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Polyurea interlayer bonding agent and preparation method thereof
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A kind of bonding agent and bonding agent technology, which is applied in the direction of polyurea/polyurethane adhesive, adhesive type, polyurea/polyurethane coating, etc. Solve problems such as spraying polyurea bonding strength to achieve excellent bonding performance
Active Publication Date: 2014-01-29
北京市大禹王防水工程集团有限公司
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Problems solved by technology
The traditional bonding agent cannot solve the bonding strength between the bottom polyurea and the newly sprayed polyurea well, and as time goes by, the performance cannot meet the requirements of relevant indicators
Method used
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Embodiment 1
[0062] The polyurea interlayer binder adopts A and B two-component reaction solvent-based system.
[0063] The composition of A and B component prescriptions are as follows:
[0064]
[0065] Production Process:
[0066] Preparation of component A (prepolymer preparation): Add PTMG-1000 to the reactor, start stirring, preheat to 50°C, add MDI, keep at 80°C for 3h, and then test for isocyanateion-NCO (O=C-N) Content, after passing the packaging.
[0067] Preparation of component B: Add Wanalink6200, ethyl acetate, acetone and additives into the reactor, mix evenly, and pack.
[0068] Construction process:
[0069] Construction preparation→Grinding treatment of polyurea base layer→Mix the two components according to A:B=1:3 (weight ratio)→Brush the product→Spray the second layer of polyurea waterproof coating after the surface is dry.
Embodiment 2
[0071] The polyurea interlayer binder adopts A and B two-component reaction solvent-based system.
[0072]The composition of A and B component prescriptions are as follows:
[0073]
[0074] Production technology: with embodiment 1.
[0075] Construction process:
[0076] Construction preparation→Grinding treatment of polyurea base layer→Mix the two components according to A:B=1:3 (weight ratio)→Brush the product→Spray the second layer of polyurea waterproof coating after the surface is dry.
Embodiment 3
[0078] The polyurea interlayer binder adopts A and B two-component reaction solvent-based system.
[0079] The composition of A and B component prescriptions are as follows:
[0080]
[0081]
[0082] Production technology: with embodiment 1.
[0083] Construction process:
[0084] Construction preparation→Grinding treatment of polyurea base layer→Mix the two components according to A:B=1:3 (weight ratio)→Brush the product→Spray the second layer of polyurea waterproof coating after the surface is dry.
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Abstract
The invention discloses a polyurea interlayer bonding agent and a preparation method thereof. The polyurea interlayer bonding agent is made of a component A and a component B according to a weight ratio of 1:1-1:5, the component A is semi-prepolymer mainly made by reaction of isocyanate and hydroxyl compound, and the component B is mainly made of chain extender and solvent. The polyurea interlayer bonding agent and the preparation method thereof have the advantages that inter-polyurea bonding performance can sufficiently meet indexes in correlative national standards, and traditional adhesives belong to physical bonding while the polyurea interlayer bonding agent not only realizes physical bonding but also partially forms chemical crosslinking with newly-coated polyurea, so that 'skin' type bonding is truly realized.
Description
technical field [0001] The invention relates to a bonding agent for waterproof materials, in particular to a bonding agent used between polyurea waterproof layers and a preparation method. Background technique [0002] From 1998 when China's first polyurea formula was successfully sprayed in the Ocean Chemical Research Institute to 2007 when polyurea was applied in national key projects such as Olympic venues and Beijing-Tianjin high-speed rail, China's polyurea industry has experienced a difficult and tortuous but rapid development. process. In 2009, as the design of the Beijing-Shanghai high-speed railway waterproofing project selected spraying polyurea elastomer as the waterproof coating, polyurea became the hottest topic in the waterproofing industry, and the development of polyurea technology in China also achieved an unprecedented climax. [0003] Spray polyurea elastomer is a new type of waterproof material, which has superior performance that cannot be compared with...
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Application Information
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