摘要:
A process for preparing polyurethane compositions is disclosed which comprises simultaneously reacting: A. A POLYOL MADE UP OF AT LEAST ONE HYDROXYL-TERMINATED POLYETHER DIOL, HYDROXYL-TERMINATED POLYESTER DIOL OR MIXTURE THEREOF; B. A POLYISOCYANATE OR QUASI-PREPOLYMER CONTAINING FREE ISOCYANATE; C. A MIXTURE OF POLYFUNCTIONAL CHAIN EXTENDERS MADE UP OF BUTANEDIOL AND A SUFFICIENT AMOUNT OF AT LEAST ONE OTHER DIFUNCTIONAL CHAIN EXTENDER WHICH IS SOLUBLE IN THE POLYOL TO RENDER THE MIXTURE SOLUBLE IN THE POLYOL, THE BUTANEDIOL BEING PRESENT IN THE POLYOL AT A LEVEL EXCEEDING THE MAXIMUM SOLUBILITY OF THE BUTANEDIOL IN THE ABSENCE OF THE SOLUBLE DIFUNCTIONAL CHAIN EXTENDER; AND D. A CATALYST.
摘要:
In an apparatus for the liquid injection molding of multicomponent thermosetting reaction mixtures having holding tanks for storing each component of the reaction mixture under vacuum, recirculating and metering pumps for recirculating each component to its respective holding vessel between injection cycles and alternately delivering metered amounts of each component to a mixing and injecting unit during the injection cycle and a mold having an internal configuration or cavity conforming to the surfaces of the article to be molded, a movable bottom plate and an injection port and short injection channel terminating in a gate positioned within the mold cavity at a point relatively remote from the geometric center or point of balance of the bottom plate for molding the reaction mixture to the desired configuration, an improvement is disclosed which comprises: A. MEANS FOR CONTINUOUSLY RECIRCULATING ONE PART OF EACH REACTION COMPONENT TO ITS RESPECTIVE HOLDING TANK WHILE SIMULTANEOUSLY DELIVERING THE OTHER PART OF THE REACTION COMPONENT TO A METERING, MIXING, AND INJECTING UNIT FOR INJECTING A PREDETERMINED AMOUNT OF HOMOGENEOUS REACTION MIXTURE INTO THE INJECTION PORT OF A MOLD UNDER SUBSTANTIALLY CONSTANT PRESSURE ONLY FOR THE DURATION OF THE INJECTION CYCLE; B. MEANS FOR PERMITTING DISCHARGE OF THE REACTION MIXTURE FROM THE METERING, MIXING, AND INJECTING UNIT INTO THE INJECTION PORT OF THE MOLD ONLY FOR THE DURATION OF THE INJECTION CYCLE; C. MEANS FOR MAINTAINING SUBSTANTIALLY CONSTANT PRESSURE FOR THAT PART OF THE REACTION COMPONENT BEING RECIRCULATED TO ITS RESPECTIVE HOLDING TANK REGARDLESS OF THE STATE OF OPERATION OF MEANS (B); AND D. AT LEAST ONE INJECTION CHANNEL EXTENDING FROM THE INJECTION PORT OF THE MOLD AND TERMINATING IN AT LEAST ONE GATE POSITIONED WITHIN THE MOLD CAVITY AT A POINT RELATIVELY PROXIMATE TO THE GEOMETRIC CENTER OR POINT OF BALANCE OF THE BOTTOM PLATE, THE INJECTION CHANNEL BEING DEFINED WITHIN THE WALL OF THE MOLD CAVITY AT A LEVEL BELOW THE UPPER SURFACE OF THE BOTTOM PLATE WHEN THE BOTTOM PLATE IS IN THE POSITION FOR THE COMMENCEMENT OF THE INJECTION CYCLE WITH THE BOTTOM PLATE WALL SERVING AS ONE WALL OF THE INJECTION CHANNEL, OR THE INJECTION CHANNEL IS DEFINED WITHIN THE BOTTOM PLATE WALL WITH THE WALL OF THE MOLD CAVITY SERVING AS ONE WALL OF THE INJECTION CHANNEL, OR THE INJECTION CHANNEL IS DEFINED WITHIN THE WALL OF THE MOLD CAVITY ANDA THE BOTTOM PLATE WALL IN THE AFORESAID MANNER WITH THE FLOW OF REACTION MIXTURE THROUGH THE GATE DURING THE INJECTION CYCLE BEING UNINTERRUPTED WHEN THE BOTTOM PLATE IS IN POSITION FOR THE COMMENCEMENT OF THE INJECTION CYCLE AND INTERRUPTED WHEN THE BOTTOM PLATE IS IN THE POSITION AT THE CONCLUSION OF THE INJECTION CYCLE.
