CN101987950A

CN101987950A - Single-component polyurethane termite-resistant building sealant

Info

Publication number: CN101987950A
Application number: CN2009100416887A
Authority: CN
Inventors: 任绍志
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-05
Filing date: 2009-08-05
Publication date: 2011-03-23

Abstract

The invention relates to a single-component polyurethane termite-resistant building sealant and a preparation method thereof, in particular to a building sealant having termite-resistant function and aims to solve the problems that other complex auxiliary materials are required for resisting termites on buildings and a separately-used termite-resistant agent are easy to take accidentally by people and realize termite-resistant function of the single-component polyurethane termite-resistant sealant. In the technical scheme, the sealant comprises the following components in percentage by weight: 20 to 70 percent of polyurethane prepolymer, 30 to 50 percent of filler, 0.2 to 8 percent of water remover, 0.2 to 1 percent of silane coupling agent, 2 to 5 percent of termite-resistant master batch, 0.1 to 0.5 percent of synthesis catalyst, 0.5 to 1 percent of curing catalyst and 1 to 3 percent of thixotropic agent, wherein the termite-resistant master batch comprises the following components in part by weight: 30 parts of plasticizer, 40 parts of termite-resistant agent, 30 parts of calcium carbonate and 2 parts of dispersing agent.

Description

A kind of mono-component polyurethane is prevented the ant building sealant

Technical field

The present invention relates to the one-component polyurethane sealant technical field, is a kind of polyurethane building seal gum that contains anti-termite agent specifically.

Background technology

Timber in use is subject to the harm of bacterium worm, particularly the termite of the torrid zone and subtropical zone, often makes the buildings of using timber suffer devastating loss.Termite is global important pests, and the title of anodontia tiger is arranged.The dangerous object of termite is very extensive, relates to the every field of national economy, mainly comprises aspects such as building construction, hydro project, railway traffic.Annual about 20～2,500,000,000 yuan of the direct economic loss that China's termite damage building construction causes.In case occur termite in the buildings, eliminate termite fully is a very complicated job, therefore, need focus on prevention.

Polyurethane sealant is the novel glue kind that occurs after acrylate seal gum, silicone glass glue.This class seal gum is a crosslinking accelerator with micro-moisture in the air, can at room temperature solidify and be elastic stage.By regulating the kind and the consumption of polyethers kind, isocyanic ester, can significantly regulate advantages such as the mechanical property of seal gum, low temperature resistant, flexibility and bonding strength are big, be a kind of adhesion type seal gum.This glue has good cementability to metal, timber etc., but does not have anti-ant function.

Summary of the invention

The present invention overcomes the shortcoming of prior art, and a kind of mono-component polyurethane building sealant with anti-ant function is provided.

Seal gum raw material of the present invention and quality percentage composition thereof:

Performed polymer 20～70%

Anti-ant masterbatch 3%

Filler 30～50%

Titanium dioxide 0.5～2%

Silane coupling agent 0.1%

Catalyzer 0.5～1%

Thixotropic agent 1～3%

Each component respectively be 100%

Seal gum preparation technology flow process of the present invention:

1, performed polymer is added in the mixing tank, stirred 10 minutes under vacuum 0.09 ± 0.005Mpa condition, temperature is controlled at 25～40 ℃;

2, add the anti-termite agent masterbatch again, after mixing with performed polymer, stirred 20 minutes;

3, add dried solid filler, after mixing, under 50～70 ℃ of nitrogen atmosphere conditions, stirred 30～50 minutes;

4, under the nitrogen protection condition, add silane coupling agent and catalyzer, under 50～70 ℃, continued to mix 1～1.5 hour;

5, material goes out still, through check, divides packing.

