CN100400570C - Pugging type silicon rubber structured control agent - Google Patents
Pugging type silicon rubber structured control agent Download PDFInfo
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- CN100400570C CN100400570C CNB2006100517653A CN200610051765A CN100400570C CN 100400570 C CN100400570 C CN 100400570C CN B2006100517653 A CNB2006100517653 A CN B2006100517653A CN 200610051765 A CN200610051765 A CN 200610051765A CN 100400570 C CN100400570 C CN 100400570C
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Abstract
The present invention provides a low polysiloxane polymer which has a general formula of R<2>O (SiR2<1>O) xSiOR<3>R<4>CH=CH2, wherein R<1> is a monovalent hydrocarbon radical with the carbon number of 1 to 12, R<2> is a hydrogen atom or an alkyl radical, x is an integral number from 1 to 50, R<3> is a hydrogen atom or an alkyl radical, and R4 is an alkyl radical or an alkoxy group. The present invention also provides a composition containing at least one kind of the low polysiloxane polymer. The low polysiloxane polymer and the composition thereof can be used as multifunctional mixing type silicon rubber structurization control agents and have a favorable structurization resisting effect, and simultaneously, the present invention inhibits the reduction of the plasticity of mixing type silicon rubber and enhances the mechanical property and the rebound elasticity of mixing type silicon rubber and vulcanized rubber.
Description
(1) technical field
The present invention relates to a kind of multi-functional pugging type silicon rubber structured control agent, anti-structurizing is effective, and can suppress the mechanical property and the rebound resilience of plastic reduction of mixed milling type silicon rubber and raising mixed milling type silicon rubber cross-linked rubber.
(2) background technology
Usually, raw-silastic continuously need carry out reinforcement with vapor phase process or precipitated silica.Because the specific surface area of white carbon black surpasses 100m
2/ g, and contain a large amount of SiOH bases on the surface, SiOH base and planar water thereof easily with the rubber molecule in Si-O key or the effect of Si-OH key, form the cubic network structure, generation structurizing phenomenon.Structurizing easily causes mixed milling type silicon rubber poor in processability, back mixing difficulty, storage period is short and rheological is poor and the Mooney viscosity height causes problems such as product defect easily.Generally adopt the way of when mixing, adding antistructurizing agent to alleviate structurizing in the production.When mixing, white carbon black is rubbed and is dispersed in the rubber, and the antistructurizing agent of adding does not react with rubber, but preferentially gathers the white carbon black surface, plays the effect of resistive connection structure.
Use at present the most general antistructurizing agent to be α, the low polydimethylsiloxane of alpha, omega-dihydroxy.Hydroxy radical content is high more, and is anti-structural good more.Advantages such as it is anti-structural good, easy to use to use hydroxy silicon oil to have as antistructurizing agent, and the rubber unvulcanizate of gained is transparent.Outside the hydroxyl-removal silicone oil, phenylbenzene dihydroxyl silane, silazane, low molecule organoalkoxysilane etc. also can be used as anti-antistructurizing agent, but all exist function singleness, poor stability, consumption is big slightly, and sizing material is clamminess, and reduces tensile strength at yield, strengthens problems such as setafter break and rebound resilience.Phenylbenzene dihydroxyl silane also can be used as antistructurizing agent and can improve the thermotolerance of rubber unvulcanizate, but phenylbenzene dihydroxyl silane is solid-state, must be before mixing back adds superoxide at 150 ℃ of-250 ℃ of following thermal treatment 0.5-1.0 hours, its structure control effect of competence exertion uses inconvenience.
In addition, Chinese patent application 200510106541.3 has been mentioned a kind of novel texture chemical control preparation, and structural formula is the low polydimethylsiloxane of alpha-alkoxy base-ω-hydroxyl-methyl ethylene silicone copolymers.This antistructurizing agent is owing to have active vinyl, therefore also can improve the tearing toughness of silicon rubber, but this antistructurizing agent with vinyl be on side chain, active not enough, and one section free segment is arranged between crosslinked end group and first cross-linking set when crosslinking reaction, and free segmental existence is equivalent to add softening agent in cross-linked rubber, has reduced the intensity of silicon rubber.
