JPH01159087A - Formation of hardening type resin layer - Google Patents
Formation of hardening type resin layerInfo
- Publication number
- JPH01159087A JPH01159087A JP31678587A JP31678587A JPH01159087A JP H01159087 A JPH01159087 A JP H01159087A JP 31678587 A JP31678587 A JP 31678587A JP 31678587 A JP31678587 A JP 31678587A JP H01159087 A JPH01159087 A JP H01159087A
- Authority
- JP
- Japan
- Prior art keywords
- curable resin
- forming
- layer
- hardening
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 63
- 239000011347 resin Substances 0.000 title claims abstract description 63
- 230000015572 biosynthetic process Effects 0.000 title abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- 239000011342 resin composition Substances 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000011247 coating layer Substances 0.000 claims description 32
- 239000010410 layer Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 28
- -1 amine salt Chemical class 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 239000002981 blocking agent Substances 0.000 claims description 3
- 239000012948 isocyanate Substances 0.000 claims description 3
- 229920000180 alkyd Polymers 0.000 claims description 2
- 229920000877 Melamine resin Polymers 0.000 claims 1
- 239000004640 Melamine resin Substances 0.000 claims 1
- 229920001807 Urea-formaldehyde Polymers 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 6
- 238000007639 printing Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000010494 dissociation reaction Methods 0.000 description 3
- 238000007646 gravure printing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- RAADJDWNEAXLBL-UHFFFAOYSA-N 1,2-di(nonyl)naphthalene Chemical compound C1=CC=CC2=C(CCCCCCCCC)C(CCCCCCCCC)=CC=C21 RAADJDWNEAXLBL-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- HJEINPVZRDJRBY-UHFFFAOYSA-N Disul Chemical compound OS(=O)(=O)OCCOC1=CC=C(Cl)C=C1Cl HJEINPVZRDJRBY-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 208000018459 dissociative disease Diseases 0.000 description 1
- KWKXNDCHNDYVRT-UHFFFAOYSA-N dodecylbenzene Chemical compound CCCCCCCCCCCCC1=CC=CC=C1 KWKXNDCHNDYVRT-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、各種の基材表面に、例えば表面保護層や着色
印刷層のような硬化型樹脂層を形成する方法に関するも
のであり、塗工時もしくは印刷時には硬化反応が進むよ
うなことがなく、塗工層の形成後の所望時に硬化反応を
開始させるもので、安定した状態で、かつ、簡単な工程
の連続工程で、しかも、安価に、効率良く硬化型樹脂層
を形成し得る方法を提供するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for forming a curable resin layer, such as a surface protective layer or a colored printing layer, on the surface of various substrates. The curing reaction does not proceed during processing or printing, and the curing reaction starts at the desired time after the coating layer is formed.It is a stable process, is a simple continuous process, and is inexpensive. Another object of the present invention is to provide a method for efficiently forming a curable resin layer.
[従来の技術]
各種の基材表面に、優れた表面物性を具備する印刷層等
の塗工層を得る方法として、硬化型樹脂をベヒクルとす
る印刷層を形成する方法や、硬化型樹脂による表面保護
層を形成する等の方法が広く使用されており、かかる硬
化型樹脂層を簡単にしかも効率良く得る方法として、硬
化型樹脂と該硬化型樹脂に対して硬化作用を有する硬化
剤とを含有する皮膜形成用の樹脂組成物を使用する方法
が、掻く一般的な硬化型樹脂層の形成方法として利用さ
れている。[Prior art] As a method of obtaining coating layers such as printed layers with excellent surface physical properties on the surfaces of various substrates, there are methods of forming a printed layer using a curable resin as a vehicle, and methods of forming a printed layer using a curable resin as a vehicle. Methods such as forming a surface protective layer are widely used, and as a method for easily and efficiently obtaining such a curable resin layer, a curable resin and a curing agent having a curing effect on the curable resin are used. A method using a film-forming resin composition containing the above-mentioned resin composition is used as a general method for forming a curable resin layer.
[発明が解決しようとする問題点]
ところで、前記従来の硬化型樹脂と該硬化型樹脂に対し
て硬化作用を有する硬化剤とを含有する皮膜形成用の樹
脂組成物を使用する硬化型樹脂層の形成方法においては
、塗工または印刷によって形成された塗工層が経時的に
硬化するので、塗工層の形成後に塗装等の後処理を実施
する場合に、塗工層との間の接着状態が、塗工層の形成
からその後の後加工を行なうまでの時間によって相違す
るという不都合があり、また、塗工中あるいは印刷中に
も硬化型樹脂の硬化反応が進行するため、この硬化反応
の進行の度合に応じて樹脂組成物の粘度が変化し、塗工
層形成時の樹脂組成物の付着量や付着強度が相違すると
いう欠点が存する。[Problems to be Solved by the Invention] By the way, a curable resin layer using a film-forming resin composition containing the conventional curable resin and a curing agent having a curing effect on the curable resin. In the formation method, the coating layer formed by coating or printing hardens over time, so when performing post-treatments such as painting after forming the coating layer, the adhesion between the coating layer and There is an inconvenience that the condition differs depending on the time from the formation of the coating layer to the subsequent post-processing, and the curing reaction of the curable resin also progresses during coating or printing. There is a drawback that the viscosity of the resin composition changes depending on the degree of progress, and the amount and adhesion strength of the resin composition at the time of coating layer formation differ.
[問題点を解決するための手段]
本発明の硬化型樹脂層の形成方法は、基材表面に、硬化
型樹脂と、該硬化型樹脂に対する硬化剤または触媒でし
かもその作用がブロッキングされているところの硬化剤
または触媒とを含有している皮膜形成用の樹脂組成物に
よる塗工層を形成する前段工程と、前記塗工層中の硬化
剤または触媒のブロッキングを解除して、前記塗工層中
における硬化型樹脂を硬化させる後段工程とからなるも
のである。[Means for Solving the Problems] The method for forming a curable resin layer of the present invention comprises, on the surface of a base material, a curable resin and a curing agent or catalyst for the curable resin, and the action of the curable resin is blocked. However, the first step is to form a coating layer using a film-forming resin composition containing a curing agent or a catalyst, and the blocking of the curing agent or catalyst in the coating layer is released to apply the coating. It consists of a subsequent step of curing the curable resin in the layer.
本発明の硬化型樹脂層の形成方法における第1工程は、
所定の基材、例えば、紙、樹脂フィルム、金属シート等
の基材の表面に、硬化型樹脂をベヒクルとし、しかも、
その作用がブロッキングされている硬化剤または触媒を
含有する印刷インキによる印刷層や、硬化型樹脂と、該
硬化型樹脂に対する硬化剤または触媒でしかもその作用
がブロッキングされている硬化剤または触媒とを含有し
ているコーティング用組成物によるコーティング層を形
成する、すなわち、硬化型樹脂と、該硬化型樹脂に対す
る硬化剤または触媒で、しかもその作用がブロッキング
されている硬化剤または触媒とを含有している皮膜形成
用の樹脂組成物による塗工層を形成するものであるが、
前記第1工程で使用する皮膜形成用の樹脂組成物中の硬
化型樹脂は、前記樹脂組成物中に存在している硬化剤ま
たは触媒のブロッキングが解除された際に、この硬化剤
または触媒の作用によって硬化反応が開始する性質を有
する硬化型樹脂であり、樹脂組成物に使用される硬化型
樹脂と、その作用がブロッキングされた状態にある硬化
剤または触媒と、該硬化剤または触媒のブロッキングを
解除する方法との組み合わせ例は、次の通りである。The first step in the method for forming a curable resin layer of the present invention is
A curable resin is used as a vehicle on the surface of a predetermined base material, such as paper, resin film, metal sheet, etc., and
A printing layer made of a printing ink containing a curing agent or catalyst whose action is blocked, or a curable resin, and a curing agent or catalyst which is a curing agent or catalyst for the curable resin and whose action is blocked. Forming a coating layer with a coating composition containing a curable resin, and a curing agent or catalyst for the curable resin, the action of which is blocked. A coating layer is formed using a resin composition for film formation.
The curable resin in the film-forming resin composition used in the first step is cured when the curing agent or catalyst present in the resin composition is unblocked. A curable resin that has the property of starting a curing reaction upon action, and is used in a resin composition, a curing agent or catalyst whose action is blocked, and blocking of the curing agent or catalyst. Examples of combinations with methods for canceling are as follows.
[*1]
Dinonylnaphthalene 5ulfo
nic Ac1d。[*1] Dinonylnaphthalene 5ulfo
nic Ac1d.
Dinonylnaphthalene disul
fonic Ac1d。Dinonylnaphthalene disul
fonic Ac1d.
p−Toluensulfonic Ac1d 。p-Toluensulfonic Ac1d.
Dodecylbenzene 5ulfonic A
c1d等。Dodecylbenzene 5ulfonic A
c1d etc.
[*2コ
ブロック剤 R’ Hとイソシアナート化合物 RNC
Oとの間の、付加解離反応
R−N G O+ R’ H−R−N HCO−R’を
利用するものであり、解離反応を無触媒で行なう場合に
は180〜200℃以上の加熱が必要であるが、例えば
、アミン類、有機化合物、金属石鹸等からなる解離触媒
を作用させる場合には、160℃以下の温度で解離させ
ることができる。[*2 Co-blocking agent R'H and isocyanate compound RNC
This method utilizes the addition-dissociation reaction R-NGO+R' H-R-N HCO-R' between O Although necessary, when a dissociation catalyst consisting of amines, organic compounds, metal soaps, etc. is used, dissociation can be carried out at a temperature of 160° C. or lower.
なお、イソシアナート化合物 RNCOに対するブロッ
ク剤R’ Hの化合物の例は、次の通りである。Incidentally, examples of compounds of the blocking agent R'H for the isocyanate compound RNCO are as follows.
[*3]
カプセル用剤には、ゼラチン、セルロース系物質、電解
質ポリマー等が使用される。[*3] Gelatin, cellulose-based substances, electrolyte polymers, etc. are used for capsule preparations.
本発明の硬化型樹脂層の形成方法の第2工程は、前記第
1工程で形成した基材表面における塗工層を硬化させる
もので、該塗工層を形成する際に使用した皮膜形成用組
成物中に存在しているところのブロッキングされている
硬化剤または触媒の種類に応じた手段を施し、前記ブロ
ッキングを解除することによって塗工層中の皮膜形成成
分である硬化型樹脂を硬化させ、耐溶剤性、耐水性、耐
摩耗性、耐候性、耐熱性等に優れた性質を有する硬化型
樹脂層を得るものである。The second step of the method for forming a curable resin layer of the present invention is to cure the coating layer on the surface of the substrate formed in the first step, and the coating layer used in forming the coating layer is A method is applied depending on the type of blocked curing agent or catalyst present in the composition, and the blocking is released to cure the curable resin, which is a film-forming component in the coating layer. , a curable resin layer having excellent properties such as solvent resistance, water resistance, abrasion resistance, weather resistance, and heat resistance is obtained.
[実施例コ
以下、本発明の硬化型樹脂層の形成方法の具体的な構成
を実施例を以って説明する。[Example 7] Hereinafter, the specific structure of the method for forming a curable resin layer of the present invention will be explained with reference to Examples.
実施例1
坪量23 g/m”の薄葉紙からなる基材の表面に、下
記組成の印刷インキ[i]にて、木目模様の塗工層をグ
ラビア印刷法で形成し、次いで、同じく下記組成の皮膜
成形用樹脂組成物からなる印刷インキ[ii]による塗
工層を、前記木目模様の印刷面全面に、グラビア印刷法
を利用して、6 g(dry)/m2の割合で塗工し、
更、に、100℃。Example 1 A coating layer with a wood grain pattern was formed using a printing ink [i] having the following composition on the surface of a base material made of thin paper with a basis weight of 23 g/m'' using a gravure printing method, and then a coating layer having the same composition as below was formed using a gravure printing method. A coating layer of printing ink [ii] consisting of a film-forming resin composition is applied to the entire printed surface of the wood grain pattern at a rate of 6 g (dry)/m2 using a gravure printing method. ,
Further, 100℃.
10秒間の加熱、乾燥に付した。It was heated and dried for 10 seconds.
肛貝ヱニ仁曳1」」−
(1)ニトロセルロース 10重量部(2)顔
料 30重量部(3)溶 剤
60重量部狙貝〕」−11ユヨー
(1)アミノアルキッド樹脂 50重量部(2)
シリコーン 5重量部(4)溶
剤 50重量部前記得られた塗工層を
有する薄葉紙を、室温下に1か月保存したところ、塗工
層の硬化は無く、また、薄葉紙にはカールの発生も無く
、整然とした状態が維持さ°れていた。- (1) Nitrocellulose 10 parts by weight (2) Pigment 30 parts by weight (3) Solvent
60 parts by weight Sniper shell]-11 Yuyo (1) Amino alkyd resin 50 parts by weight (2)
Silicone 5 parts by weight (4)
When the thin paper having the coating layer obtained above was stored at room temperature for one month, the coating layer did not harden, and the thin paper did not curl and remained in an orderly state. It was being looked at.
しかる後に、前記保存後の薄葉紙を、150℃にて、3
0秒間加熱し、前記塗工層中のブロック化されているバ
ラトルエンスルフォン酸のブロッキングを解除すること
によって、前記塗工層中の硬化型樹脂を硬化させ、硬化
型樹脂層を形成した。After that, the preserved tissue paper was heated at 150°C for 3
By heating for 0 seconds to unblock the blocked balatoluenesulfonic acid in the coating layer, the curable resin in the coating layer was cured to form a curable resin layer.
得られたシートは、耐溶剤性、耐水性、耐摩耗性、耐候
性、耐熱性等に優れた性質を有する硬化型樹脂層を有し
ており、表面物性に優れた作用を奏する化粧シートとし
て、極めて良好な品質特性を具備していた。The obtained sheet has a curable resin layer with excellent properties such as solvent resistance, water resistance, abrasion resistance, weather resistance, and heat resistance, and can be used as a decorative sheet with excellent surface properties. , had extremely good quality characteristics.
[発明の作用、効果]
本発明の硬化型樹脂層の形成方法は、基材表面に、硬化
型樹脂と該硬化型樹脂に対する硬化作用または触媒作用
がブロッキングされている硬化剤または触媒とを含有し
ている皮膜成形用の樹脂組成物による塗工層を形成する
工程と、前記塗工層中における硬化剤または触媒のブロ
ッキングを解除することによって、該塗工層中における
硬化型樹脂を硬化させることによって硬化型樹脂層を得
る工程とからなるものである。[Operations and Effects of the Invention] The method for forming a curable resin layer of the present invention includes, on the surface of a base material, a curable resin and a curing agent or catalyst whose curing action or catalytic action on the curable resin is blocked. The curable resin in the coating layer is cured by forming a coating layer using a resin composition for film forming, and removing the blocking of the curing agent or catalyst in the coating layer. This process consists of a step of obtaining a curable resin layer.
すなわち、前記構成からなる本発明方法においては、硬
化型樹脂を皮膜形成層樹脂とする塗工層の形成時には、
前記硬化型樹脂を硬化させるための硬化剤または触媒作
用がブロッキングされている状態にあり、塗工工程が終
了した後の適宜時に、はじめて、前記塗工層中の硬化剤
または触媒のブロッキングを解除する操作を施すことに
よって、該塗工層中の硬化型樹脂の硬化反応を開始させ
るものである。That is, in the method of the present invention having the above configuration, when forming a coating layer using a curable resin as a film forming layer resin,
The curing agent or catalyst for curing the curable resin is in a blocked state, and the blocking of the curing agent or catalyst in the coating layer is released only at an appropriate time after the coating process is completed. By performing this operation, the curing reaction of the curable resin in the coating layer is started.
従って、本発明の硬化型樹脂層の形成方法においては、
塗工工程における塗工剤中の硬化剤または触媒は、その
作用が不活性状態にあるので、塗工剤1版、ドクター等
を常に一定の状態に保持させ得るものであるから、品質
の均一な硬化型樹脂層を形成し得るという作用、効果を
奏するものである。Therefore, in the method for forming a curable resin layer of the present invention,
Since the curing agent or catalyst in the coating agent in the coating process is inactive, it is possible to maintain the coating agent, doctor, etc. in a constant state at all times, resulting in uniform quality. This has the effect of forming a hardening type resin layer.
また、塗工剤の塗工工程の終了後で、しかも塗工層を硬
化させる前に、該塗工層を乾燥、固化した状態で長期間
保存しても、シートにカール等の変形を発生させること
無く、整然とした状態で保存し得るので、硬化型樹脂層
の形成時の取り扱い特性において優れた作用を奏するも
のでもある。In addition, even if the coating layer is dried and solidified and stored for a long period of time after the coating process of the coating agent is completed and before the coating layer is cured, deformation such as curling may occur in the sheet. Since it can be stored in an orderly state without causing any damage, it also exhibits excellent handling characteristics during the formation of the curable resin layer.
Claims (4)
硬化作用がブロッキングされている硬化剤または触媒作
用がブロッキングされている触媒とを含有している皮膜
形成用の樹脂組成物による塗工層を形成する工程と、前
記塗工層中における硬化剤の硬化作用または触媒の触媒
作用のブロッキングを解除することによって、該塗工層
中における硬化型樹脂を硬化させる工程とからなること
を特徴とする硬化型樹脂層の形成方法。(1) Coating the surface of a substrate with a resin composition for forming a film containing a curable resin and a curing agent whose curing action on the curable resin is blocked or a catalyst whose catalytic action is blocked. and a step of curing the curable resin in the coating layer by unblocking the curing action of the curing agent or the catalytic action of the catalyst in the coating layer. Characteristic method for forming a curable resin layer.
トルエンスルフォン酸のアミン塩であり、硬化型樹脂が
、メラミン樹脂、尿素樹脂およびアルキッド樹脂の中か
ら選択される1種以上の樹脂である特許請求の範囲第1
項記載の硬化型樹脂層の形成方法。(2) A patent in which the catalyst whose catalytic action is blocked is an amine salt of para-toluenesulfonic acid, and the curable resin is one or more resins selected from melamine resin, urea resin, and alkyd resin. Claim 1
A method for forming a curable resin layer as described in .
ロック剤と反応しているイソシアナート化合物であり、
硬化型樹脂が、ウレタン樹脂である特許請求の範囲第1
項記載の硬化型樹脂層の形成方法。(3) the curing agent whose curing action is blocked is an isocyanate compound that has reacted with the blocking agent;
Claim 1, wherein the curable resin is a urethane resin.
A method for forming a curable resin layer as described in .
イクロカプセル化されているアミン化合物であり、硬化
型樹脂が、エポキシ樹脂である特許請求の範囲第1項記
載の硬化型樹脂層の形成方法。(4) The method for forming a curable resin layer according to claim 1, wherein the curing agent whose curing action is blocked is a microencapsulated amine compound, and the curable resin is an epoxy resin. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31678587A JPH01159087A (en) | 1987-12-15 | 1987-12-15 | Formation of hardening type resin layer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31678587A JPH01159087A (en) | 1987-12-15 | 1987-12-15 | Formation of hardening type resin layer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01159087A true JPH01159087A (en) | 1989-06-22 |
Family
ID=18080887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31678587A Pending JPH01159087A (en) | 1987-12-15 | 1987-12-15 | Formation of hardening type resin layer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01159087A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017502098A (en) * | 2013-11-08 | 2017-01-19 | ピーピージー・インダストリーズ・オハイオ・インコーポレイテッドPPG Industries Ohio,Inc. | Curable film-forming composition containing carrier-associated catalyst and method for coating a substrate |
-
1987
- 1987-12-15 JP JP31678587A patent/JPH01159087A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017502098A (en) * | 2013-11-08 | 2017-01-19 | ピーピージー・インダストリーズ・オハイオ・インコーポレイテッドPPG Industries Ohio,Inc. | Curable film-forming composition containing carrier-associated catalyst and method for coating a substrate |
US11981832B2 (en) | 2013-11-08 | 2024-05-14 | Ppg Industries Ohio, Inc. | Curable film-forming compositions comprising catalyst associated with a carrier and methods for coating a substrate |
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