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Modified polyurethane material, non-stick powder polyurethane mold and preparation method

A technology of polyurethane material and polyurethane prepolymer, which is applied in the field of fluorinated graphite modified polyurethane material and its preparation, non-sticky powder polyurethane mold and its preparation, which can solve the problems of powder sticking to the mold, achieve less preparation steps and reduce production Cost, the effect of strong application prospects

Active Publication Date: 2019-09-17
SOUTHWESTERN INST OF PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is the powder sticking problem existing in the use process of the polyurethane mold for ceramic wall and floor tiles, and further provides a kind of fluorinated graphite modified polyurethane material and its preparation method, and provides the use of the fluorinated graphite modified Preparation method of polyurethane material Preparation method of non-stick powder polyurethane mold for polyurethane layer and non-stick powder polyurethane mold

Method used

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  • Modified polyurethane material, non-stick powder polyurethane mold and preparation method

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preparation example Construction

[0028] The preparation method of graphite fluoride modified polyurethane material of the present invention specifically comprises the following steps:

[0029] S01: the step of performing a prepolymerization reaction to generate a polyurethane prepolymer;

[0030] S02: the step of performing chain extension and modification reaction on the generated polyurethane prepolymer

[0031] Mixing the polyurethane prepolymer with the chain extender and fluorinated graphite evenly to carry out chain extension and modification reactions;

[0032] S03: vulcanizing the reactant obtained in step S02 to obtain a fluorinated graphite modified polyurethane material.

[0033] Due to the characteristics of fluorinated graphite itself, adding an appropriate amount of fluorinated graphite can reduce the mold sticking of polyurethane molds to a certain extent. In order to achieve a better effect, the inventors conducted further research.

[0034] In the present invention, fluorinated graphite and...

Embodiment 1

[0047] Put 100 parts of polyether polyol in a three-necked flask equipped with a thermometer, a stirrer and a vacuum adapter, keep the vacuum at 0.08-0.09Mpa, vacuum dehydrate at about 100°C for 2 hours, stop vacuuming; then lower the temperature of the materials in the reaction kettle At about 50°C, add 16 parts of toluene diisocyanate and 23 parts of diphenylmethane diisocyanate, raise the temperature to 80°C and keep warm for polymerization reaction for 1 hour, then start the vacuum device to defoam, and obtain free isocyanate group-NCO polyurethane prepolymer .

[0048] Take 1 part of fluorinated graphite and add it to the methanol solution and stir at a constant speed for 2 hours to disperse the fluorinated graphite evenly in methanol to prepare a 1.5 mg / mL suspension; then add 14 parts of chain extender (MOCA) to the suspension , continue to stir for 2h, and make methanol suspension of graphite fluoride / chain extender;

[0049] Mix the methanol suspension of polyurethan...

Embodiment 2

[0052] Put 100 parts of polyether polyol in a three-necked flask equipped with a thermometer, a stirrer and a vacuum adapter, keep the vacuum at 0.08-0.09Mpa, vacuum dehydrate at about 110°C for 2 hours, stop vacuuming; then lower the temperature of the materials in the reaction kettle At about 50°C, add 17 parts of toluene diisocyanate and 25 parts of diphenylmethane diisocyanate, raise the temperature to 80°C and keep warm for polymerization reaction for 1 hour, then start the vacuum device to defoam, and obtain a polyurethane prepolymer containing free isocyanate groups.

[0053] Take 2 parts of fluorinated graphite and add it to the methanol solution and stir at a constant speed for 2 hours to disperse the fluorinated graphite evenly in methanol to prepare a 2.5 mg / mL suspension; then add 16 parts of chain extender (MOCA) to the suspension , continue to stir for 2h, and make methanol suspension of graphite fluoride / chain extender;

[0054] Mix the above-mentioned polyureth...

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Abstract

The invention discloses a preparation method of a carbon monofluoride modified polyurethane material. The preparation method comprises the following steps of S01, performing a prepolymefization reaction to generate a polyurethane prepolymer; S02, performing chain extension and modification reaction on the generated polyurethane prepolymer; uniformly mixing the polyurethane prepolymer, a chain extender and carbon monofluoride to perform chain extension and modification reactions; S03, vulcanizing reactants in the step S02 to obtain the carbon monofluoride modified polyurethane material. The invention also discloses a powder-adhesion-free polyurethane mold for preparing a polyurethane layer by the preparation method and a preparation method of the powder-adhesion-free polyurethane mold. A carbon monofluoride / polyurethane composite material prepared by the preparation method of the carbon monofluoride modified polyurethane material has good heat resistant performance and mechanical performance, and also has excellent surface performance and hydrophobic performance; the number of mold wiping times of wall floor tile enterprises can be obviously reduced; the production efficiency and the use efficiency are improved; the production cost is reduced.

Description

technical field [0001] The present invention relates to the technical field of polyurethane elastomer materials, in particular to a fluorinated graphite modified polyurethane material and a preparation method thereof, and the present invention also relates to ceramic wall and floor tiles prepared by adopting the above-mentioned preparation method of fluorinated graphite modified polyurethane material to prepare a polyurethane layer A non-stick powder polyurethane mold used by enterprises and a preparation method thereof. Background technique [0002] The ceramic wall and floor tile mold requires that under a certain temperature and humidity, the mold can withstand the alternating action of vertical impact force and horizontal push force. The mold needs to have high strength and good wear resistance. Cracks and degumming. Polyurethane can be used as a mold material for ceramic wall and floor tiles because of its good wear resistance, tensile strength and certain elasticity. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08J3/24C08G18/76C08G18/66C08G18/48C08G18/10C08K3/04
Inventor 常兰李海龙李源郦文忠程精涛
Owner SOUTHWESTERN INST OF PHYSICS