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Polyorganosiloxane having poly(METH)acrylate groups and methods for the preparation and use thereof

A technology of polyorganosiloxane and diorganosiloxane, which is applied to polyorganosiloxane with poly(meth)acrylate group and the fields of its preparation and use, can solve the problems of low grafting efficiency and the like

Active Publication Date: 2021-10-22
DOW SILICONES CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, since chain transfer is a kinetically controlled process, the grafting efficiency may be low due to the low level of thiol functionalization

Method used

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  • Polyorganosiloxane having poly(METH)acrylate groups and methods for the preparation and use thereof
  • Polyorganosiloxane having poly(METH)acrylate groups and methods for the preparation and use thereof
  • Polyorganosiloxane having poly(METH)acrylate groups and methods for the preparation and use thereof

Examples

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example

[0138] These examples are intended to illustrate the invention and should not be construed as limiting the scope set forth in the claims. The starting materials used in the examples are shown in Table 2 below.

[0139] Table 2. Starting materials

[0140]

[0141]

[0142] In this Reference Example A, a description of the process used to prepare Macromonomer Example 1 (37BMA / 63MMA, nomenclature refers to weight %, BMA = butyl methacrylate, MMA = methyl methacrylate) is provided , wherein the monomer-based (3-mercaptopropyl)methyldimethoxysilane is 1.9% by weight. This method was used to prepare other alkoxysilyl functional (meth)acrylate macromonomers in Examples MM-2 to MM-5 by varying the appropriate starting materials and their amounts, as shown in Table 3 below . Ethyl acetate (EtOAc) was dried over molecular sieves and other components were used as supplied. A monomer mixture was prepared containing EtOAc (75g), MMA (233g), BMA (136.9g) and (3-mercaptopropyl)met...

example GP-26

[0173]In this example, GP-26, a dihydroxy-terminated polydimethylsiloxane having pendant polybutylmethacrylate groups was synthesized as follows. A 1-liter 4-necked round bottom flask with a stir bar and blades was pre-weighed and recorded prior to the start of the experiment. To this flask was added 181.3 grams of OH-terminated PDMS 1, 18.17 grams of the macromonomer of Example MM-3 (which had Mn = 8,000 g / mol and BMA = 100%), and 239.61 grams of toluene, charged to a In a round bottom flask with an overhead mechanical stirrer, a thermocouple and a Dean Stark apparatus with a water-cooled condenser connected to a nitrogen bubbler. When the kettle temperature reached 80 to 100° C. under a nitrogen blanket, 0.47 mL of Phosphazene Catalyst 1 was added. As the reaction mixture continued to heat, water, methanol and toluene distillates were collected in the Dean Stark apparatus. After enough toluene had been distilled to obtain a final concentration of 50% solids solution, the h...

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Abstract

A polydiorganosiloxane having both a silicon bonded aliphatically unsaturated group and a silicon bonded poly(meth)acrylate polymer or copolymer, and method for preparation of this polydiorganosiloxane are disclosed. The method preserves the aliphatically unsaturated groups when grafting the poly(meth)acrylate to the polydiorganosiloxane. This polydiorganosiloxane is useful in hydrosilylation reaction curable compositions, such as pressure sensitive adhesive compositions.

Description

[0001] References to related applications [0002] This application claims the benefit of U.S. Provisional Patent Application No. 62 / 818,131, filed March 14, 2019, under 35 U.S.C. Section 119(e). US Provisional Patent Application No. 62 / 818,131 is incorporated herein by reference. technical field [0003] A polyorganosiloxane having silicon-bonded poly(meth)acrylate groups (hereinafter referred to as "poly(meth)acrylate-grafted polyorganosiloxane") is disclosed. Also disclosed is a process for the preparation of poly(meth)acrylate grafted polyorganosiloxanes. Background technique [0004] Acrylic chains can be incorporated into the polydimethylsiloxane backbone using free radical polymerization by polymerizing in the presence of a mercapto-functional polydimethylsiloxane. The mercapto groups will act as chain transfer agents and enable grafting of the acrylic chains onto the polydimethylsiloxane chains as pendant and / or terminal groups. However, if the mercapto-functiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/442C08G81/02C08G77/20
CPCC08G77/442C08G81/024C08G77/20C08G77/12C09J183/10C08L83/00C08K5/56C09J7/38C08G77/18C08G77/08C09J2301/302C09J2301/414C08G77/70C09J2483/00C08K5/05
Inventor J·麦加刘南国E·若弗尔R·施密特B·凯利T·米切尔J·沃克W·萨特勒B·麦卡洛特郭自琦
Owner DOW SILICONES CORP