About putty, this time to understand! Putty Question 33

China Paint Online News Information
in the construction process found that we do not know enough about putty so today to organize an article on science and technology to do a unified answer!1, how are putty on the market classified?(1) according to the status: paste putty, powdered putty, glue filler or cement.(2) according to water resistance: water-resistant putty, non-water-resistant putty (e.g. 821 putty).(3) according to the use of the occasion: inner wall putty, outer wall putty.(4) according to the function: water-resistant putty, elastic putty, high-bounce waterproof putty.the composition of 2 and putty?(1) 821 putty is mainly made of white powder, add a little starch glue and CMC (hydroxymethyl cellulose), such putty is not adhesive, water-resistant.(2) water-resistant putty paste is mainly composed of polymer organic matter, gray calcium powder, ultra-fine fillers and water preservation agents, such putty whiteness is good, high bonding strength, with water resistance, is rigid, alkaline products.(3) water-resistant putty powder is mainly composed of calcium carbonate, gray calcium powder, cement, organic powder, water preservation agent, etc. , such products have a high bonding strength and water resistance, is rigid, alkaline products.(4) Emulsion-type putty mainly consists of polymer emulsion, ultra-fine filler and water preservation agent, such putty has excellent water resistance, flexibility, can be used on a variety of substrates, but the price is high, is a neutral product.are the disadvantages of 3, 821 putty?(1) adhesion is poor, bonding strength is low, individual home high-quality enterprises in order to overcome this defect, in the substrate brush once the interface agent. Increase costs and work hours.(2) is not resilient.(3) will soon appear powdering after moisture.(4) in a short period of time cracking, peeling, shedding and other phenomena. Especially in the inner wall moisturizer to deal with, even with cloth to do a full closure treatment is difficult to put an end to the above phenomenon. After the completion of the construction will bring many repairs, to the user inconvenience.(5) to whitewash the walls again, the original 821 putty needs to be removed, laboring and polluting the environment.(6) surface is not delicate enough, poor texture.4, water-resistant putty what are the advantages?water-resistant putty is one of the best alternatives to 821 putty.(1) strong adhesion, high bonding strength, a certain degree of toughness, good breathability.(2) after moisture will not appear powdering phenomenon, with strong water resistance.(3) when using water-resistant putty wall will not appear cracking, peeling, shedding and other phenomena.(4) the wall using water-resistant putty feel delicate, soft,good texture.(5) can be directly scrubbed or painted directly with water-resistant putty wall contamination. And can improve the performance and service life of the coating.(6) repaint the interior wall, there is no need to remove the wall and paint the interior wall directly.(7) water-resistant putty is an environmentally friendly material that does not produce any pollution to indoor air.advantages of putty powder compared to 5?powder is a mixture of polymer powder and powdered glue, which can be used to level the walls by mixing it with water in a certain proportion. Because formaldehyde can only exist in the form of gaseous or liquid, it is more environmentally friendly to have the least or no formaldehyde content in putty powder.6, which file restricts the use of ordinary putty represented by 821?As stipulated in document No. 837 of Beijing Building Materials (2007) No. 837 issued jointly by the Beijing Municipal Construction Commission and the Regulatory Commission - "Notice on the Release of the Fifth Batch of Building Materials and Construction Process Catalogs banned and restricted in Beijing", the use of "water-resistant gypsum-type scraping wall putty" is restricted because of "poor water resistance and low strength", and its limited use is for residential projects, and alternative products are water-resistant putty.7, in the decoration process, when and how to use putty?the top of the paint wall, batch the putty first, then primer, and then paint. 8, scraping putty in the quota is how to set? batch scraping putty does not have the corresponding quota, is a process, generally included in the paint project. 9, the outer wall putty can be used indoors? Will there be environmental problems? the outer wall putty can be used indoors, but indoor is best to use the inner wall putty, the outer wall putty is generally less environmentally friendly than the inner wall putty. 