Preface Two-component polyurethane adhesives are usually composed of an isocyanate component (curing agent) containing NCO and a hydroxyl component (m…
Abstract: The effects of non-butyltin catalysts and monobutyltin catalysts and their dosages on the catalytic esterification reaction activity of poly…
1. Basic reaction The formation of polyurethane soft foam includes 2 basic reactions: foaming reaction and polymerization reaction (also called gel re…
1、Polyether As the main raw material, polyether reacts with isocyanate to produce carbamate, which is the skeleton reaction of foam products. In the c…
The hair of contemporary youth is very valuable The post-90s who are punking out for health The obsession with hair care and anti-hair loss is unprece…
【Background】. Tritium (3H) labeling is an important tool for the study of pharmacokinetic and pharmacodynamic properties of drugs, radioautography, re…
Influence of catalyst Since the raw material systems of polyester polyol and polyether polyol are different, there are differences in reaction perform…
1、High closed pore rate (1) polyether polyol: high proportion of ethylene oxide, high activity, more occurring in the replacement of polyether polyol …
1. What is sprayed rigid polyurethane? Sprayed rigid polyurethane is a new type of waterproof and thermal insulation material made of polymer by mixin…
There are many types of catalysts for polyurethane, with different catalytic activities and effects. In the production of polyurethane products, it is…
Kinetics of the reaction of hydroxyl compounds with isocyanates – d(-NCO)/dt = K0 × (-NCO) × (-OH) K1 is the forward reaction rate for the compl…
Rigid foam leveling agent (hereinafter referred to as “silicone oil”) model selection and dosage definition is of great importance, it is …
