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PMMA waterproof coating for building steel structure node and preparation method of PMMA waterproof coating

A waterproof coating and construction steel technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor bonding of lap joints, expensive waterproof coatings, and inability to solve vertical surfaces. The effects of weak bonding, low cost and high elongation at break

Pending Publication Date: 2021-12-24
福建省三棵树新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the common waterproof materials in China include: modified asphalt waterproof membrane, polymer waterproof membrane, polymer cement waterproof coating, polyurethane waterproof coating, sprayed polyurea waterproof material, etc. Although there are many types of products, each has its own characteristics. Its defects, such as waterproof membranes, are prone to poor bonding and cracking at the overlapping interface; waterproof coatings such as polyurethane and polyurea are expensive and costly; many materials cannot be constructed in low temperature environments, resulting in prolonged construction periods; domestic waterproofing In the process of material application, a common problem is the problem of weak bonding and cracking leading to water leakage. Whether it is water leakage at the overlapping interface of waterproof membranes, or cracking at the joints of steel structures and building inflection points, it will lead to the failure of the waterproofing done; For conventional waterproof coatings, it cannot solve the problems of vertical surface sag and horizontal surface flow.

Method used

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  • PMMA waterproof coating for building steel structure node and preparation method of PMMA waterproof coating
  • PMMA waterproof coating for building steel structure node and preparation method of PMMA waterproof coating

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preparation example Construction

[0028] A kind of preparation method of PMMA waterproof coating for building steel structure node, specifically as follows: the preparation step of A component is as follows: the aliphatic urethane acrylate prepolymer (PUA-6) of hexafunctionality, methyl methacrylate prepolymer Put the polymer (PMMA) and accelerator in a plastic tank, then add anti-settling agent at a speed of 500RPM, then gradually increase the speed to 1500RPM, continue stirring for 30min, add pigments and fillers, and continue stirring for 30min to make component A; Then, the mass ratio of component A and component B is 100:2 for mixing to obtain PMMA waterproof coating for building steel structure nodes.

[0029] PUA-6 is synthesized by two-step reaction using hexamethylene diisocyanate (HDI), 4000 molecular weight polyether and pentaerythritol triacrylate (PETA). Oligomers with set properties can be synthesized through molecular design. Moreover, PUA-6 molecules contain urethane bonds, which can form a va...

Embodiment 1

[0032] 1) Preparation of PUA-6: Add 70 parts of 4000 molecular weight polyether, 15 parts of HDI, and 0.003 parts of organotin catalyst DBTL to a four-necked flask equipped with a stirrer, condensing reflux pipe, and thermometer device, heat up to 65°C, and keep warm for 2 hours After the reaction is complete, add 8 parts of PETA, 0.05 part of MEHQ, and 0.005 part of organic tin catalyst DBTL, keep warm for 2 hours until the reaction is complete, cool down and discharge to obtain PUA-6.

[0033] 2) Preparation of PMMA: Add 70 parts of MMA, 20 parts of BA, 10 parts of EHA, and 0.3 parts of BPO into a four-necked flask equipped with a stirrer, condensing reflux tube, and thermometer. Parts of paraffin, cooled and discharged to obtain PMMA prepolymer.

[0034] 3) Preparation of PMMA node waterproof coating

[0035] This PMMA node waterproof coating contains two components, A and B.

[0036] The preparation process of component A is as follows:

[0037] ① Put 6 parts of PUA-6, 44...

Embodiment 2

[0041] 1) Preparation of PUA-6: Add 80 parts of 4000 molecular weight polyether, 10 parts of HDI, and 0.003 parts of organotin catalyst DBTL to a four-neck flask equipped with a stirrer, condensing reflux tube, and thermometer device, heat up to 65°C, and keep warm 2h, after the reaction is complete, add 5 parts of PETA, 0.05 part of polymerization inhibitor MEHQ, 0.005 part of organotin catalyst DBTL, keep warm for 2 hours until the reaction is complete, cool down and discharge to obtain PUA-6.

[0042] 2) Preparation of PMMA: Add 80 parts of MMA, 15 parts of BA, 15 parts of EHA, and 0.5 parts of BPO into a four-neck flask equipped with a stirrer, condensing reflux tube, and thermometer device, raise the temperature to 75°C, keep it warm for 1.5h, add 1 part of paraffin, cooled and discharged to obtain PMMA prepolymer.

[0043] 3) Preparation of PMMA node waterproof coating

[0044] This PMMA node waterproof coating contains two components, A and B.

[0045] The preparation...

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Abstract

The invention relates to a PMMA waterproof coating for building steel structure nodes, which comprises a component A and a component B. The component A comprises the following raw materials: a six-functionality aliphatic polyurethane acrylate prepolymer (PUA-6), a methyl methacrylate prepolymer (PMMA), an accelerant, an anti-settling agent and a pigment filler; and the component B is dibenzoyl peroxide (BPO). The waterproof coiled material disclosed by the invention solves the problems that the bonding of a lap joint interface of the waterproof coiled material is not firm, and the waterproof coiled material cracks and leaks water; the problems of cracking and water leakage at the inflection joint of a steel structure and a building are solved; low-temperature construction can be achieved, and the curing speed is high; and compared with polyurethane and polyurea waterproof materials, the waterproof material is low in cost.

Description

technical field [0001] The invention relates to the technical field of waterproof coatings, in particular to a PMMA waterproof coating for building steel structure nodes and a preparation method thereof. Background technique [0002] With the continuous development of the real estate industry and the transportation infrastructure industry, the demand for waterproof products is also growing. [0003] At present, the common waterproof materials in China include: modified asphalt waterproof membrane, polymer waterproof membrane, polymer cement waterproof coating, polyurethane waterproof coating, sprayed polyurea waterproof material, etc. Although there are many types of products, each has its own characteristics. Its defects, such as waterproof membranes, are prone to poor bonding and cracking at the overlapping interface; waterproof coatings such as polyurethane and polyurea are expensive and costly; many materials cannot be constructed in low temperature environments, resulti...

Claims

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Application Information

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IPC IPC(8): C09D133/12C09D175/14C09D5/08C09D7/61
CPCC09D133/12C09D5/08C09D7/61C08K2003/2241C08K2003/265C08L75/14C08K3/22C08K3/34C08K3/26
Inventor 强志华孙遵明姜美佳李冰洁徐伟
Owner 福建省三棵树新材料有限公司