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51. 发明授权

US06280648B1 Stain resistant composition for polyamide containing substrates 失效
标题翻译：用于含聚酰胺的基材的耐污染组合物
公开(公告)号：US06280648B1
公开(公告)日：2001-08-28
申请号：US09176072
申请日：1998-10-20
申请人： Jim Konzelman , David A. MacEwen , Robert B. Login
发明人： Jim Konzelman , David A. MacEwen , Robert B. Login
IPC分类号： D06M900
CPC分类号： D06M11/13 , D06M15/195 , D06M15/233 , D06M15/263 , D06M15/412 , D06M2101/34 , D06M2200/25
摘要： A stain blocking composition for treating polyamide materials, such as nylon carpeting is disclosed. The stain blocking composition contains one or more novolak resins in combination with an addition polymer and a metal donor, such as a magnesium salt. The addition polymer is directed to a partially sulfonated styrene-maleic copolymer. The addition polymer not only serves as a stain blocking composition but also serves to reduce the yellowing effect sulfonated novolak resins may have on polyamide substrates. Besides containing a sulfonated novolak resin and the addition polymer, the composition of the present invention can include various other ingredients. For instance, the composition can contain an emulsifier or dispersant, antioxidants such as sodium thiocyanate or fluorocarbon repellents or mixtures thereof.
摘要翻译：公开了一种用于处理诸如尼龙地毯的聚酰胺材料的防污组合物。防污组合物含有一种或多种与加成聚合物和金属给体如镁盐组合的酚醛清漆树脂。加成聚合物被引导至部分磺化的苯乙烯 - 马来共聚物。加成聚合物不仅用作防污组合物，而且还用于减少磺化酚醛清漆树脂在聚酰胺基材上可能发生的黄变效应。除了含有磺化酚醛清漆树脂和加成聚合物外，本发明的组合物可以包括各种其它成分。例如，组合物可以含有乳化剂或分散剂，抗氧化剂如硫氰酸钠或氟碳驱避剂或其混合物。

52. 发明申请

US20010007891A1 Self-crosslinking aqueous polystyrene-butadiene dispersions for consolidating bituminizable nonwovens and also consolidated nonwovens 审中-公开
标题翻译：自交联水性聚苯乙烯 - 丁二烯分散体，用于固化可沥青的无纺布和固结的无纺布
公开(公告)号：US20010007891A1
公开(公告)日：2001-07-12
申请号：US09753560
申请日：2001-01-04
申请人： Polymerlatex GmbH & Co. KG.
发明人： Gunther Mueller , Helmut Daum , Willibald Scheda
IPC分类号： C08L033/00 , C08L035/00
CPC分类号： D04H1/64 , C08L25/10 , C08L53/02 , C08L95/00 , D04H1/4218 , D04H1/4266 , D04H1/4334 , D04H1/435 , D04H1/587 , D04H1/645 , D04H1/68 , D04H3/011 , D04H3/12 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/29 , D06N5/00 , C08L25/00 , C08L53/00
摘要： Self-crosslinking aqueous polymer dispersions which are suitable for consolidating nonwovens, which may be subsequently bituminized.
摘要翻译：自交联水性聚合物分散体，其适用于固化无纺布，其可随后被沥青。

53. 发明授权

US06238792B1 Fluorine-containing maleic acid terpolymer soil and stain resists 失效
标题翻译：含氟马来酸三元共混物防污染
公开(公告)号：US06238792B1
公开(公告)日：2001-05-29
申请号：US09337375
申请日：1999-06-21
申请人： Engelbert Pechhold , Peter Michael Murphy
发明人： Engelbert Pechhold , Peter Michael Murphy
IPC分类号： B32B2700
CPC分类号： D06M15/227 , C08F8/44 , C08F220/22 , C08F222/02 , C08F2810/50 , D06M15/233 , D06M15/263 , D06M15/295 , D06M15/347 , D06M15/353 , D06M15/3566 , Y10T428/23993 , Y10T428/2933 , Y10T428/2938 , Y10T428/2964 , Y10T428/2967 , Y10T428/2969 , Y10T442/2279 , C08F8/12 , C08F222/08 , C08F212/08 , C08F216/1408 , C08F216/18 , C08F222/06 , C08F210/14 , C08F226/02 , C08F214/182
摘要： A terpolymer having units of Formula I wherein X is a C2-10 alkyl, C6-12 aryl, or C4-12 alkoxy radical, d is from about 3 to about 50, R is a fluoroalkyl radical Rf—(A)v—(B)w—, Rf is a fully fluorinated straight or branched aliphatic radical optionally interrupted by at least one oxygen atom, A is a divalent radical selected from —SO2N(R″)—, —CON(R″)—, —S—, or —SO2—, where R″ is H, or a C1-6 alkyl radical, B is a divalent linear hydrocarbon radical —CtH2t—, where t is 1 to 12, Y is a divalent radical —CH2—O—, u, v, and w are each independently zero or 1, R′ is hydrogen or methyl, e is from about 0.05 to about 10, M is hydrogen, alkali metal, or ammonium, and f is from about 5 to about 40, and its use to provide soil resistance and resistance to staining by acid dyes for fiber substrates is disclosed.
摘要翻译：具有式I其中X为单元的三元共聚物为C 2-10烷基，C 6-12芳基或C 4-12烷氧基，d为约3至约50，R为氟烷基，Rf-（A）v-（B）任选地被至少一个氧原子中断的完全氟化的直链或支链脂族基团，A是选自-SO 2 N（R“'） - ， - CON（R”'） - ， - S- ，或-SO 2 - ，其中R“为H，或C 1-6烷基，B为二价线性烃基-CtH 2 t-，其中t为1至12，Y为二价基团-CH 2 -O-， u，v和w各自独立地为0或1，R'为氢或甲基，e为约0.05至约10，M为氢，碱金属或铵，f为约5至约40，其公开了用于提供耐污染性和耐酸性染料对纤维基材的抗污染性的用途。

54. 发明授权

US6126849A Aqueous dispersion-type fluorinated water- and oil-repellent 失效
标题翻译：水分散型氟化防水防油剂
公开(公告)号：US6126849A
公开(公告)日：2000-10-03
申请号：US202095
申请日：1998-12-09
申请人： Masayuki Yamana , Norimasa Uesugi , Eiji Ogura
发明人： Masayuki Yamana , Norimasa Uesugi , Eiji Ogura
IPC分类号： B01F17/00 , B01F17/18 , C08F220/22 , C08J3/03 , C08L27/06 , C09D133/04 , C09D133/16 , C09K3/18 , D06M13/02 , D06M13/184 , D06M13/203 , D06M13/248 , D06M13/252 , D06M13/322 , D06M13/402 , D06M13/41 , D06M13/412 , D06M13/46 , D06M13/463 , D06M15/233 , D06M15/248 , D06M15/256 , D06M15/263 , D06M15/277 , D06M9/00 , B05D3/02
CPC分类号： C08J3/03 , B01F17/005 , C08F220/22 , C09K3/18 , D06M13/463 , D06M15/233 , D06M15/248 , D06M15/256 , D06M15/263 , D06M15/277 , C08J2327/12
摘要： An aqueous dispersion-type fluorine-containing water- and oil-repellent wherein (A) a fluorine-containing copolymer of (A-1) a monomer having a polyfluoroalkyl group and (A-2) a monomer copolymerizable therewith is dispersed in the presence of (B) a emulsifier containing a fluorine-containing cationic surfactant, is excellent in fastness to rubbing.
摘要翻译： PCT No.PCT / JP97 / 01894 Sec。 371 1998年12月9日第 102（e）日期1998年12月9日PCT提交1997年6月4日PCT公布。公开号WO97 / 48780 日期：1997年12月24日一种水分散型含氟防水疏水剂，其中（A）（A-1）含有多氟烷基的单体和（A-2）可共聚合单体的含氟共聚物在（B）含有含氟阳离子表面活性剂的乳化剂存在下分散，耐摩擦牢度优异。

55. 发明授权

US6117960A Water-soluble cross-linkable copolymers 失效
标题翻译：水溶性交联共聚物
公开(公告)号：US6117960A
公开(公告)日：2000-09-12
申请号：US142399
申请日：1998-09-04
申请人： Klaus Kohlhammer , Gerhard Koegler , Peter Ball , Monika Rockinger , Walter Dobler
发明人： Klaus Kohlhammer , Gerhard Koegler , Peter Ball , Monika Rockinger , Walter Dobler
IPC分类号： C08F2/10 , C08F2/20 , C08F2/22 , C08F20/36 , C08F212/08 , C08F212/14 , C08F220/36 , C08F220/38 , C08F220/58 , C08F228/02 , C08J3/12 , C08L33/26 , C09D7/45 , C09D125/18 , C09D133/14 , C09D133/24 , C09D141/00 , C09J133/14 , C09J133/26 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/29 , D06M15/327 , D06M15/333 , D06M15/356 , D06N3/04 , D21H17/34 , D21H17/37 , D21H17/41 , D21H19/20 , C08L39/00 , C08L41/00
CPC分类号： D21H17/37 , C08F220/38 , C08F220/58 , C08J3/122 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/29 , D06M15/327 , D06M15/333 , D06M15/3566 , D06M7/00 , D06M2200/40
摘要： The invention concerns water-soluble cross-linkable copolymers having a molecular weight of .ltoreq.500000 and comprising a) between 20 and 95 wt. % sulphonic-acid- or sulphonate-group-containing monomer units; b) between 4 and 80 wt. % N-methylol- or N-alkoxymethyl-group containing monomer units; and c) between 0.1 and 20 wt. % hydrophobic monomer units selected from the group comprising water-insoluble ethylenically unsaturated compounds and hydrophobic end groups of initiator radicals or regulator molecules, the portions in wt. % being relative to the total weight of the copolymer. The portion of sulphonic-acid- or sulphonate-group-containing monomer units can optionally be substituted by up to 50 wt. %, relative to the portion by weight of monomer units a), by carboxyl-group-containing monomer units d) or amide-group-containing monomer units e).
摘要翻译： PCT No.PCT / EP97 / 01137 Sec。 371日期：1998年9月4日 102（e）1998年9月4日PCT 1997年3月6日PCT公布。出版物WO97 / 32911 日期1997年9月12日本发明涉及分子量为500000的水溶性可交联共聚物，其包含a）20至95重量％含磺酸基或磺酸基的单体单元; b）4至80wt。％的N-羟甲基或N-烷氧基甲基的单体单元; 和c）0.1-20wt。选自包含不溶于水的烯键式不饱和化合物和引发剂基团或调节剂分子的疏水端基的疏水性单体单元％。％相对于共聚物的总重量。含磺酸或磺酸基的单体单元的部分可以任选地被至多50wt。％，相对于单体单元a）的重量份，含羧基的单体单元d）或含酰胺基的单体单元e）。

56. 发明授权

US5645926A Fire and heat resistant materials 失效
标题翻译：耐火和耐热材料
公开(公告)号：US5645926A
公开(公告)日：1997-07-08
申请号：US307646
申请日：1995-02-03
申请人： Arthur Richard Horrocks , Subhash Chander Anand , Barry Jakeman Hill
发明人： Arthur Richard Horrocks , Subhash Chander Anand , Barry Jakeman Hill
IPC分类号： A41D31/00 , A62C8/06 , B32B3/26 , B32B5/26 , B60K15/03 , D04H1/4266 , D04H1/4342 , D04H1/46 , D06M11/72 , D06M11/79 , D06M13/02 , D06M13/148 , D06M13/244 , D06M13/282 , D06M13/292 , D06M15/00 , D06M15/233 , D06M15/263 , D06M23/06 , D06M23/08 , D06M101/00 , D06M101/02 , D06M101/06 , D06M101/08 , D06M101/10 , D06M101/16 , D06M101/30 , D06M101/34 , D06M101/36 , D06M101/40 , E04B1/76 , D04H1/42
CPC分类号： D04H1/4266 , A41D31/0022 , A62C8/06 , B32B5/26 , D04H1/4342 , D04H1/46 , D06M11/72 , D06M11/79 , D06M15/233 , D06M15/263 , D06M23/06 , D06M23/08 , D10B2331/021 , E04B2001/7691 , Y10S428/92 , Y10S428/921 , Y10T442/3431 , Y10T442/3504 , Y10T442/3618 , Y10T442/3707 , Y10T442/475 , Y10T442/488 , Y10T442/655 , Y10T442/664
摘要： A flexible fire and heat resistant material comprising an intimate mixture of organic intumescent filler and organic fibres adapted to char intensely within the temperature range of 200.degree. C. to 500.degree. C. The added presence of inorganic fibre components enhances the structural integrity of this structure both during char formation up to 500.degree. C. and at higher temperatures up to 1200.degree. C. once char oxidation takes place.
摘要翻译： PCT No.PCT / GB93 / 00567 Sec。 371日期：1995年2月3日 102（e）1995年2月3日PCT PCT 1993年3月19日PCT公布。出版物WO93 / 日期1993年9月30日一种柔性防火耐热材料，包括有机膨胀填料和有机纤维的紧密混合物，适于在200℃至500℃的温度范围内强烈地烧焦。无机纤维组分的添加增加了一旦发生焦炭氧化，该结构的结构完整性在焦化形成达500℃和高达1200℃的较高温度下均可。

57. 发明授权

US5607490A Filter having chemical resistance, antistatic property and water vapor resistance, and process for producing the same 失效
标题翻译：具有耐化学性，抗静电性和耐水蒸汽性的过滤器及其制造方法
公开(公告)号：US5607490A
公开(公告)日：1997-03-04
申请号：US413107
申请日：1995-03-29
申请人： Seihou Taniguchi , Takeshi Hazeyama , Hitoshi Otaka
发明人： Seihou Taniguchi , Takeshi Hazeyama , Hitoshi Otaka
IPC分类号： B01D39/00 , B01D39/14 , B01D39/16 , B01D39/20 , B01D46/50 , B32B27/34 , C08G73/10 , C09D127/12 , D01F6/74 , D06M11/74 , D06M11/83 , D06M15/227 , D06M15/233 , D06M15/256 , D06M15/353 , D06M23/08 , D06M23/10 , D06N3/00 , D06N3/04 , B01D29/01
CPC分类号： B01D39/1623 , D01F6/74 , D04H1/46 , D06M11/74 , D06M11/83 , D06M15/227 , D06M15/233 , D06M15/256 , D06M15/353 , D06M23/08 , D06M23/10 , D06N3/0056 , D06N3/045 , D06N3/047 , B01D2239/0241 , B01D2239/0478 , B01D2239/10 , Y10S55/05 , Y10T442/2213
摘要： A water vapor resistant filter comprising a permeable molded material, nonwoven fabric or felt comprising polyimide fiber having a repeating unit represented by formula (I) is described. The permeable molded material, nonwoven fabric or felt is covered with a condensed polycyclic polynucleus aromatic resin, a melting fluorine resin, a solvent-soluble cold setting fluorine resin or a fluorine elastomer: ##STR1## X, R and n are defined in the specification. A water vapor resistant antistatic filter is also described, which comprises a permeable molded material, nonwoven fabric or felt comprising polyimide fiber having a repeating unit represented by the above-described formula (I). The permeable molded material, nonwoven fabric or felt is covered with an electroconductive material and a condensed polycyclic polynucleus aromatic resin, a solvent-soluble cold setting fluorine resin or a fluorine elastomer. Processes for producing these filters are also described.
摘要翻译：描述了一种包含渗透模制材料的防水蒸气过滤器，包含具有由式（I）表示的重复单元的聚酰亚胺纤维的非织造织物或毛毡。可渗透的成型材料，非织造织物或毛毡被冷凝的多环多核芳香树脂，熔融氟树脂，溶剂可溶的冷固氟树脂或氟弹性体覆盖。定义X，R和n 在规范中。还描述了一种防水蒸汽抗静电过滤器，其包括可渗透模制材料，非织造织物或毛毡，其包含具有由上述式（I）表示的重复单元的聚酰亚胺纤维。可渗透成型材料，无纺布或毛毡被导电材料和缩合多环多核芳香树脂，溶剂可溶性冷固氟树脂或氟弹性体覆盖。还描述了用于生产这些过滤器的方法。

58. 发明授权

US5523345A Latex binder compositions 失效
标题翻译：乳胶粘合剂组合物
公开(公告)号：US5523345A
公开(公告)日：1996-06-04
申请号：US201824
申请日：1994-02-25
申请人： David F. Diehl , Peter C. Hayes
发明人： David F. Diehl , Peter C. Hayes
IPC分类号： C08F212/06 , C08F220/54 , C08F236/10 , D04H1/64 , D06M13/256 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/29 , H01L21/02 , C08L39/00
CPC分类号： H01L28/92 , C08F212/06 , C08F220/54 , C08F236/10 , D04H1/587 , D04H1/64 , D06M13/256 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/29 , Y10T428/3188
摘要： A latex binder composition which is the reaction product of a conjugated diene monomer and a vinyl-substituted aromatic monomer along with minor amounts of other comonomers including acrylamide or a derivative thereof, methacrylic acid, N-methylolacrylamide, and optional unsaturated carboxylic acids, has an average particle size of less than 1,500 .ANG.. The latex binder which has good stability can be used on nonwoven cellulosic based substrates to impart high wet tensile strength thereto.
摘要翻译：作为共轭二烯单体和乙烯基取代的芳族单体与少量其它共聚单体（包括丙烯酰胺或其衍生物，甲基丙烯酸，N-羟甲基丙烯酰胺和任选的不饱和羧酸）的反应产物的胶乳粘合剂组合物具有平均粒径小于1500安格。具有良好稳定性的胶乳粘合剂可以用于非织造纤维素基材料上以赋予其高的湿拉伸强度。

59. 发明授权

US5494963A Low formaldehyde, high gel fraction latex binder 失效
$Low formaldehyde, high gel fraction latex binder$
标题翻译：低甲醛，高凝胶分数乳胶粘合剂
公开(公告)号：US5494963A
公开(公告)日：1996-02-27
申请号：US368526
申请日：1995-01-04
申请人： Peter C. Hayes
发明人： Peter C. Hayes
IPC分类号： C08L9/08 , C08F212/14 , C08F236/04 , C08F236/10 , C08L21/02 , C08L25/10 , C09D125/10 , C09J125/10 , D04H1/64 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/693 , D21H19/20 , D21H19/24 , D21H19/58 , C08L33/00
CPC分类号： C08F212/14 , C08F236/10 , C08L25/10 , C09D125/10 , C09J125/10 , D04H1/587 , D04H1/64 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/693 , D21H19/58 , Y10T428/31895 , Y10T428/31982
摘要： A low formaldehyde high gel fraction latex binder is made utilizing a compound having the formula ##STR1## wherein R and R', independently, is an alkyl having from 1 to 10 carbon atoms, and R.sup.4 is hydrogen, or wherein R.sup.3 and R.sup.4, independently is an alkyl, an aromatic, or combinations thereof having from 1 to 10 carbon atoms, or wherein said R.sup.3 and R.sup.4 are connected to form an internal amide, and wherein the isopropenyl group is either in the ortho, meta or para position. The latex binder is generally an emulsion or latex copolymer made from various monomers including at least one or more conjugated dienes having a total of from 4 to 10 carbon atoms with butadiene being preferred and from one or more vinyl-substituted aromatics having from 8 to 14 carbon atoms, with styrene being preferred. The amount of the above formulation compounds is generally from about 0.25 to about 20 parts by weight based upon 100 parts by weight of the one or more conjugated dienes and the vinyl-substituted aromatic monomers. The latex binder has good stability, and has many applications such as to bind a paper-coating composition to a cellulose substrate, or to bind non-woven fibers together. The latex binder generally contains 10 parts or less by weight of formaldehyde per million parts by weight and desirably contains nil, that is, no detectable amounts of formaldehyde therein, even after extended periods of time, e.g., 28 days.
摘要翻译：使用具有下式的化合物制备低甲醛高凝胶分数乳胶粘合剂：其中R和R'独立地是具有1至10个碳原子的烷基，R 4是氢，或其中R 3 和R 4独立地是具有1至10个碳原子的烷基，芳族或其组合，或其中所述R 3和R 4连接形成内酰胺，并且其中所述异丙烯基在邻位，间位或对位位置。胶乳粘合剂通常是由各种单体制成的乳液或胶乳共聚物，包括至少一种或多种总共4至10个碳原子的共轭二烯，其中丁二烯是优选的，并且一种或多种乙烯基取代的芳族化合物具有8至14个碳原子，苯乙烯是优选的。基于100重量份的一种或多种共轭二烯和乙烯基取代的芳族单体，上述制剂化合物的量通常为约0.25至约20重量份。胶乳粘合剂具有良好的稳定性，并且具有许多应用，例如将纸涂层组合物结合到纤维素基材上，或将非织造纤维粘合在一起。胶乳粘合剂通常每百万重量份含有10重量份或更少的甲醛，并且理想地包含零，也就是说，即使在长时间（例如28天）之后也不含可检测量的甲醛。

60. 发明授权

US5425999A Low formaldehyde, high gel fraction latex binder 失效
$Low formaldehyde, high gel fraction latex binder$
标题翻译：低甲醛，高凝胶分数乳胶粘合剂
公开(公告)号：US5425999A
公开(公告)日：1995-06-20
申请号：US192487
申请日：1994-02-07
申请人： Peter C. Hayes
发明人： Peter C. Hayes
IPC分类号： C08L9/08 , C08F212/14 , C08F236/04 , C08F236/10 , C08L21/02 , C08L25/10 , C09D125/10 , C09J125/10 , D04H1/64 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/693 , D21H19/20 , D21H19/24 , D21H19/58 , B32B23/08
CPC分类号： C08F212/14 , C08F236/10 , C08L25/10 , C09D125/10 , C09J125/10 , D04H1/587 , D04H1/64 , D06M15/227 , D06M15/233 , D06M15/263 , D06M15/285 , D06M15/693 , D21H19/58 , Y10T428/31895 , Y10T428/31982
摘要： A low formaldehyde, high gel fraction latex binder is made utilizing a compound having the formula ##STR1## wherein R and R', independently, is an alkyl having from 1 to 10 carbon atoms, and R.sup.4 is hydrogen, or wherein R.sup.3 and R.sup.4, independently is an alkyl, an aromatic, or combinations thereof having from 1 to 10 carbon atoms, or wherein said R.sup.3 and R.sup.4 are connected to form an internal amide, and wherein the isopropenyl group is either in the ortho, meta or para position. The latex binder is generally an emulsion or latex copolymer made from various monomers including at least one or more conjugated dienes having a total of from 4 to 10 carbon atoms with butadiene being preferred and from one or more vinyl-substituted aromatics having from 8 to 14 carbon atoms, with styrene being preferred. The amount of the above formulation compounds is generally from about 0.25 to about 20 parts by weight based upon 100 parts by weight of the one or more conjugated dienes and the vinyl-substituted aromatic monomers. The latex binder has good stability, and has many applications such as to bind a paper-coating composition to a cellulose substrate, or to bind non-woven fibers together. The latex binder generally contains 10 parts or less by weight of formaldehyde per million parts by weight and desirably contains nil, that is, no detectable amounts of formaldehyde therein, even after extended periods of time, e.g., 28 days.
摘要翻译：使用具有下列化学式的化合物制备低甲醛，高凝胶分数胶乳粘合剂，其中，是具有1至10个碳原子的烷基，R 4是氢，或者其中R 3和R 4独立地是烷基，芳族或其组合具有1至10个碳原子，或其中所述R 3和R 4连接形成内酰胺，并且其中所述异丙烯基在邻位，间位或对位。胶乳粘合剂通常是由各种单体制成的乳液或胶乳共聚物，包括至少一种或多种总共4至10个碳原子的共轭二烯，其中丁二烯是优选的，并且一种或多种乙烯基取代的芳族化合物具有8至14个碳原子，苯乙烯是优选的。基于100重量份的一种或多种共轭二烯和乙烯基取代的芳族单体，上述制剂化合物的量通常为约0.25至约20重量份。胶乳粘合剂具有良好的稳定性，并且具有许多应用，例如将纸涂层组合物结合到纤维素基材上，或将非织造纤维粘合在一起。胶乳粘合剂通常每百万重量份含有10重量份或更少的甲醛，并且理想地包含零，也就是说，即使在长时间（例如28天）之后也不含可检测量的甲醛。

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