CN103342979A - One-component room-temperature curing silicone composition with storage stability - Google Patents
One-component room-temperature curing silicone composition with storage stability Download PDFInfo
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- CN103342979A CN103342979A CN2013103206143A CN201310320614A CN103342979A CN 103342979 A CN103342979 A CN 103342979A CN 2013103206143 A CN2013103206143 A CN 2013103206143A CN 201310320614 A CN201310320614 A CN 201310320614A CN 103342979 A CN103342979 A CN 103342979A
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Abstract
The invention provides a one-component room-temperature curing silicone composition with storage stability. The organosilicone sealant has better long-term storage stability and physical stability such as viscosity and extrudability and also has better curing properties during ageing. The room-temperature curing organosilicone sealant comprises the following components: (1) one or more silicon-hydroxyl terminated polydiorganosiloxanes, (2) at least one oximido containing organosilicone or organosiloxane, (3) at least one catalyst capable of catalyzing the crosslinking reaction (curing) of the room-temperature curing organosilicone sealant, and (4) an aminopropyl oximido organosilicone, wherein the oximido containing organosilicone or organosiloxane serves as a crosslinking agent, and the aminopropyl oximido organosilicone serves as an additive. The invention also provides a process for preparing the room-temperature curing silicone composition. The obtained one-component room-temperature curing system has high curing speed and good bonding properties and also has more excellent storage stability and aging properties.
Description
Technical field
The present invention relates to a kind of seal gum, more specifically relate to a kind of self-vulcanizing organosilicon sealant with single-component of storage-stable.
Background technology
The silicone sealant of self-vulcanizing is widely used in numerous areas because of its excellent weather resistance, such as building be sealing adhesive, the encapsulation of electronic material embedding and automobile mechanical packing ring and solar cell panel assembly etc.; The curing of single-component silicone fluid sealant is from outward appearance to inner essence, and the speed of curing not only depends on the speed of response of linking agent, more depends on the speed of water in air part infiltration.According to the linking agent that the uses kind that removes thing and the different in kind that remove through hydrolytic condensation, its organosilicon sealant system can be divided into neutral gum again, Aci-Jel etc., wherein the oxime type single-component self-vulcanizing system of taking off in the neutral gum is because it is in workability, curing performance, adhesiveproperties, the performance of aspect excellences such as mechanical property, and be applied in the various industries; And take off oxime type self-vulcanizing silica gel for single-component, and product comprises in the production before using, and transportation, in the storage process, resistance to overturning is vital;
In taking off oxime type single-component self-vulcanizing silicone adhesive, contain various ingredients, inevitably moisture is brought in the system, and in storage process, also has the infiltration of moisture.The existence of moisture will make the stability of whole system have a greatly reduced quality, the hydrolysis of its meeting initiating activity group, and then cause the molecular chain condensation cross-linking, system viscosity rises.Thereby often need in system, add a large amount of water-retaining agents;
In addition, generally, organo-tin compound is used in the self-vulcanizing silicone adhesive as condensation catalyst; But these tin compounds simultaneously can catalysis not be wished the side reaction that takes place yet, cause the fracture of polymerizable organosilicon molecular chain under the effect of alcohol, finally can form the low activity organopolysiloxane segment that replaces with alkoxyl group, reduce even lose reactive behavior, lose crosslinked ability, influence is solidified;
Comprise for the currently known methods that increases single-component silicone fluid sealant system storage stability:
In single-component self-vulcanizing system, add excessive linking agent or water-retaining agent; But too much the use of water-retaining agent can cause the slow of system curing, and the change of cross-linked form also is disadvantageous from cost;
US Patent No. 4417042 has been described a kind of scavenging agent for single-component dealcoholization-type self-vulcanizing organosilicon system, and this scavenging agent is the compound with silazine link, for example hexamethyldisilazane; Because its high relatively reactive behavior, this silicon-nitrogen compound can react with water or alcohol, thereby reaches the effect that makes that system is stable; But this kind silicon-nitrogen compound is the cost height not only, and can the infringement system solidify and adhesiveproperties;
