Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of oxidized-starch-containing high-toughness polyurethane sealing gasket material

A technology of oxidized starch and sealing gaskets, which is applied in the field of gasket materials, can solve the problems of poor corrosion resistance and wear resistance of sealing gaskets, weak toughness of carboxylated nitrile latex, and short service life, etc. The effect of easy control of conditions, light weight and simple method

Inactive Publication Date: 2018-05-08
ANHU WUHU CHANGJIANG JACK UP EQUIP CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this sealing gasket material adopts carboxylated nitrile latex as raw material, because the toughness of carboxylated nitrile latex is not strong, it is neither corrosion-resistant nor wear-resistant, and the sealing gasket produced is corrosion-resistant and wear-resistant are not good, so the service life is not long

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] A preparation method containing oxidized starch high-toughness polyurethane sealing gasket material, comprising the following steps:

[0019] (1) After mixing 8 parts by weight of starch and 40 parts by weight of water at 30°C to make a starch paste, add 3 parts by weight of sodium metaphosphate and 0.8 parts by weight of potassium permanganate aqueous solution, and react in a water bath at 75°C for 3 hours to obtain oxidized starch solution;

[0020] (2) After immersing 3 parts by weight of graphene in concentrated sulfuric acid and heating for 12 hours, take it out and filter and wash 5 times with distilled water to obtain graphene sulfide. Alkenes were mixed, and stirred continuously at 65°C for 2 hours to obtain a uniform mixed solution for use;

[0021] (3) After drying and dehydrating 27 parts by weight of polycarbonate diol for 18 hours, slowly add 23 parts of diphenylmethane diisocyanate, and 0.08 parts by weight of dibutyltin dilaurate, and react at 83°C for 1...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of an oxidized-starch-containing high-toughness polyurethane sealing gasket material. The starch is prepared into starch paste; then, oxidization is performed by sodium metaphosphate and potassium permanganate water solution; obtained materials, vulcanized graphene and aramid fiber form compounds; polycarbonate diol and iso-diphenyl methane diisocyanateare used as major synthesis raw materials; after the synthesis of the crosslinked waterborne polyurethane prepolymers, the crosslinked waterborne polyurethane prepolymers, plasticizers and auxiliaryagents are simultaneously mixed, cooled and shaped, and are then granulated. The prepared sealing gasket material has the advantages of high toughness, light weight and the like. The method for preparing the gasket material is simple; the process conditions can be easily controlled.

Description

technical field [0001] The invention relates to a gasket material, in particular to a preparation method of a high-toughness polyurethane sealing gasket material containing oxidized starch. Background technique [0002] As a thermoplastic polymer, polycarbonate can be simply divided into aliphatic, aromatic and other categories, and has a wide range of applications in automobiles, construction, electrical appliances and other industries. Because of its non-toxic, transparent, and good corrosion resistance, it is also used in daily life, such as safety glass, CD-ROM and other materials. [0003] Gasket seals are the most common form of static sealing for industrial devices, so gasket seals are one of the most widely used accessories in industrial production. The number of seals used by general industrial production enterprises is thousands, and for large-scale petrochemical, electric power and other enterprises, the number is tens of thousands, and leakage is the most common...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L75/04C08L3/10C08L77/10C08K9/10C08K9/02C08K3/04C08K5/12
CPCC08L75/04C08L2205/03C08L2205/16C08L3/10C08L77/10C08K9/10C08K9/02C08K3/04C08K5/12
Inventor 苗则波
Owner ANHU WUHU CHANGJIANG JACK UP EQUIP CO LTD