Background technology
Along with the development of society, noise in environment is increasing, have a strong impact on the physical and mental health of people, sound pollution is to the harm of the health of people and daily life day by day by people are paid attention to, and the status of sound absorption function in many building functions of building is being increased gradually.A lot of people thinks that surface of wall is uneven by mistake and just has sound absorption function.In the hall that some are early stage, adopt cement plucking then to brush the finishing mode of common coating through metope of being everlasting, think that the structure of this surface irregularity has the effect of absorption to sound by mistake.In fact, this finishing mode does not have sorption to sound substantially.Because sound absorption mainly contains two kinds of modes, i.e. porous sound absorption and resonance sound-absorbing, porous sound absorption needs material internal to have the hole of connection, and resonance sound-absorbing needs cavity, and the structure being similar to cement plucking had not both had the inner hole be communicated with not have cavity, so substantially do not have sorption to sound yet.
Local poor because of sound-absorbing effect at many music halls, kino, theater etc., make tonequality also receive impact, a lot of noise can be produced, and sound-absorbing material not only can improve indoor tonequality environment, and also play very important effect to noise control.The kind of sound absorbent for building is a lot, and what current China production and application was many mainly contains gypsum decorative acoustic board, glass wool decoration acoustic absorption, rock (ore deposit) cotton decoration acoustic absorption, pearlite decorative acoustic board, polystyrene foamed plastics decoration acoustic absorption, metal finishing acoustic board, perforated microstructure acoustic board etc.The specification of these acoustic boards is generally 500mm 500mm, 600mm 600mm, thickness 15-20mm, and storage, transport and assembled trouble, need there be protection and ornament layer in some surface.And rock (ore deposit) is cotton to human body and bad environmental (carcinogenic); Polystyrene foamed plastics acoustic board ventilation property and thermotolerance bad, meet fire can discharge harmful gas; And porous metal plate sound-absorbing material and perforated microstructure acoustic board, cost is too high, is not also widely used.
Coating is because rich color, and decorate properties is good, and production and construction is easy, becomes one of most important building and ornament materials in construction work with certain provide protection.Along with the development of construction industry, the demand of coating grows with each passing day, and gives coating becomes people's effort in recent years target with sound absorption function.In prior art, indoor wall decoration is mostly adopt common coating or emulsion paint etc., though have there is certain waterproof action, do not possess the function of any sound-absorbing.General interior wall coating does not have sound absorption function, can not with helping solve noise problem.And existing sound deadening coating existing defects in sound-absorbing effect, production cost, environmental protection etc.Patent CN1425720A (application number 03118445.6) discloses a kind of sound-absorbing environment protection paint, this coating adopts flyash pearl of wafing to make light skeletal, to improve sound-absorbing effect, but closes due to the flyash pearl pore that wafts, be not connected, this coating acoustically effective is limited.Patent CNl429869A (application number 01145015.0) discloses a kind of special flashing and sound-absorbent coating for music hall, and this coating is to add light pearl stone and foam polystyrene particle provides acoustically effective.As previously described, meeting fire can discharge poison gas to foam polystyrene particle, and this coating exists potential safety hazard, and this invention is not also screened the light pearl stone selected, and sound-absorbing effect is also undesirable.
And the place of picture exhibition center, market, those crowd massings of public place of entertainment, safety to be focused on very much, especially fire, so coating used improves its fire resistance except noticing that its sound-absorbing effect is also noted that.
Summary of the invention
Object of the present invention provides a kind of inner wall polyurethane sound-absorbing frie retardant coating and preparation method thereof, this coating has good sound-absorbing effect and fire resistance, and have be coated with that membrane lifetime is long, adhesivity strong, lacquer painting intensity is large, water tolerance and the good feature of scratch-resistant.
