200407410 玖、發明說明： 【發明所屬之技術領域】 本發明係關於一種基於聚胺基醯胺之助 黏劑，其包含 丙二醇單苯醚，且亦關於使用這些助黏劑 A (文善PVC塑# 漿的黏著性。 ^ 2修 【先前技術】 塑膠漿被廣泛地用來保護金屬表面不被腐蝕。尤其在 汽車部門，塑膠漿是用來防水、黏結和密封接縫和^點， 以及用來保護外部表面，像是底部和窗臺。 這些應用通常使用基於PVC聚合物或Pvc共聚物的塑 膝水這I塑膠漿疋由已經被分散在非揮發性塑化劑中的 微細聚合物顆粒所組成。在室溫時，聚合物顆粒不溶於液 相中。在較高溫度（膠凝溫度）時，聚合物顆粒會溶於塑 化诏中。在冷卻時，均勻的溶液便硬化，而得到彈性的或 堅硬的塗層。用於將這些塗覆物施用到欲保護之材料上的 主要方法是刷塗、滾塗或噴塗。 塑化聚氯乙烯塗覆組合物之配方（塑膠漿），以及其 製備與應用於 Krekeler / Wick， Kunstst0ff-Handbuch [Plastics Handbook] ( 1 963 年），第]j 卷，第；[部，第 396 ff頁中有廣泛的描述。 以此方式施用的塑膠漿品質之重要標準是其對於所塗 覆材料之黏著性。具相當低黏著性的保護層會增加侵蝕性 流體穿透的危險。例如，水可以在塗層下遷移並腐蝕金屬 200407410 。當保護膜對金屬的黏著性變低 。因此，為增加這脉涂# μ % ^ 文侍越來越有可能 乙烯中加入改善黏著性 蒹《在塑化聚氯 、鱼、黑？丨AA J· "h ^。助黏劑的功用是尊料並 遍遇到的材料表面（例如 疋要對、曰 u ^ ^ ^ 云月日的未處理鋼、鍍鋅金眉 片或披覆錫的金屬片、^ ^辞金屬 著性。 玉屬片專）帶來持久的黏 助二！—些已發展之用請塑膠槳的助黏劑。這此 助黏劑的實例為多胺、環氣 ^ ^ 官能性矽、& ' 、于端的異氰酸酯、有機 吕月匕性我類以及㈣酸或甲基㈣_類。 在大部分的例子中，所 r. 7 斤使用的助黏劑包括含有咪唑咐 (inndaZ〇llne)基的聚胺基 著性，即使其於塑膠浆甲之以相：：樣、、5予基板良好的黏 …… 歸水中之^辰度相當低。這些聚胺基醯胺 疋由自知為聚合脂肪酸與過量 細多70胺，經聚縮合 " 成。術語，聚合脂肪酸包括由具有1 2至22個 ^原子（較佳為18個碳原子）之未飽和、自然生成或合 曰0 偏的脂族酸製備而成的聚合脂肪酸。脂肪酸可能 是以習知方法（例士口 DE 25 〇6 211 A1)聚合。這些助黏 劑於DE 26 54 871 A1和DE 32 01⑽A1中藉由實施例 方式來說明。DE 44 〇〇 5〇9 A1中描述塑膠漿組合物，其 示了傳統基於聚胺基醢胺的助黏劑，將為三元或更高官 此性的脂肪醇類和/或烷醇胺形式的次要助黏劑加入PVC 塑膠農中’以改善其黏著性質，尤其對於以陽離子電泳程 序塗覆之薄板的黏著性。於此說明書的實驗部分，使用甘 油作為次要助點劑。然而，除了主要的聚胺基醯胺助黏劑 200407410 之1卜，必須加入這些此要助黏劑，其加入塑膠漿中的數旦 通常約為！重量％ (佔塑 〜κ中的數里 醯胺之黏度通常报高，因 難：戶斤使用的聚胺基 匕等致難以加入塑膠漿中。 為了降低黏度及因此提 時助黏劑有良好的加工性，5助編塑膠漿中 柊，通常且右^ 為了降低这些助黏劑的價 1 =馬黏度的助黏劑常常與塑化劑一起配製。鈇 ㈣在大部分的情形巾會使pv 著…利的影響。常使用的塑化劑為鄰苯:=的 如鄰苯二甲酸二丁睡、鄰笨二，酸二辛M或鄰=例 壬酯。已被觀察出的一個不利 -甲-夂- 的功效低。如果足夠的可加工性在稀釋助黏劑時 當大量的鄰苯二甲酸類。丨生被⑽，則必須使用相 塑。量的塑化劑對於基板之黏著性有不利的影 :此外’於助黏劑中作為塑化劑的二燒基鄰苯二甲酸類 ^吏助黏劑的黏度隨著時間變大，此可由醋類的裂解及盘 X胺基醯胺/咪哇咐中的自由胺基的反應來解釋。因此过 用性便受到時間的限制，因為在-段時間後 出見不相谷性’最終便產生凝膠化。此外，二炫 =酸醋類型之產物造成的毒性危險近來已經導致二用途 二評。DE69“2 959 T2提出一種製備特定聚醯胺樹 曰勺方法，依據其申請專利範圍第9項，其包含二 苯二甲酸醋、苯甲醇和二異丙基萘作為塑化劑。ep二8 574 A1私述使用基於a)單元不飽和羧酸與乙烯系不飽和 化合物之共聚物以A b)聚胺類的醯胺基胺類、亞胺基胺類 200407410 ”酉曰類來當作助黏劑，同樣地亦使用上述化合物作為塑 化劑。然而’當其於助黏劑中的比例提高時，這些塑化 的使用又會使得塑勝漿對基板的黏著性受到破壞。 【發明内容】 因此本發明之目的在於提供一種添加劑，其 pvc塑膠聚中的助黏劑且與聚胺基醯胺相容，對於稀釋助 黏劑上有良好的功效’且在黏度方面上穩定，且最重 在pvc塑膠漿對於基板的黏著性上有最少的影響。 疋 根據本發明，該目的是以使用不僅包含聚胺基酿胺， 也包含丙二醇單苯基喊（苯氧基丙醇）之助黏劑來達成。在 取決於黏著行為與各別的聚胺基醯胺使用量而定，有利的 苯氧基丙醇使用量可於大範圍中變化。然而，以㈣劑在 個別塑膠漿組成物中從0.5 i 2重量%之經常使用之比例 為基準時’所使用的苯氧基丙醇之數量在各別例子中，當 以助黏劑的總數量為基準時，有利地應為至少丨〇重量％2 至多為60重量％，較佳為25至55重量％，尤其較佳地為 4〇至50重量❶/。。出人意外地，這些化合物（苯氧基丙醇 在PVC塑膝衆對基板的黏著性上沒有不利的影響，即使其 於助黏劑中佔4…0重量%很大的量。預期當助_ 添加劑的量提高時，PVC塑膠漿對基板的黏著性會降低， 因為助黏劑本身的比例變少了。然而，即使當笨1基-户 在助黏劑中的比例為50%，PVC塑膝衆對基板的= ‘ = = 沒有’或至少幾乎沒有受到任何影響。助黏劑的黏度很低 200407410 ’且就黏度觀點而言’助黏劑是穩定的。 本發明因此提供一種Pvc塑膠 在於其不僅包含聚胺基醯胺，也包含的助黏劑，其特徵 助黏劑之總量下’助黏劑中所存在的苯醇，在基於 至幻〇重量％且至多60重量％，較乳基丙酵之數量為 尤其較佳地為40至50重量％。 ‘、、、至55重量％ ’ 法，it二:提供一種生產用於材料之塗料與黏著劑之方 八係猎由鉍加分別基於微粒 之塑膠浆，該塑«包含傳統的填婦共聚物 及助黏劑’其特徵在於其使：塑化劑以 含值來月女基醯胺，也包 ::乳基丙酵的助黏劑，在以助黏劑之總量為 『基丙醇之數量為至少】。重量%及至多 25至55重量％;尤其較佳地為4〇至5〇重量卜孝乂佳為 基於塑膠锻之重量，所添加之助黏劑之比例為〇·3至 重篁％，較佳為0.5至2重量％，尤其較佳地為1重量％。 此混合物被均質化’且由此製備之塑膠漿於材料上經大於 或90°C的加熱處理，較佳為12〇至16(rc。 "本發明亦提供於材料上形成塗層之塑膠漿，其包含微 粒聚氯乙烯或氯乙烯共聚物、傳統的塑化劑、填充料、添 加劑以及助黏劑，其特徵在於其包含本發明之助黏劑。 【實施方式】 3L施例 之聚胺基醯胺助 在以下實施例2至5中，將實施例 ¢00407410 黏劑EUretek 563於攪拌下進行加熱至約ι〇(Γ(：，並加入 適當添加劑，然後將此混合物均質化。 