" special synthetic rubber " the 4th volume in 1980, once reported for the 58th page, by adding multi-vinyl silicone oil, make on the silicon rubber molecular chain side chain with going up more active ethylene group, because its vinyl is more concentrated at some position, it is intensive crosslinked that silicon rubber is produced at these positions, and it is less at the cross-linking density at other position, thereby formed alternatively distributed cross-linked network and concentrated cross-linking set, can absorb stress, improved the tear strength of silicon rubber.All on side chain, activity is good inadequately for its vinyl major part of multi-vinyl silicone oil that adds.By adding multi-vinyl silicone oil,, easily reduced other mechanical property of silicon rubber though can improve tearing strength because the basic relatively glue of multi-vinyl silicone oil that adds is equivalent to softening agent.
Therefore have the research and development of the antistructurizing agent of multi-functional novelty, significant to the development that promotes silicon rubber gross rubber.
(3) summary of the invention
At above-mentioned deficiency, the invention provides a kind of not only have preferably anti-structural but also can improve the Multifucntional pugging type silicon rubber structured control agent of the mechanical property of silicon rubber.
The structural formula general formula of antistructurizing agent of the present invention is: R
2O (SiR
1 2O)
xSiOR
3R
4CH=CH
2, R wherein
1For carbonatoms is the monovalence alkyl of 1-12, being preferably carbonatoms is the monovalence alkyl of 1-8, R
2Be hydrogen atom or alkyl, x is the integer of 1-50, is preferably the integer of 1-20, the integer of 1-10 more preferably, R
3Be hydrogen atom or alkyl, R
4Be alkyl or alkoxyl group.R
1Preferable methyl.As R
2General example alkyl such as hydrogen atom, methyl, ethyl, propyl group, butyl are arranged, preferred hydrogen atom, methyl, ethyl.As R
3General example alkyl such as hydrogen atom, methyl, ethyl, propyl group, butyl are arranged, preferred hydrogen atom, methyl, ethyl.As R
4General example methyl, ethyl, methoxyl group, oxyethyl group are arranged.
The antistructurizing agent that antistructurizing agent provided by the invention generally uses relatively now has how better function.
At first, the present invention makes molecular chain-end introduce vinyl by special end-capping reagent, the activity of end-vinyl is much higher than the activity of vinyl on side chain, therefore, basically the whole end groups that contain vinyl can be participated in crosslinked, this has just reduced not crosslinked end group to the free segment between first cross-linking set, can not reduce the intensity of silicon rubber.And the activity of end-vinyl is greater than the activity of side chain vinyl, crosslinking reaction is early carried out, the early strength of this favourable raising cross-linked rubber, and the antistructurizing agent that contains end-vinyl also has the effect of chain propagation agent, can effectively improve the physical strength of cross-linked rubber, not only improve tearing strength and improved tensile strength simultaneously.
Secondly, owing to have the function of resistive connection structure and the mechanical property that improves silicon rubber simultaneously, avoided because the interpolation multi-vinyl silicone oil improves the problem of other mechanical property that the tearing strength of silicon rubber brings according to antistructurizing agent of the present invention.
In addition, it belongs to the Liquid Structure control agent, has avoided the solid-state structure control agent to need the deficiency of thermal treatment competence exertion structure control effect under hot conditions.
According to the present invention, can controlled silicon rubber gross rubber plasticity-degenerate and raising mixed milling type silicon rubber cross-linked rubber impart tear and elastic multifunction structure chemical control preparation.Not only can make not recurring structureization of silicon rubber gross rubber prolonged preservation, keeping, and can improve mixed milling type silicon rubber cross-linked rubber impart tear and rebound resilience.
The present invention can obtain by following scheme implementation: under an acidic catalyst effect, dimethyl siloxane ring body DMC and methyl ethylene dialkoxy silicane or dimethyl vinyl alkoxy silane back flow reaction generate oligomeric dimethylsilane, reflux temperature is different and different according to reactant, generating product when adopting the reaction of DMC and methyl ethylene dialkoxy silicane is α-vinyl-α, ω-dialkoxy hangs down polydimethylsiloxane, if adopt DMC and the reaction of dimethyl vinyl alkoxy silane then to generate the low polydimethylsiloxane of α-vinyl-ω-alkoxyl group.
Above-mentioned two kinds of products all are according to antistructurizing agent of the present invention.In addition, if on the basis of such scheme again with suitable quantity of water reaction then generate α-vinyl-α, ω-alkoxyl group, the low polydimethylsiloxane of hydroxyl or the low polydimethylsiloxane of α-vinyl-ω-hydroxyl.Equally, two kinds of materials of this that obtains also are according to antistructurizing agent of the present invention.