The present invention is achieved in that
A kind of inner wall polyurethane sound-absorbing frie retardant coating, make the raw material that this coating comprises following parts by weight:
Base polyurethane prepolymer for use as 50 ~ 60 parts;
Rocryl 410 3 ~ 5 parts;
Butyl stearate 2 ~ 5 parts;
Aluminate coupling agent F-1 0.5 ~ 1.0 part;
Dispersion agent 0.2 ~ 0.4 part;
Stibium trioxide 13 ~ 18 parts;
Defoamer 0.3 ~ 0.5 part;
Ultrafine mica powder 6 ~ 10 parts;
Mixed solvent 15 ~ 18 parts;
Sound absorbent material 7 ~ 11 parts;
Described base polyurethane prepolymer for use as is the performed polymer with NCO end group, and molecular weight is between 10000-4000;
Described mixed solvent is the mixture that propylene glycol monomethyl ether adds water, and part by weight is 3:11;
Described dispersion agent is polyacrylic acid sodium salt DP-270;
Described defoamer is polyoxyethylene polyoxy propyl alcohol amidogen ether;
Described sound absorbent material is the mixture of described sound absorbent material glass bead and 40 ~ 60 object expanded vermiculites, part by weight 1:1.
A kind of inner wall polyurethane sound-absorbing frie retardant coating of the present invention, its production method comprises the following steps:
Per kilogram Rocryl 410 adds the dissolve with ethanol of the volumetric concentration 75-85% of 2.3 kilograms by weight, then mix with base polyurethane prepolymer for use as in a kettle., temperature of reaction 85 ~ 150 DEG C, adds aluminate coupling agent F-1, dispersion agent polyacrylic acid sodium salt DP-270 after 1.5 ~ 2.5 hours reaction times; Continue reaction 2.5 ~ 5.5 hours; Then butyl stearate, stibium trioxide, polyoxyethylene polyoxy propyl alcohol amidogen ether, ultrafine mica powder is added; Mixed solvent and sound absorbent material, mix and can obtain inner wall polyurethane sound-absorbing frie retardant coating product.
The preparation method of a kind of inner wall polyurethane sound-absorbing frie retardant coating of the present invention, its raw material also comprises: one or more in flow agent, antifreezing agent and anti-settling agent, and parts by weight are 2 ~ 5; Described flow agent is cellulose acetate butyrate; Described antifreezing agent is ethylene glycol; Described anti-settling agent is modified hydrogenated Viscotrol C.
Base polyurethane prepolymer for use as of the present invention is that be polymerized, with the performed polymer of NCO end group, molecular weight is between 10000-4000, and it has good physicals with isocyanic ester, polyethers for main raw material, and cohesive force is strong, normal temperature moisture curing.
Rocryl 410 of the present invention; For colourless transparent liquid.Be dissolved in common organic solvents, still water-soluble; For the reactive thinner in Radiation-curing system and linking agent, also can be used as resin cross-linking agent, plastics, rubber modifier, can be used for the properties-correcting agent producing thermosetting coating, tackiness agent, fibre finish and synthetic resins multipolymer.Rocryl 410, as a kind of linking agent, preparing in polyurethane coating process the adhesivity that adds and can increase coating and lacquer painting intensity, improving chemical stability, the antiseptic power of coating, plays crosslinking curing effect,
Butyl stearate of the present invention is colourless or pale yellow oily liquid body, micro-tool fatty taste, and be a kind of softening agent, its plasticizing efficiency is high, and volatility is little, when butyl stearate is used for coating, can improve the glossiness of paint film, water tolerance and scratch-resistant.
Aluminate coupling agent F-1 aluminate coupling agent F-1 of the present invention is nontoxic, odorless, look white, is uniformly dispersed, and adaptive temperature is wide, and steady quality, applied widely, addition is little, easy to use.Compared with other coupling agent (as titanic acid ester, boric acid ester etc.), inorganic powder after the process of aluminate coupling agent activation modification, except steady quality, also have that look shallow is, nontoxic, taste is little and to the cooperation thermal stabilization of PVC and oilness, applied widely, need not thinner, easy to use, cheap.The inorganic end of parent of coupling agent and the organic end of parent can respectively with inorganic filler surface and organic resin generation chemical reactions or form tangled structure, enhance the interface compatibility of inorganic powder and organic resin, so use aluminate coupling agent modification, obviously can improve the physical and mechanical properties of goods, product water-intake rate is reduced, oil number reduces, fillers dispersed is even, through the various fillers of this product process, its surface property can not only be changed, the secondary structure of broken particle, and can loading level be increased considerably, improve processing characteristics, improve goods output, quality, reduce production technology cost, there is direct economic benefit, add aluminate coupling agent F-1 and can also play the dispersiveness improved face (filling out) and expect, shorten milling time, improve fineness, brightness fall low viscous positive effect.
