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Modified polyvinyl chloride door seal and preparation method thereof

A technology of polyvinyl chloride and polyvinyl chloride resin, applied in the field of modified polyvinyl chloride door seals and its preparation, can solve the problems of easy yellowing of polyurethane elastomers, failure to meet the aging performance requirements of electrical plastic parts, etc., and achieve good Anti-aging yellowing performance, avoiding the growth of bacteria and mold, good compatibility

Inactive Publication Date: 2016-05-04
QINGDAO NEW MATERIAL TECH IND PARK DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermoplastic polyurethane elastomer produced by diphenylmethane diisocyanate is easy to yellow and cannot meet the aging performance requirements of electrical plastic parts
However, the application field of this patent is in the field of artificial leather, and the processing method is mixing with an internal mixer and forming with a calender, which is different from door seals that need to be extruded.

Method used

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  • Modified polyvinyl chloride door seal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The modified polyvinyl chloride door seal of this embodiment includes the following components in parts by weight: 40 parts of polyvinyl chloride resin powder, 15 parts of anti-yellowing thermoplastic elastomer, cyclohexane 1,2-dicarboxylic acid diiso 5 parts of nonyl ester (DINCH), 20 parts of trioctyl trimellitate (TOTM), 5 parts of dioctyl adipate (DOA), 5 parts of epoxy soybean oil, 10 parts of polyester oligomer, filler 10 parts, 1 part of stabilizer, 3 parts of compatibilizer, 1 part of lubricant, 0.1 part of pigment;

[0036] Anti-yellowing thermoplastic elastomers include, by weight, 30 parts of polybutylene adipate polyol (molecular weight 1000), 30 parts of polyoxypropylene polyol (molecular weight 1000), hexamethylene diisocyanate (HDI ) 10 parts, isophorone diisocyanate 30 parts, butanediol 10 parts;

[0037] The stabilizer is calcium / zinc composite stabilizer, the lubricant is stearic acid and erucamide, the compatibilizer is halogenated polyethylene, and ...

Embodiment 2

[0045] The modified polyvinyl chloride door seal of the present embodiment comprises the following components in parts by weight: 50 parts of polyvinyl chloride resin powder, 5 parts of anti-yellowing thermoplastic elastomer, 5 parts of trioctyl trimellitate (TOTM) 10 parts of epoxy soybean oil, 5 parts of polyester oligomer, 15 parts of filler, 3 parts of stabilizer, 1 part of compatibilizer, 3 parts of lubricant, 1 part of pigment;

[0046] The anti-yellowing thermoplastic elastomer includes, by weight, 12 parts of polyethylene adipate polyol (molecular weight: 1000), 48 parts of polytetrahydrofuran ether polyol (molecular weight: 1000), and 10 parts of dicyclohexylmethane diisocyanate , 30 parts of isophorone diisocyanate, 10 parts of ethylenediamine;

[0047] The stabilizer is calcium / zinc composite stabilizer, the lubricant is oleic acid amide, low molecular weight polytetrafluoroethylene, the compatibilizer is ethylene-vinyl acetate grafted maleic anhydride (EVA-g-MAH), ...

Embodiment 3

[0054] The modified polyvinyl chloride door seal of this embodiment includes the following components in parts by weight: 45 parts of polyvinyl chloride resin powder, 10 parts of anti-yellowing thermoplastic elastomer, cyclohexane 1,2-dicarboxylic acid diiso 3 parts of nonyl ester (DINCH), 10 parts of trioctyl trimellitate (TOTM), 3 parts of dioctyl adipate (DOA), 8 parts of epoxy soybean oil, 8 parts of polyester oligomer, filler 10 parts, 1 part of stabilizer, 3 parts of compatibilizer, 1 part of lubricant, 0.5 part of pigment;

[0055] The anti-yellowing thermoplastic elastomer includes by weight parts: 30 parts of polycaprolactone polyol (molecular weight 1000), 30 parts of polycarbonate polyol (molecular weight 1000), 20 parts of hexamethylene diisocyanate (HDI), 20 parts of isophorone diisocyanate, 10 parts of butylene glycol;

[0056] The stabilizer is calcium / zinc composite stabilizer, the lubricant is stearic acid and erucamide, the compatibilizer is halogenated poly...

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Abstract

The invention belongs to the technical field of door seal materials, and relates to a modified polyvinyl chloride door seal and a preparation method thereof. The door seal is prepared from, by weight, 40-50 parts of polyvinyl chloride resin powder, 5-15 parts of anti-yellowing thermoplastic elastomer, 0-5 parts of 1,2-cyclohexane dicarboxylic acid di-isononyl ester, 5-20 parts of trioctyl trimellitate, 0-5 parts of dioctyl adipate, 5-10 parts of epoxidized soybean oil, 5-10 parts of polyester oligomer, 10-15 parts of filler, 1-3 parts of a stabilizer, 1-3 parts of a compatilizer, 1-3 parts of a lubricating agent and 0.1-1 part of pigment. Fat diisocyanate is two of hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HMDI). The defects that the hardness of a traditional soft PVC door seal is sharply increased at low temperature and elasticity becomes poor are overcome, the tensile strength and the breaking elongation of the door seal are improved, the welding angle pull force of the door seal is increased, and the service life of the door seal is prolonged.

Description

technical field [0001] The invention belongs to the technical field of door seal materials, and in particular relates to a modified polyvinyl chloride door seal used for refrigerators, freezers, wine cabinets and other refrigeration appliances and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) has many advantages in terms of mechanical properties, solvent resistance, oil resistance, transparency, etc., making it widely used in many fields, such as the opening and closing of refrigeration appliances such as refrigerators, freezers, and wine cabinets. The required door seal material, that is, the commonly referred to as door seal, is generally produced by soft PVC with a hardness of 60-75 ShoreA. However, the currently used PVC door seals have problems such as plasticizer migration, poor cold resistance, and poor thermal stability. The migration of plasticizers can easily lead to the loss of elasticity of door seals, poor sealing performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L75/08C08L67/00C08K13/02C08K5/12C08K5/1515C08K3/26C08K3/34C08G18/66C08G18/42C08G18/48C08G18/44C08G18/32
CPCC08L27/06C08G18/3206C08G18/3228C08G18/4018C08G18/42C08G18/44C08G18/48C08G18/6618C08G18/664C08L2201/08C08L2205/035
Inventor 杨有财梁坤高雷刘以亭岳超刚李荣勋
Owner QINGDAO NEW MATERIAL TECH IND PARK DEV
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