Elder generation's controlled temperature is under the boiling temperature of end-capping reagent during reaction, and back flow reaction slowly is warmed up to 80 ℃-140 ℃ again after for some time, and insulation is more than 3 hours.
The consumption of end-capping reagent methyl ethylene dialkoxy silicane (or dimethyl vinyl alkoxy silane) is generally excessive slightly than theoretical consumption, and the 1.1-2.0 of preferential Choice Theory consumption doubly.
Described DMC is D
3, D
4, D
5In the mixture of dimethyl siloxane ring body, generally have the following formula structure:
Described an acidic catalyst can be acidic solid catalyst, is preferably Zeo-karb and atlapulgite.These two kinds of acidic solid catalysts not only use and handle conveniently, and can reuse.Described atlapulgite can be powdery, particulate state, also can be bulk, and the average order number of normally used atlapulgite is 20～200 orders.The consumption of acidic solid catalyst is calculated by weight the 1%-15% that is generally the dimethyl siloxane ring body, is preferably 3%-10%.
When adding suitable quantity of water, control amount of water back flow reaction, the part alkoxyl group is hydrolyzed to hydroxyl, and by product is an alcohols, and temperature of reaction generally is the reflux temperature of alcohols.Control adds the water yield, and the mol ratio of generally controlling the water yield and end-capping reagent consumption is between 1.5-4.
Can make by aforesaid method according to antistructurizing agent provided by the invention, but be not limited to this kind method.
Select suitable rubber, reinforced filling white carbon black and a certain proportion of anti-antistructurizing agent during the preparation rubber unvulcanizate, after the kneading evenly, low-molecular material is removed in vacuum-treat in kneader, gets silicon rubber gross rubber.Add superoxide silicon rubber is carried out one step cure, elevated temperature carries out post vulcanization under comparatively high temps then, removes residual volatile matter.Measure mechanical property behind normal pressure silicon rubber gross rubber one step cure and the post vulcanization respectively according to GBs such as GB/T 528-1998, GB/T 529-1999, GB/T 531-1999, test-results shows, and is used better according to antistructurizing agent effect provided by the invention.
According to α-vinyl of the present invention-α, the low polydimethylsiloxane of ω-dialkoxy and α-vinyl-α, ω-alkoxyl group, hydroxyl hangs down polydimethylsiloxane, is very effective as the antistructurizing agent of silicon rubber gross rubber.They not only can be controlled silicon rubber gross rubber plasticity-and degenerate, improve mixed milling type silicon rubber cross-linked rubber mechanical property and rebound resilience, and the excellent anti of recurring structureization is not structural can to make silicon rubber gross rubber have prolonged preservation.
(4) embodiment
The invention will be further described below by embodiment, but protection scope of the present invention is not limited to this.
By silicon rubber gross rubber is dried by the fire 4h in 160 ℃ of baking ovens, after the cooling, put in the 150mm mill that roll spacing is made as 1mm and survey the effect that the film refining comes test structure chemical control preparation to slick number of times.Desired times is fewer, more is difficult for recurring structureization, and then used antistructurizing agent effect is good more.
In the following embodiments, measure mechanical property behind normal pressure silicon rubber gross rubber one step cure and the post vulcanization respectively according to GBs such as GB/T 528-1998, GB/T 529-1999, GB/T 531-1999;
Embodiment 1
Getting 310g DMC carries out underpressure distillation earlier and sloughs 14g DMC and water; add 105g methyl ethylene dimethoxy silane again; be warmed up to 100 ℃ after stirring and add the 21g granule active clay; stir isothermal reaction 1 hour; after slowly be warmed up to 120 ℃ and continue stir 3 hours postcooling of insulation reaction to normal temperature, remove by filter atlapulgite, 120 ℃ of filtrates ,-0.1Mpa under underpressure distillation slough the 30g low-molecular material; obtain colourless, the transparent liquid of 364g at last, its viscosity is 6.5mm
2/ s, methoxy content are 8.82% (methoxy content is weight percentage, and is as follows), and contents of ethylene is 14.0% (contents of ethylene is molar percentage, and is as follows).
