Two-component polyurethane sealant for insulating glass and preparation method thereof
A two-component polyurethane and sealant technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as poor airtightness and inability to meet the long-term airtightness requirements of insulating glass door and window systems
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[0072] The present invention provides a method for preparing a two-component polyurethane sealant for insulating glass described in the above technical solution, comprising the following steps:
[0073] Mix hydroxyl-terminated liquid polybutadiene, plasticizer, filler and thixotropic agent, dehydrate under vacuum at 110-130°C, and then add chain extender, catalyst a, water-absorbing agent, ultraviolet light stabilizer, antioxidant Mix to obtain component A;
[0074] Mix plasticizer, filler and thixotropic agent, vacuum dehydrate at 110-130°C, and then mix with isocyanate, isocyanate polymer, silane coupling agent and catalyst b to obtain component B.
[0075] In the present invention, hydroxyl-terminated liquid polybutadiene, plasticizer, filler and thixotropic agent are mixed, and after vacuum dehydration at 110-130°C, chain extender, catalyst a, water-absorbing agent, ultraviolet light stabilizer, anti- Oxygen is mixed to obtain A component. In the present invention, the t...
Embodiment 1～3
[0080] Prepare according to raw material type and consumption shown in Table 1 and Table 2:
[0081] Table 1 Example 1~3 in the raw material type that prepares A component to adopt and consumption list
[0082]
[0083] List of raw materials and consumption used by B component in Table 2 embodiment 1~3
[0084]
[0085] will model Hydroxyl-terminated liquid polybutadiene of Poly HT, diisodecyl phthalate plasticizer of model DIDP, heavy calcium carbonate and nano-calcium carbonate thixotropic agent are mixed, heated to 120°C under stirring, and vacuum dehydrated After 2 hours, cool down to 50°C, then add chain extender 1,4-butanediol, triethylamine and molecular sieve water-absorbing agent, and continue vacuum stirring for 1 hour to obtain component A;
[0086] will model The hydroxyl-terminated liquid polybutadiene of Poly HT reacts with 4,4'-diphenylmethane diisocyanate to obtain an isocyanate polymer, wherein the mass content of -NCO is 3.5%;
[0087] Heat the di...
Embodiment 4～6
[0093] Table 4 Example 4~6 in the raw material type that prepares A component to adopt and consumption list
[0094]
[0095] List of raw materials and consumption used by B component in Table 5 embodiment 4~6
[0096]
[0097] will model Hydroxyl-terminated liquid polybutadiene of Poly HT, diisodecyl phthalate plasticizer of model DIDP, clay, and organic bentonite thixotropic agent are mixed and heated to 120°C under stirring, and then cooled to 50°C, add diethylaminoethanol chain extender, stannous octoate catalyst a, molecular sieve water absorbent, 2-hydroxy-4-n-octyloxybenzophenone UV stabilizer and dialkyl diphenylamine antioxidant, Continue vacuum stirring for 1h to obtain component A;
[0098] will model The hydroxyl-terminated liquid polybutadiene of Poly HT reacts with 2,4'-diphenylmethane diisocyanate to obtain an isocyanate polymer, wherein the mass content of -NCO is 3.2%;
[0099] Heat tricresyl phosphate plasticizer, clay filler and carbon black thix...
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