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A kind of cross-linked silicone slip agent and preparation method thereof

A technology of slip agent and silicone, applied in the direction of coating, etc., can solve the problems of excessive recoating performance and reduction of paint foam, and achieve the effects of reduced surface tension, good leveling and excellent hand feeling

Active Publication Date: 2016-12-21
GUANGZHOU SILOK POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the basis of absorbing previous research experience, the present invention is committed to improving the slipperiness and wear resistance of the paint film, and slightly reducing the surface tension, so as to solve the problems of over-stabilization of paint foam and reduction of recoating performance.

Method used

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  • A kind of cross-linked silicone slip agent and preparation method thereof
  • A kind of cross-linked silicone slip agent and preparation method thereof
  • A kind of cross-linked silicone slip agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Add 90g of polydimethylsiloxane with a viscosity of about 20mcSt, 68g of hydrogen-containing tetramethylcyclotetrasiloxane (hydrogen-containing D4), 300ml of isobutanol, and 0.5g of acetic acid as catalysts into a condenser In a three-necked flask with a thermometer, under nitrogen, they were heated to 85°C for 2 hours, and then at 85°C and under reduced pressure (-101.325kPa), the reaction mixture was degassed for 4 hours. The low molecular weight substances were removed from the product, thereby preparing the intermediate product I(A1). The viscosity of A1 at 40°C is 601356 mPa·s, the molecular weight is about 263000, and the degree of polymerization is 3552.

[0028] According to the infrared spectrogram:

[0029] 1056.8cm -1 Indicates that it contains Si-O; 1010.3cm -1 Indicates that it contains Si—C; 1257.5cm -1 、785.8cm -1 Indicates that it contains Si—CH 3 , Si—(CH 3 ) 3 Structure; 2963cm -1 Indicates that it contains a methyl structure; at 3400-...

Embodiment 2

[0039] Step 1: Use 109g of polydimethylsiloxane with a viscosity of about 50mcSt, 68g of hydrogen-containing tetramethylcyclotetrasiloxane (hydrogen-containing D4), 350ml of isobutanol, and 1.3g of 98% methanesulfonic acid as catalysts Add in a three-necked flask equipped with a condenser and a thermometer, and under nitrogen, heat them to 85°C over 2 hours, then degas the reaction mixture for 4 hours at 85°C and reduced pressure (-101.325kPa), and react After completion, low-molecular-weight substances were removed from the reaction product, thereby producing an intermediate product I(A2). The viscosity of A2 at 25° C. is 993,700 mPa·s, the molecular weight is about 303,414, and the degree of polymerization is 4,098.

[0040] According to the infrared spectrogram:

[0041] 1053.2cm -1 Indicates that it contains Si-O; 1021.3cm -1 Indicates that it contains Si—C; 1307.6cm -1 、806.1cm -1 Indicates that it contains Si—CH 3 , Si—(CH 3 ) 3 Structure; 2889cm -1 Indicates th...

Embodiment 3

[0051] Step 2: With N 2 Add 156g tetramethylcyclotetrasiloxane, 0.9g tetramethylammonium hydroxide and 273g modified ultra-high molecular weight polysiloxane (A2) in the reaction flask of conduit, thermometer and distillation head, pass N 2 Slowly heat up to 70°C and maintain for 1.8 hours. After the catalyst is completely dissolved, continue to heat up and react at 80°C for 7 hours. After the reaction is complete, raise the temperature to about 165°C and maintain for 2 hours. Add 23g of 0.01N hydrochloric acid aqueous solution and 123g of n-triacene under constant stirring, and hydrolyze the mixture for 2 hours at 65-75°C; 187g of modified ultrahigh molecular weight polysiloxane (B3) was obtained.

[0052]

[0053] According to the infrared spectrogram:

[0054] 1066.8cm -1 Indicates that it contains Si-O; 1023.2cm -1 Indicates that it contains Si—C; 1411.3cm -1 、766.1cm -1 Indicates that it contains Si—CH 3 , Si—(CH 3 ) 3 Structure; 2907cm -1 Indicates that it c...

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Abstract

The invention relates to the field of high polymer materials, in particular to a crosslinking type organic silicon slipping agent and a preparation method thereof. The structure of the modified ultra-high molecular weight polysiloxane is shown in the specification, the values of x and z are 30-50, the value of y is 1-10, the value of m is 1-10, and the value of n is 0-10. According to the crosslinking type organic silicon slipping agent, the slipping degree and wear resistance of a film are improved, the surface tension is slightly lowered, and the problems that coating foams are excessively stable and the recoating performance is lowered are solved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a crosslinked silicone slip agent and a preparation method thereof. technical background [0002] Slip agent is a coating additive that improves the smoothness of the coating film. It floats on the surface of the coating film, reduces the surface tension of the coating, reduces the friction coefficient of the coating film against the second surface, and prevents the coating film from being scratched. Improve the workability of continuous industrial coating. Commonly used slip agents include: (1) aliphatic hydrocarbons such as liquid paraffin, vaseline, synthetic paraffin, polyethylene wax, polypropylene wax; (2) fatty acid amides such as oleic acid amide; (3) silicones such as poly Methylsiloxane, polyphenylmethylsiloxane, polyether modified polydimethylsiloxane. [0003] While wood coatings, furniture coatings, plastic coatings or varnishes may vary in appearance and protectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C08G81/00
Inventor 孙东明徐运欢高鹏东
Owner GUANGZHOU SILOK POLYMER