摘要:
THERE IS DISCLOSED A PROCESS FOR THE MANUFACTURE OF NOVEL CHAIN EXTENDERS OR MIXTURES THEREOF FOR USE IN PREPARING POLYURETHANES COMPRISING REACTION OF AN ALIPHATIC, CYCLOALIPHATIC, HETEROCYCLIC, OR AROMATIC DIAMINE OR AMINO ALCOHOL, WITH FROM ABOUT 1.0 TO ABOUT 1.5 MOLES OF AN EPSILON-CAPROLACTONE OR A 6-HYDROXYCAPROIC ACID PER MOLE OF ACTIVE AMINE FUNCTIONAL GROUP OF SAID DIAMINE OR AMINO ALCOHOL, AT A TEMPERATURE OF FROM 100 TO 300*C., IN THE PRESENCE OR ABSENCE OF A METALLIC CATALYST. THERE IS FURTHER DISCLOSED A PROCESS FOR THE MANUFACTURE OF POLYURETHANE POLYMERS WHICH COMPRISES REACTING A MEMBER OF THE GROUP CONSISTING OF (A) POLYESTERS PREPARED FROM DICARBOXYLIC ACIDS AND GLYCOLS, (B) POLYESTERS PREPARED FROM EPSILON-CAPROLACTONES OR 6-HYDROXYCAPROIC ACIDS, OR (C) POLYETHERS PREPARED FROM 1,2-ALKYLENE OXIDES AND/OR TETRAHYDROFURAN, WITH ORGANIC POLYIDOCYNATES AND A CHAIN EXTENDER PREPARED AS DESCRIBED ABOVE.
摘要:
THERE IS DISCLOSED A PROCESS FOR THE PRODUCTION OF POLYURETHANES FROM 6-ACYLOXYCAPROCIC ACIDS AND ALKYL 6-HYDROXYCAPROATES, COMPRISING CONVERTIN THE 6-ACYLOXYCAPROIC ACIDS- OR ALKYL 6-HYDROXYCAPROATES BY HYDROLYSIS TO MIXUTRES OF THE CORRESPONDING 6-HYDROXYCAPROIC ACIDS AND OLIGOMERS THEREOF, THE HYDROLYSIS REACTIONS BEING CONDUCTED IN THE PRESENCE OF WATER, AND PREFERABLY IN THE PRESENCE OF A HYDROGEN ION CONTAINING CATALYST THAT IS READILY REMOVABLE FROM THE HYDROLYSTAE; REMOVING THE ACYLOXY ACIDS OR ALKANOLS, FOR EXAMLE, FORMIC ACID OR METHANOL, WHICH ARE FORMED DURING THE HYDROLYSIS REACTION, CONVERTING THE ACID HYDROLYSATE TO A POLYESTER POOLYOL BY REACTION WITH AN ORGANIC POLYFUNCTIONAL AGENT AND THEREAFTER CONVERTING THE POLYESTER POLYOL TO A POLYURETHANE.
摘要:
FLEXIBLE POLYESTER-URETHANE FOAMS HAVING EXCELLENT HUMID AGING PROPERTIES, ABILITY TO BE FLAME-LAMINATED AND TO WITHSTAND DRY-CLEANING SOLVENT, PREPARED BY REACTING LIQUID POLYESTERS CONTAINING ABOUT 10 PERCENT TO 72 PERCENT BY WEIGHT OF THE EPSILON-OXYCAPROYL UNIT
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WITH AN ORGANIC POLYISOCYANATE, WATER AND OPTIONALLY, OTHER BLOWING AGENTS A CATALYST AND A SURFACTANT, AND PROCESSES FOR THEIR PREPARTION. LIQUID POLYESTERS HAVING HYDROXYL EQUIVALENT OF FROM ABOUT 800 TO ABOUT 1400, BY REACTION OF ABOUT 10 TO 73 PERCENT BY WEIGHT OF EPSILON-CAPROLACTONE, OR ALTERANATIVELY ABOUT 12 TO 80 PERCENT BY WEIGHT OF A MIXTURE OF 6-HYDROXYCAPROIC ACID AND ITS LOWER OLIGOMERS, WITH FROM ABOUT 90 TO ABOUT 28 PERCENT BY WEIGHT OF A MIXTURE COMPRISING REACTED SEGMENTS OF AN ORGANIC DICARBOXYLIC ACID, AN ALKYLENE GLYCOL AND A TRIOL SUCH AS TRIMETHYLOPROPANE, AND PROCESSES FOR THEIR PREPRARATION.