Stibium trioxide of the present invention is a kind of white pigment is also pigment conventional in anti-flaming dope, because it at high temperature can react with chlorine-containing resins, generates antimony chloride, can suppress fire spread, play flame retardant effect.
Ultrafine mica powder of the present invention is except having the performances such as high electrical insulating property, antiacid caustic corrosion, elasticity, toughness and sliding, heat-resistant sound-insulation, thermal expansivity are little, and take the lead in again releasing the feature such as lamellar body two smooth surface, radius-thickness ratio is large, form is regular, strong adhesion; As the functional filler of coating, its physical strength can be improved, strengthen the anti-aging and corrosion resistance nature of toughness, sticking power etc.
Mixed solvent of the present invention is the mixture that propylene glycol monomethyl ether adds water, part by weight is 3:11, propylene glycol monomethyl ether has hydroxyl again due to ether existing in its molecular structure, thus its solubility property is very excellent, is used for the industry such as coating, ink, printing and dyeing, agricultural chemicals, Mierocrystalline cellulose, acrylate as solvent, dispersion agent or thinner.Also can be used as fuel antifreezing agent, clean-out system, extraction agent, non-ferrous metal ore agent etc.Propylene glycol monomethyl ether adds the effect can playing film coalescence aid in paint making process.
The mixture of sound absorbent material glass bead of the present invention and 40 ~ 60 object expanded vermiculites; part by weight 1:1; there is good fire line and sound absorbing; glass bead forms certain granule strength due to surperficial vitreous; physicochemical property is very stable; ageing-resistant weathering resistance is strong, has excellent Jue Re ﹑ Fang Huo ﹑ sound absorption qualities, is applicable to making light filling aggregate and Jue Re ﹑ Fang Huo ﹑ Xi Yin ﹑ lagging material in numerous areas.And expanded vermiculite also has good water-absorbent, sound-proofing, thermal insulation, resistivity against fire and frost resistance, the stable chemical nature of expanded vermiculite, water insoluble, nontoxic, tasteless, have no side effect, there is very strong thermal and insulating performance.
The invention has the beneficial effects as follows:
1, the inner wall polyurethane sound-absorbing frie retardant coating film forming matter produced of the present invention due to after adding the materials such as Rocryl 410, butyl stearate, aluminate coupling agent F-1, dispersion agent polyacrylic acid sodium salt DP-270, stibium trioxide and mixed solvent in base polyurethane prepolymer for use as, good chemically crosslinked effect can be played, thus film forming matter is had at normal temperatures stablize tough and tensile, shrinking percentage is little, bonding strength is high, scratch-resistant is strong, and can extend the coating life-span.
2, the sound absorbent material glass bead added in the present invention and 40 ~ 60 object expanded vermiculites have good fire line and sound absorbing; glass bead forms certain granule strength due to surperficial vitreous; physicochemical property is very stable; ageing-resistant weathering resistance is strong; there is excellent Jue Re ﹑ Fang Huo ﹑ sound absorption qualities, be applicable to making light filling aggregate and Jue Re ﹑ Fang Huo ﹑ Xi Yin ﹑ lagging material in numerous areas.And expanded vermiculite also has good water-absorbent, sound-proofing, thermal insulation, resistivity against fire and frost resistance; the stable chemical nature of expanded vermiculite; water insoluble; nontoxic, tasteless; have no side effect, there is very strong thermal and insulating performance, therefore add sound absorbent material glass bead and 40 ~ 60 object expanded vermiculites make coating have good fire line and good sound-absorbing effect.
3, use water as solvent, cost is low, economic and practical, and construction is simple; The coating made has good sound-absorbing effect and fire resistance, and have be coated with that membrane lifetime is long, adhesivity strong, lacquer painting intensity is large, water tolerance and the good feature of scratch-resistant.