Solvent-free polyurethane waterproof coating and preparation method thereof
A technology of solvent-free polyurethane and waterproof coating, applied in the direction of coating, etc., to achieve the effect of excellent bonding performance, low raw material cost, and simple and easy preparation process
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[0020] Example 1
[0021] A solvent-free polyurethane waterproof coating, comprising the following parts by weight of raw materials: 30 parts of polyether polyol, 2 parts of non-ionic emulsifier, 20 parts of diphenylmethane diisocyanate, 4 parts of talc, 10 parts of liquid filler, acetyl 3 parts of tributyl citrate, 2 parts of catalyst, 1 part of pigments and fillers, 2 parts of dispersant, 4 parts of curing agent.
[0022] The polyether polyol is composed of polyether DL-2000D and polyether EP-330N in a ratio of 2:1.
[0023] The polyether polyol has a hydroxy value of 50 for polyether DL-2000D, and a hydroxy value of 30 for the polyether EP-330N.
[0024] The catalyst is one of triethylene diamine, dibutyl tin diacetate, dibutyl tin dilaurate and stannous octoate or a mixture thereof.
[0025] The curing agent is one or more of polyisocyanate, methylene diphenyldiamine and epoxy resin.
[0026] The dispersant is one or more of liquid paraffin, polyethylene wax and polyethylene glycol....
Example Embodiment
[0032] Example 2
[0033] A solvent-free polyurethane waterproof coating, comprising the following parts by weight of raw materials: 40 parts of polyether polyol, 10 parts of nonionic emulsifier, 25 parts of diphenylmethane diisocyanate, 8 parts of talc, 15 parts of liquid filler, acetyl 6 parts of tributyl citrate, 5 parts of catalyst, 3 parts of pigments and fillers, 4 parts of dispersant, 8 parts of curing agent.
[0034] The polyether polyol is composed of polyether DL-2000D and polyether EP-330N in a ratio of 3:1.
[0035] The polyether polyol has a hydroxyl value of 55 for polyether DL-2000D, and a hydroxyl value of 40 for the polyether EP-330N.
[0036] The catalyst is one of triethylene diamine, dibutyl tin diacetate, dibutyl tin dilaurate and stannous octoate or a mixture thereof.
[0037] The curing agent is one or more of polyisocyanate, methylene diphenyl diamine and epoxy resin.
[0038] The dispersant is one or more of liquid paraffin, polyethylene wax and polyethylene gly...
Example Embodiment
[0044] Example 3
[0045] A solvent-free polyurethane waterproof coating, comprising the following parts by weight of raw materials: 50 parts of polyether polyol, 15 parts of non-ionic emulsifier, 30 parts of diphenylmethane diisocyanate, 12 parts of talc, 20 parts of liquid filler, acetyl 9 parts of tributyl citrate, 8 parts of catalyst, 5 parts of pigments and fillers, 7 parts of dispersant, and 10 parts of curing agent.
[0046] The polyether polyol is composed of polyether DL-2000D and polyether EP-330N in a ratio of 3:1.
[0047] The polyether polyol has a hydroxyl value of 60 from the polyether DL-2000D, and the hydroxyl value of the polyether EP-330N is 40.
[0048] The catalyst is one of triethylene diamine, dibutyl tin diacetate, dibutyl tin dilaurate and stannous octoate or a mixture thereof.
[0049] The curing agent is one or more of polyisocyanate, methylene diphenyldiamine and epoxy resin.
[0050] The dispersant is one or more of liquid paraffin, polyethylene wax and poly...
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