Two component polyurethane does not fire a grade foam gap filler, its preparation and canned gap filler
Technical field
The invention belongs to encapsulant field, be specifically related to a kind of gap filler containing polyurethane and preparation thereof.
Background technology
Cranny filler of polyurethane foam is a kind of one pack system, moisture-curable, multiduty polyurethane foam filling elaxtic seal. Cranny filler of polyurethane foam is the special polyurethane products filling in pressure inhalator jar by components such as base polyurethane prepolymer for use as foaming agent catalyst. Being sprayed mist colloid to position to be onstructed by supporting applicator gun or manual jet pipe during construction, short-term completes molding, foaming, bonding and seal process. Its cured foam elastomer has bonding, waterproof, resistance to expands with heat and contract with cold, heat insulation, sound insulation is even fire-retardant premium properties such as (limit flame retardant types), is widely used in being filled with a sealing of building doors and windows side seam, member expansion joint and hole place.
The general surface drying time of cranny filler of polyurethane foam is within 10 minutes (under 20 DEG C of environment of room temperature), the absolutely dry time is different with ambient temperature and humidity, generally, summer is absolutely dry, and the time is about 4-6 hour, then needs 24 hours winter or the longer time could be absolutely dry about zero degree. In normal conditions of use (and when its appearance has cover layer), estimating that its service life is not less than 10 years, in the temperature range of-10 DEG C~80 DEG C, cured foam body all keeps good elasticity and cohesive force.
Since this product popularization and application at home beginning of this century last century end, its market demand expands rapidly, the annual consumption of whole nation construction market is about about 30,000,000 tanks at present, the raising required along with construction quality and the popularization of energy-saving and cost-reducing type building, the consumption of this series products is from now on also by steady-state growth.
At present, the commonly used floride-free foaming agent not damaged the ozone layer of the conventional formulation of this type product. But the propellant filled in tank body often brings the risk of blast. Improve the formula of gap filler and canned structure, it is possible to solve its unsafe factor.
Summary of the invention
For the deficiencies in the prior art part, the purpose of the present invention is to propose to a kind of method that Nacl is produced in strong brine zero-emission.
It is another object of the present invention to propose a kind of strong brine zero-emission and produce the system of Nacl.
The technical scheme realizing the object of the invention is:
A kind of two component polyurethane does not fire a grade foam gap filler, and the composition of joint filling is made up of component A and B component,
Described component A consists of the following composition: PEPA 100 mass parts, one fluorine dichloroethanes 28~32 mass parts, methyl-phosphoric acid dimethyl ester (DMMP) 14~18 mass parts, three (2-carboxyethyl) phosphine (TCEP) 20~30 mass parts, silicone oil 2 mass parts, catalyst 1~2 mass parts, pentamethyl-diethylenetriamine 0.2~0.4 mass parts, potassium silicate 70~90 mass parts, chlorinated paraffin 10~15 mass parts;
Described B component is isocyanates.
The gap filler that the present invention proposes, is mainly composed of PEPA in component A, DMMP and TCEP is fire retardant.
Preferably, PEPA is hydroxyl value is the PEPA of 200-400mgKOH/g.
The solids content of described potassium silicate is more than 98%, and the chlorinity of described chlorinated paraffin is 50~70%.
Using a large amount of potassium silicate in the gap filler that the present invention proposes, potassium silicate is commonly called as potash glass, and solids content is liquid under the potassium silicate room temperature more than 98%, and mixing dispersion effect is good, expands when meeting fire, forms duricrust, it is achieved fire-retardant effect. Chlorinated paraffin has lubrication, chlorinity be 50~70% fireproofing function preferably. It is more preferably chlorinated paraffin-52.
Wherein, described catalyst is catalyst PC-41 and catalyst DMP-30, and the mass ratio of the two is 0.5~0.7:1.
Above two one is kicker, and one is curing catalysts, and two kinds combine use, and expansion rate is fast. Catalyst DMP-30 is only used to there will be bubble phenomenon of collapsing.
It is highly preferred that described B component is isocyanates PM-200.
Wherein, the preparation method of described component A is: in room temperature environment, PEPA, a fluorine dichloroethanes, DMMP, TCEP, silicone oil, catalyst PC-41, catalyst DMP-30, pentamethyl-diethylenetriamine mix, after high-speed stirred 1~2 minute, add potassium silicate and chlorination stone, then high-speed stirred 20~40 minutes; The rotating speed of described high-speed stirred is 1000-1500 rev/min.
A kind of canned gap filler, is that the two component polyurethane of the present invention contained in canister does not fire a grade foam gap filler; Component A is placed in A capsule, and B component is placed in B capsule, the outlet connection outlet pipeline of A capsule and B capsule, and outlet conduit arranges pressing type valve, and the end of outlet conduit is nozzle; Region in canister tank skin, outside A capsule and B capsule is built with the third butane.
