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Method for removing foreign flavor of silicon rubber products

A technology of silicone rubber and thermally vulcanized silicone rubber, which is applied in the field of eliminating the peculiar smell of silicone rubber products and silicone rubber products vulcanized by organic peroxide vulcanizing agents. It can solve the problems of inability to eliminate odors, pungent and unpleasant odors, etc. Sexual Odor Effects

Active Publication Date: 2012-04-04
江苏强盛功能化学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although PMBP also has the characteristics of hot air vulcanization at normal pressure without generating bubbles, high strength and good transparency of vulcanized silicone rubber products, in the actual application process, the decomposition products of small molecules formed after the decomposition of PMBP will produce surprising Difficult to get used to pungent, unpleasant odor that cannot be eliminated to the desired level even after prolonged post-vulcanization
In addition, since the thermal decomposition temperature of PMBP is about 30°C higher than that of bis(2,4-dichlorobenzoyl peroxide), the traditional vulcanizing agent referred to as DCBP, it needs to be used as an accelerator in the vulcanization process. Organic amines are used to bring the smell of amines to silicone rubber products

Method used

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  • Method for removing foreign flavor of silicon rubber products
  • Method for removing foreign flavor of silicon rubber products

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Add 16 g of β-cyclodextrin to the kneader, 400 g of hydroxyl-terminated polydimethylsiloxane with a molecular weight of 3400, and 2000 g of 50% p-toluyl peroxide, mix well, and grind evenly to obtain a paste Shaped composite vulcanizing agent finished product. Take 10Kg of thermally vulcanized silicone rubber, add 200g of the above-mentioned pasty compound vulcanizing agent finished product, and knead evenly on an open mill. The compounded rubber is often vulcanized by hot air, the temperature of the tunnel oven is 300°C, and the residence time of the extruded rubber hose in the oven is 45s. Squeeze Hose is completely odorless.

Embodiment 2

[0023] Add 40g of α-cyclodextrin to the kneader, 300g of hydroxyl-terminated dimethyl vinyl polysiloxane with a molecular weight of 2800, and 2000g of 50% o-toluyl peroxide, mix well, and grind evenly , to obtain the finished product of pasty compound vulcanizing agent. Take 10Kg of hot vulcanized silicone rubber, add 150g of the above-mentioned pasty compound vulcanizing agent finished product, mix evenly on an open mill, add 10g of cetyl secondary amine paste accelerator with a content of 20%, and mix evenly again. The compounded rubber is often vulcanized by hot air, the temperature of the tunnel oven is 300°C, and the residence time of the extruded rubber hose in the oven is 45s. Squeeze Hose is completely odorless.

Embodiment 3

[0025] Add 60g of γ-cyclodextrin to the kneader, 160g of hydroxyl-terminated dimethylmethylphenylpolysiloxane with a molecular weight of 2000, 2000g of 50% p-methoxybenzoyl peroxide, mix well, and grind Evenly, the finished product of pasty compound vulcanizing agent is obtained. Take 10Kg of thermally vulcanized silicone rubber, add 120g of the above-mentioned pasty compound vulcanizing agent finished product, mix evenly on an open mill, add 10g of cetyl secondary amine paste accelerator with a content of 20%, and mix evenly again. The compounded rubber is often vulcanized by hot air, the temperature of the tunnel oven is 300°C, and the residence time of the extruded rubber hose in the oven is 45s. Squeeze Hose is completely odorless.

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Abstract

A method for eliminating peculiar smell silicone rubber product, which belongs to the filed of silicone rubber product technology and comprises the following steps: uniformly grinding hydroxyl-terminated polysiloxane, cyclodextrin and organic peroxide vulcanizing agent to obtain a paste-shape composite vulcanization deodorant, adding the paste-shape composite vulcanization deodorant into hot vulcanized silicone rubber, milling uniformly, and vulcanizing by hot air under normal pressure to obtain a hot vulcanized silicone rubber product without peculiar smell. The method can effectively removethe strong irritating peculiar smell of the silicone rubber product vulcanized by organic peroxide, thus achieving environment protection and providing the technical support for the wide application of novel halogen-free vulcanizing agents such as methyl-phenacyl organic peroxides and methoxy-benzoyl organic peroxides.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber products, in particular to a method for eliminating the peculiar smell of silicone rubber products, which is suitable for silicone rubber products vulcanized by organic peroxide vulcanizing agents. Background technique [0002] With the enhancement of social awareness of environmental protection, new halogen-free vulcanizing agents have attracted more and more attention. Among them, the toluyl peroxide represented by p-toluyl peroxide (abbreviation: PMBP) It is favored by the industry and has a good application prospect. However, although PMBP also has the characteristics of hot air vulcanization at normal pressure without generating bubbles, high strength and good transparency of vulcanized silicone rubber products, in the actual application process, the decomposition products of small molecules formed after the decomposition of PMBP will produce surprising Difficult to get used to punge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/20C08J3/24C08L83/04C08L83/06C08L5/16C08K5/14
Inventor 应立曹俊锋应志耀
Owner 江苏强盛功能化学股份有限公司
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