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Single-component polyurethane sealant capable of quickly curing moisture and preparation method thereof

A polyurethane sealant, fast curing technology, applied in the field of sealant, can solve problems such as failure to meet the needs of the market, and achieve the effects of eliminating air bubbles, small viscosity changes, and good physical and mechanical properties

Active Publication Date: 2013-09-18
苏州中材非金属矿工业设计研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country's construction sealants are far from meeting the needs of the market in terms of the number of varieties and the quality and effect.

Method used

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  • Single-component polyurethane sealant capable of quickly curing moisture and preparation method thereof
  • Single-component polyurethane sealant capable of quickly curing moisture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 6

[0038] The acetoacetate-terminated polyether prepolymer used in Example 6 was prepared by using polyoxypropylene triol as the polyether polyol component and n-butyl acetoacetate according to the above-mentioned method and conditions.

Embodiment 1

[0040] This embodiment provides a moisture fast curing one-component polyurethane sealant and a preparation method thereof.

[0041] In terms of parts by weight, the raw materials of the one-component polyurethane sealant with rapid moisture curing are: 13 parts of diphenylmethane diisocyanate MI-50 (BASF), polyether polyol (DL-4000, Shandong Lanxingdong Great Chemical Co., Ltd.) 35 parts, acetoacetate-terminated prepolymer 5 parts, propylene carbonate 10 parts, silane coupling agent modified calcined kaolin 35 parts, oxazolidine curing agent (FT-103, Zhangjiagang Fei Special company) 1 part, cyclodextrin-coated organic bismuth complex (Shanghai Hemu Chemical Co., Ltd.) Reagent Co., Ltd.) 0.2 parts.

[0042] The preparation process of the one-component polyurethane sealant with rapid moisture curing is as follows:

[0043] Step 1: In a closed reaction kettle, add polyether polyol, propylene carbonate and silane coupling agent modified calcined kaolin, stir and raise the temp...

Embodiment 2

[0047] This embodiment provides a moisture fast curing one-component polyurethane sealant and a preparation method thereof.

[0048] In terms of parts by weight, the raw materials of the one-component polyurethane sealant with rapid moisture curing are: 13 parts of diphenylmethane diisocyanate MI-50 (BASF), polyether polyol (DL-4000, Shandong Lanxingdong Great Chemical Co., Ltd.) 30 parts, polyether polyol (EP-330N) 10 parts, acetoacetate-terminated prepolymer 3 parts, propylene carbonate 10 parts, silane coupling agent modified talcum powder 30 parts, 2 parts of oxazolidine curing agent (FT-103, Zhangjiagang Feite Company), 1 part of organic bismuth complex coated with cyclodextrin (Shanghai Hemu Chemical Co., Ltd.), 0.5 parts of defoamer (BYK-378) And p-toluenesulfonyl isocyanate (Sinopharm Chemical Reagent Co., Ltd.) 0.5 parts.

[0049] The preparation method of the one-component polyurethane sealant with rapid moisture curing is as follows:

[0050] Step 1: Add polyether...

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Abstract

The invention relates to a single-component polyurethane sealant capable of quickly curing moisture and a preparation method thereof. The polyurethane sealant comprises the following raw materials in percentage by weight: 10 to 20 percent of polyisocyanate monomer, 20 to 45 percent of polyether polyol, 1 to 10 percent of acetoacetic ester sealed end polyether prepolymer, 5 to 20 percent of plasticizer, 25 to 40 percent of modified mineral powder, 1 to 5 percent of latent curing agent, 0.1 to 2 percent of cyclodextrin wrapped environment-friendly catalyst, 0.1 to 1 percent of defoaming agent and 0.1 to 1 percent of water-removing agent, wherein the water-removing agent is one or more of mono-isocyanate compound or functionalized silane compound. The single-component polyurethane sealant avoids bubble fundamentally, can be quickly cured, is stable in storage, and can be applied to construction on damp interfaces.

Description

technical field [0001] The invention relates to a sealant, in particular to a polyurethane sealant used in the construction field, in particular to a one-component polyurethane sealant which is quickly cured by moisture. Background technique [0002] my country's commercially available building sealants can be divided into two categories, namely inorganic and organic. Inorganic sealants are ordinary putty powder and putty paste, which have no elasticity after curing. With the stretching and deformation of building components, the bonding interface damage or cohesive damage will soon occur, and the sealing function will be lost. Organic sealants include silicone glue, polyacrylate glue, polyurethane glue, etc. These products have strong adhesion, elasticity after curing, and good sealing effect. Among them, polyurethane sealant has many advantages, such as: excellent wear resistance, low temperature softness, good adhesion, good elasticity, and can be applied to dynamic join...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J11/04C08G18/76C08G18/75C08G18/71C08G18/48C08G18/16C09K3/10
Inventor 沈春林金伟康康杰分陈鸿根褚建军王玉峰杨炳元杨乃浩
Owner 苏州中材非金属矿工业设计研究院有限公司
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