)号：CA568149A

公开(公告)日：1958-12-30

申请号：CA568149D

Applicant: BASF AG

Inventor： DANIEL WALTER ,  DAUR THEODOR ,  LANGE HEINZ ,  LINKE ROLAND

公开(公告)号：FR1371585A

公开(公告)日：1964-09-04

申请号：FR950446

申请日：1963-10-12

Applicant: BASF AG

Inventor： RETTIG AUGUST ,  SCHMIDTS KURT ,  DAUR THEODOR

IPC: B29C47/88

Abstract: 1,053,528. Tubular films. BADISCHE ANILIN- & SODA-FABRIK A.G. Oct. 11, 1963 [Oct. 12, 1962], No. 40145/63. Heading B5B. Highly transparent films of thermoplastics, e.g. polyolefins are made by extruding a tubular film at a temperature above the softening point of the thermoplastic, passing the film after inflation through an annular cooling zone in which the film is exposed to a gaseous cooling medium flowing at a uniform rate, and squeezing the film after cooling to a temperature below the range of crystallization of the thermoplastic, the thermoplastic being heated in an extruder to a temperature at least 30‹ C. above its softening point, and the tubular film being cooled in the region in which the thermoplastic changes from the plastic condition to the solidified condition, the flow velocity of the cooling medium, emanating from a porous surface, being 1 to 30 m/sec. in the whole region of the cooling zone, and the flow velocity of the cooling medium and the width of the cooling zone being such that the tubular film becomes cloudy in the first third of the cooling zone, adjacent the extruder, and then becomes clear again. The cooling medium may be air or nitrogen, dry or laden with water vapour. Apparatus for the process comprises an extruder, having an annular die, nip rollers for withdrawing the film, and a cooling ring provided in the region in which the film reaches its greatest diameter, the cooling ring surrounding the film and having means for supplying air thereto and having an annular wall facing its axis, and made of porous material. In one embodiment, a tubular film 2 of, e.g. isotactic polypropylene is extruded through die 1 inflated by air line 3 and squeezed between nip rolls 4. A hollow cooling ring 7 is provided with air supply lines 5 and water supply lines 6. Wall 8, facing the axis of the ring is porous and may be made of, e.g. ceramic, felt, multilayer fabric, sponge or particles of metal or plastic sintered together, particularly sintered bronze balls of 1 mm. diameter. In operation, air from 5 escapes from the porous surface and flows uniformly on to the surface of the film. The air may evaporate water contained in the porous material. The film issuing from the cooling zone is highly transparent and has low scattering power.

公开(公告)号：GB741457A

公开(公告)日：1955-12-07

申请号：GB2464553

申请日：1953-09-07

Applicant: BASF AG

Inventor： DANIEL WALTER ,  DAUR THEODOR ,  LANGE HEINZ ,  LINKE ROLAND

IPC: C09J123/22

Abstract: A composition comprising a polymer of isobutylene with a minimum content of 80 per cent of isobutylene, preferably of molecular weight 30,000 to 300,000, and at least 30 per cent of a silicate filler based on the total mixture is used as a sealing profile for expansion joints of structures, particularly of concrete or reinforced concrete. Copolymers of isobutylene with 0.5 to 20 per cent of butadiene, isoprene, pentadiene - 1,3, 1,3 - trimethylbutadiene - 1,3, hexadiene-1,3, 2-chlorobutadiene, cyclopentadiene, styrene, a -methyl styrene, vinyl ethers and dimethyl and diethyl fumarates, may be used. Suitable fillers are dispersed silicic acid, silica gel, siliceous chalk, kieselguhr, infusorial earth, feldspar, kaolin, bole, bentonite, asbestos, steatite, talc, cement, glass powder and shale or pumice powders. Activated carbon, zinc oxide, asphalt, stearic acid, mineral waxes, polyethylene, or polyisobutylene of molecular weight 10,000 or 15,000 may also be present in 15 to 25 per cent by weight. The profiles may be extruded or rolled and afterwards vulcanized with the aid of sulphur, mercaptobenzothiazole and tetramethylthiuram disulphide.