CROSSLINKABLE AND FOAMING POLYESTER-POLYURETHANE (HYBRID) RESIN MOULDING COMPOSITIONS, WITH FOAMING CHARACTERISTICS FOR CLOSED MOULD APPLICATIONS

摘要

IT CONCERNS A CROSSLINKABLE AND FOAMING POLYESTER-POLYURETHANE RESIN MOULDING COMPOSITION, COMPRISING: AN A COMPONENT, COMPRISING: A1) AT LEAST ONE POLY-FUNCTIONAL ISOCYANATE COMPOUND, AND A2) AT LEAST ONE FREE RADICAL POLYMERISATION INITIATOR A B COMPONENT, COMPRISING BY WEIGHT : B1) 100 PARTS OF AT LEAST ONE POLYOL RESIN COMPRISING :- B11) 50 TO 80 PARTS OF AT LEAST ONE ETHYLENICALLY UNSATURATED POLYESTER POLYOL - B12) 20 TO 50 PARTS OF AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER, WITH, B11), BEING THE REACTION PRODUCT OF : A) AN ACID COMPONENT COMPRISING : A1) AT LEAST ONE ETHYLENICALLY UNSATURATED DIACID, AND A2) AT LEAST ONE SATURATED DIACID WITH A1/A2 MOLAR RATIO SO VARYING TO HAVE AN UNSATURATION CONTENT IN B11) FROM 0.25/1 TO 5/1, AND, B) A DIOL COMPONENT IN EXCESS WITH RESPECT TO COMPONENT A) B2) FROM 0.01 TO 1.1 PARTS OF WATER, B3) OPTIONALLY, UP TO 35% OF AT LEAST ONE HYDROXY ALKYL (METH)ACRYLATE, B4) AT LEAST ONE CATALYST OF THE ISOCYANATE / HYDROXYL REACTION, B5) AT LEAST ONE ACCELERATOR FOR THE FREE RADICAL INITIATOR DECOMPOSITION, B6) AT LEAST ONE FOAM STABILISER, B7) OPTIONALLY, FILLERS AND/OR OTHER ADDITIVES THE SAID COMPOSITION BEING FREE OF ANY PRIMARY OR OF SECONDARY AMINE AND OF ANY POLYOL OF LOW MW CHAIN EXTENDER. THE INVENTION FURTHER RELATES TO A PROCESS OF PREPARATION AND SPECIFIC USES IN LIGHT WEIGHT ARTICLES IN SANITARY, BUILDING OR AUTOMOTIVE USES.