Embodiment 2
Getting 310g DMC carries out underpressure distillation earlier and sloughs 14g DMC and water; add 128g methyl ethylene diethoxy silane again; be warmed up to 120 ℃ after stirring and add the 21g granule active clay; stir 4 hours postcooling of insulation reaction to normal temperature; remove by filter atlapulgite; 120 ℃ of filtrates ,-0.1Mpa under underpressure distillation slough the 32g low-molecular material, obtain colourless, the transparent liquid of 384g at last, its viscosity is 7.0mm
2/ s, oxyethyl group content are 12.8%, and contents of ethylene is 13.8%.
Embodiment 3
Getting 310g DMC carries out underpressure distillation earlier and sloughs 14g DMC and water; add 105g methyl ethylene dimethoxy silane again; be warmed up to 100 ℃ after stirring and add the 21g granule active clay; stir isothermal reaction 1 hour; after slowly be warmed up to 120 ℃ and continue stir insulation reaction after 3 hours; be cooled to 64 ℃; add 78 ℃ of insulation reaction of 24g water after 3 hours; be cooled to normal temperature; remove by filter atlapulgite; 120 ℃ of filtrates ,-0.1Mpa under underpressure distillation slough the 25g low-molecular material, obtain colourless, the transparent liquid of 390g at last, its viscosity is 11.0mm
2/ s, hydroxy radical content are 3.02%, and methoxy content is 5.29%, and contents of ethylene is 13.2%.
Embodiment 4
Getting 310g DMC carries out underpressure distillation earlier and sloughs 14g DMC and water; add 128g methyl ethylene diethoxy silane again; be warmed up to 120 ℃ after stirring and add the 21g granule active clay; stir insulation reaction and be cooled to 78 ℃ after 4 hours, add 78 ℃ of insulation reaction of 24g water after 3 hours, be cooled to normal temperature; remove by filter atlapulgite; 120 ℃ of filtrates ,-0.1Mpa under underpressure distillation slough the 28g low-molecular material, obtain colourless, the transparent liquid of 408g at last, its viscosity is 12.5mm
2/ s, hydroxy radical content are 2.91%, and oxyethyl group content is 8.12%, and contents of ethylene is 12.9%.
Embodiment 5
At mean polymerisation degree is 8000, and contents of ethylene is that the adding specific surface area is 180m in methyl ethylene rubber (110-2, Zhejiang Xinan Chemical Industry Group Co.Ltd) 100 weight parts of 0.16 mole of %
2The precipitated silica of/g, median size 1 μ m (TMG, Tonghua, Jilin company limited) 43 weight parts and as the α of antistructurizing agent, (at 25 ℃ viscositys is 15mm to the low polydimethylsiloxane of alpha, omega-dihydroxy
2/ s, hydroxy radical content are 6.0%) with embodiment 1 in product calculating by weight mixture 3.0 weight parts of 3: 1 mixed, in Z-shaped kneader, mediate evenly after, removed low-molecular material in 1 hour in 180 ℃ of vacuum heat treatment, obtain silicon rubber gross rubber.To these silicon rubber gross rubber 100 weight parts, with 150mm mill blending dispersion 0.6 weight part 2,5-dimethyl-2,5 di-t-butyl hexane peroxides, make curable silicone rubber composition, it is one step cure that this curable silicone rubber composition is carried out 10 minutes compression moldings in 170 ℃, and to carry out postcure in 4 hours in 200 ℃ again be post vulcanization by required, detect its mechanical property and anti-structurized effect respectively, measurement result is shown in table 1,2.
Embodiment 6
Except replace the product among the embodiment 1 with the product among the embodiment 2, operation similarly to Example 5, preparation silicon rubber gross rubber, curable silicone rubber and rubber sheet with the rerum natura of embodiment 5 with method mensuration or evaluate cure, the results are shown in table 1,2.
Embodiment 7
Except replace the product among the embodiment 1 with the product among the embodiment 3, operation similarly to Example 5, preparation silicon rubber gross rubber, curable silicone rubber and rubber sheet with the rerum natura of embodiment 5 with method mensuration or evaluate cure, the results are shown in table 1,2.
Embodiment 8
Except replace the product among the embodiment 1 with the product among the embodiment 4, operation similarly to Example 5, preparation silicon rubber gross rubber, curable silicone rubber and rubber sheet with the rerum natura of embodiment 5 with method mensuration or evaluate cure, the results are shown in table 1,2.
