Hydrogenated styrene-conjugated diene copolymer as well as preparation method and application thereof in self-adhesive films

A hydrogenated styrene and conjugated diene technology, applied in adhesives, film/sheet adhesives, film/sheet without carrier, etc., can solve problems such as dimensional stability limitations, and achieve excellent adhesive strength, Excellent adhesion stability and low environmental impact

Inactive Publication Date: 2018-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

and has certain limitations in

Method used

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  • Hydrogenated styrene-conjugated diene copolymer as well as preparation method and application thereof in self-adhesive films
  • Hydrogenated styrene-conjugated diene copolymer as well as preparation method and application thereof in self-adhesive films
  • Hydrogenated styrene-conjugated diene copolymer as well as preparation method and application thereof in self-adhesive films

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0062] Example 1

[0063] Preparation of hydrogenated styrene-conjugated diene copolymers:

[0064] Add 3 liters of pure cyclohexane (water value<20ppm), 21mL of styrene, 6.5mL of regulator (furan) to the 5-liter polymerization kettle purified by nitrogen, start stirring, heat up to 45~55 ℃, add initiator positive Butyllithium (or sec-butyllithium), react for 30min, then add 400mL of butadiene, react for 50min, control the maximum temperature not to exceed 65℃, then add 21mL of styrene, react at 60~65℃ for 30min, and finally add 18mL of isobutylene pentadiene, react for 20min. After the polymerization reaction was completed, the glue solution was introduced into a 5-liter hydrogenation kettle, the temperature was raised to 70° C., a hydrogenation catalyst was added, the hydrogenation pressure was 0.8-1.5Mpa, and the hydrogenation reaction was performed for 120 minutes. After the hydrogenation reaction is completed, the reaction is terminated, the glue solution is purified, t...

Example Embodiment

[0070] Example 2

[0071] Preparation of hydrogenated styrene-conjugated diene copolymers:

[0072] Add 3 liters of pure cyclohexane (water value<20ppm), 21 mL of styrene, 6.5 mL of regulator (tetrahydrofurfuryl alcohol ethyl ether), 1 mL of furan to the 5 liters of nitrogen-purified polymerization kettles, start stirring, and heat up to 45 ~55℃, add initiator n-butyllithium (or sec-butyllithium), react for 30min, then add 400mL butadiene, react for 50min, control the maximum temperature not to exceed 65℃, then add 21mL styrene, at 60~65 The reaction was carried out at °C for 30 min, and finally 20 mL of butadiene was added, and the reaction was continued for 20 min. After the polymerization reaction was completed, the glue solution was introduced into a 5-liter hydrogenation kettle, the temperature was raised to 70° C., a hydrogenation catalyst was added, the hydrogenation pressure was 0.8-1.5Mpa, and the hydrogenation reaction was performed for 120 minutes. After the hydro...

Example

[0079] Comparative Example 1

[0080] The hydrogenated styrene-butadiene block copolymer YH-502 produced by Baling Petrochemical and polypropylene C were used to make films for testing. The performance parameters are shown in Table 3.

[0081] table 3

[0082]

[0083] As shown in Tables 1 and 2, the films of Examples 1 and 2 exhibited initial adhesive strengths of 2 g / 25 mm or more, and it can be seen that they could ensure an initial adhesive strength improved by more than 30% over the films of Comparative Examples .

[0084] In addition, the case of Comparative Example 1 shows that films made from conventional hydrogenated styrene-conjugated diene block copolymers have substantially no initial adhesive strength.

[0085] In contrast, when the relationship of Equation 1 is satisfied, the films of Examples show a rate of change in adhesive strength of 30% or less, and it can be seen that the films can still be maintained even after aging the films under high temperature ...

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Abstract

The invention discloses a hydrogenated styrene-conjugated diene copolymer as well as a preparation method and application thereof in self-adhesive films. The hydrogenated styrene-conjugated diene copolymer has the following expression: S1-EB1-S2-EB2, wherein S1 and S2 are styrene blocks; EB1 is a hydrogenated butadiene block; and EB2 is a hydrogenated conjugated diene block. The hydrogenated styrene-conjugated diene copolymer has good processing properties and can be used for preparing the self-adhesive films together with other poly stylene polymers; and the prepared self-adhesive films are less affected by temperature, humidity and other external conditions, have good stability, have adhesive strength capable of being controlled within a wide range, and are suitable for application requirements of various materials.

Description

technical field [0001] The invention relates to a hydrogenated styrene-conjugated diene copolymer and a preparation method thereof, as well as the application of the hydrogenated styrene-conjugated diene copolymer in the preparation of self-adhesive films, belonging to the field of preparation of new functional polymer materials. Background technique [0002] The protective film is a film used to protect the surface of vulnerable objects, and its purpose is to prevent the surface of the protected substrate from being damaged or polluted during transportation, assembly, and processing. The protective film will always be attached to the surface of the protective substrate until the product is delivered to the user before being torn off and discarded. According to the application, the protective film can be divided into digital product protective film, car protective film, household protective film, food fresh-keeping protective film and so on. [0003] Protective films can be...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F8/04C09J7/10
CPCC08F8/04C08F2400/02C09J7/00C08F297/04
Inventor 苏滢梁红文莫笑君严绍敏李楚新
Owner CHINA PETROLEUM & CHEM CORP
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