Resin having adhesivity, pressure-sensitive adhesive/binder, and hot-melt adhesive
An adhesive and resin technology, applied in the direction of adhesives, rosin adhesives, etc., can solve the problems of peeling heating stability, insufficient coating workability, insufficient melt viscosity, etc., and achieve good compatibility and coating operation. Good properties and low melt viscosity
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[0078] The present invention will be described in detail below by way of examples and comparative examples, however, the scope of the present invention is not limited by these examples.
[0079] In each example, the content of dihydroamanuic acid (DHAA), abietic acid (AA) and dehydroabietic acid (DAA) in raw rosin was measured using the following gas chromatography-mass spectrometry apparatus. In the measurement, 0.005 g of a sample (rosin) was dissolved in 0.5 g of an on-column methylation reagent (a 0.2 mole methanol solution of phenyltrimethylammonium hydroxide (PTHA), Nippon Geer Systems Co., Ltd.), and 1 μl Inject gas chromatography-mass spectrometry (GC / MS) for measurement. Each content was determined from the methyl ester product of the resin acid. The device used was a gas chromatography-mass spectrometer (manufacturer name "Agilent 6890", "Agilent 5973N"; manufactured by Agilent technologies) and a commercially available column (manufacturer name "Advance-DS", manufa...
manufacture example 1
[0092] 100 parts of Indonesian gum rosin was dissolved in 100 parts of xylene, and extracted once at room temperature using 5 parts of 48% NaOH aqueous solution and 33 parts of water. Then, the aqueous layer (extract) was neutralized with dilute hydrochloric acid, and the freed resin acid was extracted with 33 parts of xylene, and then the xylene was distilled off at 200° C. to obtain a resin acid containing 90% by weight of dihydromanylic acid. Composition (acid value 290mgKOH / g).
Embodiment 1
[0094] In a reaction vessel equipped with a stirring device, a cooling pipe, a thermometer and a nitrogen introduction pipe, 50 parts of gum rosin (10% by weight of dihydroamantic acid, 35% by weight of abietic acid, 5% by weight of dehydroabietic acid, Acid value 190mgKOH / g, softening point 80 ℃; Hereinafter referred to as ID rosin) and 50 parts of Chinese gum rosin (0% by weight dihydroamanuic acid, 50% by weight abietic acid, 5% by weight dehydroabietic acid, acid value 170mgKOH / g, softening point 75°C; hereinafter referred to as CN rosin), melt it at 200°C. Then add 1 part of fumaric acid to the reaction system and react at 200° C. for 1 hour. Subsequently, 15 parts of pentaerythritol was added to the melt at this temperature, and an esterification reaction was performed at 280° C. for 10 hours under a nitrogen stream. Thereafter, a reinforced rosin ester was synthesized by treating under reduced pressure for 3 hours. The physical properties are shown in Table 1.
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