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Temperature sensitive adhesive

A temperature-sensitive, adhesive technology, applied in the direction of adhesive types, rosin adhesives, ester copolymer adhesives, etc., can solve the problems of attaching and peeling, screaming, and damage to the adherend, etc. Achieves excellent heat resistance and suppresses squealing

Active Publication Date: 2016-10-26
NITTA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the conventional temperature-sensitive adhesive is used for the above-mentioned application, there is a problem that equipment and environment are required for sticking and peeling, and cost is incurred.
In addition, when the conventional temperature-sensitive adhesive is peeled off at room temperature, there is a problem that a so-called zipping (jumping, zipping) phenomenon occurs.
If the whistling phenomenon occurs, the adherend may be damaged due to the local load applied to the adherend

Method used

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Experimental program
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Embodiment 1～8 and comparative example 1～5

[0054]

[0055] First, the monomers shown in Table 1 were mixed in the proportions (parts by weight) shown in Table 1 to obtain a mixture. In addition, the total ratio of the (meth)acrylate which has a C16 or more linear alkyl group is shown in the column of "C16 or more" in Table 1.

[0056] The monomers used are as follows.

[0057] C22A: behenyl acrylate

[0058] C18A: stearyl acrylate

[0059] C16A: cetyl acrylate

[0060] C12A: lauryl acrylate

[0061] C1A: methyl acrylate

[0062] AA: Acrylic

[0063] RFC: Reactive fluorine compound "Viscoat 3F" represented by the above-mentioned formula (Ia) manufactured by Osaka Organic Chemical Industry Co., Ltd.

[0064] Next, the obtained mixture was added to 200 parts by weight of a mixed solvent of ethyl acetate:toluene=8:2 (weight ratio) to obtain a mixed liquid. The obtained liquid mixture was stirred at 55° C. for 4 hours to polymerize each monomer to obtain a side chain crystalline polymer.

[0065] Next, a thickener...

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Abstract

The invention provides a temperature sensitive adhesive having excellent heat resistance and can perform attachment and peeling of adherends, and inhibiting screaming during peeling at room temperature. A temperature-sensitive adhesive contains a side-chain crystalline polymer obtained by polymerizing a (meth)acrylate having a 16C or higher linear alkyl group and decreases in adhesive strength at temperatures lower than the melting point of the side-chain crystalline polymer, the melting point is 30 to 45 DEG C. The side-chain crystalline polymer consists of a copolymer obtained by polymerizing further with a reacting polysiloxane compound, in a 50 to 90 wt. ratio of the (meth)acrylate having the 16C or higher linear alkyl group to the reactive polysiloxane compound, or the (meth)acrylate having a 16C or higher linear alkyl group and tackifier having a softening point lower than 23 DEG C.

Description

technical field [0001] This invention relates to temperature sensitive adhesives. Background technique [0002] Temperature-sensitive adhesives contain side-chain crystalline polymers as the main component, and when cooled to a temperature lower than the melting point of side-chain crystalline polymers, the adhesive force is reduced due to the crystallization of side-chain crystalline polymers. Reduced binder. Temperature-sensitive adhesives are processed into sheets, tapes, etc., and are used for pre-fixing substrates made of glass, plastic, etc. (For example, refer to Patent Document 1). A temperature-sensitive adhesive used for such an application may be exposed to a high-temperature atmosphere of 100° C. or higher depending on the process, and thus heat resistance is required. [0003] However, when a conventional temperature-sensitive adhesive is used for the above-mentioned application, it may be necessary to heat it to around 50° C. in order to sufficiently express...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J193/04C09J11/06C09J7/00C09J7/02C08F220/18C08F220/14C08F220/06C08F220/22
CPCC08F220/14C08F220/18C08F220/1818C08L2201/08C09J7/00C09J7/35C09J11/06C09J133/08C09J2433/00C08L93/04C08F220/06C08F220/22C09J7/20C09J11/08C09J133/10C09J2301/122C09J2301/124
Inventor 加藤卓南地实河原伸一郎
Owner NITTA CORP
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