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Polyether modified siloxane, coating additive, coating composition, coating agent, coating and preparation method of polyether modified siloxane

A technology of polyether modified siloxane, applied in the field of polyether modified siloxane and coating additives, which can solve the problems of expensive materials and achieve the effect of small environmental load, simple environmental load and excellent antifouling performance

Pending Publication Date: 2022-07-08
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As a paint excellent in antifouling properties, a composition using an additive containing fluorine in the molecule is generally known (Patent Document 1), but the material is expensive, and an additive that does not contain fluorine is required from the viewpoint of environmental problems.

Method used

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  • Polyether modified siloxane, coating additive, coating composition, coating agent, coating and preparation method of polyether modified siloxane

Examples

Experimental program
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[0059]

[0060] Furthermore, the present invention relates to a method for producing a polyether-modified siloxane (siloxane branched polyether-modified silicone) represented by formula (1).

[0061] The method for producing the polyether-modified siloxane of the formula (1) is characterized by including the following step (I) and step (II).

[0062] Process (I): Using the average composition formula (2) (R" 3 SiO 1 / 2 ) g (R” 2 SiO 2 / 2 ) h (R”SiO 3 / 2 ) i (SiO 4 / 2 ) j (In the above formula (2), R" may be the same or different from each other and each independently is a hydroxyl group or a monovalent hydrocarbon group having 1 to 18 carbon atoms, 0≤g≤10, 0≤h≤100, 1≤i ≤30, 0≤j≤8.) The compound represented by the average composition formula (3) (R" 2 SiO 2 / 2 ) k (R”HSiO 2 / 2 ) l The compound represented and / or the average composition formula (4) (R" 3 SiO 1 / 2 ) m (R” 2 HSiO 1 / 2 ) n (R” 2 SiO 2 / 2 ) o (R”HSiO 2 / 2 ) pThe compound represented (in the above fo...

Embodiment 1

[0127] Into the reactor were added 311 g of tris(trimethylsiloxane) methylsilane (compound (2-1)), 4190 g of 1,1,3,3,5,5,7,7-octamethyl After cyclotetrasiloxane (compound (3-1)) and 331 g of 1,3,5,7-tetramethylcyclotetrasiloxane (compound (3-2)), 3.86 g of trifluoromethanesulfonic acid was added acid, reacted at 50°C for 8 hours. After the reaction, the liquid temperature was lowered to 40° C., 23.2 g of KYOWAAD SH-500 (manufactured by Kyowa Chemical Industry Co., Ltd., hydrotalcite) was added and stirred for 1 hour, and the solid content was removed by filtration. Then, the low-boiling components were removed for 5 hours at 150°C / 2torr while bubbling with nitrogen gas, and the organohydrogensiloxane represented by the following average composition formula (5-1) was synthesized in a yield of 87% (step (I). )).

[0128] Next, 97.1 g of the organohydrogensiloxane represented by the average composition formula (5-1) obtained in the step (I) and 79.7 g of the polyoxyalkylene com...

Embodiment 2

[0138] The average composition was synthesized in a yield of 87% in the same manner as in Example 1, except that 163 g of compound (2-1), 4320 g of compound (3-1), and 350 g of compound (3-2) were used in step (I). The organohydrogensiloxane represented by formula (5-2).

[0139] Next, in the step (II), 195 g of the organohydrogensiloxane represented by the average composition formula (5-2) obtained in the step (I) and 169 g of the average composition formula (6-1) were mixed in the reactor. 0.06 g of a 3 mass % isopropanol solution of chloroplatinic acid was added to the obtained mixture, and the mixture was reacted at 80° C. for 4 hours.

[0140] ((CH 3 )3 SiO 1 / 2 ) 3 ((CH 3 ) 2 SiO 2 / 2 ) 109 ((CH 3 )HSiO 2 / 2 ) 10 ((CH 3 )SiO 3 / 2 ) 1 ... average composition formula (5-2)

[0141] After the completion of the reaction, the obtained solution was heated under reduced pressure to distill off the solvent, to obtain an organopolysiloxane compound (polyether-modified s...

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Abstract

The present invention is a polyether-modified siloxane represented by the average compositional formula (1): (R3SiO1 / 2) a (R2R 'SiO1 / 2) a' (R2SiO2 / 2) b (RR 'SiO2 / 2) b' (RSiO3 / 2) c (SiO4 / 2) d. In formula (1), R is a hydrogen atom, a hydroxyl group, a monovalent hydrocarbon group having 1-18 carbon atoms, or an alkoxy group having 1-10 carbon atoms, R'is an organic group selected from the group consisting of groups represented by-CqH2q-O-(C2H4O) e (C3H6O) f-R1, R1 is a hydrogen atom, a hydrocarbon group having 1-30 carbon atoms, or an organic group represented by R6-(CO)-, and R6 is a hydrocarbon group having 1-30 carbon atoms. As a result, it is possible to provide a novel polyether-modified siloxane that imparts excellent antifouling performance with little environmental burden.

Description

technical field [0001] The present invention relates to a novel polyether-modified siloxane (siloxane branched polyether-modified organosilicon) and a coating additive containing the polyether-modified siloxane. In addition, it relates to a coating composition, a coating agent and a coating comprising the coating additive, and in further detail, it relates to a coating composition, a coating agent and a coating with antifouling properties. Further, the present invention relates to a preparation method of polyether-modified siloxane. Background technique [0002] In recent years, coatings have been applied for the purpose of preventing contamination in electrochemical products such as cellular phones, personal computers, televisions, and plasma displays, transportation equipment such as automobiles and trains, and various daily necessities. [0003] As a coating material excellent in antifouling properties, a composition containing an additive containing fluorine in the mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G65/336C08G77/46C09D5/16C09D133/00C09D163/00C09D175/04C09D201/00C09K3/00C09D7/65
CPCC08G77/46C08G65/336C09D171/02C08G18/6229C08G18/792C08G18/61C08G18/5096C09D175/08C09D133/066C09D5/1637C08L83/04C08G77/12C09D183/12C08L83/00C08L71/02C09D7/65
Inventor 后藤智幸
Owner SHIN ETSU CHEM IND CO LTD
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