Polyurethane resin for high black color development leather and preparation method thereof
A polyurethane resin and color development technology, which is applied in the fields of polyurethane resin materials for synthetic leather and materials for synthetic leather, can solve the problems of insignificant improvement in color development performance, small molecular weight of dispersant, poor physical properties, etc., so as to improve the black color development. sexual effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0049] The weight percentage composition of the main polyurethane resin and the auxiliary high black color developing resin is as follows:
[0050]Main body polyurethane resin 70%
[0051] Auxiliary high black color developing resin 30%
[0052] The main polyurethane resin is mainly prepared from the following raw materials in parts by weight:
[0053]
[0054] The preparation method of main body polyurethane resin, comprises the steps:
[0055] (1) Add polypolyol and chain extender to the reaction vessel, then add solvent accounting for 70% of the total amount, add catalyst, heat up to 50°C after mixing, stir for 20 minutes, and mix well;
[0056] (2) Add diisocyanate accounting for 95% of the total amount, heat up to 60°C, and react for 2 hours;
[0057] (3) Add the remaining solvent and diisocyanate until the viscosity of the reaction solution reaches 112Pa·s / 25°C, add an end-capping agent, and stir for 30 minutes to obtain the main polyurethane resin.
[0058] The a...
Embodiment 2
[0070] The weight percentage composition of the main polyurethane resin and the auxiliary high black color developing resin is as follows:
[0071] Main body polyurethane resin 90%
[0072] Auxiliary high black color developing resin 10%
[0073] The main polyurethane resin is mainly prepared from the following raw materials in parts by weight:
[0074]
[0075] The preparation method of main body polyurethane resin, comprises the steps:
[0076] (1) Add polypolyol and chain extender to the reaction vessel, then add solvent accounting for 70% of the total amount, add catalyst, heat up to 50°C after mixing, stir for 30min, and mix well;
[0077] (2) Add diisocyanate accounting for 95% of the total amount, heat up to 60°C, and react for 2 hours;
[0078] (3) Add the remaining solvent and diisocyanate until the viscosity of the reaction solution reaches 106 Pa·s / 25°C, add an end-capping agent, and stir for 30 minutes to obtain the main polyurethane resin.
[0079] The auxi...
Embodiment 3
[0090] The weight percentage composition of the main polyurethane resin and the auxiliary high black color developing resin is as follows:
[0091] Main body polyurethane resin 80%
[0092] Auxiliary high black color developing resin 20%
[0093] The main polyurethane resin is mainly prepared from the following raw materials in parts by weight:
[0094]
[0095] The preparation method of main body polyurethane resin, comprises the steps:
[0096] (1) Add polypolyol and chain extender to the reaction vessel, then add solvent accounting for 70% of the total amount, add catalyst, heat up to 50°C after mixing, stir for 20 minutes, and mix well;
[0097] (2) Add diisocyanate accounting for 95% of the total amount, heat up to 70°C, and react for 2 hours;
[0098] (3) Add the remaining solvent and diisocyanate until the viscosity of the reaction solution reaches 109Pa·s / 25°C, add an end-capping agent, and stir for 30 minutes to obtain the main polyurethane resin.
[0099] The ...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More