Abstract:
An improved copolyamide is derived from terephthalic acid, at least one straight-chain alkanedioic acid having from 8 to 14 carbon atoms, the terephthalic acid constituting from 50 to about 90 mole percent of the acids, and at least one straight-chain alpha, omega-alkanediamine having from 6 to 14 carbon atoms. This copolyamide is useful as a molding resin and in the production of fibers.
Abstract:
1. A COMPOSITION OF MATTER CAPABLE OF BEING COMPRESSION MOLDED AND CONSISTING ESSENTIALLY OF THE COPOLYAMIDE OF (A) AT LEAST ONE OF 2,2-BIS(4-AMINOCYCLOHEXYL) PROPANE OR METHYL DERIVATIVE THEREOF HAVING THE FORMULA
H2N-(R-CYCLOHEX-1,4-YLENE)-C(-CH3)2-(R-
CYCLOHEX-1,4-YLENE)-NH2
WHEREIN R IS HYDROGEN OR METHYL AND, (B) A MIXTURE OF DICARBOXYLIC ACIDS CONSISTING ESSENTIALLY OF FROM ABOUT 20 TO ABOUT 65 MOLE PERCENT OF ADIPIC ACID AND FROM ABOUT 35 TO ABOUT 80 MOLE PERCENT OF AT LEAST ONE ACID SELECTED FROM THE GROUP CONSISTING OF SUBERIC ACID, AZELAIC ACID, SEBACIC ACID AND DODECANEDIOIC ACID, SAID 2,2-BIS(4-AMINOCYCLOHEXYL)PROPANE AND METHYL DERIVATIVE BEING EMPLOYED IN A RATIO OF ABOUT 1 MOLE PER MOLE OF SAID MIXTURE OF DICARBOXYLIC ACIDS.
Abstract:
Substantially amorphous, optically clear polyamides are produced from a bis(4-aminocyclohexyl)methane or methyl derivative thereof and a bis(carboxyphenyl)methane or methyl derivative thereof. Copolyamides having desirable processing properties are produced by polymerizing the above monomers and at least one straight chain dicarboxylic acid as an additional monomer. The resulting polymers are useful as fibers as well as molding resins.
Abstract:
COPOLYAMIDES PRODUCED FROM A BIS-(4-AMINOCYCLOHEXYL) METHANE OR METHYL DERIVATIVE THEREOF, A PHENYLINDANEDICARBOXYLIC ACID OR ALKYL DERIVATIVE THEREOF, AND AT LEAST ONE STRAIGHT CHAIN DICARBOXYLIC ACID ARE DISSOLVED IN A SOLVENT SYSTEM COMPRISING A MIXTURE OF A LOWER ALCOHOL AND A CHLOROCARBON, PARTICULARLY EFFECTIVE SOLVENT SYSTEMS COMPRISING A MIXTURE OF EITHER METHANOL OR ETHANOL AND MIXTURES THEREOF WITH AT LEAST ONE CHLOROCARBON SELECTED FROM CHLOROFORM, METHYLENE CHLORIDE, CARBON TETRACHLORIDE, TRICHLOROETHYLENE, 1,1,2- TRICHLOROETHANE, 1,1,2,2TETRACHLOROETHANE AND MIXTURES THEREOF. THE COPOLYAMIDE SOLUTIONS ARE USEFUL IN A VARIETY OF APPLICATIONS SUCH AS IN CASTING FILMS IN COATING OBJECTS, IN PREPARING FINELY DIVIDED COPOLYAMIDES FOT FURTHER USE, IN MAKING LAMINATES, IN PREPARING FIBERS, IN SOLVENT WELDING, AND THE LIKE.
Abstract:
Polyamide fibers employing 1,3-bis(4-piperidyl)-propane as a comonomer in combination with bis(p-aminocyclohexyl)methane or methyl derivative thereof and an acyclic C8 to C16 dicarboxylic acid are disclosed, the fibers having improved dyeability with retention of crystallinity.
Abstract:
1. A SUBSTANTIALLY AMORPHOUS, OPTICALLY CLEAR SOLID POLYAMIDE RESIN CONSISTING ESSENTIALLY OF THE POLYMERIC CONDENSATION REACTION PRODUCT OF (A) BIS(4-AMINOCYCLOHEXYL)METHANE OF 40-54 PERCENT TRANS,TRANS CONFIGURATION AND (B) A MIXTURE OF 50-70 MOLE PERCENT DODECANEDIOIC ACID AND 50-30 MOLE PERCENT SUBERIC ACID OR A MIXTURE OF 50-70 MOLE PERCENT DODECANEDIOCI ACID AND 50-30 MOLE PERCENT AZELAIC ACID.
Abstract:
A salt of dicarboxylic acid and diamine, at least 50 mole percent of the dicarboxylic acid being terephthalic acid, is condensed to form a polyterephthalamide by heating the salt to a temperature in the range of about 200*C. to about 230*C. and maintaining the salt at that temperature for about 1/2 hour to about 6 hours before increasing the temperature of the salt to at least 250*C. In one specific embodiment the salt contains from about 2 to about 8 mole percent excess acid.
Abstract:
SUBSTANTIALLY AMORPHOUS OPTICALLY CLEAR POLYAMIDES ARE PRODUCED FROM A BIS(4-AMINOCYCLOHEXYL)METHANE OR METHYL DERIVATIVE THEREOF AND A PHENYLINDANEDICARBOXYLIC ACID OR ALKYL DERIVATIVE THEREOF. COPOLYAMIDES HAVING DESIRABLE PROCESSING PROPERTIES ARE PRODUCED BY POLYMERIZING THE ABOVE MONOMERS AND AT LEAST ONE STRAIGHT CHAIN DICARBOXYLIC ACID AS AN ADDITIONAL MONOMER. THE RESULTING POLYMERS ARE USEFUL AS FIBERS AS WELL AS MOLDING RESINS.
Abstract:
Adhesives useful for uniting the surfaces of various elements are provided comprising a substantially amorphous polyamide or poly(amide-imide) prepared by polymerization of at least one of bis(4-aminocyclohexyl)methane (PACM) or 2,2-bis(4aminocyclohexyl)propane (PACP) or methyl derivatives thereof with at least one polycarboxylic acid or a crystalline polymer of bis(4-aminocyclohexyl)methane (PACM) and azelaic acid. The polymeric compositions can be applied to surfaces as a hot melt adhesive or solvent cement.
Abstract:
Polyamide fibers employing 4,4''-methylenedianiline or a methyl derivative thereof as a comonomer in combination with bis(paminocyclohexyl)methane or methyl derivative thereof and an acyclic C8 to C16 dicarboxylic acid have improved dyeability with retention of crystallinity.