公开(公告)号：US3840628A

公开(公告)日：1974-10-08

申请号：US25925072

申请日：1972-06-02

Applicant: BASF AG

Inventor： STASTNY F ,  TRIESCHMANN H ,  GAETH R ,  KOERNER H

IPC: B29C67/20 ,  B29C70/66 ,  C08J9/35 ,  B29D27/04

CPC classification number: C08J9/35 ,  B29C67/207 ,  B29C70/66 ,  B29K2105/165 ,  C08J2375/04 ,  Y10S264/05 ,  Y10T428/2991

Abstract: 1. IN A PROCESS FOR THE MANUFACTURE OF RESILIENT COMPOUND FOAMS WHEREIN A REACTION MIXTURE OF (A) PREFOAMED SOFT ELASTIC OLEFIN POLYMER PARTICLES HAVING A PARTICLE SIZE OF FROM ABOUT 5 TO 50 MM. AND (B) 20 TO 100 G., PER LITER OF SAID PREFOAMED PLASTICS PARTICLES, OF A FOAMABLE MIX OF POLYISOCYANATES, POLYOLS, WATER, CATALYST AND, OPTIONALLY, (C) OTHER AUXILIARIES, PLASTICIZERS, FINGICIDES, BACTERICIDES, ING OF STABILIZERS, PLASTICIZERS, FUNGICIDES, BACTERICIDES, FLAME RETARDANTS, DYES AND FILLERS IS FOAMED IN A MOLD HAVING A MOVABLE LID, THE IMPROVEMENT WHICH COMPRISES: (1) COATING WATER ONTO SAID PREFOAMED SOFT ELASTIC OLEFIN POLYMER PARTICLES, SAID PARTICLES HAVING A SMOOTH SURFACE AND BEVELLED OR ROUNDED EDGES AND FURTHER HAVING A BULK DENSITY OF FROM 5 TO 100 G./L.; (2) PLACING THE REMAINING COMPONENTS OF SAID FOAMABLE MIX IN THE MOLD WITH A LAYER OF SAID (3) COVERING SAID REMAINING COMPONENTS OF SAID FOAMABLE MIX IN THE MOLD WITH A LAYER OF SAID PREFOAMED SOFT ELASTIC OLEFIN POLYMER PARTICLES COATED WITH WATER; (4) CLOSING THE MOLD; (5) CAUSING SAID COATED PREFOAMED SOFT ELASTIC OLEFIN POLYMER PARTICLES TO CONTACT SAID REMAINING COMPONENTS OF SAID FOAMABLE MIX BY TURNING SAID MOLD; AND (6) ALLOWING THE REACTION MIXTURE TO FOAM WHEREBY A POLYURETHANE FOAM IS FORMED IN WHICH FROM 200 TO 800 ML. OF THE PREFOAMED SOFT ELASTIC OLEFIN POLYMER PARTICLES PER LITER OF FOAM ARE EMBEDDED IN SAID FOAM.

公开(公告)号：US3755518A

公开(公告)日：1973-08-28

申请号：US3755518D

申请日：1970-05-28

Applicant: BASF AG

Inventor： KOERNER H ,  STASTNY F ,  GAETH R

IPC: C08J9/35 ,  B29D27/04 ,  B29H3/02 ,  B32B25/02

CPC classification number: C08J9/35 ,  C08J2321/00 ,  Y10S264/07 ,  Y10S264/16 ,  Y10T428/249972 ,  Y10T428/249977

Abstract: PRODUCTION OF FLEXIBLE AND RESILIENT FOAMED PLASTICS BY FOAMING A VULCANIZABLE LATEX, MIXING THE FOAMED PRODUCT WITH EXPANDED PARTICLES OF AN OLEFIN POLYMER, FILLING THE MIXTURE INTO A MOLD, HEATING THE MIXTURE THEREIN TO A TEMPERATURE OF FROM 70* TO 150* C., REMOVING THE FLEXIBLE AND RESILIENT FOAM THEREFROM AND DRYING SAID FOAM. THE FLEXIBLE AND RESILIENT FOAMED PLASTICS ARE USED AS UPHOLSTERY PADDING, FOR THERMAL INSULATION AND AS SHOCKABSORBING MATERIALS.