公开(公告)号：GR3018523T3

公开(公告)日：1996-03-31

申请号：GR950403662

申请日：1995-12-21

Applicant: HOECHST AG

Inventor： COUTANDIN JOCHEN DR ,  THEIS JUERGEN DR ,  GROH WERNER DR ,  BROCKMEYER ANDREAS DR

IPC: G02B6/00 ,  G02B6/24 ,  G02B6/28 ,  G02B6/287 ,  G02B6/38

Abstract: Method for the production of an optical coupler for polymer light-guides by arranging the light-guides in the same direction and bundling them by means of a plastic shrink-fit sleeve. In this method, two to 10 polymer light-guides are arranged in the same direction and bundled and a plastic tube is slipped over the mixing zone. Subsequently, a piece of plastic shrink-fit sleeve is pushed over the plastic tube and the shrink-fit sleeve is heated to a temperature at which it contracts. The shrinking temperature of the shrink-fit sleeve is within the thermoelastic temperature range of the plastic tube. The light-guide bundles may be stretched during or after heating.

公开(公告)号：AT75427T

公开(公告)日：1992-05-15

申请号：AT87102847

申请日：1987-02-27

Applicant: HOECHST AG

Inventor： HERBRECHTSMEIER PETER DR ,  FLEISSNER MANFRED DR ,  GROH WERNER DR ,  HEUMUELLER RUDOLF DR ,  WIENERS GERHARD DR

IPC: G02B6/00 ,  B05D7/02 ,  B29D11/00 ,  C08F8/40 ,  C08F20/22 ,  D01F8/10 ,  G02B6/02 ,  G02B6/16

公开(公告)号：DE3777968D1

公开(公告)日：1992-05-07

申请号：DE3777968

申请日：1987-10-20

Applicant: HOECHST AG

Inventor： WIENERS GERHARD DR ,  HEUMUELLER RUDOLF DR ,  COUTANDIN JOCHEN DR ,  GROH WERNER DR ,  HERBRECHTSMEIER PETER DR

IPC: G02B6/00 ,  B29D11/00 ,  C08F20/22 ,  D01F8/10 ,  G02B6/10

Abstract: Optical fibre consists of a transparent thermoplastic polymer (I) contg. units derived from a chloro- or bromo-phenyl acrylate, fluoroacrylate or methacrylate of formula (II), where R = H, F or Me; X = Cl or Br; n = 1-5. The optical fibre has a core-sheath structure, the core having a higher refractive index than the sheath, and the core and/or sheath consists of (I). (I) has at least 50 wt.% (II) units.

公开(公告)号：DE3737930A1

公开(公告)日：1989-05-18

申请号：DE3737930

申请日：1987-11-07

Applicant: HOECHST AG

Inventor： COUTANDIN JOCHEN DR ,  THEIS JUERGEN DR ,  GROH WERNER DR ,  HERBRECHTSMEIER PETER DR

IPC: B29C61/02 ,  B29C61/06 ,  B29D11/00 ,  G02B6/28

Abstract: High-performance optical couplers for polymer light guides are obtained if light guides are grouped together by means of a piece of plastic shrink-fit tubing and fused. The shrink-fit tubing is thereby heated above the shrinking temperature. The method is simple and inexpensive.

公开(公告)号：DE3614695A1

公开(公告)日：1987-11-05

申请号：DE3614695

申请日：1986-04-30

Applicant: HOECHST AG

Inventor： HEUMUELLER RUDOLF DR ,  HERBRECHTSMEIER PETER DR ,  SIEGEMUND GUENTER DR ,  GROH WERNER DR

IPC: C07C51/34 ,  C07C51/377 ,  C07C51/60 ,  C08F20/22 ,  C07C69/653 ,  C08F20/24

Abstract: Esters of alpha -fluoroacrylic acid with a fluorine-containing alcohol are accessible by hydrolysis of an alpha -hydroxymethyl- alpha -fluoromalonic ester, decarboxylation and dehydration of the hydrolysis product and subsequent esterification of the resulting alpha -fluoroacrylic acid with an alcohol from the 1,1-bis(trifluoromethyl)alkanol series. The esters are polymerisable and are suitable as starting material for the preparation of fluorine-containing polymers.

公开(公告)号：DE3602275A1

公开(公告)日：1987-07-30

申请号：DE3602275

申请日：1986-01-25

Applicant: HOECHST AG

Inventor： WIENERS GERHARD DR ,  HEUMUELLER RUDOLF DR ,  GROH WERNER DR ,  HERBRECHTSMEIER PETER DR

IPC: C07C51/34 ,  C07C51/377 ,  C07C51/60 ,  C08F20/22 ,  C08F20/24 ,  G02B1/04

Abstract: Fluorine-containing polymers can be prepared by free-radical-initiated polymerisation of corresponding fluorine-containing monomers, optionally mixed with other vinyl monomers. The polymerisation temperature depends on the decomposition temperature of the initiator. The fluorine-containing monomers used can also contain deuterium atoms. Particularly suitable monomers are those of the formula H2C=CF-CO-O-C(CF3)-X, in which X is a hydrogen atom or a deuterium atom. The polymers have a high molecular weight, are non-crystalline and have softening points of above 100 DEG C. They are used in particular as materials for the production of transparent articles.