10, ordinary putty (such as 821 putty) easy to powder? (1) ordinary putty (e.g. 821 putty) is mainly made of white powder, add a little starch glue and CMC (hydroxymethyl cellulose), but also using methyl cellulose and double fly powder preparation, such putty has no adhesion, water resistance. (2) cellulose and water dissolved can absorb water expansion, different manufacturers of product water absorption rate is different, cellulose in putty play a water preservation role, dry putty only temporarily have a certain strength, but after a long time will slowly de-powder, which is closely related to the molecular structure of cellulose itself. (3) such putty, loose, high water absorption rate, easy to powder, no strength, no elasticity. If the construction paint on top of it, low PVC is easy to burst; High PVC is easy to dehydration contraction cracking; Because of its high water absorption rate, it affects the coating film and construction effect. 11, putty in the lack of glue will produce what phenomenon? Putty glue is insufficient, the most direct performance is the putty layer loose, surface whitening, paint when painting a large amount of paint, poor leveling, rough surface after the film, difficult to form a dense paint film. Shortly after the user moved to a new home, the wall will appear paint film peeling, foaming, shedding, cracking and other phenomena, so that the user tried to build a better home destroyed once. If the user wants to change the status quo, then the poor quality putty must be completely eliminated, leaving no residue, and then, to buy quality putty and latex paint, repeatedly moved into the new home before all the construction procedures, so that the user will not only suffer huge economic losses, but also will face how to deal with the interior has been installed furniture and other decorative materials embarrassing situation. the use of corrosive chemical raw materials in 12 and putty, what is the impact? Many putty, especially putty powder, often contain corrosive chemical raw materials, body contact caused by redness and festering of the skin, the construction of the wall process, a variety of decorative materials, especially with putty contact with a wider range of wooden lines, wooden doors and windows back obvious color change, soft or off, construction latex paint, paint film yellowing, color loss or fall off, after moving into the furniture, the service life of furniture is greatly shortened. 13, putty why drop powder? main reason is that the grass-roots wall is too dry, wind speed is too large, water absorption is too strong, putty on the wall can not be normal hydration curing, resulting in surface powdering. This requires wetting it with a roller brush and then putty. 14, the cause of water-resistant putty skin? (1) the grass root strength is too low, powdered or shedded, resulting in surface putty empty drum, or even peeling. Most commonly seen in the water-resistant putty in ordinary putty (including large white powder, double fly powder, lime powder) layer and whitewashed gypsum layer surface. (2) the grass-roots walls are not treated clean, there are pontoon or other debris caused by water-resistant putty can not be properly attached. (3) cement improper maintenance, grass-roots release, resulting in the cement surface adhesion decreased, water-resistant putty can not be properly attached. 15, water-resistant putty in what circumstances prone to cracking phenomenon? (1) due to a single shawl too thick, putty in the maintenance period to form a micro-crack; (2) high temperature environment. (3) dry and windy environment. (4) low temperature environment. 16, causing water-resistant putty foaming factors? (1) the base cement maintenance period has not passed, the alkaline is too large, resulting in putty layer in the maintenance period of high alkaline, dry after leaving foaming marks. (2) the grass-roots wall is too dry, scraping too fast, resulting in putty layer pressure on the air to produce air drums, repeated scraping several times can be resolved. 17, putty empty drum how to produce? (1) the grass-roots mishandling, so that putty layer and grass-roots contact is not close enough to form a mezzanine. (2) there is a dense layer between the base and the putty layer, so that the air can not spread normally to the grass. 18, what causes water-resistant putty yellowing? (1) is constructed simultaneously with polyester paint (paint) or release agent, causing the putty film to turn yellow. (2) the grass has oil or other grease dirt, not cleaned, resulting in putty film yellowing. (3) putty film is contaminated with rust or other colored substances, which may cause the putty film to turn yellow. (4) temperature is too low (below 5 degrees C). how long can the water-resistant putty on the wall dry out in sunny, dry weather? open the window ventilation, almost 3 days can be dried through. 