2
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What are the disadvantages of ordinary putty? A: (1) poor adhesion and low bonding strength
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What are the advantages of water-resistant putty? Answer: water resistant putty is the best substitute for ordinary putty（ 1) Strong adhesion, high bonding strength, certain toughness and good air permeability（ 2) There will be no pulverization after moisture, and it has strong water resistance（ 3) When water-resistant putty is used, the wall surface will not crack, peel, fall off, etc（ 4) The walls with water-resistant putty have fine hand feel, soft appearance and good texture（ 5) After the wall surface with water-resistant putty is polluted, it can be directly scrubbed or directly brushed with interior wall paint
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How are the putty on the market classified? Answer: (1) according to the status: paste putty, powder putty, glue filler or cement（ 2) According to water resistance: water resistant putty and non water resistant putty (such as 821 putty)（ 3) According to the application occasion: interior wall putty and exterior wall putty（ 4) According to function: waterproof putty, elastic putty and high elastic waterproof putty
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The environmental protection of exterior wall putty is generally less than that of interior wall putty
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If users want to change the current situation, they must remove all the inferior putty without leaving any residue, and then purchase qualified putty and emulsion paint, and repeat all the construction procedures before moving into the new house
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Cellulose plays a role in keeping water in the putty
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This kind of putty has good whiteness, high bonding strength and water resistance
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It is a process, which is generally included in the painting project
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In comparison, what are the advantages of putty powder? A: putty powder is a mixture of polymer powder and powdered glue
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Because formaldehyde can only exist in gaseous or liquid form, the content of formaldehyde in putty powder is the least or even no, which is more environmentally friendly
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It can be solved by repeated scraping for several times
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It is a rigid and alkaline product（ 3) Water resistant putty powder is mainly composed of calcium carbonate, lime calcium powder, cement, nock redispersible emulsion powder, water retaining agent, etc
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5
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How is puttying specified in the quota? Answer: there is no corresponding quota for puttying
What happens when there is insufficient glue in putty? A: the most direct manifestation of insufficient putty glue is that the putty layer is loose, the surface is powdered, the paint consumption is large when brushing the top coat, the leveling is poor, and the surface is rough after film formation, so it is difficult to form a dense paint film
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In the process of construction on the wall, various decorative materials, especially wood wire strips, wooden doors and windows that are widely in contact with putty, obviously change color, soft or fall off
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Under what circumstances is water-resistant putty prone to cracking? Answer: (1) micro cracks are formed in the putty during the curing period due to the single coating thickness（ 2) Construction under high temperature environment（ 3) Construction in dry and windy environment（ 4) Construction under low temperature environment
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If the topcoat is applied on it, low PVC is easy to burst; High PVC is easy to dehydrate, shrink and crack; Due to its high water absorption, it affects the film-forming and construction effect of finish paint
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What are the components of putty? A: (1) ordinary putty is mainly made of white powder, a little starch ether and CMC (hydroxymethyl cellulose)
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The water absorption of products from different manufacturers is different
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17
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12
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What impact will be caused by the use of corrosive chemical raw materials in putty? A: many putty, especially putty powder, often contain corrosive chemical raw materials, resulting in skin redness, swelling and ulceration after physical contact
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This kind of putty has no adhesion and is not water-resistant（ 2) After dissolving cellulose and water, it can absorb water and expand
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Why does putty lose powder? A: the main reason is that the base wall is too dry, the wind speed is too high, the water absorption is too strong, and the putty cannot be hydrated and solidified normally after being put on the wall, resulting in surface pulverization
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This requires wetting with water with a roller brush first, and then applying putty
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837 document – Notice on Issuing the catalogue of the fifth batch of building materials and construction processes prohibited and restricted in Beijing” jointly issued by the Beijing Municipal Construction Commission and the Planning Commission, it is clearly stipulated that the use of “water-resistant gypsum wall scraping greasy child” is restricted due to “poor water resistance and low strength”, The scope of its limited use is residential engineering, and the alternative products are various water-resistant putty
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It is common to make water-resistant putty on the surface of ordinary putty (including big white powder, double fly powder and lime powder) layer and plastering gypsum layer（ 2) The wall surface of the base course is not cleaned, and there is floating soil or other sundries, which makes the water-resistant putty unable to adhere normally（ 3) Improper cement curing and demoulding of base course lead to the decrease of cement surface adhesion and the failure of normal adhesion of water-resistant putty
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In order to overcome this defect, some high-quality home decoration enterprises brush an interface agent on the substrate
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Increase costs and work hours（ 2) No toughness（ 3) Pulverization will occur soon after moisture（ 4) Cracking, peeling and falling off occur in a short time
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The dried putty only has a certain strength temporarily, but it will slowly de powder after a long time, which is closely related to the molecular structure of cellulose itself（ 3) Such putty has the advantages of looseness, high water absorption, easy pulverization, no strength and no elasticity
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After mixing with water in a certain proportion, it can be used to level the wall
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How is putty hollowing produced? Answer: (1) improper treatment of the base course makes the contact between the putty layer and the base course not close enough to form an interlayer.
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this kind of product has high bonding strength and water resistance, and is a rigid and alkaline product（ 4) emulsion type putty mainly consists of polymer emulsion, superfine packing and water retaining agent
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3
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Soon after the user moves to a new house, the paint film peeling, blistering, falling off and cracking will appear on the wall, which will destroy the beautiful home built by the user with great efforts
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And can improve the performance and service life of the coating（ 6) When painting the interior wall again, it is not necessary to uproot the wall, but directly brush and apply the interior wall paint（ 7) Water resistant putty is an environment-friendly material, which does not pollute the indoor air
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Can exterior wall putty be used indoors? Will there be environmental problems? Answer: exterior wall putty can be used indoors, but it is better to use interior wall putty indoors
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After moving into furniture, The service life of furniture is also greatly shortened
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It is also made of methyl cellulose and Shuangfei powder
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After the construction of emulsion paint, the paint film turns yellow, loses color or falls off
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1、 Classification and difference of putty 1
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This kind of putty has no adhesion and is not water-resistant（ 2) Water resistant putty paste is mainly composed of high molecular organic matter, lime calcium powder, ultra-fine filler and water retaining agent
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What are the factors causing foaming of water-resistant putty? Answer: (1) the curing period of base course cement is not over, and the alkalinity is too large, resulting in the high alkalinity of putty layer during the curing period, leaving blistering traces after drying（ 2) The base course wall is too dry and the speed of scraping is too fast, which causes the putty layer to press the air and produce air drum
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Why is ordinary putty easy to pulverize? Answer: (1) ordinary putty (such as 821 putty) is mainly made of big white powder, a little starch glue and CMC (hydroxymethyl cellulose)
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After the construction is completed, it will bring many times of maintenance and inconvenience to users（ 5) When painting the wall again, the original 821 putty needs to be removed, which is laborious and pollutes the environment（ 6) The surface is not delicate enough and the texture is poor
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Which document restricts the use of ordinary putty represented by 821? A: in the “Beijing building materials (2007) No
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When and how to use putty during decoration? A: in front of the top of the painted wall, apply putty first, then apply primer, and then apply paint
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In particular, it is difficult to eliminate the above phenomenon even if it is completely closed with cloth
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In this way, users will not only suffer huge economic losses, but also face the embarrassing situation of how to deal with the furniture and other decorative materials already placed in the room
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What causes peeling of water-resistant putty? A: (1) the strength of the base course is too low, powdered or falling off, resulting in hollowing and even peeling of the putty on the surface course
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This kind of putty has excellent water resistance and flexibility, which can be used on various substrates, but the price is high, which is a neutral product
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