Performed polymer raw material of the present invention:

Polyoxypropyleneglycol 30～60%

Polyoxytrimethylene triol 10～30%

Polyisocyanates 5～10%

Softening agent 20～50%

Each component sum is 100%

Anti-ant masterbatch raw material of the present invention and matrix amount percentage composition:

Softening agent 30%

Insect-proof agent 40%

Lime carbonate 30%

Each component sum is 100%

Manufacturing process flow

According to this paper weight with the pure and mild polyisocyanates of propylene oxide three add be equipped with agitator, nitrogen inlet and thermometer instead with regard in the still; mixture is thorough mixing under nitrogen protection; and temperature of reaction kettle is controlled at 80～90 ℃, and react after 2 hours, in still, add the propylene oxide glycol; behind the reaction 1.5h; add polyisocyanates, in still, add softening agent behind the reaction 2h, mix; the performed polymer isocyanate content that obtains is that 0.5～5%, 25 ℃ of viscosity are 3000～8000 centipoises.

Polyethers propylene glycol molecular weight of the present invention is 2000～8000, and the molecular weight of polyethers glycerol is 1000～5000, and the molecular weight of polyethers propylene glycol is greater than polyethers glycerol molecular weight.

Softening agent of the present invention is the long phthalic ester of carbochain, as: dioctyl phthalate (DOP), Dinonylphthalate, didecyl phthalate at interior one or more.

Anti-termite agent of the present invention comprises one or more of bifenthrin, Cypermethrin, permethrin, Provado, fluorine worm nitrile, silicic acid, Propoxur, fluorine bell urea, flufenoxuron, sulfluramid and the spirit of volt ant for not containing the anti-termite agent of active H.

Silane coupling agent of the present invention is not for containing the silane of active H, comprise that β-(3,4 epoxycyclohexyl)-ethyl trimethoxy silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, γ-glycidoxypropyltrietandysilane andysilane, γ-urea groups propyl-triethoxysilicane, γ-urea groups propyl trimethoxy silicane, γ-methacryloxypropyl trimethoxy silane, γ-methacrylamido isopropoxy silane are at interior one or more.

Advantage of the present invention is: seal gum of the present invention is given the function of the anti-ant of seal gum, is applied to the household floor covering layers, and the bonding and sealing of connection seam just can effectively prevent spreading and propagation of termite, therefore has the better protection buildings to be difficult for being destroyed by termite.

Embodiment

Example 1

Select for use following raw materials according to make performed polymer:

Polyoxypropyleneglycol (6000) 35%

Polyoxytrimethylene triol (2000) 10%

4,4 '-dicyclohexyl methane diisocyanate 6.83%

Didecyl phthalate 47.5%

Molecular sieve 0.67%

The isocyanate content of preparation is to be 4000mpa.s. for viscosity under 0.56%, 25 ℃

The preparation of anti-ant masterbatch:

Didecyl phthalate 30%

Bifenthrin 50%

Lime carbonate 20%

Seal gum is produced:

Performed polymer 55%

Anti-ant masterbatch 3%

Lime carbonate 38%

Aerosil 2%

Titanium dioxide 1.87%

γ-glycidyl ether oxygen propyl trimethoxy silicane 0.1%

2,2-dual-morpholinyl diethyl ether 0.03%

Produce seal gum according to the above-mentioned seal gum technological process of production.Use sealing glue to carry out tensile strength, elongation at break, hardness, detected result is as follows: tensile strength is 1.8Mpa, elongation at break is 700%, 100% modulus 0.5Mpa, hardness 30A.

Example 2

Select for use following raw materials according to make performed polymer:

Polyoxypropylene glycol (4000) 30%

Polyoxygenated glycerol (3000) 25%

Hexamethylene diisocyanate trimer 8.88%

Diisononyl phthalate 35.6%

To Methyl benzenesulfonyl isocyanate 0.52%

The aggressiveness content of preparation is to be 4000mpa.s. for viscosity under 2.0%, 25 ℃

The preparation of anti-ant masterbatch

Didecyl phthalate 30%

Provado 50%

Lime carbonate 20%

Seal gum is produced:

Performed polymer 55%

Anti-ant masterbatch 3%

Lime carbonate 40%

Carbon black 1.8%

Dibutyl tin laurate 0.1%

Produce seal gum according to the above-mentioned seal gum technological process of production.Use sealing glue to carry out tensile strength, elongation at break, hardness, detected result is as follows: tensile strength is 3.2Mpa, and elongation at break is that 500%, 100% modulus is 0.8Mpa, and hardness is 35A.

