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Curable polysiloxane compositions and pressure sensitive adhesives made therefrom

A technology of pressure-sensitive adhesives and polyorganosiloxanes, applied in the direction of film/sheet adhesives, adhesives, pressure-sensitive films/sheets, etc., which can solve the problems of ineffective and difficult mass production

Inactive Publication Date: 2014-10-08
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this method has been used in small-scale applications, it is not as effective for large-scale manufacturing, where the delay caused by having to mix the two parts has been undesirable
Furthermore, the coating operation must be done quickly before the composition cures in the tank, and this has been difficult when working with large surface area substrates or large volumes of composition

Method used

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  • Curable polysiloxane compositions and pressure sensitive adhesives made therefrom
  • Curable polysiloxane compositions and pressure sensitive adhesives made therefrom
  • Curable polysiloxane compositions and pressure sensitive adhesives made therefrom

Examples

Experimental program
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Effect test

example

[0109] These examples are for illustrative purposes only, and are not intended to limit the scope of the appended claims. All parts, percentages, ratios, etc. in the examples, as well as in the remainder of the specification and in the claims, are by weight unless otherwise indicated. Solvents and other reagents used were obtained from Sigma-Aldrich Chemical Company; Milwaukee, Wisconsin unless otherwise indicated.

[0110] Acronym

[0111]

[0112]

[0113] testing method

[0114] 180°peel test

[0115] Samples of adhesive tape were cut to 1.27 centimeters (0.5 inches) wide and 12.7 centimeters (5 inches) long. The strips were applied to clean stainless steel panels using a 2 kg (4.5 lb) hard rubber roller rolling over a total of four strokes. Before testing, the samples were kept at room temperature (22° C.) and 50% relative humidity for 20 minutes. The stainless steel plate was then mounted on an IMass2000 Peel Tester and the strip was peeled at a 180° angl...

Synthetic example S1

[0118] Preparation of 8-Benzyl-1,8-diazabicyclo[5.4.0]undecane (PL-DBU)

[0119] To a mixture of 34.0 g (0.2 mol) of DBU and 200 ml of toluene was added 34.2 g (0.2 mol) of benzyl bromide. An insoluble oil started to form and then turned to a white solid while the temperature rose to 57°C within 10 minutes. After 4 hours, the solid was filtered and dried to obtain 62.5 g of the 8-benzyl salt soluble in water. Dilute 4.4M NaBH with 10 mL of water 414M NaOH solution (1.58 g), 15 mL tert-butyl methyl ether was added, and the magnetically stirred mixture was cooled to 3° C., and 3.23 g salt was added. After 2 hours, the cooled mixture was phase separated, the aqueous layer was extracted with tert-butyl methyl ether, and the combined tert-butyl methyl ether solution was dried and back extracted to obtain 0.86 g of a solid. GLC showed 39% of desired product, confirmed by gc / ms.

Synthetic example S2

[0121] Preparation of [DBUH][BPh 4 ](PL-salt)

[0122] A DBU sample (50 mmol, 7.6 g) was dissolved in 50 mL of 10% HCl(aq) and 17.1 g (50 mmol) NaBPh was added 4 50 ml of aqueous solution. The desired salt formed a precipitate. The salt was filtered, washed several times with water and methanol, recrystallized from a 4:1 mixture of methanol and MEK, and dried under vacuum to obtain 12.1 g of product.

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PUM

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Abstract

Curable compositions include at least one polydiorganosiloxane with at least two hydroxysilyl moieties, at least one hydroxyl-functional polyorganosiloxane resin, and at least one photoactivatable composition that, upon exposure to radiation, generates at least one base selected from amidines, guanidines, phosphazenes, proazaphosphatranes. The curable compositions can be coated on substrates and cured to form coatings, including pressure sensitive adhesives.

Description

technical field [0001] The present disclosure relates to curable silicone compositions and articles made from these curable silicone compositions, especially pressure sensitive adhesives. Background technique [0002] Various curable silicone compositions are known. Many of these curable silicone compositions are moisture curable. The curable compositions are useful in the preparation of a variety of surface coatings and surface treatments, ranging from release coatings to pressure sensitive adhesives. Moisture-curable polysiloxane compositions cure in the presence of moisture to form crosslinked materials. Moisture for curing is typically obtained from the atmosphere or the substrate on which the composition has been applied, but it may also be added to the composition (eg, to enable deep or confinement curing). [0003] Moisture-curable polysiloxane compositions typically contain groups (e.g., alkoxysilyl or acyloxysilyl moieties) that can react in the presence of moist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08G77/16C08J7/04C09J183/06C09J7/22C09J7/38C09J7/40
CPCC09J183/06C09J2483/00Y10T428/1476B05D3/06B05D3/067C09J7/0246Y10T428/2804C09J7/0225C08G77/16C09J7/0207C09D183/04Y10T428/2852C08L83/06C08J7/04C09J7/38C09J7/40C09J7/22C08L83/00C08K5/5399C08K5/31C08K5/29C08K5/17C08J2483/06
Inventor M·D·德特曼杨宇谢乔远
Owner 3M INNOVATIVE PROPERTIES CO
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