公开(公告)号：DE59505363D1

公开(公告)日：1999-04-22

申请号：DE59505363

申请日：1995-08-17

Applicant: HOECHST AG

Inventor： DAHRINGER JOERG ,  ALBERS ERNST-AUGUST DR ,  GROH WERNER DR ,  HEYER ACHIM

IPC: D01F6/92 ,  B01D39/08 ,  D01F1/09 ,  D01F6/90 ,  D04H1/42 ,  D04H1/4334 ,  D04H1/435 ,  D04H1/4382 ,  D04H1/541 ,  D04H1/542 ,  D04H1/55 ,  D04H13/00

Abstract: A non-woven fabric of electret fibres is predominantly made of a fibre-forming polymer or polycondensate and 0.01-30, pref. 0.01-10, and esp. 0.1-5, wt.% of an organic or organometallic charge control agent. The fabric contains ≥ 2 sorts of electret fibres which are made from different materials. Also claims dust filters and dust wiping cloth made from the non-woven fabric; and the use of the non-woven fabric in fire dust filters and in dust wiping cloths.

公开(公告)号：DE59208267D1

公开(公告)日：1997-04-30

申请号：DE59208267

申请日：1992-12-04

Applicant: HOECHST AG

Inventor： ZIMMERMANN ANDREAS ,  BARGON JOACHIM PROF DR ,  STEHLIN THOMAS DR ,  PRASS WERNER DR ,  GROH WERNER DR

IPC: G01N21/78 ,  C09K11/06 ,  G01N21/64

Abstract: Measuring device for the determination of the concentrations of inorganic and organic compounds in a sample, with a sensor which is to be brought into contact with the sample and which contains a fluorescence-optical indicator which after excitation via an excitation light source fluoresces as a function of the present concentration of the inorganic or organic compound to be detected. The measuring device has an arrangement for measuring and analyzing the incident radiation and the re-emitted fluorescence light. The measuring device contains a sensor element which is to be brought into contact with the sample and consists of a polymer matrix which is prepared from a) a matrix component which is derived from one or more units of the formula I where R - is hydrogen, deuterium or methyl; R - and R -, independently of one another, are hydrogen, deuterium or methyl, and the degree of polymerization, n is an integer in the range from 80 to 2500, preferably from 200 to 2000; b) a dye component which is immobilized covalently on the acyl chloride groups of the matrix component and c) one or more swelling components which are bound covalently to the remaining free acyl chloride groups of the matrix component.

公开(公告)号：AT122471T

公开(公告)日：1995-05-15

申请号：AT91120428

申请日：1991-11-28

Applicant: HOECHST AG

Inventor： BROCKMEYER ANDREAS DR ,  VOWINKEL HANS ,  GROH WERNER DR ,  STEHLIN THOMAS DR ,  THEIS JUERGEN DR

IPC: B29C65/00 ,  B29C65/08 ,  B29D11/00 ,  C03B37/15 ,  G02B6/245 ,  G02B6/255 ,  G02B6/28

Abstract: Process for manufacturing an optical coupler for polymer light-guides with the aid of the ultrasonic welding technique. The fibres (2, 6) are heated to a temperature of 50 to 250 DEG C for 0.2 to 3 hours before welding. The polymer light-guides are introduced into a small plastic tube (5), which during the welding operation fuses with the said light-guides to form a unit. In another embodiment, a mixer rod, which has the same refractive index as the core material of the polymeric optical fibres, can be introduced into the small plastic tube (5), the polymeric optical fibres are brought into contact with it and the small plastic tube, the mixer rod and the fibres are welded to one another under the effect of ultrasound. … …

公开(公告)号：DE59008280D1

公开(公告)日：1995-03-02

申请号：DE59008280

申请日：1990-06-09

Applicant: HOECHST AG

Inventor： COUTANDIN JOCHEN DR ,  GROH WERNER DR ,  HERBRECHTSMEIER PETER DR ,  THEIS JUERGEN DR

IPC: G02B6/26 ,  B23K26/402 ,  B29C65/70 ,  G02B6/28 ,  G02B6/36 ,  B23K26/00

Abstract: Channels, in which polymer light waveguides can be inserted, can be milled in the surfaces of plastic sheets by means of an excimer laser. The free space between the light waveguides is filled with a transparent cast resin. … The channels, produced by means of the laser, are distinguished by high dimensional accuracy and low surface roughness. … …