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(WO2017087156) HIGH PERFORMANCE POLYURETHANE PREPOLYMER AND CURING COMPOSITIONS

Pub. No.: WO/2017/087156 International Application No.: PCT/US2016/059831
Publication Date: 26.05.2017 International Filing Date: 01.11.2016
IPC:
C08G 18/48 (2006.01), C08G 18/42 (2006.01), C08G 18/76 (2006.01), C08K 5/00 (2006.01), C08K 5/12 (2006.01)
Applicants: CHEMTURA CORPORATION [US/US]; 199 Benson Road Middlebury, CT 06749 (US)
Inventors: DOYLE, Thomas, R.; (US)
Agent: SUHADOLNIK, Joseph, C.; (US)
Priority Data:
62/256,251 17.11.2015 US
Title (EN) HIGH PERFORMANCE POLYURETHANE PREPOLYMER AND CURING COMPOSITIONS
(FR) PRÉPOLYMÈRE DE POLYURÉTHANE DE HAUTE PERFORMANCE ET COMPOSITIONS DE DURCISSEMENT
Abstract:
(EN)Compositions comprising isocyanate capped polyurethane prepolymers and select mono-benzyl phthalate plasticizers, e.g., 7-(2,6,6,8-tetramethyl-4-oxa-3-oxo-nonyl) benzylphthalate, exhibit better isocyanate stability than prepolymer compositions comprising other plasticizers common in polyurethane systems. Curing compositions comprising these prepolymers, the select mono-benzyl phthalate plasticizers, and methylenedianiline coordination complex curing agents exhibit improved processing characteristics and yield elastomeric polyurethanes with lower compression set, higher break strength and lower color than similar composition comprising plasticizers such as benzoate plasticizers

HIGH PERFORMANCE POLYURETHANE PREPOLYMER AND CURING COMPOSITIONS

Compositions comprising an isocyanate capped prepolymer and a select mono-benzyl phthalate plasticizer such as benzyl texanol phthalate exhibit much improved isocyanate stability, produce curing compositions with increased storage stability or pot life when combined with methylenedianiline metal salt coordination complexes, and which upon cure provide elastomers with improved physical properties over compositions comprising the same prepolymer with other common plasticizers, such as benzoate plasticizers.

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