Comparative example 1
(at 25 ℃ viscositys is 15mm except hanging down polydimethylsiloxane with α, alpha, omega-dihydroxy
2/ s, hydroxy radical content is 6.0%) replace outside the antistructurizing agent among the embodiment 5 operation similarly to Example 5, preparation silicon rubber gross rubber, curable silicone rubber and rubber sheet, with the rerum natura of embodiment 5, the results are shown in table 1,2 with method mensuration or evaluate cure.
The mechanical property of table 1 different structure chemical control preparation one step cure
Embodiment 5 embodiment 6 embodiment 7 embodiment 8 comparative examples 1
Shao Er hardness (A) 48 49 49 50 49
Tensile strength at yield (MPa) 8.4 8.0 8.6 8.1 7.6
Tensile yield (%) 400 380 420 400 360
Tear strength (KN/m) 27.2 25.8 30.6 28.4 23.2
Setafter break (%) 4.8 5.2 4.2 5.0 5.8
Processibility (inferior) 25 26 21 22 24
The mechanical property of table 2 different structure chemical control preparation post vulcanization
Embodiment 5 embodiment 6 embodiment 7 embodiment 8 comparative examples 1
Shao Er hardness (A) 49 50 50 51 50
Tensile strength at yield (MPa) 8.8 8.2 9.1 8.5 6.5
Tensile yield (%) 360 340 400 380 280
Tear strength (KN/m) 27.8 26.8 31.2 30.1 21.4
Setafter break (%) 3.4 3.8 2.8 3.0 3.6
Embodiment 9
Getting 310g DMC carries out underpressure distillation earlier and sloughs 14g DMC and water; add 80g dimethyl vinyl Ethoxysilane again; be warmed up to 100 ℃ after stirring and add the 19g granule active clay; stir 4 hours postcooling of insulation reaction to normal temperature; remove by filter atlapulgite; filtrate 110 ℃ ,-0.1Mpa under underpressure distillation slough the 30g low-molecular material, obtain colourless, the transparent liquid of 340g at last, its viscosity is 6.0mm
2/ s, oxyethyl group content are 6.02% (oxyethyl group content is weight percentage, and is as follows), and contents of ethylene is 10.9% (contents of ethylene is molar percentage, and is as follows).
Embodiment 10
Get 310g DMC and 80g dimethyl vinyl Ethoxysilane; be warmed up to 100 ℃ after stirring and add 4 hours postcooling of 19g granule active clay stirring insulation reaction to normal temperature; remove by filter atlapulgite; filtrate 110 ℃ ,-0.1Mpa under underpressure distillation slough the 36g low-molecular material; obtain colourless, the transparent liquid of 348g at last, its viscosity is 5.5mm
2/ s, oxyethyl group content are 6.34%, and contents of ethylene is 12.2%.
Embodiment 11
Getting 310g DMC carries out underpressure distillation earlier and sloughs 14g DMC and water; add 80g dimethyl vinyl Ethoxysilane again; be warmed up to 100 ℃ after stirring and add 19g granule active clay stirring insulation reaction after 4 hours; be cooled to 78 ℃, add 78 ℃ of insulation reaction of 18g water after 3 hours, be cooled to normal temperature; remove by filter atlapulgite; filtrate 110 ℃ ,-0.1Mpa under underpressure distillation slough the 25g low-molecular material, obtain colourless, the transparent liquid of 360g at last, its viscosity is 11.0mm
2/ s, hydroxy radical content are 2.56%, and oxyethyl group content is 0.66%, and contents of ethylene is 11.2%.
Embodiment 12
Get 310g DMC and 80g dimethyl vinyl Ethoxysilane; be warmed up to 10 ℃ of adding 19g granule active clays stirring insulation reaction after stirring and be cooled to 78 ℃ in 4 hours; add 78 ℃ of insulation reaction of 18g water after 3 hours; be cooled to normal temperature; remove by filter atlapulgite; the 40g low-molecular material is sloughed in filtrate underpressure distillation under 110 ℃-0.1Mpa, obtains colourless, the transparent liquid of 346g at last, and its viscosity is 9.5mm
2/ s, hydroxy radical content are 2.78%, and oxyethyl group content is 0.84%, and contents of ethylene is 10.6%.
