Special environment-friendly combined polyether for sprayed pipeline and preparation method of special environment-friendly combined polyether
A combination of polyether and environment-friendly technology, applied in the direction of coating, etc., can solve the problems of uneven surface, heartburn, spray foam cracking, etc., and achieve the effect of simple preparation method, stable product quality and improved bond strength
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Embodiment 1
[0040] Raw materials: polyether polyol A (4.5 functionality, number average molecular weight 500-600) 45 kg;
[0041] Polyether polyol B (4 functionality, number average molecular weight 500-700) 15 kg;
[0042] Polyether polyol C (3 functionality, number average molecular weight 900-1000) 7 kg;
[0043] Polyester polyol (two functionalities, viscosity 2000-4000mpa.s / 25℃, acid value ≤1.0mgKOH / g) 5 kg;
[0044] 3 kg of TEA;
[0045] Foam stabilizer L-69201.5 kg;
[0046] Catalyst DabcoPT3031.5 kg, A-332.7 kg, PT3042 kg, DabcoT-120.3 kg;
[0047] Blowing agent: HFC-245fa 17 kg.
[0048] The preparation steps are as follows:
[0049] A component material:
[0050] Put the weighed raw materials into the reaction kettle and stir for 1 hour, take them out for inspection, and meet the set foaming parameters, that is, the qualified product of component A is obtained, take it out of the reaction kettle and put it into a barrel;
[0051] B component material:
[0052] Polymethyl...
Embodiment 2
[0057] Raw materials: polyether polyol A (4.5 functionality, number average molecular weight 500-600) 40 kg;
[0058] Polyether polyol B (4 functionality, number average molecular weight 500-700) 15 kg;
[0059] Polyether polyol C (3 functionality, number average molecular weight 900-1000) 9 kg;
[0060] Polyester polyol (two functionalities, viscosity 2000-4000mpa.s / 25℃, acid value ≤1.0mgKOH / g) 7 kg;
[0061] 3 kg of cross-linking agent TEA;
[0062] Foam stabilizer L-69201.5 kg;
[0063] Catalyst DabcoPT3031.4 kg, A-332.9 kg, PT3041.8 kg, DabcoT-120.4 kg;
[0064] Foaming agent: HFC-245fa 18 kg.
[0065] The preparation steps are as follows:
[0066] A component material:
[0067] Put the weighed raw materials into the reaction kettle and stir for 1 hour, take them out for inspection, and meet the set foaming parameters, that is, the qualified product of component A is obtained, take it out of the reaction kettle and put it into a barrel;
[0068] B component material: ...
Embodiment 3
[0074] Raw materials: polyether polyol A (4.5 functionality, number average molecular weight 500-600) 40 kg;
[0075] Polyether polyol B (4 functionality, number average molecular weight 500-700) 18 kg;
[0076] Polyether polyol C (3 functionality, number average molecular weight 900-1000) 7 kg;
[0077] Polyester polyol (two functionalities, viscosity 2000-4000mpa.s / 25℃, acid value ≤1.0mgKOH / g) 5 kg;
[0078] 5 kg of cross-linking agent TEA;
[0079] Foam stabilizer L-69201.8 kg;
[0080] Catalyst DabcoPT3031.5 kg, A-333.0 kg, PT3041.4 kg, catalyst DabcoT-120.3 kg;
[0081] Blowing agent: HFC-245fa 17 kg.
[0082] The preparation steps are as follows:
[0083] A component material:
[0084] Put the weighed raw materials into the reaction kettle and stir for 1 hour, take them out for inspection, and meet the set foaming parameters, that is, the qualified product of component A is obtained, take it out of the reaction kettle and put it into a barrel;
[0085] B component...
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