摘要:
Copolyesterpolyols comprising the equilibration product of at least two polyols manufactured by heating at least two high molecular weight polyols, at least one of which is a polyester polyol, to a temperature of 150* to about 300* C., preferably in the presence of a polyesterification and/or ester interchange catalyst, for a sufficient period of time to produce new copolyesterpolyols which have substantially constant melting points. Such copolyesterpolyols have approximately the melting point as the combination of the ingredients synthesized by a normal copolyesterification technique. Also provided are polyurethane products derived from the copolyesterpolyols comprising solid urethane elastomers, microcellular elastomers, flexible and rigid polyurethane foams, injection-molding resins, prepolymers and the like, prepared by reaction of the copolyesterpolyols with an organic polyisocyante and a chain extender.
摘要:
A BULLET PROOF VEHICLE TIRE HAVING A PERIPHERAL COATING OF SOLID POLYURETHANE ELASTOMERS AND A CORE OF PREDOMINANTLY OPEN-CELLED MICROCELLULAR POLYURETHANE ELASTOMERS HAVING A DENSITY OF FROM ABOUT 6 TO ABOUT 25 PUNDS PER CUBIC FOOT PRODUCED BY THE REACTION OF (A) A POLYOL CON-
TAINING AT LEAST ABOUT 35% OF SECONDARY HYDROXYL ENDGROUPS, (B) AN ORGANIC POLYISOCYANATE, (C) A SURFACTANT, (D) A FOAMING AGENT, AND (E) A CATALYST.
摘要:
A cartridge for storing separately a plurality of ingredients, at least one of them in a separate frangible envelope within the cartridge, and then for mixing the ingredients and expelling the mixture, includes a cylindrical container apertured at each end, a piston, a piston rod slidably passing through one end of the container and through the piston and having a substantially fluid tight seal with the piston and with the side walls of the container, a mixing element affixed to the rod on the side of the piston remote from that one end of the container, and means to couple the piston to the piston rod to permit drive of the piston lengthwise of the container by the piston rod after rupture of the envelope and mixture of the ingredients by the mixing element.
摘要:
In an apparatus for the liquid injection molding of multicomponent thermosetting reaction mixtures having holding tanks for storing each component of the reaction mixture under vacuum, recirculating and metering pumps for recirculating each component to its respective holding vessel between injection cycles and alternately delivering metered amounts of each component to a mixing and injecting unit during the injection cycle and a mold having an internal configuration or cavity conforming to the surfaces of the article to be molded, a movable bottom plate and an injection port and short injection channel terminating in a gate positioned within the mold cavity at a point relatively remote from the geometric center or point of balance of the bottom plate for molding the reaction mixture to the desired configuration, an improvement is disclosed which comprises: A. MEANS FOR CONTINUOUSLY RECIRCULATING ONE PART OF EACH REACTION COMPONENT TO ITS RESPECTIVE HOLDING TANK WHILE SIMULTANEOUSLY DELIVERING THE OTHER PART