Organic fluorosilicone emulsion release agent and preparation method thereof

A technology of release agent and silicone emulsion, applied in the field of functional additives, can solve the problems of poor release ability, slow curing speed, and easy occurrence of oil floating in silicone emulsion.

Pending Publication Date: 2022-06-24
FENGHUA HUIHONG ORGANOSILICON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the application, people found that based on D 4 The hydroxyl emulsion prepared by emulsion polymerization is prone to oil floating on the surface of the silicone emulsion during production and application; while the silicone emulsion release agent prepared by the traditional method—that is, hydroxyl silicone emulsion + coupling agent, etc., has a slow curing speed. , poor demoulding ability and other defects; compound polymer substances that can cross-link with hydroxyemulsion, such as polymethylhydrogensiloxane (also known as hydrogen-containing silicone oil), or hydrogen-containing polysiloxane resin and hydroxyemulsion Used together, it can improve the film-forming property of the hydroxyl silicone emulsion release agent and improve the release effect

Method used

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  • Organic fluorosilicone emulsion release agent and preparation method thereof
  • Organic fluorosilicone emulsion release agent and preparation method thereof
  • Organic fluorosilicone emulsion release agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Synthesis of precursor carboxysilane CSi-1 solution

[0037] According to the molar ratio of aliphatic dibasic acid anhydride (DA) and γ-aminopropylsilane (APS) about 1:1, weigh 0.1 mol, about 9.8 g maleic anhydride (MA), 0.1 mol, about 22.14 g γ-amine Propyl triethoxysilane (KH-550) and about 50% by mass of (MA+KH-550), 15.97g propylene glycol dimethyl ether (DMP) solvent, MA was first heated and dissolved into a transparent state, and then Stir, heat and heat up to 70 ° C, then add KH-550 to react for 2 h to obtain a light yellow transparent liquid, that is, the structural formula is (C 2 H 5 O) 3 SiC 3 H 6 The solution of carboxyhydrocarbylsilane (referred to as carboxysilane, CSi-1) of NHCOCH=CHCOOH has a silane content of about 66.67 wt %.

[0038] (2) Preparation of intermediate carboxyl hydrocarbon group / trifluoropropyl modified polysiloxane CFS-1 emulsion

[0039] Press D 4 :D 3 F : The mass ratio of CSi solution is about 30:70:5, take 30.0gD in tur...

Embodiment 2

[0045] (1) Synthesis of precursor carboxysilane CSi-2 solution

[0046] According to the molar ratio of aliphatic dibasic acid anhydride (DA) and γ-aminopropylsilane (APS) about 1:1, weigh 0.1mol, 10.0g succinic anhydride (SA), 0.1mol, about 19.13g γ-aminopropylsilane Methyldiethoxysilane (APMDES) and 100% by mass of (SA+APMDES), about 29.13g propylene glycol methyl ether acetate solvent (PMA), first dissolve SA with solvent to make it transparent, stir and heat up To 125 ℃, add APMDES to stir and react for 4h to obtain a light brown transparent liquid, that is, the structural formula is (C 2 H 5 O) 2 SiMeC 3 H 6 NHCOCH 2 CH 2 The carboxyhydrocarbylsilane of COOH (referred to as carboxysilane, CSi-2) solution has a silane content of about 50 wt%.

[0047] (2) Preparation of intermediate carboxyl hydrocarbon group / trifluoropropyl modified polysiloxane CFS-2 emulsion

[0048] Press D 4 :D 3 F : The mass ratio of CSi-2 solution is about 50:50:20, take 50.0gD in turn 4...

Embodiment 3

[0054] (1) Synthesis of precursor carboxysilane CSi-3 solution

[0055] According to the molar ratio of aliphatic dibasic acid anhydride (DA) and γ-aminopropylsilane (APS) about 1:1, sequentially weigh 0.1mol, about 9.8g MA, 0.1mol, about 17.93g γ-aminopropyltrimethoxy Silane (KH-540) and about 70% by mass of (MA+KH-540), 19.41g of ethylene glycol dimethyl ether solvent, the MA was first heated and dissolved in the solvent into a transparent state, and then stirred and heated to 70 ℃, then add KH-540 to stir and react for 2h to get a light yellow transparent liquid, that is, the structural formula is (CH 3 O) 3 SiC 3 H 6 The carboxyhydrocarbylsilane (abbreviated as carboxysilane, CSi-3) solution of NHCOCH=CHCOOH has a silane content of about 58.82 wt %.

[0056] (2) Preparation of intermediate carboxyl hydrocarbon group / trifluoropropyl modified polysiloxane CFS-3 emulsion

[0057] Press D 4 :D 3 F : The mass ratio of CSi-3 solution is about 40:60:10, take 40.0g D in tu...

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Abstract

The invention relates to an organic fluorosilicone emulsion release agent, which is prepared by the following steps: carrying out copolymerization on carboxyl alkyl silane, octamethylcyclotetrasiloxane and 1, 3, 5-tri (trifluoropropyl)-1, 3, 5-trimethylcyclotrisiloxane in a water-phase emulsion to synthesize a carboxyl alkyl / trifluoropropyl modified polysiloxane emulsion, and then carrying out cross-linking reaction on macromolecular trifluoropropyl hydrogen-containing polysiloxane. Under the action of a catalyst, the surface of a mold is coated with the fluorosilicone emulsion release agent, then curing is conducted at the temperature of 120-150 DEG C, the release agent can be cross-linked and cured on the surface of the mold to form a compact fluorosilicone coating, and due to the surface tendency, enrichment and hydrophobic and oleophobic effects of trifluoropropyl groups in the coating, the release agent has the good release effect on the surface of the mold. The coating can also endow a treated mold with a good demolding effect and easy stripping performance of a product, so that the mold treated by the mold release agent can enable a tire product to obtain a smooth and bright and clean appearance without adhesion or surface pollution under the condition that the demolding times n is less than or equal to 40-83.

Description

technical field [0001] The invention belongs to the field of functional auxiliary agents, and in particular relates to a preparation method of a water-based organic fluorosilicon emulsion mold release agent for rubber tire mold release and the application of the agent in tire mold release treatment. Background technique [0002] Mold release agent, that is, a class of additives that cure on the surface of the mold, can effectively isolate the mold and the product, prevent the product from adhering to the surface of the mold and make it easy to peel. In terms of characteristics, the surface tension of the main component of the release agent is generally low (γ is about 17-23N / m), and the release layer formed after curing is mostly chemically inert; the release agent does not chemically react with the product. Or corrode the mold, and must have good heat resistance, and can provide the processed product to be demolded with a smooth and beautiful appearance without causing poll...

Claims

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Application Information

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IPC IPC(8): C08G77/44B29C33/62
CPCC08G77/44B29C33/62
Inventor 陈天翔孙成宏
Owner FENGHUA HUIHONG ORGANOSILICON CHEM
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