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Method for preparing rubber pressure-sensitive adhesive

A pressure-sensitive adhesive and rubber technology, applied in the field of pressure-sensitive adhesives, can solve problems such as harsh conditions and insufficient cohesion of pressure-sensitive adhesives, and achieve the effect of improving high-temperature cohesive properties

Inactive Publication Date: 2019-01-01
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used under high temperature conditions, the SIS's styrene segment melts, resulting in insufficient cohesion of the PSA
In the prior art, the double bonds in vulcanized rubber generally need to be treated with high temperature oxides or electron beams, and the conditions are relatively harsh.

Method used

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  • Method for preparing rubber pressure-sensitive adhesive
  • Method for preparing rubber pressure-sensitive adhesive
  • Method for preparing rubber pressure-sensitive adhesive

Examples

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Effect test

preparation example Construction

[0016] Thus, the invention provides a kind of preparation method of rubber pressure-sensitive adhesive, described method comprises the following steps:

[0017] (a) mixing a styrene-isoprene-styrene block copolymer, a mercapto modifier, an initiator and a solvent to obtain a rubber mixture;

[0018] (b) heating and reacting the rubber mixture obtained in step (a) to obtain a modified rubber solution, which contains mercapto-modified styrene-isoprene-styrene block copolymer things; and

[0019] (c) Adding a tackifying resin to the modified rubber solution obtained in step (b) to obtain a rubber pressure-sensitive adhesive.

[0020] In the above step (a), the selection of the specific content of styrene-isoprene-styrene block copolymer, mercapto modifier, initiator and solvent is for better realization of styrene-isoprene- Modification of styrene block copolymers plays an important role. According to some specific embodiments of the present invention, based on the total weigh...

Embodiment 1

[0040] first step:

[0041] 74 g of Baling 1105, 1.48 g of mercaptopropionic acid, and 0.37 g of Vazo-67 were added to 126 g of xylene, and mixed well and uniformly to obtain a rubber compound.

[0042] The second step:

[0043] The obtained rubber mixture was heated at 65° C. for 12 hours to obtain a modified rubber solution B2 containing a mercapto-modified styrene-isoprene-styrene block copolymer.

[0044] The third step:

[0045] Based on 100 parts by weight of the solid content of the obtained modified rubber solution B2, 100 parts by weight of Escorez 2203 was added to the modified rubber solution B2 and mixed thoroughly to obtain a rubber pressure-sensitive adhesive.

Embodiment 2

[0047] Prepare a rubber pressure-sensitive adhesive in the same manner as in Example 1, except that: in the third step, based on 100 parts by weight of the obtained modified rubber solution B2, the modified rubber solution B2 is also added Add 0.1 parts by weight of diamine cross-linking agent RD1054 to B2.

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Abstract

The invention relates to a method for preparing a rubber pressure-sensitive adhesive. The method comprises the steps of: (a) mixing a styrene-isoprene-styrene block copolymer, a mercapto modifier, aninitiator, and a solvent to obtain a rubber mixture; (b) heating the rubber mixture obtained in the step (a) for a reaction to obtain a modified rubber solution containing the mercapto-modified styrene-isoprene-styrene block copolymer; and (c) adding tackifying resin to the modified rubber solution obtained in the step (b) to obtain the rubber pressure-sensitive adhesive. The process according tothe present invention enables chemical crosslinking of double bonds in the styrene-isoprene-styrene block copolymer under mild conditions, and the high-temperature cohesive properties of the pressure-sensitive adhesive is improved.

Description

technical field [0001] The invention relates to the field of pressure-sensitive adhesives, in particular, the invention provides a method for preparing rubber pressure-sensitive adhesives. Background technique [0002] The thermoplastic rubber pressure-sensitive adhesives currently on the market are mainly made of styrene-isoprene-styrene (SIS) rubber mixed with tackifying resins, plasticizers and some other additives, which usually have good properties. Excellent adhesive performance and high peel force. However, when used under high temperature conditions, the SIS's styrene segment melts, resulting in insufficient cohesion of the PSA. In the prior art, the double bonds in the vulcanized rubber generally need to be treated with high temperature oxides or electron beams, and the conditions are relatively harsh. [0003] Therefore, it is of great significance to develop a preparation method of pressure-sensitive adhesives that can achieve chemical crosslinking of SIS rubber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J153/02C09J123/00C08J3/24
CPCC08J3/24C08J2353/02C09J123/00C09J153/02C09J153/025C08L23/00C08L53/02C08L53/025
Inventor 林炜罡吴庆刘威
Owner 3M INNOVATIVE PROPERTIES CO
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