Segmented poly(urethane-urea)s synthesized directly from isocyanate-terminated prepolymers and masked diamines II. Kinetic and mechanistic study on masking and demasking reaction

Polymer Journal

Volumn 29, Issue 10, 1997, Pages 818-825

  Hanahata, Hiroyuki ^a   Yamazaki, Emiko ^a   Kitahama, Yoshiharu ^a,b  

^a ASAHI CHEMICAL INDUSTRY CO   (Japan)

^b Japan Elastomer Co Ltd   (Japan)

Author keywords

Ethylenediamine; Imidazolidine; Ketimine; Ketones; Masked Diamines; Propylenediamine; Rate Constants; Reaction Mechanism

Indexed keywords

ACETONE; AMINES; CATALYSIS; HYDROLYSIS; MOLECULAR STRUCTURE; REACTION KINETICS; SYNTHESIS (CHEMICAL); WATER;

DEMASKING REACTION; ETHYLENEDIAMINE; IMIDAZOLIDINE; ISOCYANATE TERMINATED PREPOLYMERS; KETIMINE; MASKING REACTION; POLYURETHANE UREA;

POLYURETHANES;

EID: 0031356773     PISSN: 00323896     EISSN: None     Source Type: Journal    
DOI: 10.1295/polymj.29.818     Document Type: Article

References (7)

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6. -1, clearly suggests that the rate limiting step is the dehydration reaction. For the reverse reaction the hydrolysis reaction from a ketimine group must be an another limiting step.
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