Embodiment 13
At mean polymerisation degree is 8000, and contents of ethylene is that the adding specific surface area is 180m in methyl ethylene rubber (110-2, Zhejiang Xinan Chemical Industry Group Co.Ltd) 100 weight parts of 0.16 mole of %
2The precipitated silica of/g, median size 1 μ m (TMG, Tonghua, Jilin company limited) 43 weight parts and as the α of antistructurizing agent, (at 25 ℃ viscositys is 15mm to the low polydimethylsiloxane of alpha, omega-dihydroxy
2/ s, hydroxy radical content are 6.0%) with embodiment 9 in product to calculate by weight mixture 3.0 weight parts of 3/1 mixed, in Z-shaped kneader, mediate evenly after, removed low-molecular material in 1 hour in 180 ℃ of vacuum heat treatment, obtain silicon rubber gross rubber.To these silicon rubber gross rubber 100 weight parts, with 150mm mill blending dispersion 0.6 weight part 2,5-dimethyl-2,5 di-t-butyl hexane peroxides, make curable silicone rubber composition, it is one step cure that this curable silicone rubber composition is carried out 10 minutes compression moldings in 170 ℃, and to carry out postcure in 4 hours in 200 ℃ again be post vulcanization by required, detect its mechanical property and anti-structurized effect respectively, measurement result is shown in table 3,4.
Embodiment 14
Except replace the product among the embodiment 9 with the product among the embodiment 10, operation similarly to Example 13, preparation silicon rubber gross rubber, curable silicone rubber and rubber sheet with the rerum natura of embodiment 13 with method mensuration or evaluate cure, the results are shown in table 3,4.
Embodiment 15
Except replace the product among the embodiment 9 with the product among the embodiment 11, operation similarly to Example 13, preparation silicon rubber gross rubber, curable silicone rubber and rubber sheet with the rerum natura of embodiment 13 with method mensuration or evaluate cure, the results are shown in table 3,4.
Embodiment 16
Except replace the product among the embodiment 9 with the product among the embodiment 12, operation similarly to Example 13, preparation silicon rubber gross rubber, curable silicone rubber and rubber sheet with the rerum natura of embodiment 13 with method mensuration or evaluate cure, the results are shown in table 3,4.
Comparative example 2
(at 25 ℃ viscositys is 15mm except hanging down polydimethylsiloxane with α, alpha, omega-dihydroxy
2/ s, hydroxy radical content is 6.0%) replace outside the antistructurizing agent among the embodiment 13 operation similarly to Example 13, preparation silicon rubber gross rubber, curable silicone rubber and rubber sheet, with the rerum natura of embodiment 13, the results are shown in table 3,4 with method mensuration or evaluate cure.
The mechanical property of table 3 different structure chemical control preparation one step cure
Embodiment 13 embodiment 14 embodiment 15 embodiment 16 comparative examples 2
Shao Er hardness (A) 48 49 49 50 49
Tensile strength at yield (MPa) 8.6 8.2 9.0 8.3 7.2
Tensile yield (%) 420 400 440 400 360
Tear strength (KN/m) 26.8 26.0 31.2 28.8 23.2
Setafter break (%) 4.2 4.6 3.8 4.8 5.8
Processibility (inferior) 26 27 23 25 25
The mechanical property of table 4 different structure chemical control preparation post vulcanization
Embodiment 13 embodiment 14 embodiment 15 embodiment 16 comparative examples 2
Shao Er hardness (A) 49 50 50 51 50
Tensile strength at yield (MPa) 8.8 8.5 9.3 8.6 6.8
Tensile yield (%) 380 360 400 380 280
Tear strength (KN/m) 27.2 27.6 32.9 31.2 21.4
Setafter break (%) 2.8 3.2 2.4 2.6 3.6
Claims (21)
1. siloxane polymer, its general formula is: R
2O (SiR
1 2O)
xSiOR
3R
4CH=CH
2, R wherein
1Be methyl, R
2Be hydrogen atom or alkyl, R
3Be hydrogen atom or alkyl, R
4Be methyl, ethyl, methoxy or ethoxy, x is the integer of 1-50.
2. siloxane polymer according to claim 1 is characterized in that x is the integer of 1-20.
3. siloxane polymer according to claim 2 is characterized in that x is the integer of 1-10.
4. siloxane polymer according to claim 1 is characterized in that R
2Be hydrogen atom, methyl, ethyl, propyl group, butyl or other alkyl.