20, putty batch how many times appropriate? to see the new and old degree of the wall to determine: (1) the new house words only need to batch two times on it, batch two times together sand once, can be on the wall latex paint. (2) second-hand room of the words batch three times is better, approved three times together sand once, can be on the wall latex paint. 21, how to use water-resistant putty to treat the wall? first step, the original wall is removed clean to the base. second step, the original wall repair. After the cracked, empty drum area is added with a mesh band or d'or psorias, fill the wall with water-resistant putty. the third step, the scraper is polished with sandpaper, the dust is cleaned, and the paint is brushed directly. 22, scrape putty paste good, or scrape putty powder good? scraping putty paste is convenient and fast, do not mix with water can be directly opened for use, but putty paste shelf life is shorter. Scraping putty powder mixed with water after the air consistency can be freely mastered, and the shelf life is long. 23, choose to make putty with building glue should pay attention to what? (1) the first category is polyethylene alcohol as the main raw material, warmed building glue, dark transparent glue-like, commonly known as 107 glue. At present, there are other brands on the market such as 801 glue, 803 glue, 901 glue, such as very sticky, wire-like dark transparent glue, also belongs to this kind. This kind of adhesive viscosity is high, strong adhesion, good hardness after drying with filler. Disadvantages are: formaldehyde, poor environmental protection. To quote a building materials testing center published in the media a paragraph: 107 glue name "polyethylene alcohol shrink formaldehyde", has a stimulating odor, containing a large number of free formaldehyde, formaldehyde has been recognized as a strong carcinogen, it enters the human body through the respiratory system, harming human health. 801 glue is 107 glue makeover products, is in the production of 107 glue process added a production process, that is, the use of urea to shrink free formaldehyde into urinary aldehyde, the purpose is to reduce the content of free formaldehyde, performance as a stimulus odor reduction, but with the existing crude production equipment, free formaldehyde will not be reduced thoroughly, and urinary aldehyde can easily be reduced into formaldehyde and urea. At present, the free formaldehyde content of 107 or 801 building glue on the market is significantly higher than the relevant national standards. The original industry standard for 107 or 801 glues was 5g/k g ≤ free formaldehyde content. National standard gb18583- 2001 "Water-based reduced formaldehyde adhesive" as stipulated in the "Limit of Harmful Substances in Adhesives of Interior Decoration Materials" enforced on July 1, 2002, free formaldehyde content ≤1g// k g, with 107, 801 construction glue preparation of paint putty, in addition to the use of the process of releasing free formaldehyde directly poison construction workers, after the project, due to the outside layer of paint "protection" effect, putty free formaldehyde is more difficult to release clean. According to statistics from a hospital in Harbin, 90% of children with leukemia have their homes recently renovated and are related to free formaldehyde. (2) The second category is methyl fiber and synthetic emulsion as the main raw materials, temperature-re-matched building glue, latex white liquid- type, commonly known as 108 glue. The adhesive viscosity is moderate, no drawing phenomenon, when used it is best with cement, calcium gray, gypsum and other inorderable gel materials together. The disadvantages of the glue is: (1) if the quality of cellulose is not good, the preparation of putty batch scraping and grinding, cellulose fine fiber wire will be attached to the surface, not only affect the decorative effect, but also relatively waste paint. (2) when the site re-matching putty, such as not adding cement or gray calcium, gypsum, there will be low strength of the shrinking putty and other shortcomings. Advantages are: containing cement, or calcium gray, gypsum mixture has a better modified promotion, no formaldehyde, good environmental protection. 24, batch putty is directly using putty powder good, or use "talc powder and 108 glue" good? (1) putty powder is well tuned, only need to add water can be used, convenient construction, save time, is currently painters more commonly used also prefer to use the material. (2) "Talc powder plus 108 glue (or white latex)" needs one