CN109971409B - Polyurethane sealant and application thereof - Google Patents
Polyurethane sealant and application thereof Download PDFInfo
- Publication number
- CN109971409B CN109971409B CN201910257888.XA CN201910257888A CN109971409B CN 109971409 B CN109971409 B CN 109971409B CN 201910257888 A CN201910257888 A CN 201910257888A CN 109971409 B CN109971409 B CN 109971409B
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- CN
- China
- Prior art keywords
- parts
- polyurethane
- sealant
- plasticizer
- polyurethane sealant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a polyurethane sealant, which is prepared from the following raw materials: 60-90 parts of polyurethane, 40-70 parts of liquid butyl rubber, 20-60 parts of plasticizer, 20-30 parts of carbon black, 10-15 parts of octyl phenolic vulcanized resin, 2-5 parts of silane coupling agent, 1-5 parts of 4-tert-butyl catechol and 0-20 parts of filling material. The polyurethane has strong adhesive force, the liquid butyl rubber has good fluidity, and carbon black, a plasticizer and the like are used as auxiliary materials, so that the lubricating effect is improved, the weather resistance of the sealant is improved, and the sealant has good stability in cold and hot alternate circulation and severe cold at day and night.
Description
Technical Field
The invention relates to a sealant, in particular to a polyurethane sealant and application thereof.
Background
The sealing glue is a sealing material which deforms along with the shape of a sealing surface, is not easy to flow and has certain cohesiveness, and is used for filling a configured gap to play a role in sealing. According to different use occasions, the sealant is required to have the performances of leakage prevention, water prevention, vibration prevention, electric conduction and the like.
The sealant is prepared by taking dry or non-dry sticky substances such as asphalt, resin, rubber and the like as base materials, matching with inert fillers such as talcum powder, argil, carbon black, titanium dioxide, asbestos and the like, and then adding a plasticizer, a solvent, a curing agent, an accelerant and the like, and is widely applied to the fields of buildings, transportation, sealing of electronic instruments and parts and the like.
As described above, the sealant can be classified into resins, rubbers, mixed polymers and natural polymers according to the base material thereof. According to different application ranges, the material can be divided into heat-resistant type, cold-resistant type, pressure-resistant type, water-resistant type, corrosion-resistant type and the like. In general, structural sealants and non-structural sealants can be classified according to strength.
The electric energy is the main energy of the current society, China mainly takes coal-fired power generation as the main energy, but the environment pollution is caused by insufficient coal consumption, so that in recent years, China also popularizes a clean power generation technology, wherein the wind power generation technology has wide application prospect, and is an ideal place for wind power generation especially in the western regions of a vast range.
However, the inner Mongolia and the northwest of China are long in winter, the lowest temperature reaches-40 ℃, and the wind generating set is subjected to more severe requirements. The service life of the fan sealing element is related to the working stability of the generator set, and the fan sealing element is required to have higher stability in severe cold and severe heat.
Although ordinary nitrile rubber adopted in the text (rubber industry, 9.2012) can meet the requirement of low temperature resistance, in practical application, the nitrile rubber is unsaturated rubber, so that the nitrile rubber is easy to age and harden and cannot meet the requirement of long service life.
Therefore, it is very necessary to develop a rubber material containing a solid self-lubricating material to ensure that abrasion does not occur even when dry friction or shaft hardness is not removed.
Disclosure of Invention
The invention provides a polyurethane sealant.
The polyurethane sealant is prepared from the following raw materials in parts by weight:
wherein, the silane coupling agent is selected from one or two of vinyltriethoxysilane and vinyltris (β -methoxyethoxy) silane.
Further, the monomer of the polyurethane includes polytetrahydrofuran.
Further, the prepolymer obtained in the polyurethane preparation process is a polyether polyurethane prepolymer.
Further, the plasticizer is adipic acid polyester.
Further, the filling material is diatomite or talcum powder.
The sealant disclosed by the invention is prepared by reasonably adjusting the components on the basis of the prior art to obtain a product with good stability, and the preparation method of the sealant is the same as the process of the conventional polyurethane sealant and can be prepared by adopting the conventional mature process, so that the production cost is low, the technical barrier is small, and the sealant can be applied to horses quickly and gains income.
The invention also provides application of the sealant, and particularly relates to the sealant which can be applied to a rotating shaft of a generator set.
The sealant provided by the invention takes polyurethane and liquid butyl rubber as base materials, controls the content of the polyurethane and the liquid butyl rubber, takes the polyurethane with good adhesive force as a main component, utilizes the good fluidity of the liquid butyl rubber, can be uniformly spread on the surface of a rotating shaft of a generator set, is supplemented with carbon black, a plasticizer, a filler and the like, improves the weather resistance of the sealant while improving the lubricating effect, and has good stability in cold and hot alternate circulation and severe cold at day and night. Through laboratory cold and hot cycle tests, the sealant provided by the invention meets the severe environmental requirements in northwest regions.
Detailed Description
The following are specific embodiments of the present invention for the purpose of illustration and description.
Example 1
The polyurethane sealant is prepared from the following raw materials in parts by weight:
example 2
The polyurethane sealant is prepared from the following raw materials in parts by weight:
example 3
The sealant as in example 2 was applied to a genset rotating shaft. After 500 cycles at-40 deg.C to 40 deg.C under laboratory conditions, the sealant was tested for its performance as shown in the following table.
The above table confirms that the mechanical properties of the sealant obtained by the invention have no obvious change after 500 cycles, namely the sealant is proved to have good stability in the high-low temperature alternating cycle process.
Claims (4)
1. The polyurethane sealant is characterized by being prepared from the following raw materials in parts by weight:
wherein, the silane coupling agent is selected from one or two of vinyl triethoxysilane and vinyl tri (β -methoxyethoxy) silane;
the monomers of the polyurethane include polytetrahydrofuran;
the plasticizer is adipic acid polyester.
2. The polyurethane sealant according to claim 1, wherein the prepolymer obtained during the polyurethane preparation process is a polyether polyurethane prepolymer.
3. The polyurethane sealant according to claim 1, wherein the filler is diatomaceous earth or talc.
4. Use of a polyurethane sealant according to any one of claims 1 to 3 in rotating shafts of generator units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257888.XA CN109971409B (en) | 2019-04-01 | 2019-04-01 | Polyurethane sealant and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257888.XA CN109971409B (en) | 2019-04-01 | 2019-04-01 | Polyurethane sealant and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109971409A CN109971409A (en) | 2019-07-05 |
| CN109971409B true CN109971409B (en) | 2020-05-19 |
Family
ID=67082199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910257888.XA Active CN109971409B (en) | 2019-04-01 | 2019-04-01 | Polyurethane sealant and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109971409B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075103C (en) * | 1998-09-21 | 2001-11-21 | 深圳市奥博胶粘剂化工有限公司 | Polyurethane adhesives/sealant composition, precursor and preparation process thereof |
| US7914895B2 (en) * | 2007-05-24 | 2011-03-29 | H.B. Fuller Company | Moisture curable hot melt adhesive composition |
| CN102863926B (en) * | 2012-10-16 | 2014-03-26 | 上海电缆研究所 | Conductive sealant and application thereof |
| CN104694065B (en) * | 2015-04-01 | 2016-08-31 | 成都硅宝科技股份有限公司 | Automobile silicane-modified polyurethane fluid sealant and preparation method thereof |
| CN108559424A (en) * | 2018-05-14 | 2018-09-21 | 合肥学院 | A kind of diatomite modified fluid sealant and preparation method thereof |
-
2019
- 2019-04-01 CN CN201910257888.XA patent/CN109971409B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109971409A (en) | 2019-07-05 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200423 Address after: 362801 Fusheng Road, Nanshan District, petrochemical park, Quangang District, Quanzhou City, Fujian Province Applicant after: Quanzhou Xinhua Fu synthetic material Co., Ltd Address before: 530000 Mingshi Pavilion 829 Shunbin Environmental Protection and Chemical Office, Huaxing Times Square, No. 4 Xinmin Road, Qingxiu District, Nanning City, Guangxi Zhuang Autonomous Region Applicant before: Zhang Mingdong |
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| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |