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Resin composition, two-part laminating adhesive, laminated film, and backsheet for solar cell

A technology of resin composition and compound, applied in the direction of synthetic resin layered products, adhesives, layered products, etc., can solve the problems of weak coating film strength, deterioration of bonding strength, poor appearance, etc., and achieve strong coating film strength, adhesion The effect of high bonding strength without deterioration of bonding strength

Active Publication Date: 2014-10-08
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the aforementioned polyurethane-based adhesives have the following problems in terms of stability over time: the strength of the coating film after curing is weak, the adhesive strength deteriorates in the heat and humidity resistance test, and the appearance after lamination is poor. The problem

Method used

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  • Resin composition, two-part laminating adhesive, laminated film, and backsheet for solar cell
  • Resin composition, two-part laminating adhesive, laminated film, and backsheet for solar cell
  • Resin composition, two-part laminating adhesive, laminated film, and backsheet for solar cell

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Embodiment

[0090] Hereinafter, specific synthesis examples and examples are given to describe the present invention in more detail, but the present invention is not limited to these examples. In addition, in the following examples, "parts" and "%" represent "parts by mass" and "% by mass", respectively, unless otherwise specified.

[0091] It should be noted that, in the examples of the present application, the number average molecular weight (Mn) and weight average molecular weight (Mw) were measured by gel permeation chromatography (GPC) under the following conditions.

[0092] Measuring device: HLC-8220GPC manufactured by Tosoh Corporation

[0093] Column: TSK-GUARDCOLUMN SuperHZ-L manufactured by Tosoh Corporation + TSK-GEL SuperHZM-M manufactured by Tosoh Corporation×4

[0094] Detector: RI (differential refractometer)

[0095] Data processing: Multi station GPC-8020 model II manufactured by Tosoh Corporation

[0096] Determination conditions: column temperature 40°C

[0097] ...

Synthetic example 1-1

[0101] (Synthesis Example 1-1) [Synthesis of Polyester Polyurethane Polyol (A1)]

[0102]Put 1131 parts of neopentyl glycol, 737 parts of isophthalic acid, 342 parts of phthalic anhydride, 534 parts of sebacic acid, 20 parts of trimellitic anhydride and organic titanium compound into a flask equipped with a stirring bar, a temperature sensor and a rectifying tube 1.3 parts, while passing dry nitrogen gas into the flask and stirring, it was heated to 230-250°C to carry out esterification reaction. When the acid value was 1.0 mgKOH / g or less, the reaction was stopped, and after cooling to 100° C., it was diluted with ethyl acetate until the solid content was 80%. Next, 124 parts of hexamethylene diisocyanate modified isocyanurate (SUMIDUR N-3300; manufactured by Sumitomo Bayer Urethane Co., Ltd.) and 25 parts of hexamethylene diisocyanate were put into the flask. Pass through dry nitrogen and stir, while heating to 70-80°C to carry out urethanization reaction. The reaction was...

Synthetic example 1-2

[0103] (Synthesis Example 1-2) [Synthesis of Polyester Polyurethane Polyol (A2)]

[0104] Put 1155 parts of neopentyl glycol, 755 parts of isophthalic acid, 325 parts of phthalic anhydride, 507 parts of sebacic acid, 20 parts of trimellitic anhydride and organic titanium compound into the flask with stirring rod, temperature sensor and rectification tube 1.3 parts, while passing dry nitrogen gas into the flask and stirring, it was heated to 230-250°C to carry out esterification reaction. When the acid value was 1.0 mgKOH / g or less, the reaction was stopped, and after cooling to 100° C., it was diluted with ethyl acetate until the solid content was 80%. Next, 247 parts of an isocyanurate-modified body of hexamethylene diisocyanate (SUMIDUR N-3300; manufactured by Sumitomo Bayer Urethane Co., Ltd.) and 40 parts of hexamethylene diisocyanate were put into the flask. Pass through dry nitrogen and stir, while heating to 70-80°C to carry out urethanization reaction. The reaction w...

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Abstract

Provided is a resin composition which can form a cured coating film exhibiting high strength, high bond strength and excellent long-term stability such that little deterioration in the bond strength is observed in a damp heat test and which can ensure excellent surface appearance of a laminate. Also provided are: a two-part laminating adhesive containing said resin composition; a laminated film having a layer made from the adhesive; and a backsheet for a solar cell. The resin composition comprises: a polyester polyurethane polyol which has a branched structure in the molecule and which has a weight-average molecular weight of 10,000 to 100,000 and a molecular weight distribution of 5.0 or more; a polyester polyol which has a branched structure in the molecule and which has a weight-average molecular weight of 10,000 to 50,000 and a molecular weight distribution of less than 5.0; a hydroxyl-containing epoxy resin which has a number-average molecular weight of 300 to 5,000; a hydroxyl-containing polycarbonate resin which has a number-average molecular weight of 300 to 3,000; and a polyisocyanate. The two-part laminating adhesive contains the composition.

Description

technical field [0001] The present invention relates to a resin composition, a two-component adhesive for lamination, a lamination film, and a back sheet of a solar cell, which are excellent in substrate adhesion under hot and humid conditions. Background technique [0002] In recent years, solar power generation has attracted attention as a representative of clean energy. The back sheet installed on the backmost side of the solar cell module is used to protect the power generation mechanism such as batteries and wiring from the external environment and maintain insulation. It is a layer made by bonding various functional films with an adhesive Pressed body. Adhesives used for such backsheets are required to have high adhesion to various films with different characteristics such as polyester film and polyvinyl fluoride film, and to be used for long-term maintenance in open air environments. Adhesive resistance to heat and humidity. [0003] As such an adhesive for a back ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/40B32B27/36B32B27/40C08G18/10C08G18/42C08G18/44C08L63/00C08L69/00C09J169/00H01L31/049
CPCC09J175/04H01L31/0487B32B27/40B32B7/12C08G18/4202C08G18/44C08G18/73B32B2457/00B32B27/08C08G18/4219Y02E10/50C08G18/792C08G18/4216B32B15/08C08G18/4615H01L31/049B32B27/36B32B27/32C08G18/10
Inventor 海野晃生宇野诚一穗积正巳秋田康二户田哲也
Owner DIC CORP
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