實施例1 (比較例）··200407410 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a polyamidoamine-based adhesion promoter, which includes propylene glycol monophenyl ether, and also relates to the use of these adhesion promoters A (Wenshan PVC Plastic # Adhesiveness of paste. ^ 2 repair [prior art] Plastic paste is widely used to protect metal surfaces from corrosion. Especially in the automotive sector, plastic paste is used to waterproof, bond and seal joints and points, and to To protect exterior surfaces, such as bottoms and windowsills. These applications typically use plastic knee water based on PVC polymer or PVC copolymer. This plastic slurry is made of fine polymer particles that have been dispersed in a non-volatile plasticizer. Composition. At room temperature, the polymer particles are insoluble in the liquid phase. At higher temperatures (gelling temperature), the polymer particles will dissolve in the plasticized concrete. Upon cooling, the homogeneous solution will harden to obtain Elastic or hard coatings. The main methods used to apply these coatings to the material to be protected are brushing, rolling or spraying. Formulations (plastic paste) for plasticizing polyvinyl chloride coating compositions, And its preparation and application Krekeler / Wick, Kunstst0ff-Handbuch [Plastics Handbook] (1963), Vol.], Vol.j, No .; [Part, p.396ff] are widely described. Plastic pastes applied in this way An important criterion of quality is its adhesion to the material being coated. A protective layer with a relatively low adhesion increases the risk of aggressive fluid penetration. For example, water can migrate under the coating and corrode the metal 200407410. When the protective film The adhesion to metal becomes lower. Therefore, in order to increase this vein coating # μ% ^ It is increasingly possible for Wenshu to add ethylene to improve the adhesion 蒹 "In plasticized polyvinyl chloride, fish, black? 丨 AA J · " h ^. The function of the adhesion promoter is to respect the material and encounter the surface of the material (for example, you want to say, u ^ ^ ^ Yun Yueri untreated steel, galvanized gold eyebrows or tin-coated metal sheets, ^ ^ Quoting metal. Special for jade tablets) Brings lasting adhesion! 2—Some adhesion promoters that have been developed with plastic paddles. Examples of this adhesion promoter are polyamines and ring gas. ^ Functional Silicone, & ', isocyanate at the end, organic Luyue and other properties Acids or methyl hydrazones. In most cases, the adhesion promoter used by R. 7 kg includes a polyamine-based adhesive containing an imidazoline group, even if it is used in plastic paste. Phase :: sample, 5, good adhesion to the substrate ... The degree of return to water is quite low. These polyamines are made of polymerized fatty acids and an excess of 70 amines, which are polycondensed ". In the term, the polymerized fatty acid includes a polymerized fatty acid prepared from an unsaturated, naturally-occurring, or unsymmetrical aliphatic acid having 12 to 22 carbon atoms (preferably 18 carbon atoms). Fatty acids may be polymerized in a conventional