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Waterproof foam with buffering performance and hydrophobicity

A waterproof foam, hydrophobic technology, applied in the coating and other directions, can solve the problems of uneven thickness control, poor buffering ability, easy to absorb water, etc., achieve controllable thickness range, improve high temperature resistance and waterproof and hydrophobic, improve The effect of thickness uniformity

Inactive Publication Date: 2020-04-24
广东莱尔新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional waterproof foam is produced by physical or chemical foaming process, the thickness control is uneven, and the deviation is large; the positive PE waterproof foam (polyethylene) has poor temperature resistance, and the PE foam will shrink and deform if it exceeds 80 °C. It will melt if it exceeds 110°C, and because the porous structure of PE foam is formed by chemical foaming or physical foaming, this type of structure has poor cushioning capacity and is easy to absorb water, resulting in poor waterproof effect

Method used

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  • Waterproof foam with buffering performance and hydrophobicity
  • Waterproof foam with buffering performance and hydrophobicity
  • Waterproof foam with buffering performance and hydrophobicity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0058] The method of adding hollow microspheres is:

[0059] (1) Dissolve the elastomer resin A with a dissolving solvent, and control the solution viscosity at 6000-8000mpa.s;

[0060] (2) Add the hollow microspheres to the above-mentioned elastomer resin A liquid, disperse at 500 rpm for 30 minutes, stir evenly, then stir and disperse at 1000 rpm for 30 minutes to obtain a pretreatment solution;

[0061] (3) Add the pretreatment solution into a closed reaction kettle, first pass nitrogen, then gradually heat up to 80 ° C, dropwise add 5% isocyanate dimer of the hollow microsphere mass, and T12 catalyst of 0.1% of the total component mass , constant temperature reaction for 2h; the material of hollow microspheres is acrylic material;

[0062] (4) At a constant temperature of 80°C, gradually add the hydrolyzed hexadecane silane coupling agent as a long-chain alkane type compound until the NCO content in the system drops to 0.1%, to obtain hollow microspheres and elastomer res...

Embodiment B

[0075] mixing elastomer resin A, elastomer resin B, hollow microspheres, silane coupling agent, flame retardant, antioxidant and dissolving solvent;

[0076] The neutral body resin A is selected from the block polymer of styrene-butadiene and the block polymer of styrene-isoprene; the elastomer resin B is acrylic resin to styrene-butadiene and its block Modified polymers; hollow microspheres are treated as in Example B1 and Example B2; the silane coupling agent is selected from vinyl silane coupling agents; the flame retardant is a phosphorus-based halogen-free flame retardant and a nitrogen-based The combination of halogen-free flame retardants; the antioxidant is a combination of hindered phenolic antioxidant and phosphite antioxidant, the two are mixed at a ratio of 1:1; the dissolving solvent is a mixed solvent of cyclohexane and hydrogenated toluene.

[0077] Wherein, embodiment B1: the method of adding hollow microspheres is:

[0078] (1) Dissolve the elastomer resin A ...

Embodiment B2

[0081] Embodiment B2: the method of adding hollow microspheres is:

[0082] (1) Dissolve the elastomer resin A with a dissolving solvent, and control the solution viscosity at 6000-8000mpa.s;

[0083] (2) Add the hollow microspheres to the above-mentioned elastomer resin A liquid, disperse at 500 rpm for 30 minutes, stir evenly, then stir and disperse at 1000 rpm for 30 minutes to obtain a pretreatment solution;

[0084] (3) Add the pretreatment solution into a closed reaction kettle, first pass nitrogen, then gradually heat up to 80 ° C, dropwise add 5% isocyanate dimer of the hollow microsphere mass, and T12 catalyst of 0.1% of the total component mass , constant temperature reaction for 2h; the material of hollow microspheres is acrylic material;

[0085] (4) At a constant temperature of 80°C, gradually add the hydrolyzed hexadecane silane coupling agent as a long-chain alkane type compound until the NCO content in the system drops to 0.1%, to obtain hollow microspheres an...

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Abstract

The invention discloses waterproof foam with buffering property and hydrophobicity. The waterproof foam sequentially comprises a release film and a foaming coating from bottom to top, the foaming coating is prepared from a foaming material; wherein the foaming material comprises elastomer resin A, elastomer resin B, hollow microspheres, a silane coupling agent, a flame retardant, an antioxidant and a dissolving solvent; wherein the elastomer resin A is styrene-butadiene and styrene-isoprene; the elastomer resin B is a modified product of acrylic resin to styrene-butadiene and a modified product of acrylic resin to styrene-isoprene; the hollow microspheres are prepared by acrylic acid or derivatives thereof, and the surfaces of the hollow microspheres are subjected to surface treatment by using a long-chain alkane silane coupling agent. The hollow microspheres are added into the foaming material of the waterproof foam and are mixed with the elastomer resin A and the elastomer resin B, the foaming material has the buffering property of the hollow microspheres, and the thickness uniformity can be additionally improved, so that the thickness range is controllable, and the high temperature resistance and the waterproof hydrophobicity are improved.

Description

technical field [0001] The invention relates to the technical field of waterproof foam, in particular to a cushioning and hydrophobic waterproof foam. Background technique [0002] Waterproof foam is used in fields such as sealing of electronic products, waterproofing of electronic products, cushioning of electronic products or caulking of electronic products. The traditional waterproof foam is produced by physical or chemical foaming process, the thickness control is uneven, and the deviation is large; the positive PE waterproof foam (polyethylene) has poor temperature resistance, and the PE foam will shrink and deform if it exceeds 80 °C. It will melt if it exceeds 110°C, and because the porous structure of PE foam is formed by chemical foaming or physical foaming, this type of structure has poor cushioning capacity and is easy to absorb water, resulting in poor waterproof effect. Contents of the invention [0003] The object of the present invention is to propose a kin...

Claims

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Application Information

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IPC IPC(8): C09D153/02C09D7/65
CPCC08L2201/08C08L2205/02C08L2205/025C08L2205/03C08L2205/035C08L2205/20C09D153/02C09D7/65C09D7/70C08L53/025C08L75/04C08L53/02
Inventor 李政贺才利
Owner 广东莱尔新材料科技股份有限公司