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Releasing agent for plastics

A release agent and plastic technology, applied in the field of organopolysiloxane emulsion composition, can solve the problems of molded body cracks, uneven coating, cracks, etc., and achieve the effect of good storage stability and excellent wettability

Pending Publication Date: 2021-12-28
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the emulsion is applied to plastics in a state where gelling or oil flotation occurs, uneven wetting will occur, causing plastics to stick to each other or uneven appearance
[0007] In addition, if the emulsion of organopolysiloxane containing a large amount of nonionic surfactant is coated on plastic, the following problems sometimes arise: cracks are generated due to impregnation of the nonionic surfactant in the plastic, and molded articles Cracks in
Since the emulsion of Patent Document 10 diluted 50 times with water has a high surface tension (25°C) of 45 dyne / cm or more and does not contain anionic surfactants, it may have poor wettability when coated on plastic And uneven coating (crawling)

Method used

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  • Releasing agent for plastics
  • Releasing agent for plastics

Examples

Experimental program
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preparation example Construction

[0131] [Preparation of composition]

[0132]An example of a specific production method of the release agent for plastics of the present invention is mainly shown below.

[0133] (A) organopolysiloxane, (B) anionic surfactant, (C) polyoxyethylene alkyl ether, (D) polyoxyethylene sorbitan fatty acid ester, (F) sorbose After a part of alcohol anhydride fatty acid ester and (E) water was stirred and emulsified, it diluted with the remaining (E) water. When the (A) component is not easily emulsified, it can be easily emulsified by adding a part of each of (A) to (D) components, (F) component and a part of (E) component and stirring, adding The remaining (A) - (D) components and (F) components are further stirred. Especially when the viscosity of component (A) is less than 1,000mm 2 / s, (A) component may be difficult to emulsify. In such a case, emulsification can be easily performed by adding (A)-(D) component and (F) component in portions. A specific example of an emulsified ...

Embodiment 1

[0146] [chemical formula 9]

[0147]

[0148] 30 parts by mass (90 g) of (A) component [1] organopolysiloxane (1a) represented by the above formula was stirred with HOMO DISPER MODEL 2.5 (manufactured by PRIMIX Corporation) at 500 rpm (L1 is about 550, viscosity is 10,000 mm 2 / s), 0.2 parts by mass (0.6g) of (B) component [1] EMAL 270J (manufactured by Kao Corporation, 70% aqueous solution of polyoxyethylene alkyl ether sodium sulfate), 6.0 parts by mass (18g) of (C) Component [1] LEOCOL TDN90-80 (2a) (manufactured by Lion Specialty Chemicals Co., Ltd., 80% aqueous solution of polyoxyethylene alkyl ether), 1.6 parts by mass (4.8 g) of (D) component [1] NONION LT -221 (manufactured by NOF CORPORATION, polyoxyethylene sorbitan monolaurate), 0.4 parts by mass (1.2 g) of (F) component NONION LP-20R (manufactured by NOF CORPORATION, sorbitan monolaurate) And 1.5 mass parts (4.5g) of water as (E)-1 component, after emulsifying the whole, stir with 1,500rpm for 20 minutes, then...

Embodiment 2

[0150] 30 parts by mass (90 g) of (A) component [1] organopolysiloxane (1a) (L1 is about 550, viscosity is 10,000 mm 2 / s), 1.3 parts by mass (3.9g) of (B) component [1] EMAL 270J (manufactured by Kao Corporation, 70% aqueous solution of polyoxyethylene alkyl ether sodium sulfate), 6.0 parts by mass (18g) of (C) Component [1] LEOCOL TDN90-80 (2a) (manufactured by Lion Specialty Chemicals Co., Ltd., 80% aqueous solution of polyoxyethylene alkyl ether), 1.6 parts by mass (4.8 g) of (D) component [1] NONIONLT- 221 (manufactured by NOF CORPORATION, polyoxyethylene sorbitan monolaurate), 0.4 parts by mass (1.2 g) of (F) component NONION LP-20R (manufactured by NOF CORPORATION, sorbitan monolaurate) and 1.0 parts by mass (3.0g) of water as component (E)-1 was emulsified as a whole, stirred at 1,500rpm for 20 minutes, then 59.55 parts by mass (178.65g) of water as component (E)-2 was added, and used HOMO MIXER MARKII MODEL 2.5 (manufactured by PRIMIX Corporation) was stirred at 1,50...

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Abstract

This releasing agent for plastics is characterized by containing components (A)-(E) and having an average particle diameter of 200 nm or less. Accordingly, a releasing agent for plastics, that has excellent dilution stability and mechanical stability, that has good wettability, and that is an organo-polysiloxane emulsion in which cracks are unlikely to occur with respect to plastics, is provided. (A) 100 parts by mass of an organo-polysiloxane having a viscosity of 100-100,000 mm2 / s at 25 DEG C. (B) 0.1-15.0 parts by mass of one or more types of anionic surfactants. (C) 1.0-30.0 parts by mass of a polyoxyethylene alkyl ether. (D) 0.5-15.0 parts by mass of a polyoxyethylene sorbitan fatty acid ester. (E) 50-100,000 parts by mass of water.

Description

technical field [0001] The invention relates to a release agent for plastics, which is an emulsion composition of organopolysiloxane. Background technique [0002] From the point of view of freshness or hygiene, food is sold in a protected form with plastic trays, sheets, films, etc. According to the type of food and the storage temperature, various plastics for food containers and packaging such as PET, PP, and PS are used. [0003] In the manufacturing process of plastics for food container packaging, it is formed into a sheet or film and then wound into a roll. Typically, a release agent is applied to the surface of the sheet or film when it is wound on a roll so that the sheet or film does not adhere to each other. [0004] In addition, molded products such as boxes, trays, and cups obtained by molding sheets or films are stacked and stored, and if a mold release agent is applied to them, they can be removed one by one smoothly without sticking . [0005] From the vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/64
CPCB29C33/64C08L83/04C08J7/0427C08J2367/02C08J2483/04C08L71/02C08G77/16C08G77/12C08G77/04C08K5/1545C08L71/08
Inventor 安藤有子生方早央里多和田华子
Owner SHIN ETSU CHEM CO LTD