manner (eg, DE 25 0 6 211 A1). These adhesion promoters are described by way of example in DE 26 54 871 A1 and DE 32 01⑽A1. DE 44 0050 09 A1 describes a plastic paste composition, which shows a traditional polyamine-based adhesion promoter, which will be in the form of a ternary or higher fatty alcohol and / or alkanolamine The secondary adhesion promoter is added to PVC plastic farmers to improve its adhesion properties, especially for the adhesion of thin plates coated by cationic electrophoresis procedures. In the experimental part of this description, glycerin is used as a secondary aid. However, in addition to the main polyamidoamine adhesion promoter 200407410-1, these must be added, the number of deniers added to the plastic slurry is usually about! (% By weight) The viscosity of amidine in plastic is usually high, due to the difficulty: it is difficult to add it to the plastic slurry due to the use of polyamine daggers etc. In order to reduce the viscosity and thus improve the adhesion promoter, it is good. In order to reduce the value of these adhesion promoters, 1 = horse viscosity is often formulated with plasticizers. 鈇 ㈣ In most cases, the towel will make The influence of pv is beneficial. The commonly used plasticizers are phthalate: = such as dibutyl phthalate, o-diphenyl, acid dioctyl M or o-nonyl ester. A disadvantage that has been observed -A- 夂-is low in efficacy. If sufficient processability is used when diluting the adhesion promoter, a large amount of phthalic acids are used. Phase plasticity must be used. Phase plasticizers must be used for substrate adhesion. It has a negative effect on the properties: In addition, it is used as a plasticizer for the dialkyl phthalic acid in the adhesion promoter. The viscosity of the adhesion promoter increases with time. This can be caused by the cracking of the vinegar and the amine group. The reaction of free amine groups in amidine / midazolam is explained. Therefore, overuse is limited by time, because- After a long time, it will be seen that the inanimate nature will eventually cause gelation. In addition, the toxicity hazard caused by the products of the dioxane = acid and vinegar type has recently led to the second evaluation of two uses. The tree spoon method, according to item 9 of its patent application scope, contains diphthalate, benzyl alcohol and diisopropylnaphthalene as plasticizers. Ep 2 8 574 A1 privately uses a unit of unsaturated carboxylic acid The copolymer of an acid and an ethylenically unsaturated compound uses A b) polyamines such as amidoamines and iminoamines 200407410 as the adhesion promoter, and the same compounds are also used as plasticizers. Agent. However, when its proportion in the adhesion promoter is increased, the use of these plasticizations will cause the adhesiveness of the plastic paste to be damaged. [Summary of the Invention] Therefore, the object of the present invention is to provide an additive whose adhesion promoter in pvc plastic is compatible with polyamidoamine, has good effect on diluting adhesion promoter 'and is stable in viscosity. The most important thing is that the PVC plastic paste has the least influence on the adhesion of the substrate.疋 According to the present invention, this object is achieved by using an adhesion promoter that contains not only polyamines but also propylene glycol monophenyl (phenoxypropanol). Depending on the adhesive behavior and the respective amount of polyamidoamine used, the beneficial use of phenoxypropanol can vary over a wide range. However, the amount of phenoxypropanol used is based on the ratio of elixirs in individual plastic paste compositions from 0.5 to 2% by weight, which is often used. In each case, the total number of adhesion promoters is When the amount is based, it should advantageously be at least 10% by weight, 2 at most 60% by weight, preferably 25 to 55% by weight, particularly preferably 40 to 50% by weight. . Surprisingly, these compounds (phenoxypropanol) have no adverse effect on the adhesion of PVC to plastic substrates, even if they account for a large amount of 4 ... 0% by weight in the adhesion promoter. It is expected to help _ When the amount of additives is increased, the adhesion of PVC plastic paste to the substrate will be reduced, because the proportion of the adhesion promoter itself will be reduced. However, even when the proportion of stupid-based households in the adhesion promoter is 50%, PVC Plastic knees = '= = no' or at least hardly affected at all. The viscosity of the adhesion promoter is very low 200407410 'and from the viewpoint of viscosity, the adhesion promoter is stable. The present invention therefore provides a PVC plastic The reason is that it contains not only polyamidoamine, but also an adhesion promoter, which is characterized by the total amount of the adhesion promoter. The phenyl alcohol present in the adhesion promoter is based on up to 0% by weight and up to 60% by weight, The amount of milk-based propionate is particularly preferably 40 to 50% by weight. ',,, to 55% by weight' method, it 2: It is to provide a method for producing coatings and adhesives for materials. Bismuth plus plastic paste based on particles, which contains traditional fillers Women's copolymers and adhesion promoters' are characterized in that they make: plasticizers contain hydrazine, and also include :: milk-based propionate adhesion promoters. The total amount of adhesion promoters is " The amount of propylpropanol is at least].% By weight and up to 25 to 55% by weight; particularly preferably 40 to 50% by weight. Pu Xiaoyujia is based on the weight of plastic forging, and the proportion of the adhesion promoter added is 0 · 3 to 篁% by weight, preferably 0.5 to 2% by weight, particularly preferably 1% by weight. This mixture is homogenized 'and the plastic slurry prepared therefrom is heat-treated on the material at a temperature greater than or 90 ° C, It is preferably 120 to 16 (rc.) The present invention also provides a plastic slurry for forming a coating on a material, which contains particulate polyvinyl chloride or a vinyl chloride copolymer, a conventional plasticizer, a filler, an additive, and an auxiliary agent. Adhesive, which is characterized in that it contains the adhesion promoter of the present invention. [Embodiment] In the following Examples 2 to 5, the polyurethane amine of Example 00407410, the adhesive EUretek 563, is stirred. Heating was performed to about ΙΟ (Γ (:), and appropriate additives were added, and then the mixture was homogenized. · Example 1 (Comparative Example)
Euretek® 563 (Vantico AG公司製造之基於聚胺基醯 胺之商業助黏劑）。 實施例2 (比較例）·· 60%的Euretek 563，40%的鄰苯二曱酸二辛酯。 實施例3 60%的Euretek 563，40%的苯氧基丙醇。 實施例4 50%的Euretek 563，50%的苯氧基丙醇 實施例5 (比較例）： 80%的 Euretek 563，20%的甘油。 塑膠漿的製備： 之上述實施例1至5之 劑，此塑膠漿由下述組Euretek® 563 (Polyamine based commercial adhesion promoter manufactured by Vantico AG). Example 2 (comparative example) ... 60% of Euretek 563, 40% of dioctyl phthalate. Example 3 60% Euretek 563, 40% phenoxypropanol. Example 4 50% Euretek 563, 50% phenoxypropanol Example 5 (comparative example): 80% Euretek 563, 20% glycerol. Preparation of plastic paste: The agent of Examples 1 to 5 above, this plastic paste is composed of the following group
將1% (以全部混合物為基準） 聚胺基醯胺加入塑膠漿中作為助黏 成：35%鄰苯二甲酸二異壬酯；25%pvc漿料（如 347 MB) ; 16.0%經塗覆白堊（s〇cap 312) ; 16·5%天然白堊 (Juraperle) ; 2. 0% Ca0 ; 〇· 2% Ζη〇 以及 4. 3% Exxs〇p 8〇 當然，在上述配方以外，助黏劑亦可加入傳統的塑膠 漿配方中以獲得本發明之自黏性塑膠漿。 使用本㈣之塑膠漿可達成之黏著性是以工來決定 。因此，使用BASF公司生產之Cath〇guard 4〇〇 CEC薄板 11 200407410 。黏附的尺寸為25 x 1〇〇 _。 方法： 使用抹刀將寬為約1 5 膠漿長條’施用在CEC _ 為約5 之pvc塑 得_ ! 片上，再將塑膠漿塗敷展開以 見反 i.bcm 日 /fi# ί r» ^ α ^ 又· 5 _的測試長條片。將此測試 樣〇口置於溫控的乾燥箱 熱處理之後，將… °。力熱處理30分鐘。加 以樣品移出乾燥箱。冷卻後（至少經2 J、日守），進行黏著性測 # 、忒。為此，用刀片在測試長條片兩 邊切出寬度約為〇 5 Δ“ l ^ Η ΑΑ · cm的切口。然後以手動測試測試長 保片的可剝離性。 以下列分類系統進行評估： 毫無黏著性Add 1% (based on the entire mixture) of polyamidoamine to plastic paste as adhesion promoter: 35% diisononyl phthalate; 25% pvc slurry (such as 347 MB); 16.0% after coating Covered with chalk (s〇cap 312); 16.5% natural chalk (Juraperle); 2.0% Ca0; 0.2% Zη〇 and 4.3% Exxs〇p 8〇 Of course, in addition to the above formula, adhesion promotion Agents can also be added to traditional plastic slurry formulations to obtain the self-adhesive plastic slurry of the present invention. The adhesiveness that can be achieved using the plastic paste of this tincture is determined by work. Therefore, Cathoguard 400 CEC sheet 11 200407410 produced by BASF was used. The size of the adhesion is 25 x 100 mm. Method: Use a spatula to apply a strip of glue with a width of about 15 to a plastic sheet with a CEC _ of about 5 to make a plastic sheet! Then, spread the plastic slurry to see the reverse i.bcm 日 / fi # ί r »^ Α ^ and · 5 _ test strips. Place the test sample port 0 in a temperature-controlled drying box. After heat treatment, ... °. Force heat treatment for 30 minutes. Add sample and remove from oven. After cooling (at least 2 J, day guard), perform the adhesion test #, 忒. For this purpose, a cut with a width of about 0 Δ "l ^ Η ΑΑ · cm was cut out on both sides of the test strip with a razor blade. Then the peelability of the long sheet was tested by manual test. The following classification system was used for evaluation: None Adhesion
長條片可被輕易剝離；少量塑膠漿膜殘留在 CEC層上 ," '' ' ~ —------------—-_ 很難將長條片剝離；少量塑膠漿膜殘留在CEC 層上 很難將長條片剝離且剝離時會破碎；明顯的塑 層上 + + 剝離 量測結果列於下表 12 200407410 表1 ： 實施例 於25°C之黏 度[mPa · s] 於75°C之黏 度[mPa · s] 手動黏 著性 儲存30天/50 °C後於75°C之 黏度[mPa · s] 1儲存;30天/5〇 °〇後之外觀 1 n.m*) 16500 ++ 16600 清晰的 2 22300 1300 + 6000 +清晰的/不 相容的 3 16200 810 ++ 815 清晰的 4 11900 500 ++~ 505 清晰的 5 n.m*) 12000 0^* 12600 於25°C未測量（黏度太高） 黏度係使用VT 55 0 Haake旋轉黏度計，依照製造公司 的操作指南測量。 說明 由上 低黏度， 黏劑可穩 長的彳諸存 使用具有 丙醇含量 良好的塑 是比較例 降低的黏 對基板的 表可知，本叙明之助黏劑（實施例3和4)具有 因此較容易處理。與比較例2相&，本發明之助 定儲存，即使在相當高溫儲存之後，％因此於延 時間之後’其仍可為使用者使用。出人意外地， 4〇%U施例3)且甚至是5Q%(實施例4)之苯氧基 (、、〜里為基準）的本發明助黏劑，可得 膠聚對基板的黏著性。使用來自比㈣"，尤其 菩助得到當稀釋增加時有時會產生顯著 $氧基丙知用於助黏劑時，預期塑膠漿 '者亦會隨者笨氧基丙醇比例的增加而下降。 13 200407410 出人意外地，即使助黏劑中含有50%的苯氧基丙醇時，其 黏著性並未降低，且仍維持在良好狀態。此結果並非可預 見的。The long strip can be easily peeled off; a small amount of plastic slurry film remains on the CEC layer, " '' '~ -----------------_ It is difficult to peel off the long strip; a small amount of plastic slurry film Residual on the CEC layer, it is difficult to peel off the long sheet and it will break when peeled off; the peeling measurement results on the obvious plastic layer are listed in the following table 12 200407410 Table 1: Viscosity of the Example at 25 ° C [mPa · s ] Viscosity at 75 ° C [mPa · s] Adhesive storage by hand for 30 days / 50 ° C Viscosity at 75 ° C [mPa · s] 1 Storage; Appearance after 30 days / 50 °° 1 nm * ) 16500 ++ 16600 clear 2 22300 1300 + 6000 + clear / incompatible 3 16200 810 ++ 815 clear 4 11900 500 ++ ~ 505 clear 5 nm *) 12000 0 ^ * 12600 at 25 ° C Not measured (too high viscosity) Viscosity was measured using a VT 55 0 Haake Rotary Viscometer in accordance with the manufacturing company's operating instructions. It can be seen from the table that the viscosity is low and the adhesive can be stable for a long time. The use of a plastic having a good propanol content is a comparative example of a reduced adhesion to the substrate table. It can be seen that the adhesion promoter (Examples 3 and 4) described herein has Easier to handle. In contrast to & Comparative Example 2, the assisted storage of the present invention, even after storage at a relatively high temperature, is therefore still available for the user after a delay. Surprisingly, 40% U of Example 3) and even 5Q% (Example 4) of the phenoxy (,, ~ ~ as the reference) of the present adhesion promoter can obtain the adhesion of the glue to the substrate Sex. The use of derivation from Pycnogenol®, especially when botanic acid is obtained, sometimes produces a significant amount of $ oxypropion when it is diluted. When used for adhesion promoters, it is expected that the plastic paste will also decrease with the increase in the proportion of styloxypropanol. . 13 200407410 Surprisingly, even when the adhesion promoter contains 50% of phenoxypropanol, its adhesion is not reduced and it remains in good condition. This result is not predictable.
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