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Pressure-sensitive adhesive composition and acrylic pressure-sensitive adhesive composition

一种压敏胶粘剂、组合物的技术，应用在压敏胶粘剂组合物和丙烯酸类压敏胶粘剂组合物领域，能够解决压敏胶粘剂变硬、粘性降低、粘合剂粘合性能不充分等问题，达到耐热性和耐光性优良、粘性良好的效果

Active Publication Date: 2016-11-09
ARAKAWA CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] General rosin-based compounds are hard and brittle at room temperature. Therefore, especially when blended into acrylic pressure-sensitive adhesives, the following problems arise: causing a decrease in viscosity; pressure-sensitive adhesives become hard at low temperatures and cannot express Sufficient adhesive force; causing tearing sound (jupping) and other phenomena; etc.
[0007] In Patent Document 1, the structure and glass transition temperature (Tg) of the conventional liquid rosin-based tackifying resin used are not clearly described, and the adhesive performance at low temperatures is insufficient.
In addition, in Patent Document 1, no countermeasures are taken regarding the stability of the adhesive to heat or light.
[0008] In addition, a pressure-sensitive adhesive that contains a rosin-based compound as a tackifier and has an odor so low that it can be used as a hygienic material has not yet been developed.

Method used

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  • Pressure-sensitive adhesive composition and acrylic pressure-sensitive adhesive composition
  • Pressure-sensitive adhesive composition and acrylic pressure-sensitive adhesive composition
  • Pressure-sensitive adhesive composition and acrylic pressure-sensitive adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0077] Production example 1 (production of rosin ester 1)

[0078] 100 g of Chinese disproportionated rosin (manufactured by Arakawa Chemical Co., Ltd., Wuzhou, Guangxi) and 300 g of methanol were put into a 1 L autoclave, and after removing oxygen in the system, the temperature was raised to 290°C. The inner pressure of the autoclave reached 14 MPa at the maximum. The contents were allowed to react for 2 hours while blowing air every 20 minutes. After concentrating the obtained reaction solution with a rotary evaporator, 5 g of calcium hydroxide was added and simple distillation was performed. Under conditions of a liquid temperature of 150 to 270° C. and a pressure of 0.4 kPa, 6 g of an initial fraction was removed to obtain 68 g of rosin ester 1 as a main fraction.

manufacture example 2

[0079] Production example 2 (production of rosin ester 2)

[0080] 65 g of rosin ester 2 were obtained in the same manner as in Production Example 1 except that the Chinese disproportionated rosin in Production Example 1 was changed to Chinese Hydrogenated Rosin (manufactured by Guangxi Wuzhou Richeng Forestry Chemical Co., Ltd.).

manufacture example 3

[0081] Production example 3 (production of rosin ester 3)

[0082] 100 g of Chinese disproportionated rosin (manufactured by Arakawa Chemical, Wuzhou, Guangxi) and 300 g of n-butanol were charged into a 1 L autoclave, and after removing oxygen in the system, the temperature was raised to 290°C. The internal pressure of the autoclave reached 10 MPa at the maximum. The contents were allowed to react for 2 hours while blowing air every 20 minutes. After concentrating the obtained reaction solution with a rotary evaporator, 5 g of calcium hydroxide was added and simple distillation was performed. Under conditions of a liquid temperature of 150 to 270° C. and a pressure of 0.4 kPa, 5 g of the initial fraction was removed to obtain 71 g of rosin ester 3 as the main fraction.

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Abstract

Provided is a pressure-sensitive adhesive which is effectively odorless, has outstanding hue, has excellent adhesive properties and tack at low-temperatures of around 5 DEG C, and minimal deterioration over time due to heat and / or light. This pressure-sensitive adhesive composition contains a liquid rosin ester compound, the rosin ester compound being obtained by reacting a rosin compound and a C1-10 monovalent alcohol compound. The composition has a Gardner color standard of 1 or less, a glass transition temperature not exceeding -20 DEG C, a degree of esterification not exceeding 93wt%, and a ratio (Y' / Y), where Y' is the sum of the peak surface area of the area having a retention time of 16-22 minutes at the sum of the peak surface area sum (Y) during the entire duration of gas chromatography under the following conditions, not exceeding 200ppm.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive composition and an acrylic pressure-sensitive adhesive composition. Background technique [0002] Hygienic material products such as paper diapers and sanitary napkins are usually composed of sanitary materials such as top sheets, back sheets, hot-melt pressure-sensitive adhesives, stretchable materials, water-absorbent resins, and pulp fibers. Such sanitary materials use a large amount of synthetic resins, and therefore, odors derived from raw material components may be generated. Sanitary material products are products that are worn on the human body. Therefore, even a slight odor can cause discomfort to the user, and deodorization is desired. [0003] Among the above-mentioned sanitary materials, hot-melt pressure-sensitive adhesives in particular have a large odor originating from the raw materials used, and the odor is easily emitted during use of sanitary products. Therefore, it is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J201/00C09J11/06C09J133/00
CPCC09J133/02C08L93/04C09F1/04C09J133/00C09J153/00
Inventor 中谷隆佐藤义昌柏原徹也舟越靖
Owner ARAKAWA CHEM IND LTD
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