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Method for preparing dual-curing single-component silk-screen printing photosensitive adhesive

A screen printing, dual-curing technology, applied in the field of preparation of dual-curing single-component screen printing photoresist, can solve the problems of pollution, poor water resistance, low initial strength, etc., and achieve improved comprehensive performance and high crosslinking density. , The effect of production process safety and environmental protection

Inactive Publication Date: 2013-09-04
浙江荣生科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems of serious pollution caused by the purification of PVA-HMA and PVA-SBQ photosensitive resins, and the problems of low initial strength and poor water resistance when the two resins are used alone, and provide a non-polluting environment, which improves the initial strength and water resistance. A method for preparing and purifying a water-based polyvinyl alcohol photosensitive resin having both HMA and SBQ photosensitive groups, and a method for preparing a high-performance screen printing photosensitive adhesive containing the photosensitive resin

Method used

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  • Method for preparing dual-curing single-component silk-screen printing photosensitive adhesive
  • Method for preparing dual-curing single-component silk-screen printing photosensitive adhesive
  • Method for preparing dual-curing single-component silk-screen printing photosensitive adhesive

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1, carried out under shading conditions, in a 1000 ml three-necked round-bottomed reaction bottle with mechanical stirring and a thermometer, add 600 ml of anhydrous methanol, add 100 grams of polyvinyl alcohol (PVA) 1788 (degree of polymerization) crushed to 200 mesh 1700, alcoholysis degree is 88%) powder, stirred and swelled at room temperature for 2 hours, added 15 grams of N-methylolacrylamide (HMA), 10 grams of N-methyl-4-formyl styryl pyridylmethyl Sulphate (SBQ), then add 0.1 g of 2,6-di-tert-butylphenol as a polymerization inhibitor, and 2 g of p-toluenesulfonic acid as a catalyst, heat up to 60 ° C, stir for 10 hours, and cool down to Room temperature, suction filtration, the filter cake is washed three times with methanol, each time with 50ml of methanol, the washed methanol is merged into the filtrate, the filter cake is dried to obtain 112 grams of light yellow powder HMA-SBQ dual-cure photosensitive resin product, the product has Good water solubil...

Embodiment 2

[0021] Embodiment two, in the filtrate that embodiment one produces, continue to add the powder of the pulverized polyvinyl alcohol 1788 of 100 grams. Stir at room temperature for 2 hours, add 12 gram of HMA monomer and 8 gram of SBQ photosensitizer, then can prepare about 115 gram of light yellow powder products according to the method of embodiment one, product performance has no significant difference with the first batch of products, filtrate Continue to apply mechanically for the third time, and the color of the product prepared is darker than that of the previous two batches, and the photosensitivity and water solubility slightly decline.

Embodiment 3

[0022] Example 3, take 15 grams of the prepared HMA-SBQ dual-curing photosensitive resin, add 85 grams of deionized water, and heat it to 80°C under stirring conditions to dissolve it to obtain a light yellow transparent aqueous solution, cool it down to 60°C, add 200 grams of solid 50% polyvinyl acetate emulsion, add dropwise 5ml of isopropanol solution containing 0.5g of water-soluble photoinitiator 2959, add a small amount of defoamer and dyeing agent, stir and mix at 60°C for 3 hours to obtain uniform silk Screen printing photosensitive emulsion, with a solid content of about 38%, can be used in the water-based screen printing industry; the screen printing plate made of this screen printing photosensitive emulsion has fast exposure speed, good bridging performance, and high resolution , high printing durability of the screen plate, because the screen printing photosensitive adhesive is a one-component product, there is no obvious change in product performance after one year...

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Abstract

The invention discloses a method for preparing a dual-curing single-component silk-screen printing photosensitive adhesive, which is carried out under the light shading condition and comprises the following steps: step 1, adding polyvinyl alcohol powder into absolute methanol and stirring at room temperature to form methanol suspension; step 2, adding HMA (grafted N-hydroxymethyl acrylamide functional monomer) and SBQ (N-methyl-4-formyl styrene pyridine methyl sulfate) photosensitizers into the methanol suspension, adding a polymerization inhibitor and a catalyst, and after heating reaction, cooling to the room temperature; step 3, carrying out extraction filtration on the methanol suspension, washing a filter cake by methanol, and after drying the filter cake, obtaining purified HMA-SBQ dual-curing photosensitive resin; step 4 , dissolving the dried HMA-SBQ dual-curing photosensitive resin into water and after carrying out heating dissolution, cooling under the stirring condition; and step 5, adding vinyl acetate emulsion or acetic styrene-acrylic emulsion into the obtained aqueous solution, then adding an antifoaming agent, a photoinitiator and a colorant and stirring and mixing to obtain the dual-curing single-component silk-screen printing photosensitive adhesive. According to the method, the environment is free from pollution; and comprehensive performance of the photosensitive adhesive product is greatly improved.

Description

technical field [0001] The invention relates to screen printing materials, in particular to a method for preparing a double-curing one-component screen printing photosensitive glue. Background technique [0002] Screen printing photosensitive adhesive is an important class of optical functional materials, mainly used for precision plate making and printing in the fields of clothing, cloth, integrated circuits, ceramics, etc.; the currently sold screen printing photosensitive adhesive mainly includes diazo two-component photosensitive adhesive , including colloids and individually packaged diazo photosensitizers. Due to the poor stability of diazo photosensitizers in aqueous solutions, photosensitive adhesives should be prepared and used immediately. If the prepared photosensitive adhesives are stored for too long, the colloids will cross-link and fail. [0003] At present, there are also one-component screen printing photosensitive adhesives to choose from, one is a water em...

Claims

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Application Information

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IPC IPC(8): G03F7/004G03F7/027
Inventor 刘日生
Owner 浙江荣生科技有限公司
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