公开(公告)号：US3795715A

公开(公告)日：1974-03-05

申请号：US3795715D

申请日：1971-08-20

Applicant: HOECHST AG

Inventor： CHERDRON H ,  BURG K ,  GUTWEILER K

IPC: C08L23/00 ,  C08L33/10 ,  C08L59/02 ,  C08L71/00 ,  C08D9/02 ,  C08F29/12

CPC classification number: C08L59/02 ,  C08L23/00 ,  C08L33/10 ,  C08L71/00 ,  C08L2666/02

Abstract: THE IMPACT STRENGTH OF THERMOPLASTIC POLYACETALS IS IMPROVED BY ADMIXING SMALL AMOUNTS OF POLYMERS WHICH HAVE A SOFTENING TEMPERATURE BELOW THE CRYSTALLITE MELTING POINT OF THE POLYACETAL AND A SECOND ORDER TRANSITION TEMPERATURE WITHIN THE RANGE OF FROM -120* TO +30*C. AND WHICH ARE PRESENT IN THE MIXTURE IN THE FORM OF PARTICLES OF DIAMETERS WITHIN THE RANGE OF FROM 0.1 TO 5 MICRONS. THE POLYACETALS SO MODIFIED ARE SUITABLE FOR THE MANUFACTURE OF FINISHED OR SEMI-FINISHED PRODUCTS.

公开(公告)号：US3792148A

公开(公告)日：1974-02-12

申请号：US3792148D

申请日：1972-04-14

Applicant: HOECHST AG

Inventor： RESKE E ,  BRINKMANN L ,  CHERDRON H

IPC: C08G69/48 ,  B29C25/00

CPC classification number: C08G69/48

Abstract: THERE IS DISCLOSED AND CLAIMED A PROCESS FOR THE PRODUCTION OF SHAPED ARTICLES FROM POLYAMIDES WHICH EXHIBIT MELTING RANGES NEAR TO OR ABOVE DECOMPOSTION TEMPERATURES OR POOR OR NO SOLUBILITY AT ALL IN SOLVENTS OR WHICH XHIBIT BOTH OF THESE PROPERTIES AT THE SAME TIME, THE PROCESS WHICH COMPRISES MOULDING POLYAMIDES CARRYING SUBSTITUENTS OF THE AMIDE NITROGEN AND THUS HAVING REDUCED MELTING RANGES AND/OR IMPROVED SOLUBILITY IN SOLVENTS, AND SEPARATING (SPLITTING-OFF) SAID SUBSTITUENTS PARTIALLY PR TOTALLY DURING AND/OR AFTER MOULDING.

公开(公告)号：US3787530A

公开(公告)日：1974-01-22

申请号：US3787530D

申请日：1972-02-28

Applicant: HOECHST AG

Inventor： BOHN L ,  CHERDRON H ,  FLEISSNER M ,  HERWIG W

IPC: C08L25/12 ,  C08L67/02 ,  C08G39/10

CPC classification number: C08L25/12 ,  C08L67/02 ,  C08L2666/14 ,  C08L25/00

Abstract: CRYSTAL-CLEAR THERMOPLASTIC MOULDING COMPOSITIONS CONSISTING OF A MIXTURE OF LINEAR SATURATED POLYESTERS, THE DIOL COMPONENT OF WHICH CONSISTS OF ETHYLENE GLYCOL AND A DIOL OF THE FORMULA HO-CH2-CR1R2-CH2-OH, WHEREIN R1 REPRESENTS A HYDROGEN ATOM OR A LINEAR OR BRANCHED ALIPHATIC RADICAL HAVING UP TO 4 CARBON ATOMS, AND R2 REPRESENTS A LINEAR OR BRANCHED ALIPHATIC RADICAL HAVING UP TO 4 CARBON ATOMS, AND OF A STYRENE/ACRYLONITRILE COPOLYMER. FROM THESE CRYSTAL-CLEAR THERMOPLASTIC MOULDING COMPOSITIONS, SHAPED ARTICLES HAVING A HIGH TRANSPARENCY AND A HIGH GLOSS CAN BE MANUFACTURED, IN PARTICULAR ACCORDING TO THE INJECTION-MOULDING PROCESS. OWING TO THEIR GOOD MOULD RELEASE PROPERTIES, THEIR EXCELLENT DIMENSIONAL STABILITY, AS WELL AS THEIR HIGH IMPACT STRENGTH, TOGETHER WITH FAVOURABLE HARDNESS VALUES, THE MOULDING COMPOSITIONS ARE PARTICULARLY SUITABLE FOR THE MANUFACTURE OF HIGH-QUALITY SHAPED ARTICLES.

公开(公告)号：US3835096A

公开(公告)日：1974-09-10

申请号：US28918272

申请日：1972-09-14

Applicant: HOECHST AG

Inventor： MUECK K ,  CHERDRON H ,  FISCHER E

IPC: C08K5/00 ,  C08G1/02

CPC classification number: C08K5/00 ,  Y10S260/43 ,  C08L59/02

Abstract: POLYACETALS. I.E. HOMOPOLYMERS OF FORMALDEHYDE OR OF TRIOXANE OR COPOLYMERS OF TRIOXANE WITH MONOFUNCTIONALLY REACTING COMPOUNDS SUCH AS CYCLIC ETHERS OR CYCLIC ACETALS AND POSSIBLY POLYFUNCTIONALLY REACTING COMPOUNDS CAN BE PROTECTED BY ADDITION OF STABILIZERS AGAINST THE ACTION OF HEAT AND OXYGEN. THEY CAN, HOWEVER, BE DEGRADED BY THE ACTION OF ULTRA-VIOLET LIGHT IF THEY CONTAIN LIGHT SENSITIZERS, FOR EXAMPLE ANTHRONE. THE POLYACETALS ARE SUITABLE FOR THE MANUFACTURE OF SHAPED ARTICLES, ESPECIALLY SHEETS.

公开(公告)号：US3770669A

公开(公告)日：1973-11-06

申请号：US3770669D

申请日：1972-04-14

Applicant: HOECHST AG

Inventor： BRINKMANN L ,  HERWIG W ,  RESKE E ,  CHERDRON H

IPC: C08G69/48 ,  C08J9/02 ,  C08J9/04 ,  C08G53/08

CPC classification number: C08J9/04 ,  C08G69/48 ,  C08J9/02 ,  C08J2377/00

Abstract: THERE IS DISCLOSED AND CLAIMED A PROCESS FOR THE PRODUCTION OF CELLULAR PLASTICS FROM POLYAMIDES, WHICH EXHIBIT MELTING RANGES NEAR TO OR ABOVE THEIR DECOMPOSITION TEMPERATURES OR POOR OR NO SOLUBILITY AT ALL IN SOLVENTS OR WHICH EXHIBIT BOTH OF THESE PROPERTIES AT THE SAME TIME, THE PROCESS WHICH COMPRISES PROCESSING POLYAMIDES CARRYING SUBSTITUENTS AT THE AMIDE NITROGEN, FROM THE MELT OR FROM THE SOLUTION AND SPLITTING-OFF PARTIALLY OR TOTALLY THE N-SUBSTITUENTS TO YIELD CELLULAR PLASTICS BY THE FOAMING ACTION OF THE UNSATURATED COMPOUNDS WHICH ORIGINATE FROM THE N-SUBSTITUENTS DURING THE SPLITTING-OFF PROCESS. THIS FOAMING ACTION IS AUGMENTED BY ADDITIONALLY USING FOAMING OR EXPANDING AGENTS AND/OR REDUCING THE PRESSURE DURING THE SPLITTING-OFF PROCESS.