Positive type infrared light responsive composition, positive type printing plate and method of use thereof
A composition and infrared light technology, applied in the field of printing plates, can solve problems such as unstable plate quality, achieve good preservation performance, high sensitivity, and good repayment
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Embodiment 1
[0030] (1) Preparation of Infrared Sensitive Composition
[0031] (a) Synthesis of Hydrophilic Polymer I
[0032] Add 500ml of absolute ethanol into a 1L four-necked round-bottomed flask equipped with a sealed mechanical stirring device, a reflux condenser, a dropping funnel, and a nitrogen gas introduction tube, start stirring, pass in dry nitrogen, and bubble for 15 minutes. Heat the water bath to 60°C. After the temperature is constant, add a solution consisting of 144g of acrylic acid, 142g of acrylamide, 1g of benzoyl peroxide and 200ml of absolute ethanol from which the polymerization inhibitor has been removed, and drop it in 30 minutes. After maintaining the reaction at 60° C. for 5 hours, 1 g of benzoyl peroxide was added to maintain the temperature, and the reaction was continued for 10 hours before the reaction was terminated. The reaction mixture was naturally cooled to room temperature.
[0033] The cooled reaction solution was dropped into 5 L of acetone equipp...
Embodiment 2
[0051] (1) Preparation of Infrared Sensitive Composition
[0052] (a) Synthesis of Hydrophilic Polymer II
[0053] Add 500ml of absolute ethanol into a 1L four-necked round-bottomed flask equipped with a sealed mechanical stirring device, a reflux condenser, a dropping funnel, and a nitrogen gas introduction tube, start stirring, pass in dry nitrogen, and bubble for 15 minutes. Heat the water bath to 60°C. After the temperature is constant, add a solution consisting of 129g of methacrylic acid, 213g of acrylamide, 1g of benzoyl peroxide and 300ml of absolute ethanol from which the polymerization inhibitor has been removed, and drop it in 30 minutes. After maintaining the reaction at 60° C. for 5 hours, 1 g of benzoyl peroxide was added to maintain the temperature, and the reaction was continued for 10 hours before the reaction was terminated. The reaction mixture was naturally cooled to room temperature.
[0054] The cooled reaction solution was dropped into 5 L of acetone e...
Embodiment 3
[0072] (1) Preparation of Infrared Sensitive Composition
[0073] (a) Synthesis of Hydrophilic Polymer III
[0074] Add 500ml of absolute ethanol into a 1L four-necked round-bottomed flask equipped with a sealed mechanical stirring device, a reflux condenser, a dropping funnel, and a nitrogen gas introduction tube, start stirring, pass in dry nitrogen, and bubble for 15 minutes. Heat the water bath to 60°C. After the temperature is constant, add a solution consisting of 172g of methyl acrylate, 213g of acrylamide, 1g of benzoyl peroxide and 300ml of absolute ethanol from which the polymerization inhibitor has been removed, and drop it in 30 minutes. After maintaining the reaction at 60° C. for 5 hours, 1 g of benzoyl peroxide was added to maintain the temperature, and the reaction was continued for 10 hours before the reaction was terminated. The reaction mixture was naturally cooled to room temperature.
[0075] The cooled reaction solution was dropped into 5 L of acetone e...
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