Abstract: The present application discloses a polyol system for preparing polyurethane comprising: i) at least one active chain extender having at least two groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary —NH2 group; ii) at least one active chain extender having three groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary —OH group, and iii) at least one polyether polyol starting from an amine. The polyol system according to the present disclosure is phase-stable without layering and capable of releasing mold quickly after reacting with an isocyanate to produce polyurethane.

Abstract: The present invention relates to a quality inspection method for polyurethane samples, an electronic nose device and a storage medium. The quality inspection method for a polyurethane sample comprises the following steps: comparing measured spectrum information of a polyurethane sample to be inspected to reference spectrum information of a plurality of inspected polyurethane samples to determine the reference spectrum information with a predetermined confidence interval to which the measured spectrum information conforms, wherein each of the reference spectrum information is associated with property information of corresponding inspected polyurethane samples; and obtaining a quality inspection result of the polyurethane sample to be inspected on the basis of the property information associated with the determined reference spectrum information.

Abstract: This present disclosure relates to a polyurethane laminated molding article, the polyurethane laminated molding article comprising a core layer and a reinforcing fiber layer disposed on at least one side of the core layer, the reinforcing fiber layer being formed by applying a polyurethane resin composition on one or more layer(s) of reinforcing fiber felt or reinforcing fiber fabric and curing the polyurethane resin. The polyurethane laminated molding article provided by the present disclosure has good demoulding properties and enables a high productivity.

Abstract: The present invention relates to a method for the preparation of a low odor polyether polyol, including: a) providing a basic polyether polyol which comprises one or more aldehyde compounds in an amount of lower than 2 wt. %, based on the amount of said basic polyether polyol as 100 wt. %; b) adding to said basic polyether polyol an aldehyde trapping agent and said aldehyde trapping agent is reacted with said one or more aldehyde compounds to remove said one or more aldehyde compounds, wherein said aldehyde trapping agent is in an amount of 0.1 to 5 wt. %, based on the weight of said basic polyether polyol as 100 wt. %; and c) removing the excess aldehyde trapping agent to obtain said low odor polyether polyol. The present invention also relates to the low odor polyether polyol prepared by said method.

Abstract: The present application discloses a polyol system for preparing polyurethane comprising: i) at least one active chain extender having at least two groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary —NH2 group; ii) at least one active chain extender having three groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary —OH group, and iii) at least one polyether polyol starting from an amine. The polyol system according to the present disclosure is phase-stable without layering and capable of releasing mold quickly after reacting with an isocyanate to produce polyurethane.