CN105367799B - A kind of modified polyorganosiloxane room temperature vulcanized silicone rubber - Google Patents
A kind of modified polyorganosiloxane room temperature vulcanized silicone rubber Download PDFInfo
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- CN105367799B CN105367799B CN201510956629.8A CN201510956629A CN105367799B CN 105367799 B CN105367799 B CN 105367799B CN 201510956629 A CN201510956629 A CN 201510956629A CN 105367799 B CN105367799 B CN 105367799B
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- room temperature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
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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
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
- C09J183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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Abstract
The present invention relates to a kind of modified polyorganosiloxane room temperature vulcanized silicone rubbers.The sulphurated siliastic is made of following components in parts by weight：Modified polyorganosiloxane 25 80, filler 0 50, white carbon 0 10, ketimide 0.1 4, catalyst 0.1 4, tackifier 0.1 4, other 0 0.3.The room temperature vulcanization improves its adhesive property by epoxy-modified polysiloxane, expands silicon rubber in the application range in bonding field, can be applied to the fields such as adhesive, conformal laminated adhesive and casting glue.
Description
Technical field
The present invention relates to polymeric material fields, and in particular to a kind of polysiloxanes room temperature vulcanized silicone rubber.
Background technology
Silicon rubber is that a kind of strand has both inorganic and organic nature macromolecular material, is had unique comprehensive
Can, such as high-low temperature resistant, low pressure compression set, hydrophobicity, weatherability, cold resistance and the ozone aging resistance of the diaphragm etc..Due to silicon rubber strand
The reason of structure, keeps it very low to the adhesion strength of material, to make the use of silicon rubber be very limited.Usually improve room
The temperature vulcanizable silicone rubber method low to the adhesive property of material has：One, by coating silane coupling agent or coupling agent.Two, it selects novel
Crosslinking agent improves adhesive property, and three, pass through the methods of the selection of various fillers.
And there is hydroxyl, ehter bond and active epoxy group in the structure of epoxy resin so that the molecule and base of epoxy resin
Material interface generates electromagnetic adsorption or chemical bond, especially epoxy group the generation cross-linked polymeric generation network under curing agent effect and divides greatly
Son improves molecule cohesive force itself, and therefore, epoxy resin adhesive has most metals and nonmetallic materials good viscous
Knot property.
The method for improving silicon rubber cohesive force at present is mainly solved by adding Cucumber, rather than from molecular backbone
Consider.This is because silicon rubber molecular backbone does not almost influence the improvement of adhesive property.But if by will be functional
Group is introduced into silicon rubber molecular backbone, then can improve the interaction of silicon rubber molecular backbone and bonding substrates, to carry
The adhesive property of high silicon rubber.
Invention content
For the above-mentioned prior art the problem of, the object of the present invention is to provide a kind of polysiloxanes of modification and by
Its room temperature vulcanized silicone rubber prepared, the room temperature vulcanized silicone rubber can adapt to a variety of different substrate materials bondings, have excellent drawing
Cut intensity.
For achieving the above object, the present invention provides following technical solutions：
A kind of modified polyorganosiloxane containing epoxy group alkoxy, the modified polyorganosiloxane have the following structure formula：
In the structure：R1：For C1-C20Straight chain or branched paraffin；
R2：For methyl, ethyl, methoxyl group, one or both of ethyoxyl；
R3：For substituted or non-substituted aliphatic, alicyclic, aromatic series；
R4：For 2,3- glycidoxies, one or both of 3,4- 7-oxa-bicyclo[4.1.0 bases.
The preparation method of the modified polyorganosiloxane is as follows：By the silane coupling agent containing epoxy group, hydroxy silicon oil and catalysis
Agent is added in reaction kettle, is heated to 175-185 DEG C, preferable temperature is 180 DEG C, is stirred under vacuum 0.2-5 hours, reaction finishes
Afterwards, discharging, the ratio between the hydroxyl of the hydroxy silicon oil and the molal quantity of silane coupling agent containing epoxy group are 1:1.1-5
The catalyst alkalinity or acidic catalyst, such as one kind in sodium hydroxide, phosphoric acid, dioctylphosphoric acid ester, dosage is other raw materials
The 0.001-0.1% of total weight.The viscosity of the hydroxy silicon oil be 100-100000cps, preferably 500-30000cps, it is described
Silane coupling agent containing epoxy group is 3- (the third oxygen of 2,3- epoxies) propyl trimethoxy silicane, 3- (the third oxygen of 2,3- epoxies) propyl
Triethoxysilane, 3- (the third oxygen of 2,3- epoxies) propyldimethoxy-silane, 3- (the third oxygen of 2,3- epoxies) propyl diethoxy silicon
One or both of alkane and 2- (3,4- 7-oxa-bicyclo[4.1.0s base) ethyl trimethoxy silane.
A kind of room temperature vulcanized silicone rubber prepared by above-mentioned modified polyorganosiloxane, the silicon rubber have as follows in parts by weight
Composition：
Preferably：
The filler is calcium carbonate, aluminium hydroxide, magnesium hydroxide, silicon powder, talcum powder, one kind of bentonite etc. or mixing
Object；The white carbon be fume colloidal silica, precipitated silica；
The ketimide is ethylenediamine ketimide, hexamethylene diamine ketimide, diethylenetriamine ketimide, benzophenone imine etc.
One kind or mixture of ketimide；
The catalyst is titanate esters, such as tetraisopropyl titanate, tetrabutyl titanate, four tert-butyl ester of metatitanic acid, can also be
Titanium chelate, as diisopropoxy ethyl diacetoacetate titanium, two isobutoxy ethyl diacetoacetate titaniums, and octanoic acid are sub-
One kind or mixture of the catalyst such as tin, dibutyl tin laurate；
The tackifier are silane coupling agents, such as TSL 8330, aminopropyltriethoxywerene werene,
Aminoethyl amino propyl trimethoxy silane, aminoethylaminopropyl triethoxysilane, glycidyl ether oxygen propyl trimethoxy silicon
Alkane, glycidoxypropyltrietandysilane andysilane, isocyanate group propyl trimethoxy silicane, isocyanate group triethoxy
Silane, phenyl amino trimethoxy silane, one kind of phenyl amino triethoxysilane or mixture.It is described it is other be mill base,
Pigment, levelling agent, one or more mixtures in antifoaming agent.
Advantages of the present invention and effect are：The room temperature vulcanized silicone rubber uses epoxy-modified polysiloxane, can be substantially
Improve its adhesive property, tensile strength is up to 1.6MPa, and elongation at break is up to 280%.Silicon rubber is expanded by above-mentioned improvement
Application range in bonding field, can be applied to the fields such as adhesive, conformal laminated adhesive and casting glue, has a vast market
Application prospect.
Specific implementation mode
The present invention will be further described with embodiment With reference to embodiment.
First, three kinds of modified polyorganosiloxane raw materials are prepared.
Modified polyorganosiloxane A
To being mounted in the reaction kettle of thermometer, agitator, condenser, 100 parts of the hydroxy silicon oil of viscosity 700cps is added,
3- (2,3- the third oxygen of epoxy) 4 parts of propyl trimethoxy silicane, 0.2 part of phosphoric acid stir one hour under vacuum, and it is 850cps to obtain viscosity
Reactant.
Modified polyorganosiloxane B
To being mounted in the reaction kettle of thermometer, blender, condenser, the hydroxy silicon oil 100 of viscosity 5000cps is added
Part, 2- (3,4- 7-oxa-bicyclo[4.1.0 base) 4 parts of ethyl trimethoxy silane, 0.2 part of phosphoric acid stirs one hour under vacuum, obtains viscosity
For the reactant of 6000cps.
Modified polyorganosiloxane C
To being mounted in the reaction kettle of thermometer, blender, condenser, 100 parts of the hydroxy silicon oil that viscosity is 20000 is added
3- (2,3- the third oxygen of epoxy) 4 parts of propyl trimethoxy silicane, phosphoric acid 0.2 stir one hour under vacuum, and it is 22000cps to obtain viscosity
Reactant.
The room temperature vulcanization of the invention containing modified polyorganosiloxane is prepared according to the common process method for preparing sulphurated siliastic
Silicon rubber, component (by weight percentage) used and test result are referring to table 1.
Table 1
From above-described embodiment as can be seen that the room temperature vulcanized silicone rubber energy being prepared by modified polysiloxanes is added
Its adhesive property is enough greatly improved, tensile strength is up to 1.6MPa, and up to 280%, tensile-sbear strength relatively uses not to be changed elongation at break
Property hydroxy silicon oil greatly improve compared to having, the performance of the ketimide component silicone rubber after compounding is especially added it is further preferred that.It should
Silicon rubber can be applied to the fields such as adhesive, conformal laminated adhesive and casting glue in the application range in bonding field, have wide
Market application prospect.
Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention
It encloses.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (5)
1. a kind of room temperature vulcanized silicone rubber prepared by modified polyorganosiloxane, which is characterized in that in parts by weight, composition
For：
The preparation method of the modified polyorganosiloxane is as follows：By the silane coupling agent containing epoxy group, hydroxy silicon oil and second is urged
Agent is added in reaction kettle, is heated to 175-185 DEG C, is stirred under vacuum 0.2-5 hours, after completion of the reaction, discharging, institute
The ratio between hydroxyl and the molal quantity of silane coupling agent containing epoxy group for stating hydroxy silicon oil are 1:1.1-5, second catalyst
For alkalinity or acidic catalyst, dosage is the 0.001-0.1% of other raw material gross weights；
Second catalyst is one kind in sodium hydroxide, phosphoric acid, dioctylphosphoric acid ester, and the viscosity of the hydroxy silicon oil is 100-
100000cps, the silane coupling agent containing epoxy group be 3- (2,3- the third oxygen of epoxy) propyldimethoxy-silane, 3- (2,
The third oxygen of 3- epoxies) one kind or two in propyl diethoxy silane and 2- (3,4- 7-oxa-bicyclo[4.1.0s base) ethyl trimethoxy silane
Kind；
The filler is one or more of calcium carbonate, aluminium hydroxide, magnesium hydroxide, silicon powder, talcum powder and bentonite；
First catalyst is a kind of or several in titanate esters, titanium chelate, stannous octoate, dibutyl tin laurate
Kind；
The tackifier are TSL 8330, aminopropyltriethoxywerene werene, aminoethylaminopropyl front three
Oxysilane, aminoethylaminopropyl triethoxysilane, glycidyl ether oxygen propyl trimethoxy silicane, glycidyl ether oxygen third
Ethyl triethoxy silicane alkane, isocyanate group propyl trimethoxy silicane, isocyanate group triethoxysilane, phenyl amino front three
The one or more of oxysilane, phenyl amino triethoxysilane.
2. room temperature vulcanized silicone rubber according to claim 1, which is characterized in that by weight, consisting of：
3. room temperature vulcanized silicone rubber according to claim 1, which is characterized in that the white carbon be fume colloidal silica,
Precipitated silica；
The ketimide is one in ethylenediamine ketimide, hexamethylene diamine ketimide, diethylenetriamine ketimide, benzophenone imine
Kind is several；
Other auxiliary agents are mill base, levelling agent, one or more of antifoaming agent.
4. room temperature vulcanized silicone rubber according to claim 1, which is characterized in that the titanate esters be tetraisopropyl titanate,
One or more of tetrabutyl titanate, four tert-butyl ester of metatitanic acid；
The titanium chelate is one in diisopropoxy ethyl diacetoacetate titanium, two isobutoxy ethyl diacetoacetate titaniums
Kind or two kinds.
5. room temperature vulcanized silicone rubber according to claim 1, which is characterized in that the silane coupling agent containing epoxy group
For 3- (the third oxygen of 2,3- epoxies) propyl trimethoxy silicane, 3- (the third oxygen of 2,3- epoxies) propyl-triethoxysilicanes and 2- (3,4-
One or both of 7-oxa-bicyclo[4.1.0 base) ethyl trimethoxy silane.
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| CN106753173B (en) * | 2016-12-15 | 2020-05-01 | 佛山市顺德区国精合成材料有限公司 | Preparation method of modified water-based polyurethane pressure-sensitive adhesive |
| CN110194933B (en) * | 2019-07-02 | 2022-02-25 | 杭州之江新材料有限公司 | Primer for silane modified adhesive and preparation method thereof |
| CN111117481B (en) * | 2019-12-31 | 2021-10-22 | 江苏微上新材料科技有限公司 | Addition type organic silicon liquid coating material and preparation method and application thereof |
| CN111171716A (en) * | 2019-12-31 | 2020-05-19 | 江苏微上新材料科技有限公司 | Epoxy silicone rubber coating material and preparation method and application thereof |
| CN112126349A (en) * | 2020-09-29 | 2020-12-25 | 中国科学院兰州化学物理研究所 | Polysiloxane long-acting lubricating protective coating with space environment resistance |
| CN112210068A (en) * | 2020-10-19 | 2021-01-12 | 肇庆市武大环境技术研究院 | Moisture-curable modified polysiloxane, and preparation method and application thereof |
| CN116178694B (en) * | 2021-11-26 | 2024-08-20 | 万华化学（宁波）容威聚氨酯有限公司 | Amino polyether polyol and preparation method thereof, and polyurethane rigid foam and preparation method thereof |
| CN116477878A (en) * | 2022-01-13 | 2023-07-25 | 万华化学集团股份有限公司 | Fertilizer slow-release organic silicon composite flowerpot and preparation method thereof |
| CN116462848A (en) * | 2023-03-21 | 2023-07-21 | 江西宏柏新材料股份有限公司 | Preparation method of filler slow-release modifier |
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| CN102703023B (en) * | 2012-06-05 | 2013-07-31 | 烟台德邦先进硅材料有限公司 | Adhesive and compounding method thereof |
| CN103102687B (en) * | 2012-07-17 | 2015-04-08 | 广州市白云化工实业有限公司 | One-component room curing sealing material and preparation method thereof |
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