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A kind of preparation method of plastic rubber with adjustable viscosity

A viscous and rubber technology, applied in the field of plastic rubber preparation, can solve the problems of oil leakage, poor hardness, easy to break products, etc., and achieve the effect of easy operation process, low manufacturing cost and reduced tensile strength

Active Publication Date: 2021-01-19
LZ STATIONERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rubber prepared by this method may appear in two situations according to the different proportions. The first situation is that when the rubber content is high, the product has high toughness and retains a certain rubber elasticity, high tensile strength, and is difficult to remove during use. A small amount of plastic rubber (kneading to modify the small picture area); the second case is that when the filler content is high, the product is easy to break, the hardness is high, and the hand feel is poor. Oil

Method used

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  • A kind of preparation method of plastic rubber with adjustable viscosity
  • A kind of preparation method of plastic rubber with adjustable viscosity
  • A kind of preparation method of plastic rubber with adjustable viscosity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] Preparation of Plastic Rubber A Take 100 parts of butyl rubber and 60 parts of white oil (4006) into a kneader or closed rubber mixer, heat to 100°C and let stand for 1 hour, turn on mechanical stirring, and continuously add pure white under heating conditions 10 parts of zinc stearate, 260 parts of hollow glass microspheres, 10 parts of pumice powder, continue stirring until all raw materials are evenly mixed, then add 2 parts of acrylic paint, anti-aging agent 2,2,4-trimethyl-1,2 - 1 part of dihydroquinoline polymer, continue to stir for 1 hour and then cool and stand still for 1 hour to obtain a soft and moderately tough plastic rubber product. The product will not deform or leak oil when it is left standing (incubator or refrigerator) at 5°C, 20°C, 25°C, 30°C and 35°C for two months. At ML(1 + 4) 100°C, the Mooney viscosity is 55±2, and the density (26-27°C) is about 0.81 g / cm3.

Embodiment example 2

[0029] Preparation of Plastic Rubber B Take 100 parts of butyl rubber and 80 parts of No. 150 paraffin oil, add them to a kneader or a closed rubber mixer, heat to 100°C and let stand for 1 hour, turn on mechanical stirring, and continuously add pure white 10 parts of zinc stearate, 300 parts of hollow glass microspheres, continue to stir until all raw materials are evenly mixed, then add 2 parts of acrylic paint, anti-aging agent 2,2,4-trimethyl-1,2-dihydroquinoline polymerization 1 part of body, 5 parts of stearic acid, continue to stir for 1 hour and then cool and stand still for 1 hour to obtain soft and moderate toughness plastic rubber products. The product will not deform or leak oil when it is left standing (incubator or refrigerator) at 5°C, 20°C, 25°C, 30°C and 35°C for two months. At ML(1 + 4) 100°C, the Mooney viscosity is 57±2, and the density (26-27°C) is about 0.82 g / cm3.

Embodiment example 3

[0031] Preparation of plastic rubber C Take 100 parts of polyisobutylene with a molecular weight of about 1 million, 80 parts of No. 300 paraffin oil, add it to a kneader or a closed rubber mixer, heat it to 100°C and let it stand for 1 hour, turn on mechanical stirring, and continue under heating conditions. Add 100 parts of pure white zinc stearate, 250 parts of hollow glass microspheres, 50 parts of pumice powder, continue stirring until all raw materials are evenly mixed, then add 2 parts of acrylic paint, anti-aging agent 2,2,4-trimethyl- 1 part of 1,2-dihydroquinoline polymer, continued to stir for 1 hour, then cooled and stood still for 1 hour to obtain a soft and moderately tough plastic rubber product. The product will not deform or leak oil when it is left standing (incubator or refrigerator) at 5°C, 20°C, 25°C, 30°C and 35°C for two months. At ML(1 + 4) 100°C, the Mooney viscosity is 42±2, and the density (26-27°C) is about 0.94 g / cm3.

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Abstract

The invention relates to a preparation method of kneadable eraser with adjustable viscidity. The method comprises the following steps: adding a thermoplastic elastomer and mineral oil into a kneader or an internal rubber mixer, vacuuming and heating up to 80-150 DEG C, and then standing; after the thermoplastic elastomer is softened, starting mechanical stirring, then continuously adding an additive, and continuing to stir until all the raw materials are uniformly mixed; then, adding light filler, and stirring until the light filler is evenly dispersed in a mixing system so as to obtain a mixture with a uniform color; then, standing, opening a vacuum valve and transferring the mixture into extrusion molding equipment, and carrying out extrusion processing at the room temperature so as to obtain the kneadable eraser with the adjustable viscidity. The eraser is light in mass, soft and not sticky, is foamed by stretching and is spongy, and is especially suitable for lightening handwritingin art drawings. Products with different softness, density and viscosity can be obtained by adjusting the raw materials and ratio. The kneadable eraser is soft, easy to form and convenient to use, the raw materials are easy to purchase, the technological process is safe and environmentally-friendly, and the equipment requirements are low, so that the kneadable eraser is wide in market.

Description

technical field [0001] The invention relates to a preparation method of an art product, in particular to a preparation method of a plastic rubber with adjustable viscosity and excellent use and processing performance. Background technique [0002] The plastic eraser is an important art drawing tool, mainly used to lighten the dark areas in the painting process, and play a role in making the transition between black, white and gray more natural, that is, helping to adjust the transition surface. High-quality plastic rubber should have the following characteristics: soft and plastic, good sticky buoyancy, no fading, no sticky hands, no residue, moderate toughness, low elasticity, stretch foaming in a spongy shape, easy processing, and moderate tensile strength , It has good stability in the ambient temperature range of daily use. [0003] The relatively mature preparation methods that have been disclosed at present mainly include the following two types. One type uses polyvin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/22C08L9/00C08L23/20C08L91/06C08K7/28C08K5/098C08K7/26C08K5/3437
CPCC08L9/00C08L23/20C08L23/22C08L91/06C08K7/28C08K5/098C08K7/26C08K5/3437
Inventor 徐亮志
Owner LZ STATIONERY