Branched alkyl-containing aminobenzamides as chain extenders in

Details Branched alkyl-containing aminobenzamides as chain extenders in Branched alkyl-containing aminobenzamides as chain extenders in

1994-04-13

1994-12-06

O'Sullivan, Peter

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

528 64, C07C23734, C08G 810, C08G 832

Patent

active

053712889

ABSTRACT:
N,N'-Di-(branched alkyl)-alkylenediamine-bis-p-aminobenzamides are useful as chain extenders in the manufacture of polyurethane-urea elastomers. These compositions have remarkably uniform reactivities but can be varied structurally to achieve a range of processibility characteristics by altering the melting points of the chain extenders. The preferred compounds melt in a range of 50.degree. to 175.degree. C. while exhibiting t.sub.5000 reactivities of about four minutes. The combination of processing characteristics, reactivities and physical properties of the elastomer products offers advantages not available in commonly used diamine chain extenders of the prior art.

REFERENCES:
patent: 3188302 (1965-06-01), Lorenz
patent: 3428610 (1969-02-01), Klebert
patent: 3736350 (1973-05-01), Meckel
patent: 3761509 (1973-09-01), Lesher
patent: 3846351 (1974-11-01), Huffaker et al.
patent: 3932360 (1976-01-01), Ceranrowski
patent: 4218543 (1980-08-01), Weber et al.
patent: 4222955 (1980-09-01), Chung et al.
Baron, et al, "On the Use of Trimethylene Glycol Di-p-aminobenzoate as a Curing Agent for Polyurethane Elastomers", Appl. Polym. Sci., vol. 20 pp. 285-286 1976.

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