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Organosilicon polyether copolymer as well as preparation method and application thereof

A technology of polyether copolymer and silicone, which is applied in the field of silicone polyether copolymer and its preparation, can solve the problems of polyurethane foam performance such as poor pore size, thermal conductivity and closed cell content, complex reaction process, and poor adjustability , to achieve the effect of large openness, simple synthesis process and easy implementation

Pending Publication Date: 2022-03-01
南京美思德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the reaction process of the existing branched polyether-modified silicone copolymer is complicated, and the structure is limited by the reactive group, and the adjustability is poor. The performance of the corresponding polyurethane foam (especially rigid polyurethane foam) (including pore size, thermal conductivity and closed cell content) are poor

Method used

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  • Organosilicon polyether copolymer as well as preparation method and application thereof
  • Organosilicon polyether copolymer as well as preparation method and application thereof
  • Organosilicon polyether copolymer as well as preparation method and application thereof

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preparation example Construction

[0065] Correspondingly, the present application also provides a preparation method of the above-mentioned silicone polyether copolymer, for example, may include the following steps: alkanes, vinyl-terminated polysiloxanes, and allyl polyethers, followed by solvent removal.

[0066] In a preferred embodiment, the polydimethyl-methylhydrogensiloxane is first reacted with a vinyl-terminated polysiloxane and subsequently reacted with an allyl polyether. Specifically, vinyl-terminated polysiloxane may be added dropwise into polydimethyl-methylhydrogensiloxane.

[0067] In the present application, the reaction between polydimethyl-methylhydrogensiloxane and vinyl-terminated polysiloxane can be carried out at 80-130°C (such as 80°C, 85°C, ℃, 90℃, 95℃, 100℃, 105℃, 110℃, 115℃, 120℃, 125℃ or 130℃, etc.) for 0.5-1h (such as 0.5h, 0.6h, 0.7h, 0.8h, 0.9h or 1h, etc.).

[0068] In addition, during the reaction process of polydimethyl-methylhydrogensiloxane and vinyl-terminated polysiloxa...

Embodiment 1

[0083] This embodiment provides a kind of silicone polyether copolymer, and its preparation method is as follows:

[0084] (1) Add 169.34g of octamethylcyclotetrasiloxane, 18.31g of tetramethylcyclotetrasiloxane and 12.36g of hexamethyldisiloxane into the reactor, under the action of 10.00g of acid clay, at 80°C React for 4h to obtain polydimethyl-methylhydrogensiloxane.

[0085] (2) Add 70.48g of octamethylcyclotetrasiloxane and 29.52g of tetramethyldivinyldisiloxane into the reactor, and react at 80°C for 4h under the action of 5.00g of acid clay to obtain vinyl-terminated polystyrene Dimethicone.

[0086] (3) Add 127.35g of polydimethyl-methylhydrogensiloxane, 30g of isopropanol, 6ppm of chloroplatinic acid catalyst and 150ppm of triethanolamine cocatalyst into the reactor, heat up to 80-90°C under normal pressure, and Add 6.43g of vinyl-terminated polydimethylsiloxane dropwise within 0.5h, and keep warm for 0.5h after the dropwise addition; then add 166.23g of allyl poly...

Embodiment 2

[0092] This embodiment provides a kind of silicone polyether copolymer, and its preparation method is as follows:

[0093] (1) Add 171.81g of octamethylcyclotetrasiloxane, 19.44g of tetramethylcyclotetrasiloxane and 8.75g of hexamethyldisiloxane into the reactor, and react at 30°C under the action of 4.00g of sulfuric acid 8h, polydimethyl-methylhydrogensiloxane was obtained.

[0094] (2) Add 81.40 g of octamethylcyclotetrasiloxane and 18.60 g of tetramethyldivinyldisiloxane into the reactor, react with 2.00 g of clay sulfate at 30°C for 8 hours to obtain vinyl-terminated polystyrene Dimethicone.

[0095] (3) Add 93.91g of polydimethyl-methylhydrogensiloxane, 24g of toluene, 7ppm of chloroplatinic acid catalyst and 200ppm of triethylamine cocatalyst into the reactor, and heat up to 110-120°C under normal pressure. Add 4.18g of vinyl-terminated polydimethylsiloxane dropwise within h, and keep warm for 0.5h after the dropwise addition; then add 201.90g of allyl polyether, fini...

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Abstract

The invention discloses an organosilicon polyether copolymer as well as a preparation method and application thereof, and belongs to the technical field of organosilicon polymers. The structure of the copolymer is as follows: the values of m, n and q are respectively 10-100, 1-10 and 0.1-0.6, and m + n + q is equal to 11.1-110.6; r1 is equal to-CH2CH2CH2O (CH2CH2O) x (CH2CHCH3O) yR3, and the values of x and y are respectively 6 to 60 and 0 to 30; r2 =-Si (CH3) 2-O-[Si (CH3) 2O] r-(CH3) 2Si-, and r = 2-20; and R3 is-H or alkyl with the carbon atom number of 1-4. The copolymer is a polyether modified organosilicon copolymer with a branched structure, breaks through the structural limitation of a linear comb-shaped copolymer, improves the foam stability of the copolymer, has high openness, and can meet the foam stability requirements of different polyurethane systems.

Description

technical field [0001] The invention relates to the technical field of silicone polymers, in particular to a silicone polyether copolymer and its preparation method and application. Background technique [0002] Silicone polyether copolymer is usually a comb structure copolymer with siloxane as the main chain and polyether as the side chain, in which siloxane is used as the hydrophobic group, so that the product has low surface tension and excellent chemical stability. Electrical insulation, anti-aging and other properties; polyether as a hydrophilic group makes the product have good surface activity. Changes in the type, quantity and position of the side chain grafted polyether can effectively adjust the hydrophilic and lipophilic properties of the copolymer, thereby obtaining different properties such as foam stabilization, defoaming, lubrication, and emulsification. [0003] Due to the above-mentioned unique properties of the silicone polyether copolymer, the silicone po...

Claims

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Application Information

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IPC IPC(8): C08G77/46C08G18/48C08J9/14C08G101/00
CPCC08G77/46C08G18/4804C08J9/141C08G2101/00C08J2203/14C08G2110/0025
Inventor 唐雄峰黄登登何运伟
Owner 南京美思德新材料有限公司
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