Title:
高分子重縮合物の調製法
Document Type and Number:
Japanese Patent JP2007522273
Kind Code:
A
Abstract:
The invention relates to a process for preparing a high-molecular polycondensate, i.e. a polyester, a polyamide, a polyester-amide, a polycarbonate, or a block copolymer by melt-mixing a polyester, a polyamide, a polycarbonate or a mixture of a polyamide and a polyester with a carbonyl bislactam according to formula (I), in which formula n is an integer of between 3 and 15 and a diepoxide. Preferably said diepoxide is a compound containing epoxy radicals of formula (II), which radicals are linked direct to carbon, oxygen, nitrogen or sulfur atoms, wherein R1 and R3 are both hydrogen, R2 is hydrogen or methyl, and m=0, or wherein R1 and R3, taken together, are -CH2-CH2- or -CH2-CH2-CH2-, in which case R2 is hydrogen and m=0 or 1. The present invention results in a more stable process for the production of a polycondensate with a high molecular mass. Furthermore the polycondensate obtained with the process according to the invention has, even under extreme process conditions such as high temperature, less discoloration. With the process according to the invention a permanent increase in the molecular weight of a polycondensate is obtained in an even faster way than with processes according to the state of the art.
Inventors:
Runes Jens, Jacobs, Antonius
Scortens, Bow Dewin, Jean, Robert
Scortens, Bow Dewin, Jean, Robert
Application Number:
JP2006548185A
Publication Date:
August 09, 2007
Filing Date:
December 29, 2004
Export Citation:
Assignee:
DSM IP ASSETS B.V.
International Classes:
C08G81/00; B29B7/88; C08G63/91; C08G64/42; C08G65/331; C08G65/333; C08G65/48; C08G69/04; C08G69/28; C08G69/44; C08G69/48; C08G85/00; C08J11/06
Domestic Patent References:
| JPH10502099A | 1998-02-24 | |||
| JP2001521576A | 2001-11-06 | |||
| JPH07113043A | 1995-05-02 |
Attorney, Agent or Firm:
Yuichi Yamada
Masakazu Noda
Yoshinori Shimizu
Masakazu Noda
Yoshinori Shimizu