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Polyurethane type oil-resistant sealant as well as preparation method and application thereof

A polyurethane and sealant technology, applied in the field of sealants, can solve problems such as inability to overcome component migration, and achieve the effects of promoting good compatibility, reducing mobility and enhancing stability

Active Publication Date: 2018-09-04
JIANGSU JINHOU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the solid content of polyurethane sealants has been increased and volatile solvents and other small molecular substances have been reduced, it still cannot overcome the disadvantage of component migration when it comes into contact with food

Method used

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  • Polyurethane type oil-resistant sealant as well as preparation method and application thereof
  • Polyurethane type oil-resistant sealant as well as preparation method and application thereof
  • Polyurethane type oil-resistant sealant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In this embodiment, the raw materials for the preparation of polyurethane oil-resistant sealant include the following components by weight:

[0043]

[0044] Wherein, the diisocyanate is a mixture of dimethyl biphenyl diisocyanate and p-phenylene diisocyanate with a mass ratio of 1:3, the silane coupling agent is a hexaalkoxysilane coupling agent, and the chain extender is 1,3 -Propylene glycol, the catalyst is dibutyltin dioctoate, and the antioxidant is antioxidant 264.

[0045] The preparation method comprises the following steps:

[0046] (1) Mix polyether polyol, diisocyanate, hydroxyl-terminated polyfluorosiloxane, chain extender, catalyst and antioxidant, and mix them under the condition of stirring at a speed of 90r / min at 80°C and a vacuum of -0.2kPa Vacuum dehydration under pressure, and then react at 120°C for 5h;

[0047] (2) Mix the product of step (1) with nitrile rubber, polyvinyl chloride, heavy calcium carbonate, dimethyl silicone oil and silane coup...

Embodiment 2

[0049] In this embodiment, the raw materials for the preparation of polyurethane oil-resistant sealant include the following components by weight:

[0050]

[0051] Wherein, the diisocyanate is a mixture of dimethyl biphenyl diisocyanate and p-phenylene diisocyanate with a mass ratio of 1:1, the silane coupling agent is a hexaalkoxysilane coupling agent, and the chain extender is ethylene glycol , the catalyst is dibutyltin laurate, and the antioxidant is antioxidant 1010.

[0052] The preparation method comprises the following steps:

[0053] (1) Mix polyether polyol, diisocyanate, hydroxyl-terminated polyfluorosiloxane, chain extender, catalyst and antioxidant, and mix them under a stirring condition of 100r / min at 90°C and a vacuum of -0.1kPa Vacuum dehydration under pressure, and then react at 130°C for 6h;

[0054] (2) Mix the product of step (1) with nitrile rubber, polyvinyl chloride, heavy calcium carbonate, simethicone oil and silane coupling agent, banbury at 80...

Embodiment 3

[0056] In this embodiment, the raw materials for the preparation of polyurethane oil-resistant sealant include the following components by weight:

[0057]

[0058] Wherein, the diisocyanate is a mixture of dimethyl biphenyl diisocyanate and p-phenylene diisocyanate with a mass ratio of 1:2, the silane coupling agent is a hexaalkoxysilane coupling agent, and the chain extender is 1,4 -butanediol, the catalyst is dibutyltin dioctoate, and the antioxidant is antioxidant TPP.

[0059] The preparation method comprises the following steps:

[0060] (1) Mix polyether polyol, diisocyanate, hydroxyl-terminated polyfluorosiloxane, chain extender, catalyst and antioxidant, and mix them under a stirring condition of 120r / min at 70°C and a vacuum of -0.3kPa Vacuum dehydration under pressure, and then react at 140°C for 3h;

[0061] (2) Mix the product of step (1) with nitrile rubber, polyvinyl chloride, heavy calcium carbonate, dimethyl silicone oil and silane coupling agent, banbury...

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Abstract

The invention provides a polyurethane type oil-resistant sealant as well as a preparation method and the application thereof. The polyurethane type oil-resistant sealant comprises the following preparation raw materials in parts by weight: 80 to 90 parts of polyether polyol, 20 to 40 parts of diisocyanate, 15 to 20 parts of nitrile rubber, 10 to 20 parts of polyvinyl chloride, 10 to 20 parts of hydroxyl terminated polyfluorosiloxane, 5 to 10 parts of heavy calcium carbonate, 3 to 5 parts of simethicone, 3 to 8 parts of a silane coupling agent, 1 to 4 parts of a chain extender, 1 to 3 parts ofa catalyst and 1 to 3 parts of ab antioxidant. The polyurethane type oil-resistant sealant provided by the invention has high oil resistance and hydrolysis resistance, has high stability, serves as afood filling sealant, has low migration rate when being contacted with food and meets the European and American food hygiene requirements.

Description

technical field [0001] The invention belongs to the technical field of sealants, and relates to a polyurethane type oil-resistant sealant and its preparation method and application. Background technique [0002] Polyurethane sealant is a sealant mainly composed of polyurethane rubber and polyurethane prepolymer. This type of sealant has high tensile strength, excellent elasticity, abrasion resistance, oil resistance and cold resistance, and is widely used in buildings, highways, automobile manufacturing, glass installation, sheet sealing, etc. However, it also has some defects, such as storage stability is greatly affected by packaging and external influences, contains volatile solvents, and the solid content is not enough, and when it is used in food packaging such as metal bottle cap sealants, there will be high mobility and safety. risk. [0003] With the development of science and technology and the strengthening of people's awareness of environmental protection and he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/04C09J109/02C09J127/06C09J11/08C09J11/04C09J11/06C09K3/10C08G18/76C08G18/66C08G18/65C08G18/61C08G18/48C08G18/32
CPCC08G18/3206C08G18/4009C08G18/48C08G18/61C08G18/6511C08G18/6674C08G18/721C08G18/7614C08G18/7685C08G2190/00C08K2003/265C08L2205/035C09J11/04C09J11/06C09J11/08C09J175/04C09J175/08C09K3/1021C09K2003/109C08L9/02C08L27/06C08L83/04C08K3/26
Inventor 王衍萍魏朝升朱琳王家玟蔡丽雪王晖
Owner JIANGSU JINHOU NEW MATERIAL TECH CO LTD
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