Preparing method of active methylene group modified waterborne polyurethane adhesive

[0017] Example one:

[0018] Prepare the raw materials according to the following parts by mass: 30 parts of isophorone diisocyanate; 30 parts of polycaprolactone diol; 15 parts of DMPA; 15 parts of linoleic acid; 25 parts of dimethyl isophthalate-5-sodium sulfonate ; 35 parts of neoglutaric acid; 12 parts of trimethylolpropane; 0.2 parts of catalyst diethylbutyltin dilaurate;

[0019] Mix neoglutaric acid and dimethyl isophthalate-5-sodium sulfonate with stirring, heat to 230°C to react for 5h, cool to 180°C, add DMPA, continue to increase the temperature to 220°C, depressurize and dehydrate for 30min, get Water-soluble polyester polyol;

[0020] Mix linoleic acid and trimethylolpropane, add a catalyst, and react for 5 hours at 200°C under nitrogen flow to obtain active methylene oil;

[0021] The water-soluble polyester polyol and polycaprolactone diol are heated, mixed and stirred, dehydrated at 100°C and 200Pa vacuum for 1h, cooled to 50°C, added isophorone diisocyan

[0022] Embodiment two:

[0023] Prepare raw materials according to the following parts by mass: 40 parts of isophorone diisocyanate; 30 parts of polycaprolactone diol; 12 parts of DMPA; 20 parts of linoleic acid; 30 parts of dimethyl isophthalate-5-sodium sulfonate ; 40 parts of neoglutaric acid; 15 parts of trimethylolpropane; 0.1 part of catalyst diethylbutyltin dilaurate;

[0024] Mix neoglutaric acid and dimethyl isophthalate-5-sodium sulfonate with stirring, heat to 230°C to react for 5h, cool to 180°C, add DMPA, continue to increase the temperature to 220°C, depressurize and dehydrate for 30min, get Water-soluble polyester polyol;

[0025] Mix linoleic acid and trimethylolpropane, add a catalyst, and react for 5 hours at 200°C under nitrogen flow to obtain active methylene oil;

[0026] The water-soluble polyester polyol and polycaprolactone diol are heated, mixed and stirred, dehydrated at 100°C and 200Pa vacuum for 1h, cooled to 50°C, added isophorone diisocyanat

[0027] Embodiment three:

[0028] Prepare raw materials according to the following parts by mass: 50 parts of isophorone diisocyanate; 20 parts of polycaprolactone diol; 10 parts of DMPA; 10 parts of linoleic acid; 20 parts of dimethyl isophthalate-5-sodium sulfonate ; 35 parts of neoglutaric acid; 10 parts of trimethylolpropane; 0.5 parts of catalyst diethylbutyltin dilaurate;

[0029] Mix neoglutaric acid and dimethyl isophthalate-5-sodium sulfonate with stirring, heat to 230°C to react for 5h, cool to 180°C, add DMPA, continue to increase the temperature to 220°C, depressurize and dehydrate for 30min, get Water-soluble polyester polyol;

[0030] Mix linoleic acid and trimethylolpropane, add a catalyst, and react for 5 hours at 200°C under nitrogen flow to obtain active methylene oil;

[0031] The water-soluble polyester polyol and polycaprolactone diol are heated, mixed and stirred, dehydrated at 100°C and 200Pa vacuum for 1h, cooled to 50°C, added isophorone diisocya