Claims

1. the anti-ant building sealant of mono-component polyurethane comprises base polyurethane prepolymer for use as, softening agent, filler, anti-ant masterbatch, synthetic catalyst, curing catalysts, thixotropic agent, it is characterized in that: also comprise anti-ant masterbatch in the prescription.The weight proportion of anti-ant building sealant component is: performed polymer 20～70%, filler 30～50%, water-removal agent 0.2～8%, silane coupling agent 0.5～2%, anti-ant masterbatch 2～5%, curing catalysts 0.5～1%, water-removal agent 0.5～1.5%, thixotropic agent 1～3%.

Raw material that described performed polymer is used and weight percentage thereof: polyoxypropyleneglycol 30～60%, polyoxytrimethylene triol 10～30%, polyisocyanates 5%～10%, softening agent or solvent 20～50%, each component sum is 100%.

2. mono-component polyurethane according to claim 1 is prevented the ant building sealant, it is characterized in that: anti-ant masterbatch comprises didecyl phthalate, anti-termite agent, lime carbonate, dispersion agent.In 100 parts, the weight proportion of its component is: 30 parts of didecyl phthalates, 40 parts of anti-termite agents, 30 parts in lime carbonate, 2 parts of dispersion agents;

3. according to the described seal gum of claim 2.1, it is characterized in that: described polyethers propylene glycol molecular weight is 2000～8000, and the molecular weight of polyethers glycerol is 1000～5000, and the molecular weight of polyethers propylene glycol is greater than polyethers glycerol molecular weight;

4. single component sealant according to claim 1 is characterized in that: described softening agent is the long phthalic ester of carbochain, as: dioctyl phthalate (DOP), Dinonylphthalate, didecyl phthalate;

5. according to the described seal gum of claim 1, it is characterized in that, described anti-termite agent comprises one or more of bifenthrin, Cypermethrin, permethrin, Provado, fluorine worm nitrile, silicic acid, Propoxur, fluorine bell urea, flufenoxuron, sulfluramid and the spirit of volt ant for not containing the anti-termite agent of active H;

6. according to the described seal gum of claim 1, it is characterized in that: described silane coupling agent is not for containing the silane of active H, comprise that β-(3,4 epoxycyclohexyl)-ethyl trimethoxy silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, γ-glycidoxypropyltrietandysilane andysilane, γ-urea groups propyl-triethoxysilicane, γ-urea groups propyl trimethoxy silicane, γ-methacryloxypropyl trimethoxy silane, γ-methacrylamido isopropoxy silane are at interior one or more;

7. according to the described seal gum of claim 1, it is characterized in that preparation process is as follows:

(1) preparation performed polymer: with the pure and mild polyisocyanates of propylene oxide three add be equipped with agitator, nitrogen inlet and thermometer instead with regard in the still, mixture is thorough mixing under nitrogen protection, and temperature of reaction kettle is controlled at 80～90 ℃, and react after 2 hours, in still, add the propylene oxide glycol, behind the reaction 1.5h, add polyisocyanates, in still, add softening agent behind the reaction 2h, mix, the performed polymer isocyanate content that obtains is that 1.5～5%, 25 ℃ of viscosity are 3000～8000 centipoises;

(2) the anti-ant masterbatch of preparation: add in the mixing tank at the softening agent that vacuum 0.09 ± 0.005Mpa will dewater, add insect-proof agent then, stir 30min, add dispersion agent, continue to stir 10min, add filler at last and stir 60min.

(3) preparation seal gum

I adds performed polymer in the mixing tank, stirs 10 minutes under vacuum 0.09 ± 0.005Mpa condition, and temperature is controlled at 25～40 ℃;

II adds the anti-termite agent masterbatch again, after mixing with performed polymer, stirs 20 minutes;

III adds dried solid filler, after mixing, stirs 30～50 minutes under 50～70 ℃ of nitrogen atmosphere conditions;

IV adds silane coupling agent and catalyzer under the nitrogen protection condition, continued to mix 1～1.5 hour under 50～70 ℃;

The V material goes out still, through check, divides packing.