公开(公告)号：JPH11147994A

公开(公告)日：1999-06-02

申请号：JP22260198

申请日：1998-08-06

Applicant: DEGUSSA

Inventor： KELLER BRUNO DR ,  SCHAUHOFF STEPHANIE ,  DORN KLAUS DR ,  ALT HARTMUT ,  MICHELCHEN DIETRICH

IPC: B29C47/00 ,  B29K59/00 ,  C08K5/14 ,  C08K5/37 ,  C08L59/00

Abstract: PROBLEM TO BE SOLVED: To obtain a reinforced or nonreinforced polyoxymethylene molding compsn. SOLUTION: This compsn. comprises at least one polyoxymethylene homo- and/or copolymer (i), at least one conventional additive (ii), and at least one polymeric plastics material (iii) and is characterizd in that (iii) is a copolymer obtainable by the bulk polymn. of a mixture of 60-90 pts.wt. at least one (meth) acrylate (A), 10-40 pts.wt. at least one (meth)acrylamide (B), 0.2-5 pts.wt. (based on 100 pts.wt. (A+B) mol.wt. regulator (C), and up to 2 pts.wt. (based on 100 pts.wt. A+B) lipophilic free-radical polymn. initiator and in that the compsn. contains (iii) in an ant. of 0.01-2 pts.wt. [based on (i)+(ii)].

公开(公告)号：JPH1087958A

公开(公告)日：1998-04-07

申请号：JP23359097

申请日：1997-08-29

Applicant: DEGUSSA

Inventor： KELLER BRUNO DR ,  SCHAUHOFF STEPHANIE DR ,  DORN KLAUS DR ,  DIETRICH MICHELCHEN ,  HARTMUT ALT

IPC: C08K5/13 ,  C08K5/134 ,  C08L59/00

Abstract: PROBLEM TO BE SOLVED: To efficiently carry out stabilization of a polyacetal subjected to oxidative decomposition and obtain a high-quality molding material, by mixing the polyacetal with a specific sterically hindering phenol ester of dialkylene glycol in an acting amount. SOLUTION: A polyacetal such as polyoxymethylene is mixed with preferably 0.05-2wt.% (based on polyacetal) sterically hindering phenol ester of dialkylene glycol represented by the formula to stabilize the polyacetal subjected to oxidative decomposition according to ordinary method.

公开(公告)号：JPH10328569A

公开(公告)日：1998-12-15

申请号：JP14128798

申请日：1998-05-22

Applicant: DEGUSSA

Inventor： SAUER JOERG DR ,  HAAS THOMAS DR ,  KELLER BRUNO DR ,  FREUND ANDREAS DR ,  BURKHARDT WERNER ,  MICHELCHEN DIETRICH ,  BERWEILER MONIKA

IPC: B01J25/00 ,  B01J37/00 ,  C07B31/00 ,  C07B61/00 ,  C07C209/48

Abstract: PROBLEM TO BE SOLVED: To obtain a catalyst capable of advantageously performing the hydrogenation, dehydrogenation and hydrocracking of an organic and inorganic body by forming the catalyst only from a catalytic alloy and specifying total pore volume or the like in a molded metal-fixed bed catalyst containing a catalytic metal, an alloy component capable of eluting and if necessary, a co-catalyst. SOLUTION: In the metal-fixed bed catalyst, the catalyst is formed only from the catalytic alloy, attains 0.1-0.6 ml/g total pore volume and a part of an outside layer 0.1-2.0 mm thick from the surface is activated by the elusion of the alloy component capable being completely or partially eluted. And as the preferable catalyst component, nickel, cobalt, copper or iron and as the alloy component capable of eluting, aluminum, zinc or silicon is used. And the weight ratio of the catalyst metal and the alloy component capable of being eluted is setted to (30:70) to (70:30). Further s the co-catalyst,

公开(公告)号：DE19735277C2

公开(公告)日：1999-07-15

申请号：DE19735277

申请日：1997-08-14

Applicant: DEGUSSA

Inventor： KELLER BRUNO DR ,  DORN KLAUS DR ,  LACH HEINZ ,  ALT HARTMUT ,  MICHELCHEN DIETRICH

IPC: B01J19/02 ,  C08G2/00 ,  C09D159/02 ,  C09D159/04 ,  C08G2/10 ,  C09D159/00

公开(公告)号：BR9804284A

公开(公告)日：1999-12-14

申请号：BR9804284

申请日：1998-08-07

Applicant: DEGUSSA

Inventor： KELLER BRUNO DR ,  SCHAUHOFF STEPHANIE DR ,  DORN KLAUS DR ,  ALT HARTMUT ,  MICHELCHEN DIETRICH

IPC: B29C47/00 ,  B29K59/00 ,  C08K5/14 ,  C08K5/37 ,  C08L59/00 ,  C08L59/02 ,  C08L59/04

Abstract: A polyoxymethylene moulding composition (I) comprises (A) a polyoxymethylene homo- and/or copolymer; (B) conventional additives; and (C) 0.01-2 parts weight (pts. wt.) (w.r.t. (A) + (B)) of a polymeric additive to improve thermal stability, consisting of a copolymer prepared by polymerisation of (C1) 60-90 pts. wt. of a (methy)acrylate; (C2) 10-40 pts. wt. of a (meth)acrylamide; (C3) 0.2-5 pts. wt. of a molecular weight regulator (w.r.t. 100 pts. wt. (C1) and (C2)); and (C4) upto 2 pts. wt. of a lipophilic radical polymerisation initiator (w.r.t. 100 pts. wt. (C1) and (C2)). Also claimed are (i) production of a moulding article or film from (I) by melting and mixing the components in an extruder at 150-260 degrees C and processing to produce a reinforced or non-reinforced article or film; and (ii) the resulting moulded article, semi-finished product or film.

