Global patent index - EP 0971975 A2

EP 0971975 A2 2000-01-19 - A METHOD OF PRODUCING AN EXPANDED MATERIAL

Title (en)

A METHOD OF PRODUCING AN EXPANDED MATERIAL

Title (de)

VERFAHREN ZUR HERSTELLUNG VON GESCHÄUMTEM MATERIAL

Title (fr)

PROCEDE DE PRODUCTION D'UN MATERIAU EXPANSE OU MOUSSE ET DE CONSTITUANTS, ET APPAREIL POUR METTRE EN OEUVRE CE PROCEDE

Publication

EP 0971975 A2 (EN)

Application

EP 98912627 A

Priority

  • GB 9800891 W
  • GB 9706219 A

Abstract (en)

[origin: WO9842775A2] A process for forming synthetic expanded or foamed materials, such as acid-cured foams, condensation polymers such as phenolic resins. Catalysts, blowing agents and combinations of the two are described along with apparatus for use in the process. The invention includes a process for the preparation of an expanded or foamed material, which comprises the expansion or foaming and subsequent hardening of a polymer or resin by the admixture of an expandable polymer or resin, a catalyst capable of causing hardening of the polymer or resin, a blowing agent capable of generating a gas within the polymer or resin so as to form cells therein and a surfactant capable of stabilising cells formed within the polymer or resin. The process is characterised in that the surfactant is substantially miscible with the blowing agent and the process involves the step of mixing the blowing agent with the surfactant prior to admixing those components with the resin and/or catalyst.

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

C08J 9/14; B29C 44/34

IPC 8 full level (invention and additional information)

B29C 44/34 (2006.01); C08J 9/14 (2006.01)

CPC (invention and additional information)

C08J 9/146 (2013.01); B29C 44/3442 (2013.01); C08J 2361/06 (2013.01)

Citation (search report)

See references of WO 9842775A3

Designated contracting state (EPC)

BE DE ES FR GB IE IT NL SE

EPO simple patent family

WO 9842775 A2 19981001; WO 9842775 A3 19990107; AU 6740798 A 19981020; EP 0971975 A2 20000119; GB 9706219 D0 19970514; NO 994632 A 19991109; NO 994632 D0 19990923

INPADOC legal status

2001-09-05 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20010221

2000-09-20 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20000810

2000-01-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991015

2000-01-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE DE ES FR GB IE IT NL SE