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polyisoprene condom

A polyisoprene, condom technology, applied in male contraceptives, transportation and packaging, surgery, etc., can solve problems such as adverse effects on physical properties

Active Publication Date: 2011-12-28
LRC PROD LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We have now found that even very low levels of prevulcanization can have a significant detrimental effect on the physical properties of the prepared product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] A typical recipe is as follows:

[0097]

[0098]

[0099] 1 parts per hundred rubber

[0100] 2 Cetyl Stearate / Ethylene Oxide Condensate

[0101] Sodium 3-alkylbenzene sulfonate

[0102] 4 Aqueous dispersion of by-products of p-cresol and dicyclopentadiene butylation reaction

Embodiment 2

[0104] A specific example of the formulation according to Example 1 is as follows:

[0105]

[0106] 1 parts per hundred rubber

[0107] 2 Cetyl Stearate / Ethylene Oxide Condensate

[0108] Sodium 3-alkylbenzene sulfonate

[0109] 4 Aqueous dispersion of by-products of p-cresol and dicyclopentadiene butylation reaction

Embodiment 3

[0111] A preferred production process is as follows:

[0112] 1. Cool the synthetic polyisoprene latex to 15°C ± 2°C before compounding it with the ingredients in Example 1.

[0113] 2. Store the compounded synthetic polyisoprene latex at 15°C±2°C for 24-48 hours until the desired PRM value is reached.

[0114] 3. The synthetic polyisoprene latex was then transferred to a storage tank and kept at 15°C ± 2°C.

[0115] 4. Then transfer the synthetic polyisoprene latex to the dipping tank and start product dipping as soon as possible to avoid further curing; the latex in the tank is kept at a temperature of <15°C.

[0116] 5. After the first dip, pass the dipped mold and the film on it through a drying oven.

[0117] 6. The dip mold and the film on it are then passed through a refrigeration unit to cool the dip mold to 15°C ± 2°C so as not to heat the latex in the second dip tank.

[0118] 7. After the second dipping, the film on the dipped mandrel is dried and vulcanized at a...

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PUM

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Abstract

The invention relates to a method for preparing synthetic polyisoprene latex and synthetic polyisoprene condom. A method of making a compounded synthetic polyisoprene latex suitable for making latex films comprising (a) compounding the synthetic polyisoprene latex with suitable compounding ingredients, (b) curing the latex, and optionally (c) storing the latex; characterized in that steps (a), (b) and optionally (c) are carried out at low temperature so as to minimize pre-vulcanization of the latex. Condoms can be made from latex made according to the process of the invention.

Description

technical field [0001] The present invention relates to a process for the preparation of synthetic polyisoprene latex and synthetic polyisoprene condoms, and condoms obtained by said process. Background technique [0002] Natural rubber mainly includes cis-1,4-polyisoprene, which has been widely used as a material for forming dip-moulded articles such as surgical gloves, balloons, condoms , and similar. However, products formed from natural latex have been associated with a number of health problems. Some users have allergic reactions or other adverse reactions (such as irritant dermatitis) to natural rubber (more specifically, to proteins remaining in natural rubber, or chemicals added to promote film curing), which can lead to Painful or uncomfortable symptoms. [0003] Various synthetic elastomers have been used as substitutes for natural rubber. Elastomer materials such as nitrile or neoprene have been used in the production of shell gloves and examination gloves. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/20C08L9/10C08J5/02A61F6/04B29C41/00A61B19/04
CPCC08J3/241C08K5/39C08C1/02C08K5/0025C08C1/00A61F6/04C08J2309/10B29C41/003C08J5/02C08J2309/06C08J2307/02Y10T428/2852C08L9/10C08J3/20C08J3/26
Inventor J·A·阿特里尔M·J·巴拉德E·阿尔萨法
Owner LRC PROD LTD