公开(公告)号：DE19734415A1

公开(公告)日：1998-03-05

申请号：DE19734415

申请日：1997-08-08

Applicant: DEGUSSA

Inventor： KELLER BRUNO DR ,  SCHAUHOFF STEPHANIE DR ,  DORN KLAUS DR ,  ALT HARTMUT ,  MICHELCHEN DIETRICH

IPC: C08K5/13 ,  C08K5/134 ,  C08L59/00 ,  C08L59/02 ,  C07C69/732 ,  C09K15/08

Abstract: A process for stabilising POM (polyacetal) towards oxidative degradation, by mixing the POM with an effective amount of a sterically hindered phenol ester of a dialkylene glycol with formula (I).

公开(公告)号：DE19735277A1

公开(公告)日：1999-02-18

申请号：DE19735277

申请日：1997-08-14

Applicant: DEGUSSA

Inventor： KELLER BRUNO DR ,  DORN KLAUS DR ,  LACH HEINZ ,  ALT HARTMUT ,  MICHELCHEN DIETRICH

IPC: B01J19/02 ,  C08G2/00 ,  C09D159/02 ,  C09D159/04 ,  C08G2/10 ,  C08L59/02 ,  C08L59/04 ,  C09D159/00

Abstract: The vessel for polymerizing formals has an inner surface of polyoxymethylene homo- or copolymers. POLYMERS - The polyoxymethylene copolymers contain up to 50 (0.3-10) mol.% repeating units of formula (I). SPECIFIC SUBSTANCES - The entire vessel is coated with polyoxymethylene homo- or copolymer.

公开(公告)号：DE19834837A1

公开(公告)日：1999-02-11

申请号：DE19834837

申请日：1998-08-01

Applicant: DEGUSSA

Inventor： KELLER BRUNO DR ,  SCHAUHOFF STEPHANIE DR ,  DORN KLAUS DR ,  ALT HARTMUT ,  MICHELCHEN DIETRICH

IPC: B29C47/00 ,  B29K59/00 ,  C08K5/14 ,  C08K5/37 ,  C08L59/00 ,  C08L33/04 ,  C08L33/26 ,  C08J5/18 ,  C08G2/00

Abstract: A polyoxymethylene moulding composition (I) comprises (A) a polyoxymethylene homo- and/or copolymer; (B) conventional additives; and (C) 0.01-2 parts weight (pts. wt.) (w.r.t. (A) + (B)) of a polymeric additive to improve thermal stability, consisting of a copolymer prepared by polymerisation of (C1) 60-90 pts. wt. of a (methy)acrylate; (C2) 10-40 pts. wt. of a (meth)acrylamide; (C3) 0.2-5 pts. wt. of a molecular weight regulator (w.r.t. 100 pts. wt. (C1) and (C2)); and (C4) upto 2 pts. wt. of a lipophilic radical polymerisation initiator (w.r.t. 100 pts. wt. (C1) and (C2)). Also claimed are (i) production of a moulding article or film from (I) by melting and mixing the components in an extruder at 150-260 deg C and processing to produce a reinforced or non-reinforced article or film; and (ii) the resulting moulded article, semi-finished product or film.

公开(公告)号：DE19721897A1

公开(公告)日：1998-12-03

申请号：DE19721897

申请日：1997-05-26

Applicant: DEGUSSA

Inventor： SAUER JOERG DR ,  HAAS THOMAS DR ,  KELLER BRUNO DR ,  FREUND ANDREAS DR ,  BURKHARDT WERNER ,  MICHELCHEN DIETRICH ,  BERWEILER MONIKA

IPC: B01J25/00 ,  B01J37/00 ,  C07B31/00 ,  C07B61/00 ,  C07C209/48 ,  B01J25/02 ,  C07B35/04 ,  C07B35/02 ,  C07B33/00 ,  C07C27/02

Abstract: A formed metal solid-bed catalyst, consisting entirely of catalyst alloy (and possibly promoters) with a total pore vol. of 0.1-0.6 ml/g and with a surface shell 0.1-2.0 mm thick which is activated by complete or partial leaching of an extractable alloy component (I). Also claimed is a process for the production of thE catalyst . Preferably the catalyst metal is nickel, cobalt, copper and/or iron, and component (I) is aluminium, zinc or silicon. The catalyst may also contain up to 15 wt% chromium, iron, cobalt, tantalum, molybdenum and/or titanium as promoters.