Patent GB-839187-A (GB)
Title: Improvements in or relating to the manufacture of cellular polymeric materials
Inventor: PACKER ERIC ARTHUR
IPC: C08J9/00
Filed: 1955-03-04
Abstract: Cellular materials are prepared by reaction between a diisocyanate, a polyester, and, if necessary, water, the reaction mixture containing an alkyl phenol-ethylene oxide condensate containing 8-20 mols. of ethylene oxide per mol. of alkyl phenol.  Alkyl phenols mentioned are p-(a ,a ,g ,g -tetramethylbutyl) phenol; p-dodecylphenol; 2,4 - di - tert. - butylphenol; 2,4 - dioctylphenol; p - octadecylphenol; mixed octyl phenols or octyl cresols; 4-methyl-6-iso-octyl phenol; myristyl phenol from cashew nut shell oil.  Suitable polyesters are described in Specification 790,420.  The usual diisocyanates are referred to. Tertiary amines, e.g. triethylamine, N,N - dimethylcyclohexylamine, di - (b  - diethylaminoethyl) - adipate, N,N - diethylbenzylamine, N - ethylhexamethyleneimine, N-ethylpiperidine and a -methylbenzyl dimethylamine may be used as catalysts.  Preparation may be discontinuous or continuous as in Specification 839,183 and the ingredients may be mixed in any order.  Conventional additives may be included at any stage, e.g. as dried powders or, as claimed in Specification 839,189, as pastes.  In Example (1) a mixture of water, a condensate of an alkyl phenol with 10 mols. of ethylene oxide, di-(b -diethylaminoethyl) adipate and mixed toluylene 2,4 and 2,6-diisocyanates is blended with a liquid copolymer of diethylene glycol, pentaerythritol and adipic acid and the blend is discharged into moulds to form resilient cellular articles.  In Example (2) a condensate of octylphenol with 10 mols. of ethylene oxide is used and the catalyst is N-dimethylcyclohexylamine. Specifications 553,733 and 579,340 also are referred to.  Reference has been directed by the Comptroller to Specification 797,299.ALSO:Cellular materials are prepared by reaction between a diisocyanate, a polyester, and, if necessary, water, the reaction mixture containing an alkyl phenol-ethylene oxide condensate containing 8-20 mols of ethylene oxide per mol of alkyl phenol. Alkyl phenols mentioned are p ( a , a , j, j,-tetramethylbutyl) phenol; p-dodecylphenol; 2.4 di-tert butyl-phenol; 2.4-dioctylphenol; p octadecylphenol; mixed octyl phenols or octyl cresols 4-methyl-6-iso-octyl phenol; myristyl phenol from cashew nut shell oil.  Suitable polyesters are described in Specification 790,420.  The usual diisocyanates are referred to. Tertiary amines, e.g. trithylamine, N.N.-dimethyl-cyclohexylamine, di(b  diethylaminoethyl) adipate, N.N-diethylbenzylamine, N-ethylhexamethyleneimine, N-ethyl piperidine and a -methylbenzyl dimethylamine may be used as catalysts.  Preparation may be discontinuous or continuous as in Specification 839,183 and the ingredients may be mixed in any order.  Conventional additives may be included at any stage, e.g. as dry powders or, as claimed in Specification 839,189, as pastes.  In Example (1) a mixture of water, a condensate of an alkyl phenol with 10 mols of ethylene oxide, di-(b -diethylaminoethyl) adipate and mixed toluylene 2.4 and 2.6 diisocyanates is blended with a liquid copolymer of diethylene glycol, pentaerythritol and adipic acid and the blend is discharged into moulds to form resilient cellular articles.  In Ex. 2 a condensate of octylphenol with 10 mols of ethylene oxide is used and the catalyst is N-dimethylcyclohexylamine. Specifications 553,733 and 579,340 also are referred to.  Reference has been directed by the Comptroller to Specification 797,299.