摘要:
A FOUNDRY PROCESS IS DISCLOSED INCLUDING THE USE OF NOVEL CORE BINDERS WHICH ARE PREPARED BY FIRST FORMING A PREPOLYMER FROM AN AROMATIC POLYISOCYANATE AND NONDRYING CASTOR OIL; THEN MIXING THE PREPOLYMER WITH A HIGH MOLECULAR WEIGHT HYDROXY CONTAINING MATERIAL AND AN ACCELERATOR. THE HIGH MOLECULAR WEIGHT HYDROXY CONTAINING MATERIAL CAN BE EITHER AN ALIPHATIC POLYETHER POLYOL OR AN AROMATIC POLYETHER POLYOL. THE ACCELERATOR CAN BE EITHER A METAL NAPHTHENATE, ORGANOTIN COMPOUND, OR TERTIARY AMINE. THE PREPOLYMER MAY ALSO INCLUDE TUNG OIL.
摘要:
A process for producing a bound aggregate building material composition comprising: (a) forming a monomeric binder mixture of specified amounts of monomeric furfuryl alcohol and a silane coupling agent of the general formula: X-R''-Si(OR'''')3 wherein R'' is a short chain alkylene radical; R'''' is aryl, substituted aryl, alkyl, or heteroalkyl; and X is amino, mercapto, epoxy, or glycidoxy; (b) forming a mixture of specified amounts of aggregate and acidic catalyst; (c) admixing specified amounts of the monomeric binder with specified amounts of the aggregate-acidic catalyst mixture.
摘要:
GLASS FIBERS ARE BOUND WITH A FURFURYL ACOHOL-FORMALDEHYDE RESIN IN A BINDER CONTAINING FURFURAL, A HIGH CATALYST LEVEL, AND A SILANE. THE RESULTING ARTICLE IS CURED AT TEMPERATURES BELOW 100*C.
摘要:
GLASS FIBERS ARE BOUND WITH A FURFURYL ALCOHOL-FORMALDEHYDE RESIN IN A BINDER CONTAINING FURFURAL, A HIGH CATALYST LEVEL, AND A SILANE. THE RESULTING ARTICLE IS CURED AT TEMPERATURES BELOW 100*C.