JP5077822B2 - Coating agent for glass - Google Patents
Coating agent for glass Download PDFInfo
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- JP5077822B2 JP5077822B2 JP2008007139A JP2008007139A JP5077822B2 JP 5077822 B2 JP5077822 B2 JP 5077822B2 JP 2008007139 A JP2008007139 A JP 2008007139A JP 2008007139 A JP2008007139 A JP 2008007139A JP 5077822 B2 JP5077822 B2 JP 5077822B2
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Description
本発明は、ガラス用コーティング剤に関するものである。 The present invention relates to a coating agent for glass.
近年、着色又は破壊防止や傷付き防止を目的としてガラスびんにウレタン樹脂をコーティングすることが広く行われている。例えば、繰り返して使用される牛乳びんやビールびんなどのリターナブルびんは、繰り返し使用する間に強度が低下し、また外観品質が劣化するなどの不具合を生じることがあり、ガラスびんの外表面全体にウレタン樹脂のコーティング膜を形成することが行われている(特許文献1および2)。
しかしながら、上記のようなウレタン樹脂のコーティングを施したガラスびんは、カレットとして再利用する際に、有機物由来の炭素原子が着色の原因となり、リサイクル性が損なわれるという問題があった。
In recent years, it has been widely practiced to coat a glass bottle with a urethane resin for the purpose of preventing coloring or breakage or scratching. For example, returnable bottles such as milk bottles and beer bottles that are used repeatedly may suffer from problems such as reduced strength and deterioration in appearance quality during repeated use. Forming a coating film of urethane resin is performed (Patent Documents 1 and 2).
However, when the glass bottle coated with the urethane resin as described above is reused as a cullet, there is a problem that carbon atoms derived from organic matter cause coloration and recyclability is impaired.
したがって、本発明の目的は、ガラスカレットとして再利用する際にも、着色することが極めて少ないガラス用コーティング剤を提供することである。 Accordingly, an object of the present invention is to provide a coating agent for glass that is very little colored even when reused as a glass cullet.
本発明は、シラノール基を有する水系ポリウレタンの固形分100重量部に対し、メラミン系硬化剤10〜30重量部および平均粒径が10〜100nmのシリカ微粒子40〜100重量部を配合したガラス用コーティング剤を提供する。
また、本発明は、前記ガラス用コーティング剤を被覆したガラスビンを提供する。
The present invention relates to a glass coating comprising 10 to 30 parts by weight of a melamine-based curing agent and 40 to 100 parts by weight of silica fine particles having an average particle size of 10 to 100 nm based on 100 parts by weight of a solid content of an aqueous polyurethane having a silanol group. Provide the agent.
The present invention also provides a glass bottle coated with the glass coating agent.
本発明のガラス用コーティング剤で使用するシラノール基を有する水系ポリウレタンとしては、分子内に少なくとも1個のシラノール基を含有するポリウレタン樹脂であり、水相中に溶解しているもの、又は微粒子状に分散しているコロイド分散系のもの(エマルジョン)をいう。
シラノール基含有ポリウレタン樹脂中のシラノール基は、加水分解性ケイ素基が水相中で加水分解されて生成したものである。シラノール基はウレタン結合により前記シラノール基含有ポリウレタン樹脂に導入されており、1 分子内に少なくとも1 個のウレタン結合を形成させる官能基と加水分解性ケイ素基とを含有する化合物とを反応させることにより形成される。このシラノール基含有ポリウレタン樹脂中に含まれるシラノール基の存在(結合)部位は特に限定されず、該ポリウレタン樹脂の両端、何れか一方端あるいは中間部分の何れかの部位に存在(結合)していてもよい。
また、シラノール基含有ポリウレタン樹脂中に、親水性基が導入されたものが好ましく、該親水性基としては、例えば、カルボキシル基、スルホン酸基、スルホネート基等が挙げられるが、それらの中でもカルボキシル基、スルホン酸基が導入されていることが、該樹脂の水相中での安定性の点から好ましい。
The water-based polyurethane having a silanol group used in the glass coating agent of the present invention is a polyurethane resin containing at least one silanol group in the molecule and dissolved in the aqueous phase or in the form of fine particles. A dispersed colloidal dispersion (emulsion).
The silanol group in the silanol group-containing polyurethane resin is produced by hydrolyzing a hydrolyzable silicon group in an aqueous phase. Silanol groups are introduced into the polyurethane resin containing silanol groups by urethane bonds, and by reacting a functional group that forms at least one urethane bond in one molecule with a compound containing a hydrolyzable silicon group. It is formed. The presence (bonding) site of the silanol group contained in the silanol group-containing polyurethane resin is not particularly limited, and is present (bonded) at both ends, any one end, or any intermediate portion of the polyurethane resin. Also good.
