CN1060497C - Non-asphalt emulsion type waterproof coating and preparation method thereof - Google Patents

Abstract

The invention belongs to the preparation of chemical building materials. At present, asphalt must be used as a solubilizer in the preparation of emulsion-type styrene-butadiene-styrene waterproof coatings, and asphalt absorbs light and heat, is cold, brittle and hot, not resistant to aging, and has a foul smell and pollutes the environment. The invention provides a non-asphalt emulsion type styrene-butadiene-styrene waterproof coating, in which rosin and turpentine derivatives are used to replace asphalt, and appropriate modifiers, plasticizers and emulsifiers are added. First make a water-in-oil emulsion, and then add a lot of hot water to reverse it into an oil-in-water emulsion type waterproof coating.

Description

A kind of non-bitumen emulsion type waterproof coating and its preparation method

The invention belongs to building materials, especially for waterproofing, plugging and sealing between various building components of buildings.

There are four types of waterproof coatings for construction according to their dosage forms: solvent type, emulsion type, two-liquid reaction type and hot melt type. Among them, the emulsion type uses water as a solvent, which has the advantages of non-combustibility, anti-toxicity, pollution-free and low price. , so this kind of waterproof coating is very popular, but the emulsion coatings on the market, such as styrene-butadiene, neoprene, acrylic acid, etc., are all made of ready-made latex and some modified emulsions and fillers. The solid content is 40-50%. These coatings have good viscoelasticity and waterproof performance, and the price is also cheap. However, due to insufficient plasticity, they can only be made into thin coatings, which will affect the mechanical properties and durability. Styrene-butadiene-styrene rubber, that is, SBS rubber, has excellent elasticity, plasticity and cold resistance, and has a low viscosity in solution, so it can be formulated with high-solid content thick coatings, but SBS must be made into industrial emulsion type Coatings are still very difficult. "China Building Waterproof Materials" 1994, No. 1, P-17 and 1995, No. 1, P-19 reported: Suzhou, China dissolves SBS in asphalt at 190-200 ° C to become a uniform and less viscous system, and then emulsified with mineral emulsifier. The paint uses asphalt as a solubilizer, and because the asphalt is easy to age, it also makes the SBS rubber emulsify smoothly. Asphalt itself has water resistance, elastic-plastic, adhesive properties and is cheap. It is widely used at present, but as we all know, asphalt is black, absorbs light and heat, and can increase the roof temperature by 30°C compared with light-colored roofs. It is cold, brittle, hot, and not resistant to aging. It becomes brittle, cracks and falls off, resulting in a decline in waterproofing effect. Asphalt also contains harmful substances to the human body, and has a foul smell, which increases environmental pollution.

The purpose of the present invention is to provide a non-bitumen emulsion waterproof coating. The paint is white or light-colored, non-toxic, odorless, and highly elastic-plastic.

The non-asphalt emulsion type waterproof coating provided by the present invention adopts SBS rubber (styrene-butadiene-styrene rubber) (792 type or 802 type) as the main material, and replaces asphalt with rosin modified resin or turpentine derivatives As a tackifier, neoprene latex, acrylic latex, polyethylene-vinyl acetate emulsion, polyvinyl acetate-acrylic emulsion, polypropylene, polyisobutylene, butyl rubber, EPDM rubber are used as modifiers to give coatings Elasticity, adhesion, aging resistance and thermal stability, the plasticizers used are mineral oil, chlorine wax, phthalates, 12-18 carbon fatty acids, castor oil, palm oil, coconut oil, linseed oil , Epoxidized soybean oil, the solvent is acetone, toluene, ethyl acetate. The nonionic emulsifier used in the present invention is polyoxyethylene fatty alcohol ether and sulfonate thereof, polyoxyethylene fatty alcohol, polyoxyethylene alkanol ether, polyoxyethylene sorbitol fatty acid ester, and used anionic emulsifier is succinic acid Sodium ester sulfonate, sodium 12-18 alkyl (aryl) sulfonate, sodium succinic acid polyoxyethylene fatty alcohol (phenol) ether sulfonate. Solvents are acetone, toluene, ethyl acetate. The waterproof coating formula provided by the present invention contains following ingredients (parts by weight):

SBS rubber (styrene-butadiene-styrene rubber) 8-11

Rosin or turpentine derivatives 12-14

Modifier 0-5

Plasticizer 2-4

Nonionic emulsifier 1-1.4

Yinjizi emulsifier 0.3-0.5

Solvent 4-6

Packing 20-25

Pigment 0.1-1.1

Add tap water to 100

Solid content 50-60%

The emulsion-type waterproof paint provided by the invention is used for waterproof and plugging of buildings. Compared with the emulsion coatings in the prior art, it has light color (or white), non-toxic and odorless, high elastic-plasticity, high strength, excellent low-temperature flexibility and aging resistance, and the construction process and storage period are safe and reliable. To pollute the environment, adding reflective materials on the surface of the coating also has multiple functions of reflection, radiation reflection, heat insulation and heat dissipation, and the cost is only 50-60% of the existing emulsion type waterproof coating. Measurement results of emulsion type waterproof coating (compared with existing waterproof coating)

The manufacture method of the non-bitumen emulsion type waterproof paint provided by the present invention is as follows: styrene-butadiene-styrene rubber, rosin or turpentine derivatives are mixed in solvent A solution at 80-100 ° C, and then dropped into In the seed emulsion composed of emulsifier, water, and a small amount of A solution, a water-in-oil emulsion is formed, and a large amount of hot water is added to reverse it into a stable oil-in-water emulsion. The solvent is recovered by vacuuming, and then fillers and pigments are added, and stirred at room temperature Discharge. If the modifier is emulsion type, it can be mixed with the paint after emulsification, and then add fillers, pigments, etc., that is, emulsify first and then modify. Miscible in solution A and then emulsified, that is, modified first and then emulsified.

Example 1

                            

SBS (Type 792) 10

Turpentine Derivatives 14

Neoprene latex 4.2

Chlorine wax 3.3

0P-9 1.3

Sodium lauryl sulfate 0.3

Toluene 5

Calcium carbonate 23

Pigment 0.9

Tap water 38

Solid content 57% Preparation process:

1. Preparation of liquid A: Heat SBS rubber, turpentine derivatives, chlorine wax, and toluene (20 parts) at 80-100°C to form a transparent solution;

2. Preparation of liquid B: use 10 parts of water, 6 parts of liquid A, and emulsifier at 65°C to stir into a milky form, which is the seed emulsion B;

3. Evenly drop the remaining liquid A into liquid B at 65°C for about 1 hour to form a water-in-oil emulsion, then add 28 parts of hot water at 65-70°C to convert it into a water-in-oil emulsion;

4. After steaming 18 parts of toluene under reduced pressure at 60°C and 740 mm Hg, transfer the latex into a fine grinding agitator, add chloroprene latex, calcium carbonate, pigment, etc. and stir until the material is evenly discharged.

Example 2

                              

SBS rubber (type 802) 10.3

Rosin modified resin 12.0

Ethylene-vinyl acetate resin (EVA) 3.5

Castor oil 3.5

Pingpingjia-0 1.4

Sodium dodecylbenzenesulfonate 0.4

Ethyl acetate 5.0

Calcium carbonate 24.0

Pigment 0.1

Tap water 39.8

Solid content 54.8% Preparation process:

1. Preparation of liquid A: Dissolve SBS, EVA, rosin modified resin, and castor oil in 20 parts of ethyl acetate at 70-80°C;

2. Preparation of liquid B: Stir 10 parts of water, emulsifier, and 6 parts of liquid A at 65°C to form seed emulsion B;

3. Within 1 hour at 65°C, drop liquid A into liquid B evenly to form a water-in-oil emulsion, and then add 29.8 parts of hot water at 60-70°C dropwise to convert it into an oil-in-water emulsion;

4. After steaming 15 parts of ethyl acetate at 50°C and 740 mm Hg, transfer the latex into a fine grinding mixer, add calcium carbonate and pigments, and stir until the material is evenly discharged.

Claims (6)

1, a kind of non-asphalt emulsion water-proof coating, it is a host with benzene alkene-Afpol, it is characterized in that with rosin or turps derivative be tackifier, adds properties-correcting agent, softening agent and emulsifying agent, add pigment, filler again, its prescription contains following composition: (parts by weight)

Styrene-butadiene-styrene rubber (SBS) 8-11

Rosin or turps derivative 12-14

Properties-correcting agent 0-5

Softening agent 2-4

Nonionic emulsifying agent 1-1.4

Anionic emulsifier 0.3-0.5

Solvent 4-6

Filler 20-25

Pigment 0.1-1.1

Tap water adds to 100.

2, according to the waterproof paint described in the claim 1, the properties-correcting agent in it is characterized in that forming is polychloroprene latex, acrylic latex, the polyethylene vinyl acetate emulsion, Vinyl Acetate Copolymer-ACRYLIC EMULSION, polypropylene, polyisobutene, isoprene-isobutylene rubber, terpolymer EP rubber.

3, according to the waterproof paint described in the claim 1, the softening agent that it is characterized by in the composition is cured, the phthalic ester of Dormant oils, chlorine, 12-18 carbon fatty acid, or Viscotrol C, plam oil, Oleum Cocois, oleum lini, epoxidised soybean oil.

4, according to the waterproof paint described in the claim 1, the nonionic emulsifying agent that it is characterized by in the composition is polyoxyethylene aliphatic alcohol ether and sulfonate thereof, the polyoxyethylene Fatty Alcohol(C12-C14 and C12-C18), polyoxyethylene alkane phenolic ether, the polyoxyethylene sorbitol fatty acid ester, anionic emulsifier described in the composition is the succinate sodium sulfonate, 12-18 alkyl (aryl) sodium sulfonate, Succinic Acid polyoxyethylene Fatty Alcohol(C12-C14 and C12-C18) (phenol) ether sulfonic acid sodium.

5, according to the waterproof paint described in the claim 1, the solvent that it is characterized by in the composition is acetone, toluene, ethyl acetate.

6, a kind of method for preparing the waterproof paint described in the claim 1, it is characterized in that styrene-butadiene-styrene rubber, rosin or turps derivative are dissolved in solvent in 80-100 ℃ makes A solution, splash into then in the seed emulsion by emulsifying agent, water, a small amount of A solution composition, generate water in oil emulsion, then in a large amount of hot water, reverse and be oil-in-water stable emulsion, vacuumize the recovery solvent then, add filler, pigment, the room temperature that stirs discharging; Solid state properties-correcting agent should shred with SBS with miscible in A solution, and emulsion-type properties-correcting agent can directly mix with emulsive coating.