OF THE REACTION COMPONENT TO A METERING, MIXING, AND INJECTING UNIT FOR INJECTING A PREDETERMINED AMOUNT OF HOMOGENEOUS REACTION MIXTURE INTO THE INJECTION PORT OF A MOLD UNDER SUBSTANTIALLY CONSTANT PRESSURE ONLY FOR THE DURATION OF THE INJECTION CYCLE; B. MEANS FOR PERMITTING DISCHARGE OF THE REACTION MIXTURE FROM THE METERING, MIXING, AND INJECTING UNIT INTO THE INJECTION PORT OF THE MOLD ONLY FOR THE DURATION OF THE INJECTION CYCLE; C. MEANS FOR MAINTAINING SUBSTANTIALLY CONSTANT PRESSURE FOR THAT PART OF THE REACTION COMPONENT BEING RECIRCULATED TO ITS RESPECTIVE HOLDING TANK REGARDLESS OF THE STATE OF OPERATION OF MEANS (B); AND D. AT LEAST ONE INJECTION CHANNEL EXTENDING FROM THE INJECTION PORT OF THE MOLD AND TERMINATING IN AT LEAST ONE GATE POSITIONED WITHIN THE MOLD CAVITY AT A POINT RELATIVELY PROXIMATE TO THE GEOMETRIC CENTER OR POINT OF BALANCE OF THE BOTTOM PLATE, THE INJECTION CHANNEL BEING DEFINED WITHIN THE WALL OF THE MOLD CAVITY AT A LEVEL BELOW THE UPPER SURFACE OF THE BOTTOM PLATE WHEN THE BOTTOM PLATE IS IN THE POSITION FOR THE COMMENCEMENT OF THE INJECTION CYCLE WITH THE BOTTOM PLATE WALL SERVING AS ONE WALL OF THE INJECTION CHANNEL, OR THE INJECTION CHANNEL IS DEFINED WITHIN THE BOTTOM PLATE WALL WITH THE WALL OF THE MOLD CAVITY SERVING AS ONE WALL OF THE INJECTION CHANNEL, OR THE INJECTION CHANNEL IS DEFINED WITHIN THE WALL OF THE MOLD CAVITY AND THE BOTTOM PLATE WALL IN THE AFORESAID MANNER WITH THE FLOW OF REACTION MIXTURE THROUGH THE GATE DURING THE INJECTION CYCLE BEING UNINTERRUPTED WHEN THE BOTTOM PLATE IS IN POSITION FOR THE COMMENCEMENT OF THE INJECTION CYCLE AND INTERRUPTED WHEN THE BOTTOM PLATE IS IN THE POSITION AT THE CONCLUSION OF THE INJECTION CYCLE.
摘要:
SOLID AND MICROCELLULAR POLYURETHANE ELASTOMERS PREPARED BY REACTING (A) LIQUID POLYESTERS CONTAINING FROM ABOUT 25 PERCENT BY WEIGHT TO ABOUT 70 PERCENT BY WEIGHT OF THE EPSILON-OXYCAPROYL UNIT, THE BALANCE OF THE POLYESTER BEING DERIVED FROM THE REACTION OF AT LEAST ONE DICARBOCYLIC ACID WITH AT LEAST TWO GLYCOLS SELECTED FROM THE GROUP CONSISTING OF ETHYULENE GLYCOL, 1,3-PROPANEDIOL, 1,4-BUTANEDIOL AND 1,5-PENTANEDIOL, (B) AN ORGANIC POLYISOCYANATE, AND OPTIONALLY (C) A CHAIN-EXTENDER COMPRISING WATER, GLYCOLS, AMINO ALCOHOLS, OR DIAMINES. IF THE LIQUID POLYESTER (A) IS BRANCHED, FOR EXAMPLE, BY ADDITION OF SMALL QUANTITIES OF A TRIOL, THE REACTION WITH THE ORGANIC POLYISOCYANATE MAY BE CONDUCTED IN THE ABSENCE OF A CHAIN-EXTENDER. PROCESSES FOR PRODUCING THESE ELASTOMERS ARE ALSO DISCLOSED. NOVEL LIQUID, SUBSTANTIALLY PRIMARY HYDROXYL-TERMINATED, LINEAR AND BRANCHED POLYESTERS CONTAINING FROM ABOUT 25 PERCENT BY WEIGHT TO AS MUCH AS ABOUT 70 PERCENT BY WEIGHT OF THE EPSILON-OCYCAPROYL UNIT
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THE BALANCE OF THE POLYESTER BEING DERIVED FROM THE REACTION OF AT LEAST ONE DICARBOXYLIC ACID WITH AT LEAST TWO STRAIGHT CHAIN GLYCOLS SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL, 1,3-PROPANEDIOL, 1,4-BUTANEDIOL AND 1,5-PENTANEDIOL. THESE POLYESTERS HAVE A TRUE MELTING POINT NO HIGHER THAN ABOUT 30*C. ALSO PROVIDED ARE PROCESSES FOR PRODUCING THESE POLYESTERS.