In another kind is attempted, US Patent No. 5286892 has been described a kind of compound that will have 2-alkoxyl group silication propionic ester structure and has been used for dealcoholized cold curing silicone system as the hydroxyl scavenging agent, this compound can reach the purpose of eliminating alcohol with the alcoholic extract hydroxyl group reaction, thereby improves storage property and the aging resistance of integral system; But fundamentally do not reduce or eliminate the existence of alkoxyl group, also can introduce other organic molecules in addition and produce as by product;
In addition, the use of minimizing or alternative organotin catalysts is also attempted in system, and for example in US Patent No. 3334067, the catalyzer that the inner complex of titanium or aluminium is used as curing reaction uses, but when its catalytic effect descends, also can cause the problem of xanthochromia.And other organic titanate class catalyzer, for example describe among the patent EP747443, can cause the instability that contains based on the organosilicon system viscosity of hydroxy-end capped polysiloxane, and because its susceptibility to organic amine, the general sticking power additive based on the amido organosilane is limited therewith to use; And the consumption that reduces organotin catalysts can influence the effect that system is solidified;
This has just required a kind of oxime type single-component self-vulcanizing organosilicon system of taking off, when can have identical curing performance, have higher storage and stability to aging, comprise that composition producing and transporting system physicals in the storage, comprises viscosity, the stability of performances such as outward appearance, also comprise simultaneously the stability of its curing performance in the storage weathering process, comprise its surface drying, skinning, crosslinked, the stability of performances such as curing.
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Summary of the invention
The objective of the invention is to propose a kind of single-component self-vulcanizing organosilicon combination of storage-stable, utilize this kind composition when not changing its curing performance, to improve storage and the stability to aging of system.
For thought purpose of the present invention, following technical scheme is proposed:
A kind of storage-stable single-component moisture-curable silicon composition, described composition is made of following component by weight:
Hydroxy-end capped organopolysiloxane A 15%～90%;
Crosslinking agent B 0.5% ~ 10%;
Catalyzer C 0.01%～5%;
Amine propyl group oximino silane D 0.1～5%;
Additive E; Wherein,
Described hydroxy-end capped poly-organopolysiloxane A is expressed as HO-(SiR
8R
9-O)
nH,, wherein n makes the integer of its viscosity between 1000 to 500000 centipoises, R
8With R
9Can be selected from unit price hydrocarbon group and unit price halogenation alkyl respectively;
Described crosslinking agent B is the organic ketoximinosilanes that contains a plurality of oximidos, is expressed as R
nSi (ON=CR
2R
3)
4-n, wherein, R is independently selected from the alkyl of C1-C10, the thiazolinyl of C2-C10, the cycloalkyl of C3-C8 or the aryl of C6-C14, R at every turn when occurring
2And R
3Be independently selected from the alkyl of C1-C10 when occurring at every turn; N is that 0, m is 1,2 or 3; Perhaps n is that 1, m is 1 or 2;
Described amine propyl group oximino silane D can be expressed as R
4 bH
2-bNC
3H
6Si (X)
a(Y)
3-a, wherein, R
4By the saturated or unsaturated alkyl of 1 to 20 straight chain that carbon is formed, side chain or ring-type, aryl, or contain this kind alkyl, the aryl of other substituted radicals; Substituent X is alkoxy grp: be expressed as-OR
5, R wherein
5By 1 to 6 alkane that carbon is formed; Substituting group Y is the oximido group: be expressed as-ONC(R
6) (R
7) R wherein
6, R
7Be identical or different by 1 to 10 alkane that carbon is formed; Wherein a and b are 0 to 2 integers;
Described additive E is one or more of Paris white, white carbon black, silicon powder, carbon black or aluminum oxide.
This of described other substituted radicals kind of alkyl, aryl be for containing amino, and epoxy group(ing) is acrylate-based, sulfydryl, ester group, this kind alkyl that the ethers group replaces, aryl; Described R
5Be methyl, ethyl, propyl group, sec.-propyl, butyl, isobutyl-or the tertiary butyl.
Described oximido group comprises the acetone oximido, methyl ethyl ketone oximido, methyl propyl ketone oximido, methyl butyl ketone oximido or mibk oximido.
In the expression formula of described hydroxy-end capped poly-organopolysiloxane A, R
8With R
9Can be selected from methyl, ethyl, vinyl or phenyl respectively.
The organo-tin compound of described catalyzer C is selected from dibutyl tin dilaurate, dibutyl tin acetate or dioctyl two lauric acid tin.
The consumption of described crosslinking agent B is 2% to 5%, and the consumption of described catalyzer C is 0.03% to 1%, and the consumption of described amine propyl group oximino silane D is 0.5%～3%.
The consumption of described catalyzer C is 0% to 1%, and the consumption of described amine propyl group oximino silane D is 1%～2%.
Described crosslinking agent B is alkoxyl group-ketoximinosilanes, is expressed as R
n-Si (OR
1)
m(ON=CR
2R
3)
4-n-m, wherein, R is independently selected from the alkyl of C1-C10, the thiazolinyl of C2-C10, the cycloalkyl of C3-C8 or the aryl of C6-C14 at every turn when occurring; R
1, R
2And R
3Be independently selected from the alkyl of C1-C10 when occurring at every turn; N is that 0, m is 1,2 or 3; Perhaps n is that 1, m is 1 or 2.
The oxime type single-component self-vulcanizing organosilicon system of taking off that this patent proposes, can be when having the curing performance identical with traditional system, can have higher storage and stability to aging, comprise composition produce and the transportation storage in system physicals stable, comprise viscosity, the stability of performances such as outward appearance, also comprise simultaneously the stability of its curing performance in the storage weathering process, comprise its surface drying, skinning, crosslinked, performances such as curing.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, the present invention is described in more detail.Per-cent in following examples all is weight percentage;
Comparison example,
Hydroxy-end capped polydimethylsiloxane (107 glue, 20,000 centipoises) 11.88%, hydroxy-end capped polydimethylsiloxane (107 glue, 40,000 centipoises) 34.64%, the polydimethyl siloxane fluid of methyl blocking (201 silicone oil, viscosity are 1000 centipoises) 4.95%; Filler: Paris white 39.58%, white carbon black 4.95% under the water proof condition, mixes in mixing machine.Add vinyl tributanoximo silane 2.96%, order adds organotin catalysts 0.05% again, and amine propyl trimethoxy silicane 0.99% continues to mix in mixing machine, and experimental result is referring to subordinate list;
Embodiment one,
Hydroxy-end capped polydimethylsiloxane (107 glue, 20,000 centipoises) 11.88%, hydroxy-end capped polydimethylsiloxane (107 glue, 40,000 centipoises) 34.64%, the polydimethyl siloxane fluid of methyl blocking (201 silicone oil, viscosity are 1000 centipoises) 4.95%; Filler: Paris white 39.58%, white carbon black 4.95% under the water proof condition, mixes in mixing machine.Add vinyl tributanoximo silane 2.96% weight part, order adds organotin catalysts 0.05% again, and the amine propyl group oximino silane 0.99% of this patent description continues to mix in mixing machine, and experimental result is referring to subordinate list;
Embodiment two,
Hydroxy-end capped polydimethylsiloxane (107 glue, 20,000 centipoises) 11.88%, hydroxy-end capped polydimethylsiloxane (107 glue, 40,000 centipoises) 34.64%, the polydimethyl siloxane fluid of methyl blocking (201 silicone oil, viscosity are 1000 centipoises) 4.95%; Filler: Paris white 39.58%, white carbon black 4.95% under the water proof condition, mixes in mixing machine; The amine propyl group oximino silane 0.99% that adds this patent description, order adds vinyl tributanoximo silane 2.96% again, and organotin catalysts 0.05% continues to mix in mixing machine, and experimental result is referring to subordinate list;
Performance test
Surface drying time:
Adopt the testing method of GB13477, the surface drying time of test seal gum;
Deep layer is solidified:
It is 15 millimeters PE circular die that seal gum is injected thickness, is positioned over 23C, under the condition of 50% relative humidity, after 24 hours sample is taken out, and measures the curing depth (test glue has formed the elastomeric degree of depth) of glue respectively; Repeat above-mentioned test process, and solidifying 48 hours and 3 days, tested its curing depth after 4 days and 8 days;
Extrudability:
Adopt ASTM C603 standard method of test, test composition extrudability.
Table one, single-component take off the aging extrusion performance contrast of oxime silicon composition:
| Extrudability (second) | Comparison example | Embodiment one | Embodiment two |
| Initially | 28 | 33 | 34 |
| 80 ℃ 6 days aging | 50 | 36 | 35 |
| 80 ℃ 10 days aging | 60 | 40 | 40 |
| 80 ℃ 14 days aging | Greater than 100 | 40 | 42 |
Table two, single-component take off the aging surface drying performance comparison of oxime silicon composition:
| SCT(minute) | Comparison example | Example one | Example two |
| Initially | 53 | 54 | 53 |
| 80 ℃ 6 days aging | 115 | 46 | 47 |
| 80 ℃ 10 days aging | 178 | 47 | 48 |
| 80 ℃ 14 days aging | Greater than 200 | 47 | 49 |
Table three, single-component take off the contrast of oxime silicon composition curing performance:
| Curing depth (mm) | Comparison example | Example one | Example two |
| 1 day curing depth | 2.6 | 1.9 | 2.8 |
| 2 days curing depths | 4.5 | 3.7 | 5.7 |
| 3 days curing depths | 6.4 | 5.2 | 7.4 |
| 4 days curing depths | 7.3 | 6.5 | 8.5 |
| 8 days curing depths | 9.7 | 9.2 | 11.0 |
The self-vulcanizing silicon composition mixes in Speedmixer equipment in proportion, and the curing of all samples and test are to carry out in 23 ℃, the environment of 50% relative humidity;
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect have been carried out further detailed description; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. storage-stable single-component moisture-curable silicon composition, described composition is made of following component by weight:
Hydroxy-end capped organopolysiloxane A 15%～90%;
Crosslinking agent B 0.5% ~ 10%
Catalyzer C 0.01%～5%;
Amine propyl group oximino silane D 0.1～5%;
Additive E; Wherein,
Described hydroxy-end capped poly-organopolysiloxane A is expressed as HO-(SiR
8R
9-O)
nH,, wherein n makes the integer of its viscosity between 1000 to 500000 centipoises, R
8With R
9Can be selected from unit price hydrocarbon group and unit price halogenation alkyl respectively;
Described crosslinking agent B is the organic ketoximinosilanes that contains a plurality of oximidos, is expressed as R
nSi (ON=CR
2R
3)
4-n, wherein, R is independently selected from the alkyl of C1-C10, the thiazolinyl of C2-C10, the cycloalkyl of C3-C8 or the aryl of C6-C14, R at every turn when occurring
2And R
3Be independently selected from the alkyl of C1-C10 when occurring at every turn; N is that 0, m is 1,2 or 3; Perhaps n is that 1, m is 1 or 2;
Described amine propyl group oximino silane D can be expressed as R
4 bH
2-bNC
3H
6Si (X)
a(Y)
3-a, wherein, R
4By the saturated or unsaturated alkyl of 1 to 20 straight chain that carbon is formed, side chain or ring-type, aryl, or contain this kind alkyl, the aryl of other substituted radicals; Substituent X is alkoxy grp: be expressed as-OR
5, R wherein
5By 1 to 6 alkane that carbon is formed; Substituting group Y is the oximido group: be expressed as-ONC(R
6) (R
7) R wherein
6, R
7Be identical or different by 1 to 10 alkane that carbon is formed; Wherein a and b are 0 to 2 integers;
Described additive E is one or more of Paris white, white carbon black, silicon powder, carbon black or aluminum oxide.
2. according to the silicon composition of claim 1, it is characterized in that this of described other substituted radicals kind of alkyl, aryl be for containing amino, epoxy group(ing), acrylate-based, sulfydryl, ester group, this kind alkyl that the ethers group replaces, aryl; Described R
5Be methyl, ethyl, propyl group, sec.-propyl, butyl, isobutyl-or the tertiary butyl.
3. silicon composition according to claim 2 is characterized in that, described oximido group comprises the acetone oximido, methyl ethyl ketone oximido, methyl propyl ketone oximido, methyl butyl ketone oximido or mibk oximido.
4. according to the silicon composition of claim 3, it is characterized in that, in the expression formula of described hydroxy-end capped poly-organopolysiloxane A, R
8With R
9Can be selected from methyl, ethyl, vinyl or phenyl respectively.
5. according to the silicon composition of claim 4, it is characterized in that the organo-tin compound of described catalyzer C is selected from dibutyl tin dilaurate, dibutyl tin acetate or dioctyl two lauric acid tin.
6. according to the silicon composition of claim 5, it is characterized in that the consumption of described crosslinking agent B is 2% to 5%, the consumption of described catalyzer C is 0.03% to 1%, and the consumption of described amine propyl group oximino silane D is 0.5%～3%.
7. according to the silicon composition of claim 6, it is characterized in that the consumption of described catalyzer C is 0% to 1%, the consumption of described amine propyl group oximino silane D is 1%～2%.
8. according to the silicon composition of claim 7, it is characterized in that described crosslinking agent B is alkoxyl group-ketoximinosilanes, is expressed as R
n-Si (OR
1)
m(ON=CR
2R
3)
4-n-m, wherein, R is independently selected from the alkyl of C1-C10, the thiazolinyl of C2-C10, the cycloalkyl of C3-C8 or the aryl of C6-C14 at every turn when occurring; R
1, R
2And R
3Be independently selected from the alkyl of C1-C10 when occurring at every turn; N is that 0, m is 1,2 or 3; Perhaps n is that 1, m is 1 or 2.
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Cited By (7)
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|---|---|---|---|---|
| CN103571198A (en) * | 2013-11-21 | 2014-02-12 | 山东大学 | Preparation method of oxime-removing type organic silicon sealing component capable of resisting low temperature of 120 DEG C below zero |
| CN103571199A (en) * | 2013-11-21 | 2014-02-12 | 山东大学 | Preparation method for oxime-removing type organic silicon sealing component capable of resisting low temperature of 100 DEG C below zero |
| CN107652942A (en) * | 2017-10-24 | 2018-02-02 | 山东永安胶业有限公司 | High extrudability silicone sealant of low-density and preparation method thereof |
| CN107936562A (en) * | 2017-11-06 | 2018-04-20 | 浙江衢州硅宝化工有限公司 | A kind of non-corrosive ketoxime type room curing silicon rubber and preparation method |
| CN108239519A (en) * | 2018-01-02 | 2018-07-03 | 深圳市广业电子科技有限公司 | A kind of quick-setting one component room temperature curing silicone compositions |
| CN111286144A (en) * | 2018-12-07 | 2020-06-16 | 财团法人工业技术研究院 | Thermoplastic vulcanized elastomer and method for producing same |
| CN115197673A (en) * | 2022-08-03 | 2022-10-18 | 江西天永诚高分子材料有限公司 | Low-toxicity single-component photovoltaic frame silicone sealant and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107936562A (en) * | 2017-11-06 | 2018-04-20 | 浙江衢州硅宝化工有限公司 | A kind of non-corrosive ketoxime type room curing silicon rubber and preparation method |
| CN108239519A (en) * | 2018-01-02 | 2018-07-03 | 深圳市广业电子科技有限公司 | A kind of quick-setting one component room temperature curing silicone compositions |
| CN108239519B (en) * | 2018-01-02 | 2020-11-27 | 深圳市广业电子科技有限公司 | Fast-curing one-component room-temperature-curing organic silicon composition |
| CN111286144A (en) * | 2018-12-07 | 2020-06-16 | 财团法人工业技术研究院 | Thermoplastic vulcanized elastomer and method for producing same |
| CN111286144B (en) * | 2018-12-07 | 2021-10-08 | 财团法人工业技术研究院 | Thermoplastic vulcanized elastomer and method for producing same |
| CN115197673A (en) * | 2022-08-03 | 2022-10-18 | 江西天永诚高分子材料有限公司 | Low-toxicity single-component photovoltaic frame silicone sealant and preparation method thereof |
| CN115197673B (en) * | 2022-08-03 | 2023-03-03 | 江西天永诚高分子材料有限公司 | Low-toxicity single-component photovoltaic frame silicone sealant and preparation method thereof |
| WO2024027006A1 (en) * | 2022-08-03 | 2024-02-08 | 江西天永诚高分子材料有限公司 | Low-toxicity single-component silicone sealant for photovoltaic frame and preparation method therefor |
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