In addition, those in which a hydrophilic group is introduced into the silanol group-containing polyurethane resin are preferable, and examples of the hydrophilic group include a carboxyl group, a sulfonic acid group, and a sulfonate group. From the viewpoint of stability of the resin in the aqueous phase, a sulfonic acid group is preferably introduced.
本発明のガラス用コーティング剤で使用するメラミン系硬化剤としては、メラミンとホルムアルデヒドの重縮合から得られるアミノ樹脂であり、その反応性基の種類によって完全アルキル基型、メチロール基型、イミノ基型などがある。本発明においては、比較的低温で硬化することや酸触媒を必要としない点から、メチロール基型又はイミノ基型が好ましい。
メラミン系硬化剤の配合量は、シラノール基を有する水系ポリウレタンの固形分100重量部に対して、10〜30重量部であり、好ましくは10〜25重量部であり、より好ましくは15〜25重量部である。
The melamine-based curing agent used in the glass coating agent of the present invention is an amino resin obtained by polycondensation of melamine and formaldehyde, depending on the type of reactive group, a complete alkyl group type, a methylol group type, an imino group type and so on. In the present invention, a methylol group type or an imino group type is preferable because it is cured at a relatively low temperature and does not require an acid catalyst.
The compounding quantity of a melamine type hardening | curing agent is 10-30 weight part with respect to 100 weight part of solid content of the water-based polyurethane which has a silanol group, Preferably it is 10-25 weight part, More preferably, it is 15-25 weight. Part.
本発明のガラス用コーティング剤で使用するシリカ微粒子としては、平均粒径が10〜100nmの範囲内であれば、特に制限はなく、例えば乾式法により製造されるヒュームドシリカや湿式法により製造される湿式シリカ等がある。
平均粒径の好ましい範囲は、10〜80nmであり、より好ましくは10〜50nmである。なお、本明細書において「平均粒径」とは、未凝集状態の一次粒子の平均粒径を指し、電子顕微鏡写真から測定した粒子径の算術平均値として求めている。
シリカ微粒子の配合量は、シラノール基を有する水系ポリウレタンの固形分100重量部に対して、40〜100重量部であり、好ましくは50〜90重量部であり、より好ましくは60〜80重量部である。
The silica fine particles used in the glass coating agent of the present invention are not particularly limited as long as the average particle diameter is in the range of 10 to 100 nm. For example, it is produced by fumed silica produced by a dry method or a wet method. Wet silica.
A preferable range of the average particle diameter is 10 to 80 nm, and more preferably 10 to 50 nm. In the present specification, “average particle diameter” refers to the average particle diameter of primary particles in an unaggregated state, and is obtained as an arithmetic average value of particle diameters measured from an electron micrograph.
The compounding amount of the silica fine particles is 40 to 100 parts by weight, preferably 50 to 90 parts by weight, more preferably 60 to 80 parts by weight with respect to 100 parts by weight of the solid content of the water-based polyurethane having a silanol group. is there.
本発明のガラス用コーティング剤には、さらにフロスト剤として、有機ポリマー微粒子を配合することができる。有機ポリマー微粒子は、特定の樹脂に限定されるものではなく、透明性を有するものであってもよく、また透明性を有しないものであってもよく、例えばアクリル樹脂、ポリエステル樹脂、メラミン樹脂、尿素樹脂、シリコーン樹脂、ポリカーボネート樹脂、フエノール樹脂、エポキシ樹脂、ポリ塩化ビニル樹脂、ポリウレタン樹脂、ポリエチレン樹脂、ポリプロピレン樹脂、ナイロン樹脂、フッ素樹脂などが挙げられる。目的とするフロスト調の質感、外観、程度により1種又は数種類を組合せても良い。
有機ポリマー微粒子の配合量は、シラノール基を有する水系ポリウレタンの固形分100重量部に対して、5〜40重量部であり、好ましくは10〜40重量部であり、より好ましくは20〜40重量部である。また、有機ポリマー微粒子の平均粒径は、1〜15μmの範囲が好ましく、より好ましくは5〜15μmであり、さらに好ましくは5〜10μmである。
The glass coating agent of the present invention may further contain organic polymer fine particles as a frost agent. The organic polymer fine particles are not limited to a specific resin and may have transparency, or may not have transparency. For example, acrylic resin, polyester resin, melamine resin, Examples include urea resin, silicone resin, polycarbonate resin, phenol resin, epoxy resin, polyvinyl chloride resin, polyurethane resin, polyethylene resin, polypropylene resin, nylon resin, and fluorine resin. You may combine 1 type or several types by the target frost-like texture, external appearance, and grade.
The blending amount of the organic polymer fine particles is 5 to 40 parts by weight, preferably 10 to 40 parts by weight, more preferably 20 to 40 parts by weight with respect to 100 parts by weight of the solid content of the water-based polyurethane having a silanol group. It is. The average particle size of the organic polymer fine particles is preferably in the range of 1 to 15 μm, more preferably 5 to 15 μm, and further preferably 5 to 10 μm.
本発明のガラス用コーティング剤には、さらに既知の滑剤、消泡剤、レベリング剤、着色剤等を配合しても良い。 The glass coating agent of the present invention may further contain known lubricants, antifoaming agents, leveling agents, colorants and the like.
本発明のガラス用コーティング剤の残部は水である。本発明のガラス用コーティング剤において、固形分濃度は、好ましくは10〜50重量%であり、より好ましくは10〜40重量%であり、さらに好ましくは20〜40重量%である。 The balance of the coating agent for glass of the present invention is water. In the glass coating agent of the present invention, the solid content concentration is preferably 10 to 50% by weight, more preferably 10 to 40% by weight, and still more preferably 20 to 40% by weight.
本発明のガラス用コーティング剤は、当業者に公知の方法を用いてガラスびんに適用してもよい。また、本発明のコーティング液はガラスびんの外面及び内面の両方に適用できる。本発明のコーティング液を適用するガラスびんは、公知の任意のガラス素材に対しても適用することができる。具体的なガラス素材としては、ソーダガラス、ホウケイ酸ガラス、石英ガラス、鉛ガラスなどが挙げられる。 The glass coating agent of the present invention may be applied to glass bottles using methods known to those skilled in the art. Moreover, the coating liquid of this invention is applicable to both the outer surface and inner surface of a glass bottle. The glass bottle to which the coating liquid of the present invention is applied can be applied to any known glass material. Specific examples of the glass material include soda glass, borosilicate glass, quartz glass, and lead glass.
以下、本発明を実施例により具体的に説明する。
(塗膜外観)
塗膜の割れ、剥離等の欠陥を目視にて評価した。
(透明性)
スライドグラスの片面の塗膜を完全に剥離した後、全光線透過率及び曇りの指標であるヘイズ値を測定した。
装置:スガ試験機株式会社製 SMカラーコンピューター(SM―5)
(アルカリ耐性評価)
60℃に加温した2.5%水酸化ナトリウム水溶液に15分間浸漬した後の塗膜の外観及び密着性を目視評価した。
(密着性評価)
JIS K5400 6.15碁盤目試験(碁盤目テープ法)に従い評価した。
評点 10点:剥離無し
8点:剥離面積約5%以下
6点:剥離面積約5〜15%
4点:剥離面積約15〜35%
2点:剥離面積約35〜65%
0点:剥離面積約65%以上
Hereinafter, the present invention will be specifically described by way of examples.
(Appearance of coating film)
Defects such as cracking and peeling of the coating film were visually evaluated.
(transparency)
After completely removing the coating film on one side of the slide glass, the total light transmittance and the haze value, which is an index of haze, were measured.
Equipment: SM color computer (SM-5) manufactured by Suga Test Instruments Co., Ltd.
(Alkali resistance evaluation)
The appearance and adhesion of the coating film after being immersed in a 2.5% aqueous sodium hydroxide solution heated to 60 ° C. for 15 minutes were visually evaluated.
(Adhesion evaluation)
Evaluation was made according to JIS K5400 6.15 cross cut test (cross cut tape method).
Score 10 points: no peeling 8 points: peeling area about 5% or less 6 points: peeling area about 5-15%
4 points: peeling area about 15-35%
2 points: peeling area of about 35 to 65%
0 point: More than 65% peeling area
(実施例1)
シラノール基を有する水系ポリウレタン(アニオン型ポリカーボネート系ポリウレタンエマルション(三井化学ポリウレタン社製タケラックWS−4000))の固形分100重量部に対し、メラミン系硬化剤(イミノ基型メチル化メラミン樹脂(日本サイテック社製サイメル327))20重量部およびシリカ微粒子(平均粒径30nm(日本アエロジル社製ヒュームドシリカAE50))50重量部を配合し、さらにイオン交換水を所定量加え、固形分濃度を30重量%とした後十分撹拌混合してガラス用コーティング剤を得た。このコーティング剤をスライドグラスにディッピング法にて硬化塗膜厚15μmとなるように塗装し、160℃設定の電気オーブンで15分間乾燥硬化させて試験片を得た。
Example 1
Melamine-based curing agent (imino group-type methylated melamine resin (Nippon Cytec Co., Ltd.) with respect to 100 parts by weight of solid content of water-based polyurethane having silanol groups (anionic polycarbonate-based polyurethane emulsion (Takelac WS-4000 manufactured by Mitsui Chemicals Polyurethanes)) CYMEL 327)) 20 parts by weight and silica fine particles (average particle size 30 nm (fumed silica AE50, manufactured by Nippon Aerosil Co., Ltd.)) 50 parts by weight were added, and a predetermined amount of ion-exchanged water was added, and the solid content concentration was 30% by weight. Then, the mixture was sufficiently stirred and mixed to obtain a glass coating agent. This coating agent was applied to a slide glass by a dipping method so as to have a cured coating thickness of 15 μm, and dried and cured in an electric oven set at 160 ° C. for 15 minutes to obtain a test piece.
(実施例2)
メラミン系硬化剤の配合量を15重量部とした以外は実施例1と同様にして試験片を得た。
(Example 2)
A test piece was obtained in the same manner as in Example 1 except that the blending amount of the melamine curing agent was 15 parts by weight.
(実施例3)
メラミン系硬化剤の配合量を25重量部とした以外は実施例1と同様にして試験片を得た。
(Example 3)
A test piece was obtained in the same manner as in Example 1 except that the amount of the melamine curing agent was 25 parts by weight.
(実施例4)
平均粒径が12nmのシリカ微粒子を配合した以外は実施例1と同様にして試験片を得た。
Example 4
A test piece was obtained in the same manner as in Example 1 except that silica fine particles having an average particle diameter of 12 nm were blended.
(実施例5)
平均粒径が80nmのシリカ微粒子を配合した以外は実施例1と同様にして試験片を得た。
(Example 5)
A test piece was obtained in the same manner as in Example 1 except that silica fine particles having an average particle diameter of 80 nm were blended.
(実施例6)
シリカ微粒子の配合量を80重量部とした以外は実施例1と同様にして試験片を得た。
(Example 6)
A test piece was obtained in the same manner as in Example 1 except that the amount of silica fine particles was 80 parts by weight.
(実施例7)
さらに、有機ポリマー微粒子(架橋ポリスチレン樹脂:平均粒径8μm(積水化成品工業社製テクポリマーSBX−8))を30重量部配合して、フロスト感を付与した以外は実施例1と同様にして試験片を得た。
(Example 7)
Further, 30 parts by weight of organic polymer fine particles (cross-linked polystyrene resin: average particle diameter 8 μm (Techpolymer SBX-8 manufactured by Sekisui Plastics Co., Ltd.)) were blended to give a frost feeling in the same manner as in Example 1. A specimen was obtained.
(比較例1)
メラミン系硬化剤の配合量を40重量部とした以外は実施例1と同様にして試験片を得た。
(Comparative Example 1)
A test piece was obtained in the same manner as in Example 1 except that the amount of the melamine curing agent was 40 parts by weight.
(比較例2)
平均粒径が500nmのシリカ微粒子を配合した以外は実施例1と同様にして試験片を得た。
(Comparative Example 2)
A test piece was obtained in the same manner as in Example 1 except that silica fine particles having an average particle diameter of 500 nm were blended.
(比較例3)
シリカ微粒子の配合量を120重量部とした以外は実施例1と同様にして試験片を得た。
(Comparative Example 3)
A test piece was obtained in the same manner as in Example 1 except that the amount of silica fine particles was 120 parts by weight.
Claims (4)
Priority Applications (1)
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JP2008007139A JP5077822B2 (en) | 2008-01-16 | 2008-01-16 | Coating agent for glass |
Applications Claiming Priority (1)
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JP2008007139A JP5077822B2 (en) | 2008-01-16 | 2008-01-16 | Coating agent for glass |
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JP2009167056A JP2009167056A (en) | 2009-07-30 |
JP5077822B2 true JP5077822B2 (en) | 2012-11-21 |
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DK2447332T3 (en) * | 2010-10-27 | 2014-04-28 | Kronotec Ag | Hybrid adhesive and its application to a wood-based board |
US10626047B2 (en) | 2016-10-18 | 2020-04-21 | Owens-Brockway Glass Container Inc. | Glass container coating process |
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JPH10139487A (en) * | 1996-11-06 | 1998-05-26 | Moon Star Co | Coating material for glass bottle |
JP2005343016A (en) * | 2004-06-03 | 2005-12-15 | Nippon Sheet Glass Co Ltd | Water super-repellent film-coated article |
JP4449038B2 (en) * | 2004-09-30 | 2010-04-14 | 三井化学株式会社 | Method for producing aqueous polyurethane composition |
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