5. siloxane polymer according to claim 5 is characterized in that R
2Be hydrogen atom, methyl or ethyl.
6. siloxane polymer according to claim 1 is characterized in that R
3Be hydrogen atom, methyl, ethyl, propyl group or butyl or other alkyl.
7. siloxane polymer according to claim 6 is characterized in that R
3Be hydrogen atom, methyl or ethyl.
8. siloxane polymer according to claim 1 is characterized in that R
1Be methyl, R
2Be hydrogen atom, methyl, ethyl, propyl group, butyl or other alkyl, R
3Be hydrogen atom, methyl, ethyl, propyl group or butyl or other alkyl, R
4Be methyl, ethyl, methoxy or ethoxy.
9. according to each described siloxane polymer of claim 1-8, wherein said siloxane polymer is α-vinyl-α, ω-dialkoxy polydimethylsiloxane, or α-vinyl-ω-alkoxyl group polydimethylsiloxane.
10. according to each described siloxane polymer of claim 1-8, wherein said siloxane polymer is α-vinyl-α, ω-alkoxyl group hydroxyl polydimethylsiloxane, perhaps α-vinyl-ω-hydroxyl polydimethylsiloxane.
11., it is characterized in that as pugging type silicon rubber structured control agent according to each described siloxane polymer among the claim 1-8.
12. a composition comprises at least a according to each described siloxane polymer among the claim 1-11.
13. composition according to claim 12, it is as pugging type silicon rubber structured control agent.
14. method for preparing each described siloxane polymer of claim 1-11, it is characterized in that: under an acidic catalyst effect, dimethyl siloxane ring body DMC and end-capping reagent methyl ethylene dialkoxy silicane or end-capping reagent dimethyl vinyl alkoxy silane back flow reaction, reflux temperature is different and different according to reactant, generates oligomeric dimethylsilane; Generating product when adopting the reaction of DMC and methyl ethylene dialkoxy silicane is α-vinyl-α, ω-dialkoxy polydimethylsiloxane, or adopt DMC and the reaction of dimethyl vinyl alkoxy silane then to generate α-vinyl-ω-alkoxyl group polydimethylsiloxane.
15. the method for siloxane polymer according to claim 14, it is characterized in that: obtained product generates α-vinyl-α respectively with the suitable quantity of water reaction again, ω-alkoxyl group, hydroxyl polydimethylsiloxane or α-vinyl-ω-hydroxyl polydimethylsiloxane.
16. the method for preparing siloxane polymer according to claim 14 is characterized in that: the consumption of end-capping reagent methyl ethylene dialkoxy silicane or dimethyl vinyl alkoxy silane is 1.1-2.0 a times of theoretical consumption.
17. the method for preparing siloxane polymer according to claim 14 is characterized in that: described an acidic catalyst is an acidic solid catalyst.
18. the method for preparing siloxane polymer according to claim 14 is characterized in that: described an acidic catalyst is Zeo-karb and atlapulgite.
19. the method for preparing siloxane polymer according to claim 14 is characterized in that: the consumption of described an acidic catalyst is calculated by weight to the 1%-15% of dimethyl siloxane ring body.
20. the method for preparing siloxane polymer according to claim 14 is characterized in that: the consumption of described an acidic catalyst is calculated by weight to the 3%-10% of dimethyl siloxane ring body.
21. the method for preparing siloxane polymer according to claim 14 is characterized in that: when adding suitable quantity of water, control amount of water back flow reaction, the part alkoxyl group is hydrolyzed to hydroxyl, and by product is an alcohols, and temperature of reaction is the reflux temperature of alcohols; Control adds the water yield, and the mol ratio of the control water yield and end-capping reagent consumption is between 1.5-4.
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| CN102775793A (en) * | 2012-07-12 | 2012-11-14 | 中国恩菲工程技术有限公司 | Preparation method of addition-type vulcanized rubber |
| US10947380B2 (en) * | 2018-12-20 | 2021-03-16 | The Goodyear Tire & Rubber Company | Functionalized polymer, rubber composition and pneumatic tire |
| CN109988309B (en) * | 2019-03-26 | 2022-02-01 | 浙江置正有机硅有限公司 | Preparation method and equipment of alkoxy anti-structuring agent |
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| CN114736375A (en) * | 2022-05-16 | 2022-07-12 | 江苏众合硅基新材料有限公司 | Continuous method methoxy silicone oil synthesis process |
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