Global Patent Index - EP 0970068 A1

EP 0970068 A1 2000-01-12 - PROCESS FOR THE PREPARATION OF A CARBOXYLIC ANHYDRIDE

Title (en)

PROCESS FOR THE PREPARATION OF A CARBOXYLIC ANHYDRIDE

Title (de)

VERFAHREN ZUR HERSTELLUNG EINES CARBONSÄUREANHYDRIDS

Title (fr)

PROCEDE POUR PREPARER UN ANHYDRIDE CARBOXYLIQUE

Publication

EP 0970068 A1 (EN)

Application

EP 98905384 A

Priority

  • EP 9800543 W
  • JP 2982697 A

Abstract (en)

[origin: WO9833787A1] The present invention provides a colorless and transparent carboxylic anhydride with excellent stability in a liquid state at room temperature which is useful in uses such as a curing agent for epoxy resins, a liquid state encapsulant for semiconductors, and a liquid state encapsulant for light emission diodes. Said carboxylic anhydride which is a liquid at 20 DEG C containing a carboxylic anhydride not having carbon-carbon double bond such as 3-isobutyl-5,6-dimethylcyclohexane-1,2-dicarboxylic anhydride, 3-( beta -methylbutyl)-5-methylcyclohexane-1,2-dicarboxylic anhydride, and 4-isohexylcyclohexane-1,2-dicarboxylic anhydride is prepared by forming an acid anhydride compound having a cyclohexane ring by a Diels-Alder reaction of a diene-hydrocarbon or triene-hydrocarbon having a carbon number of 10 with maleic anhydride, followed by carrying out a stereo-isomerization in the presence of a catalyst, and further carrying out hydrogenation of said reaction product.

IPC 1-7 (main, further and additional classification)

C07D 307/89

IPC 8 full level (invention and additional information)

C07D 307/89 (2006.01); C07B 61/00 (2006.01); C07C 51/567 (2006.01)

CPC (invention and additional information)

C07C 51/567 (2013.01)

Combination set (CPC)

  1. C07C 51/567 + C07C 61/24
  2. C07C 51/567 + C07C 61/09

Citation (search report)

See references of WO 9833787A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE

EPO simple patent family

WO 9833787 A1 19980806; AU 6098798 A 19980825; AU 726989 B2 20001130; BR 9807293 A 20000321; CA 2278587 A1 19980806; CN 1246115 A 20000301; EP 0970068 A1 20000112; JP H10212285 A 19980811; KR 20000070591 A 20001125; NZ 336444 A 20000825; ZA 9800646 B 19980730

INPADOC legal status


2002-10-23 [18R] REFUSED

- Effective date: 20020601

2002-01-16 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20011205

2001-12-12 [RTI1] TITLE (CORRECTION)

- Free text: PROCESS FOR THE PREPARATION OF A CARBOXYLIC ANHYDRIDE

2000-01-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990617

2000-01-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE