CN1774486A - 密封材料及其涂布方法 - Google Patents
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- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C73/16—Auto-repairing or self-sealing arrangements or agents
- B29C73/163—Sealing compositions or agents, e.g. combined with propellant agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
- B29D2030/0686—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre
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- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
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Abstract
本发明提供一种密封材料,其由下述粉体物构成,即,将粘度为20~200Pa·s/100℃的橡胶系密封材料在它的脆化温度或其以下的温度进行粉碎而形成的粉体物,还提供一种密封材料的涂布方法,该方法包括将上述粉体物喷涂到被涂布面上。
Description
技术领域
本发明涉及容易涂布、不容易产生涂斑、可以形成漂亮的涂布面的密封材料及其涂布方法。
背景技术
目前,例如在充气轮胎发生爆胎的情况下,为了使其爆胎孔自然地闭合,在充气轮胎的内面预先涂布橡胶系密封材料(自密封轮胎)。
橡胶系密封材料是在橡胶中混合各种配合剂而成的密封材料(所谓生橡胶),人们提出了各种橡胶系密封材料。例如,在特开昭53-55802号公报中,公开了由聚异丁烯和无机填充剂和过氧化物构成的防止爆胎用的橡胶系密封材料。
但是,由于橡胶系密封材料粘度高(例如,在含有丁基橡胶的密封材料的情况下,其粘度是80Pa·s/100℃左右),所以不能对被涂布面(例如,充气轮胎的内面)进行喷涂,必须用手工操作进行涂敷,所以存在操作性差,并且容易产生涂斑,不能确保无凹凸的漂亮均一涂布面的问题。
另外,如果为了能进行喷涂而添加大量的有机溶剂来降低橡胶系密封材料的粘度,则存在该有机溶剂对操作环境产生不良影响的问题。
发明内容
本发明的目的在于,提供容易涂布、且操作性好、不容易产生涂斑、可以形成漂亮的涂布面的密封材料及其涂布方法。
本发明的密封材料的特征在于,由下述粉体物构成,即,将粘度为20~200Pa·s/100℃的橡胶系密封材料在它的脆化温度或其以下的温度进行粉碎而得到的粉体物。
另外,本发明的密封材料的涂布方法的特征在于,将粘度为20~200Pa·s/100℃的橡胶系密封材料在它的脆化温度或其以下的温度进行粉碎得到粉体物,然后,将该粉体物喷涂到被涂布面上。
这样,本发明的密封材料是粘度为20~200Pa·s/100℃这样的高粘度的橡胶系密封材料形成的粉体物,另外,由于根据本发明将该粉体物喷涂到被涂布面,所以不用象以往那样用手工操作来涂敷,因而可以使涂布容易、操作性变好、不容易产生涂斑、形成漂亮的涂布面。
具体实施方式
本发明使用的橡胶系密封材料可以是一般公知的橡胶系密封材料。例如,在特开昭53-55802号公报中记载的那样的由聚异丁烯和无机填充剂和过氧化物构成的橡胶系密封材料。但是,本发明中使用的橡胶系密封材料,是粘度为20~200Pa·s/100℃的橡胶系密封材料。
作为橡胶系密封材料中的橡胶,可以是任一种橡胶,例如,可以单独使用天然橡胶、聚异丁烯(异丁烯橡胶)、丁基橡胶(异丁烯-异戊二烯橡胶)、异戊二烯橡胶、苯乙烯-丁二烯橡胶、丁二烯橡胶、丁腈橡胶、乙烯-丙烯-二烯三元共聚物橡胶等的橡胶,也可以使用它们中的多个。在这些橡胶中,因为丁基橡胶的耐空气透过性优异,所以优选使用。另外,根据需要,也可以向含有丁基橡胶的橡胶系密封材料中混合聚丁烯等橡胶以外的其它的聚合物。
作为橡胶中混合的无机填充剂,可以列举出,例如,炭黑、二氧化硅、氧化锌等。另外,根据需要,也可以混合硬脂酸、石蜡油等其它的配合剂。
在使用过氧化物时,使用一般已知的过氧化物即可(过氧化物不是一定要用)。作为该过氧化物,可以列举出,例如,过氧化苯甲酰、过氧化对氯苯甲酰等的过氧化酰基类,过氧化甲基乙基酮等的过氧化酮类,过氧化叔丁基乙酸酯、过氧化叔丁基苯甲酸酯、过氧化叔丁基邻苯二甲酸酯等的酯过氧化物类,过氧化二枯基、过氧化二叔丁基苯甲酸酯、1,3-双(过氧化叔丁基异丙基)苯等的过氧化烷基类,过氧化氢叔丁基等的过氧化氢类等。
本发明中使用的橡胶系密封材料,其粘度为20~200Pa·s/100℃,优选为粘度为80~140Pa·s/100℃。这是由于,当粘度小于20Pa·s/100℃时,粘度过低,在将橡胶系密封材料涂布到被涂布面后,橡胶系密封材料产生过度流动,所以使涂布面变得不均一,另一方面,当粘度大于200Pa·s/100℃时,粘度过高,在将橡胶系密封材料涂布到被涂布面后,橡胶系密封材料不发生流动,所以使涂布面厚薄变得不均一,因而涂布面变得不光滑。为了使橡胶系密封材料的粘度为20~200Pa·s/100℃,可以适当调整橡胶系密封材料的配合成分的混合量。
在本发明中,将粘度为20~200Pa·s/100℃的橡胶系密封材料在它的脆化温度或其以下的温度进行粉碎制成粉体物。橡胶系密封材料虽然是粘度为20~200Pa·s/100℃的高粘度的粘稠物,但在它的脆化温度或其以下的温度脆化(固化)。因此,在本发明中,将该橡胶系密封材料在它的脆化温度或其以下的温度进行粉碎制成粉体物。粉碎可以利用常用的方法进行。例如,可以在液体氮气气氛中使用低温粉碎机来粉碎橡胶系密封材料。另外,对脆化温度或其以下的温度,没有特殊的规定,但是优选比脆化温度低10℃以上或更低的温度。粉体物的大小只要是便于喷雾即可,例如,其粒径可以为3μm~8μm。
另外,在本发明中,将按照上述方法得到的粉体物喷涂到被涂布面、例如充气轮胎的内面。该涂布可以利用常用的方法,例如,使用空气喷雾管或者真空喷雾管来进行。在进行该涂布时,将粉体物直接在上述脆化温度或其以下的温度进行喷雾。这是由于,如果温度上升超过脆化温度,则粉体物不能维持其形状。另一方面,被涂布面的温度,可以是常温(20℃左右),可以为20℃~60℃,优选为30℃~50℃。这是由于,这样随着被涂布面温度的提高,被喷涂的粉体物被快速的加温、立即恢复原本的粘性,能够附着在被涂布面上。
实施例1~6、比较例1~2、现有例
使用表1中所示的混合内容(重量份)的橡胶系密封材料,对充气轮胎尺寸为195/65R15的轮胎的内面进行涂布。
在涂布时,首先,使用低温粉碎机对橡胶系密封材料在脆化温度或其以下的粉碎温度进行粉碎、形成粒径为3~8μm左右的粉体物,在将该粉体物维持在粉碎温度的同时,使用空气喷雾管向充气轮胎内面进行喷涂(实施例1~6、比较例1~2)。另外,在橡胶系密封材料中,在将如表1所示的配合成分进行混合后,在120℃×1小时的条件下加热,进行部分硫化的前处理。作为喷雾的条件,使用重力下落式喷出装置作为空气喷雾管,使粉体物在喷射口附近落下,从喷射口喷出的粉体物的流速为20m/S~100m/s,另外,将重力下落式喷出装置的喷嘴的直径设计成可以获得上述流速、并且可以充分喷出上述粉体物的直径。
充气轮胎的内面温度(涂布面温度)如表1所示。
作为现有例,由于橡胶系密封材料在常温下其粘度高,所以可以通过用手工操作将压延成薄片状的橡胶系密封材料涂敷在轮胎内面,来对充气轮胎尺寸为195/65R15的轮胎的内面进行涂布。
这样涂布时的操作性和橡胶系密封材料的涂布的厚度的均一性如表1所示。另外,表1中,“○”表示好,“△”表示不如“○”好,“×”表示差。
表1
橡胶系密封材料配合内容(重量份) | 比较例1 | 实施例1 | 实施例2 | 实施例3 | 实施例4 | 实施例5 | 实施例6 | 比较例2 | 现有例 | ||
丁基橡胶 | バイエル社BUTYL301 | 100 | 200 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
FEF碳 | 新日化力一ボンHTC#100 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | |
聚丁烯 | 低分子量 | 日石ポリブテンHV-15 | 200 | 200 | 200 | 150 | 165 | ||||
高分子量 | 日石ポリブテンHV-1900 | 200 | 180 | 180 | 150 | ||||||
Zno | 正同化学工业氧化锌3种 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | |
硬脂酸 | 日本油脂社ビ一ズステアリン酸 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
石蜡油 | 日本サン石油社SUNPAR2280 | 10 | 20 | ||||||||
醌二亚肟 | 大内新兴化学社ガルノツクGM | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | |
硫化促进剂DM | 三新科学工业サンセエラ一DM | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | |
铅丹 | 日本科学产业铅丹特号 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
粘度 | Pa·s@100℃ | 15 | 20 | 20 | 100 | 120 | 200 | 200 | 230 | 80 | |
脆化温度 | ℃ | -40 | -30 | -30 | -30 | -45 | -30 | -30 | -30 | -30 | |
粉碎温度 | ℃ | -50 | -40 | -40 | -40 | -55 | -40 | -40 | -40 | -40 | |
涂布面温度 | ℃ | 30 | 15 | 30 | 30 | 30 | 30 | 65 | 30 | 30 | |
将橡胶系密封材料涂布到轮胎内面时的操作性橡胶系密封材料厚度的均一性 | ○× | ○△ | ○○ | ○○ | ○○ | ○○ | ○△ | ○× | ×○ |
在表1中,在比较例1中,由于橡胶系密封材料的粘度低,所以涂布到轮胎内面后,密封材料产生过度流动,涂布面的厚度变得不均一。在实施例1中,由于涂布面温度低,所以涂布后的密封材料不能立即变化成有效的粘度,涂布面的厚度变得有些不均一。在实施例6中,由于涂布面的温度过高,所以涂布后的密封材料的粘度变低,涂布面的平坦性有些损坏。另外,如果涂布面温度过高,则有可能对轮胎自身带来坏影响。在比较例2中,由于橡胶系密封材料的粘度高,所以在涂布后密封材料不发生流动,在涂布区域发生厚度的部分变化,且没有消除该变化,因而涂布面不平坦从而涂布面的厚度变得不均一。
因此,由表1可知,本发明的情况(实施例1~6)与比较例1~2相比较,不容易产生涂斑,另外,与现有例相比,其操作性好。
工业可利用性
如上述说明的那样,在本发明中,将高粘度的橡胶系密封材料在它的脆化温度或其以下的温度进行粉碎而形成粉体物,然后,将该粉体物喷涂到被涂布面上,涂布简易,操作性好,不容易产生涂斑,能形成漂亮的涂布面,进而,可以涂布成任意的厚度。
本发明,不仅适用充气轮胎,还适用于房屋的屋顶和浴室等的密封,作为汽车用的灯类和车身间的密封,或者双层玻璃的密封等。
Claims (14)
1.一种密封材料,由下述粉体物构成,即,将粘度为20~200Pa·s/100℃的橡胶系密封材料在它的脆化温度或其以下的温度进行粉碎而形成的粉体物。
2.如权利要求1所述的密封材料,上述橡胶系密封材料含有丁基橡胶。
3.如权利要求2所述的密封材料,还含有聚丁烯。
4.如权利要求1~3的任一项所述的密封材料,上述脆化温度或其以下的温度是比脆化温度低10℃或更低的温度。
5.如权利要求1~4的任一项所述的密封材料,上述粉体物的粒径为3μm~8μm。
6.如权利要求1~5的任一项所述的密封材料,在液体氮气气氛中,在脆化温度或其以下的温度进行橡胶系密封材料的粉碎。
7.一种密封材料的涂布方法,该方法包括将粘度为20~200Pa·s/100℃的橡胶系密封材料在它的脆化温度或其以下的温度进行粉碎制成粉体物,然后,将该粉体物喷涂到被涂布面上。
8.如权利要求7所述的密封材料的涂布方法,上述橡胶系密封材料含有丁基橡胶。
9.如权利要求8所述的密封材料的涂布方法,还含有聚丁烯。
10.如权利要求7~9的任一项所述的密封材料的涂布方法,上述脆化温度或其以下的温度是比脆化温度低10℃或更低的温度。
11.如权利要求7~10的任一项所述的密封材料的涂布方法,上述粉体物的粒径是3μm~8μm。
12.如权利要求7~11的任一项所述的密封材料的涂布方法,在液体氮气气氛中,在脆化温度或其以下的温度进行橡胶系密封材料的粉碎。
13.如权利要求7~12的任一项所述的密封材料的涂布方法,上述被涂布面是充气轮胎的内面。
14.如权利要求7~13的任一项所述的密封材料的涂布方法,上述被涂布面的温度是20℃~60℃。
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JP (1) | JP4386889B2 (zh) |
KR (1) | KR101100063B1 (zh) |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101797553B (zh) * | 2009-10-19 | 2012-07-18 | 河北新华橡胶密封件集团柳州密封件有限公司 | 橡胶密封条在线喷涂工艺 |
CN105924903A (zh) * | 2016-06-14 | 2016-09-07 | 冯智勇 | 内含601增粘树脂的轮胎密封复合新材料 |
CN109130710A (zh) * | 2018-08-17 | 2019-01-04 | 安徽佳通乘用子午线轮胎有限公司 | 内附密封胶层具有防穿孔性能的充气轮胎及其制造方法 |
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JP5076365B2 (ja) * | 2006-06-02 | 2012-11-21 | 横浜ゴム株式会社 | タイヤ用ゴム組成物 |
CN101778715A (zh) * | 2007-07-24 | 2010-07-14 | 横滨橡胶株式会社 | 自封式充气轮胎的制造方法和装置 |
JP4968177B2 (ja) * | 2008-05-21 | 2012-07-04 | 横浜ゴム株式会社 | 空気入りタイヤの製造方法 |
JP5262415B2 (ja) * | 2008-08-12 | 2013-08-14 | 横浜ゴム株式会社 | 空気入りタイヤの修理方法及びタイヤ修理材 |
FR2953760B1 (fr) * | 2009-12-14 | 2013-01-11 | Michelin Soc Tech | Bandage pneumatique avec couche auto-obturante integree |
KR20130022893A (ko) * | 2011-08-26 | 2013-03-07 | 한국타이어월드와이드 주식회사 | 공기압 타이어 및 이의 제조방법 |
JP5480319B2 (ja) | 2012-03-13 | 2014-04-23 | 日東電工株式会社 | 粘着剤組成物、粘着シートおよび透湿防水粘着シート |
KR101350580B1 (ko) * | 2012-09-27 | 2014-01-10 | 금호타이어 주식회사 | 자가밀봉 성능을 갖는 타이어용 실란트 조성물 |
CN105899377B (zh) * | 2014-01-30 | 2021-08-06 | 住友橡胶工业株式会社 | 自修复轮胎 |
KR102082730B1 (ko) * | 2017-12-26 | 2020-02-28 | 넥센타이어 주식회사 | 자기 밀봉 타이어 조성물 및 그 혼합 제조방법 |
CN113002022B (zh) * | 2021-03-25 | 2022-03-08 | 南京工程学院 | 一种纤维增强树脂基复合材料修复方法 |
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JPS5053439A (zh) * | 1973-09-12 | 1975-05-12 | ||
JPS5273401A (en) * | 1975-12-11 | 1977-06-20 | Sumitomo Rubber Ind | Pneumatic tire with adhesive puncture sealing layer |
JPS5855197B2 (ja) | 1976-10-27 | 1983-12-08 | オ−ツタイヤ株式会社 | パンク防止用粘着シ−ラント組成物層を備えた空気入りタイヤ |
JPS5386777A (en) * | 1976-12-30 | 1978-07-31 | Sumitomo Rubber Ind | Method and apparatus for forming puncture protection layer on tire inner face |
GB1599405A (en) * | 1977-08-11 | 1981-09-30 | Dunlop Ltd | Puncture sealants |
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US6140418A (en) * | 1996-10-04 | 2000-10-31 | Kuraray Co., Ltd. | Thermoplastic polymer composition |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101797553B (zh) * | 2009-10-19 | 2012-07-18 | 河北新华橡胶密封件集团柳州密封件有限公司 | 橡胶密封条在线喷涂工艺 |
CN105924903A (zh) * | 2016-06-14 | 2016-09-07 | 冯智勇 | 内含601增粘树脂的轮胎密封复合新材料 |
CN109130710A (zh) * | 2018-08-17 | 2019-01-04 | 安徽佳通乘用子午线轮胎有限公司 | 内附密封胶层具有防穿孔性能的充气轮胎及其制造方法 |
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WO2004092296A1 (ja) | 2004-10-28 |
US7666472B2 (en) | 2010-02-23 |
DE112004000459T5 (de) | 2008-03-20 |
DE112004000459B4 (de) | 2012-08-30 |
KR20060002993A (ko) | 2006-01-09 |
JPWO2004092296A1 (ja) | 2006-07-06 |
US20060148927A1 (en) | 2006-07-06 |
CN100348685C (zh) | 2007-11-14 |
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