Wherein, A capsule and B capsule are same material, are that one is raw material in nitrile rubber, organic silicon rubber and polyurethane elastomer, and die pressing is made.
Further, the outlet aperture of A capsule is the outlet aperture of 1mm, B capsule is 1.8mm, is provided with static mixer in described outlet conduit.
Described static mixer is the device arranging mixing component in the duct, and pipeline has two imports, and two components respectively enter, and be stirred, sprayed by nozzle in pipeline. In the present invention, the outlet of A capsule is component A and enters the import of static mixer, and its aperture is that the outlet of 1mm, B capsule is B component and enters the import of static mixer, and its aperture is 1.8mm.
Preferably, canister volume, A capsule volume, B capsule volume, the third butane volume ratio be 900:180~220:5:3~280:120~150.
The beneficial effects of the present invention is:
The gap filler that the present invention proposes, after joint filling, curing rate is fast, and mechanical strength is good; For not firing the foamed materials of level;
The canned gap filler that the present invention proposes, overcomes and is separately provided propellant and causes that cranny filler of polyurethane foam is inflammable, explosive problem; With two component polyurethane be attached separately in two capsules of tank body with the third butane do material propellant make dual component material extrusion mixing, reach foaming purpose.
Accompanying drawing explanation
Fig. 1 is the canned gap filler structure chart that the present invention proposes;
Fig. 2 is Fig. 1 pressing type valve mechanism schematic diagram.
In figure, 1 is static mixer, and 2 is A capsule, and 3 is B capsule, and 4 is canister, and 5 is nozzle, and 6 is pressing type valve.
Detailed description of the invention
Now with following example, the present invention is described, but is not limited to the scope of the present invention. The means used in embodiment, if no special instructions, all use the means that this area is conventional.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment 1: two component polyurethane does not fire a grade foam gap filler
Gap filler is made up of component A and B component, the preparation of component A: in 20 DEG C of environment of room temperature, (Si Kerui polyurethane material company limited produces to take PEPA SKR-240B, hydroxyl value 240 ± 10) 100 mass parts, one fluorine dichloroethanes 30 mass parts, DMMP15 mass parts, TCEP25 mass parts, silicone oil 2 mass parts, catalyst PC-410.6 mass parts, catalyst DMP-300.9 mass parts, pentamethyl-diethylenetriamine 0.3 mass parts mixes, 1500 revs/min of high-speed stirred are after 1 minute, add potassium silicate (solids content more than 98%) 80 mass parts, chlorinated paraffin-52 13 mass parts, high-speed stirred 30 minutes.
B component: isocyanates PM-200.
Embodiment 2: canned gap filler
The tank structure used is shown in Fig. 1.
Containing embodiment 1 gap filler processed in 900mL canister 4 (aluminium alloy can), component A is placed in A capsule 2, and B component is placed in B capsule 3, the outlet connection outlet pipeline of A capsule and B capsule, and outlet conduit is provided with pressing type valve 6; In canister tank skin, A capsule and B capsule outer equipped with 130mL the third butane.
See Fig. 2, in pressing type valve 6, have two spheroids to fill out the outlet at A capsule outlet and B capsule respectively. Then can spray component A and B component (the third butane does not gush out, and plays the effect of extruding capsule) by lower valve simultaneously.
A capsule and B capsule are soft capsule, are be made with nitrile rubber die pressing.
Wherein, the outlet aperture that the outlet aperture of A capsule is 1mm, B capsule is 1.8mm, is connected to two imports of static mixer 1, and the port of export of static mixer 1 arranges nozzle 5. It is provided with agitating element in the pipeline of static mixer 1, gets final product automatic stirring when propellant pushes. Propellant is the third butane.
Component A material 208 grams is loaded A capsule, B component 343 grams loads B capsule, at the operation temperature below 20 DEG C, the third butane is loaded canister (the third butane below 20 DEG C of temperature is liquid), then A, B capsule is loaded tank body then installation outlet pipeline. Obtain canned gap filler.
Embodiment 3
The gap filler that embodiment 2 prepares is sprayed at cement matrix surface, within 3 seconds, bubbles at once, becomes rapidly big, within 10 minutes, solidifies, reaches work hardness, can carry out performance test after 4 hours. Gap filler is sprayed at wood surface and surface of metal product, tests the performance of dried joint filling respectively.
Mechanics Performance Testing: be 0.1MP with cement products surface adhesive strength, is 0.08MP with surface of metal product adhesive strength, is 0.096MP with wood surface adhesive strength. Result is superior or equal to existing products in markets.
Combustibility is tested: use butane blowtorch burning material 20 minutes. Without combustion phenomena.
Material characteristics: 5 DEG C-45 DEG C can normally use.Hardening time is 20 minutes.
Above embodiments is only that the preferred embodiment of the present invention is described; not the scope of the present invention is defined; under the premise designing spirit without departing from the present invention; various modification that technical scheme is made by this area ordinary skill technical staff and improvement, all should fall in the protection domain that claims of the present invention are determined.