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Structural body

A technology for structures and components, applied in building construction, other chemical processes, transportation and packaging, etc., can solve the problem that the effect of weathering adhesion is not documented, and achieve the effects of excellent weathering adhesion and excellent waterproofing.

Inactive Publication Date: 2015-06-03
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these prior documents, the combined use of a (meth)acrylate polymer with a large number of reactive silicon groups and a (meth)acrylate polymer with a small number of reactive silicon groups has adverse effects on weather resistance. Adhesive effect is not described

Method used

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Embodiment

[0285] Hereinafter, specific examples of the present invention will be described together with comparative examples, but the present invention is not limited to the following examples.

[0286] In the following synthesis examples, the "number average molecular weight" was calculated by the standard polystyrene conversion method using GPC. Among them, for the (meth)acrylate polymer of Synthesis Example 1, as a GPC column, a column filled with polystyrene cross-linked gel (shodex GPC K-804; manufactured by Showa Denko Co., Ltd.) was used, and as a GPC solvent, Chloroform was used. For the (meth)acrylate polymers of Synthesis Examples 2 to 6 and Comparative Synthesis Examples 7 to 10 and the polyoxyalkylene polymers of Synthesis Example 11, HLC-8120GPC manufactured by Tosoh Corporation was used as a liquid delivery system. TSK-GEL Type H manufactured by Tosoh Corporation was used, and THF was used as a solvent for measurement.

[0287] In the following synthesis examples, "the ...

Synthetic example 1

[0289] Under nitrogen atmosphere, add CuBr (1.09kg), acetonitrile (11.4kg), n-butyl acrylate (26.0kg) and 2,5-dibromodiethyl adipate (2.28kg) in 250L reactor, at 70 Stir at ~80°C for about 30 minutes. Pentamethyldiethylenetriamine was added thereto to start the reaction. After 30 minutes from the start of the reaction, n-butyl acrylate (104 kg) was continuously added over 2 hours. During the reaction, pentamethyldiethylenetriamine was appropriately added so that the internal temperature was 70°C to 90°C. After 4 hours from the start of the reaction, volatile matter was removed by heating and stirring at 80° C. under reduced pressure. Acetonitrile (45.7 kg), 1,7-octadiene (14.0 kg), and pentamethyldiethylenetriamine (439 g) were added thereto, and stirring was continued for 8 hours. The mixture was heated and stirred at 80° C. under reduced pressure, and the volatile matter was removed.

[0290] Add toluene to the concentrate to dissolve the polymer, then add diatomaceous e...

Synthetic example 2

[0296]In the isobutanol solution of the following monomer mixture heated to 105°C, a solution in which 2,2'-azobis(2-methylbutyronitrile) was dissolved as a polymerization initiator was dropped over 4 hours, and then After performing "post-polymerization" for 1 hour, the solvent was distilled off, and the (meth)acrylate polymer [I-2] which has a reactive silicon group was obtained. The number average molecular weight was 9000. pass 1 The H-NMR analysis determined the average number of silyl groups introduced per one molecule of the polymer, and it was about 1.7.

[0297] Methyl methacrylate: 46.5 parts by weight, n-butyl acrylate: 28.6 parts by weight, stearyl methacrylate: 20.1 parts by weight, γ-(methacryloxypropyl)trimethoxysilane: 4.8 parts by weight , 2,2'-Azobis(2-methylbutyronitrile): 3.2 parts by weight.

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Abstract

A structural body comprising a member that transmits light, a joint formed by the aforementioned member, and a solid object made of a hardening composition that is filled in the joint; wherein the hardening composition contains: (A) a (meth)acrylic acid ester polymer having in each molecule an average of 1.0 to 3.5 silicon-containing groups obtained by cross-linking by forming a siloxane bond, and having a number-average molecular weight of 8000 to 50,000; (B) a (meth)acrylic acid ester polymer having in each molecule an average of 0.5 to 1.5 silicon-containing groups obtained by forming a siloxane bond, and having a number-average molecular weight of 1000 to less than 8000; (D) a silanol condensation catalyst; (E) a silane coupling agent; and (F) an inorganic filler; the ratio between the sum of the weight (a) of component (A) and the weight (b) of component (B) in relation to the total weight (x) of the hardening composition excluding component (F) [(a+b) / x] being 60 to 99 weight%.

Description

technical field [0001] The present invention relates to a structure comprising a seam formed of at least one light-transmitting member and a cured product of a curable composition filled in the seam. Background technique [0002] An organic polymer containing at least one reactive silicon group in the molecule is known to have the property that even at room temperature, it is formed by the formation of a siloxane bond accompanied by a hydrolysis reaction of the reactive silicon group caused by moisture or the like. Cross-linked to obtain a rubber-like cured product. [0003] Among these reactive silicon-based polymers, organic polymers whose main chain skeleton is polyoxyalkylene-based polymers and (meth)acrylate-based polymers are disclosed in Patent Document 1, Patent Document 2, etc., and have been used in industry. Produced on the Internet, it is widely used in sealing materials, adhesives, coatings and other purposes. In particular, a curable composition containing a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C03C27/06E04B1/682E06B3/54E06B7/16
CPCC09K3/1006C09K2200/0625C03C17/324C03C27/10B32B17/10055Y10T428/31511Y10T428/31612Y10T428/31663B32B17/10B32B27/06B32B27/283B32B27/308B32B2250/02B32B2305/72B32B2307/412
Inventor 冈本敏彦
Owner KANEKA CORP
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