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Acrylic resin composition, organosiloxane resin composition and laminate comprising the same

A technology of acrylic resin and organosiloxane, applied in the field of organosiloxane resin composition and organosiloxane polymer, can solve the problems of insufficient durability and coating cracking.

Inactive Publication Date: 2005-01-12
TEIJIN KASEK KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Although laminates obtained by laminating cured films obtained from these coating compositions on polycarbonate substrates have excellent abrasion resistance to some extent, their durability against environmental changes and high-temperature environments is still insufficient.
[0012] In addition, in the above-mentioned laminated body, since the thermal expansion coefficient of the polycarbonate substrate and the layer formed by thermally curing the organosiloxane resin are different, under high-temperature environments, the layer formed by thermally curing the organosiloxane resin may sometimes shrink. Cases where the coating cracks due to swelling

Method used

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  • Acrylic resin composition, organosiloxane resin composition and laminate comprising the same
  • Acrylic resin composition, organosiloxane resin composition and laminate comprising the same
  • Acrylic resin composition, organosiloxane resin composition and laminate comprising the same

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Embodiment 1～5

[0308] In the following examples, the obtained laminates were evaluated by the following methods. In addition, "part" and "%" in an Example mean "weight part" and "weight%".

[0309] (1) Paint storage stability: After storing the acrylic resin composition at 23° C. for 3 months, the state of the paint was visually observed, and the paint in which gelling was not observed was rated as good.

[0310] (2) Appearance evaluation: The appearance (presence or absence of foreign matters) of the coating layer of the test piece was visually tested, and the presence or absence of cracks was confirmed.

[0311] (3) Adhesion: (according to JIS K5400 standard) Adhesive adhesive tape (trade name "セロテ-プ") made by Nichiban (trade name "セロテ-プ") that is cut into 100 checkerboards at 1 mm intervals with scissors is adhered to the coating, and then vertically Tear with high force and evaluate the number of checkerboards left on the substrate.

[0312] (4) Scratch resistance: Scrub the test piece...

reference example 1

[0324] Reference example 1 (synthesis of acrylic resin (I))

[0325] In the flask equipped with reflux cooler and stirring device and replaced with nitrogen, add 90.1 parts of methyl methacrylate (hereinafter referred to as MMA), 13 parts of 2-hydroxyethyl methacrylate (hereinafter referred to as HEMA), 0.14 parts Parts of azobisisobutyronitrile (hereinafter referred to as AIBN) and 200 parts of 1,2-dimethoxyethane were dissolved. Then, the reaction was stirred at 70° C. for 6 h under nitrogen flow. The resulting reaction liquid was poured into n-hexane and purified by reprecipitation to obtain 81 parts of a copolymer (acrylic resin (I)) having an MMA / HEMA composition ratio of 90 / 10 (molar ratio). The hydroxyl value of this copolymer was 54.3 mg KOH / g, and the polystyrene-equivalent weight average molecular weight measured by gel permeation chromatography (GPC) (column: Shodex GPCA-804, eluent THF) was 180,000.

reference example 2

[0326] Reference example 2 (synthesis of acrylic resin (II))

[0327] Except having used 80.1 parts of MMA, 26 parts of HEMA, and 0.18 parts of AIBN, 85 parts of copolymers (acrylic resin (II)) having an MMA / HEMA composition ratio of 80 / 20 (molar ratio) were obtained in the same manner as in Reference Example 1. The hydroxyl value of this copolymer was 106.0 mg KOH / g, and the weight average molecular weight in terms of polystyrene was 80,000.

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Abstract

A laminate which is excellent in appearance, adhesion, scratch resistance, abrasion resistance and hot water resistance and has a high level of weatherability and excellent durability, and an acrylic resin composition and an organosiloxane resin composition both of which can be used for the manufacture of the above laminate and have excellent storage stability. The laminate comprises a polycarbonate substrate, a first layer formed on the surface of the polycarbonate substrate, and a second layer formed on the surface of the first layer, wherein the first layer is composed of a crosslinked acrylic copolymer and an ultraviolet light absorber, and the second layer is composed of a crosslinked organosiloxane polymer; and the crosslinked acrylic copolymer comprises specific recurring units and an urethane bond in a specific ratio, and the organosiloxane polymer has a specific structure composed of colloidal silica and alkoxysilanes.

Description

technical field [0001] The present invention relates to laminates having a polycarbonate substrate, a first layer and a second layer. More specifically, the present invention relates to a laminate having a polycarbonate substrate, a first layer, and a second layer, wherein the first layer is a cross-linked acrylic copolymer, and the second layer is an organosiloxane polymer, This laminate is excellent in weather resistance, abrasion resistance, and durability. Also, the present invention relates to the acrylic resin composition used in the first layer of the laminate and the organosiloxane resin composition used in the second layer. Background technique [0002] Polycarbonate resin has the characteristics of impact resistance, transparency, lightness, processability, etc., and has been used in various applications. In particular, it has been used to replace glass due to its transparency. However, the weather resistance of polycarbonate resin is not sufficient, and it is k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B27/36C08L33/06C08L83/04C08K3/36B32B27/08C08J7/043C08J7/046C08K3/00C08K5/00
CPCC08J2483/04C08G77/04B32B27/08Y10T428/31663C08K5/0041C08J2433/04Y10T428/31507C08G77/26C08K3/0033C08J7/042Y10T428/31504B32B2369/00C08L83/04C08G77/14Y10T428/24364C08J2369/00Y10T428/31598C08G77/20C08K3/013C08J7/043C08J7/046B32B27/30
Inventor 今中嘉彦梶原俊典浴中达矢喜田稔男菅武宏新见亮十河功
Owner TEIJIN KASEK KK
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