A polyaspartic acid ester polyurea-based repair material for repairing polyurethane foam on automobile dashboard, its preparation method and repair method
An aspartate, polyurethane foam technology, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problems of low polyurethane foam adhesion, short operating time, hardness mismatch, etc. , to achieve the effect of fast production efficiency, reduced VOC, and good adhesion
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[0084] The present invention also provides a method for preparing the polyaspartic acid ester polyurea-based repairing material for repairing the polyurethane foam of the automobile instrument panel described in the above-mentioned technical solution, comprising:
[0085] a) heating and reacting polyether polyol and polyisocyanate to obtain component A;
[0086] b) mixing polyaspartic acid ester, amino-terminated chain extender, flame retardant, defoamer, wetting and dispersing agent and water-absorbing agent to obtain component B;
[0087] c) The A component and the B component are equally volume-packed into two feed barrels of the special rubber bucket of the two-component glue gun to obtain the polyaspartic acid ester polyurea base for repairing the automobile instrument panel polyurethane foam repair materials;
[0088] The steps a) and b) are not limited in sequence.
[0089] Among them, the types, dosages and sources of polyether polyols, polyisocyanates, polyaspartic ...
Embodiment 1
[0109] Preparation of component A:
[0110] In the trimer containing 68.8 parts of hexamethylene diisocyanate ( N3900, Germany Covestro) in the there-necked bottle, feed nitrogen, heat up to 45 ° C, start to drop 31.2 parts of tetrahydrofuran copolymer diol (PTG-L 4000, Japan Hodogaya Chemical Industry Co., Ltd.), wait After the addition, the temperature was raised to 75°C, and the reaction was continued for 3 to 4 hours, and then the mass percentage (NCO%) of the isocyanate functional group of the reactant was sampled and determined to be 15.5%; Filled with nitrogen for use.
[0111] Preparation of component B:
[0112] 94.2 parts polyaspartate ( NH1420, Covestro, Germany), 1.3 parts of amino-terminated chain extender ( 754, U.S. Huntsman Company), 3 parts of flame retardant (phosphate ester DE-60F, Great Lakes Chemical Company), 0.5 part of defoamer (BYK-024, German BYK Company), 0.5 part of wetting and dispersing agent (CF-10, U.S. Dow Company) and 0.5 parts of water...
Embodiment 2
[0123] Preparation of component A:
[0124] In the trimer containing 76.5 parts of hexamethylene diisocyanate ( N3600, Covestro, Germany) in the three-neck bottle, feed nitrogen, heat up to 45 ° C, start to drop 9.1 parts of PTG-L 4000 and 14.4 parts of PTG-L3000 (tetrahydrofuran copolymer diol, Hodogaya, Japan Chemical Industry Co., Ltd.), gradually warming up to 75°C after the addition, continue to react for 3 to 4 hours, then take a sample to measure the mass percentage (NCO%) of the isocyanate functional group of the reactant to be 17%; to obtain the A component, Place in an airtight container, degas and fill with nitrogen for later use.
[0125] Preparation of component B:
[0126] 76.3 parts polyaspartate ( NH1520, Covestro, Germany), 19.7 parts of amino-terminated chain extenders (from Dorf Ketal, India) 1000), 2 parts of flame retardant (phosphate ester DE-60F, Great Lakes Chemical Company), 0.5 part of defoamer (BYK-024, BYK Company of Germany), 0.5 part of wet...
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