CN104694065A - Silicane modified polyurethane sealant used for automobile and preparing method thereof - Google Patents
Silicane modified polyurethane sealant used for automobile and preparing method thereof Download PDFInfo
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Abstract
The invention discloses silicane modified polyurethane sealant used for an automobile and a preparing method thereof. Silicane modified polyurethane polymer, plasticizer, filling, reinforcing agents, cross-linking agents, thickening agents, catalytic agents and an antioxidant are used as raw materials. The preparing method includes the steps that firstly, the silicane modified polyurethane polymer and the plasticizer are evenly mixed at the temperature of 80 DEG C-90 DEG C under the vacuum degree of 0.06 MPa-0.09 MPa; then the filling is added, and stirring and mixing are performed evenly; then the reinforcing agents and the antioxidant are added, dehydrated and blended evenly at the temperature of 100 DEG C-120 DEG C under the vacuum degree of 0.06 MPa-0.09 MPa; finally, the cross-linking agents, the thickening agents and the catalytic agents are added and mixed evenly under the vacuum degree of 0.06 MPa-0.09 MPa to obtain the silicane modified polyurethane sealant used for the automobile. Compared with the same kind of materials, the silicane modified polyurethane sealant used for the automobile is wide in selection range of mechanical properties, and can be used for sealing and adhering of different component of the automobile according to different requirements; the water-resistant performance is excellent, and the safety of automobile operation is ensured; meanwhile, the sealant has excellent mechanical performance and adhesive performance, is resistant to aging, and can be widely applied to the field of automobile manufacturing.
Description
Technical field
Embodiments of the present invention relate to polymeric material field, more specifically, embodiments of the present invention are related to and to be a kind ofly hydrolyzed under moist conditions by linking agent, to prepare with silicane-modified polyurethane generation crosslinking reaction and automobile silicane-modified polyurethane seal gum of obtaining and preparation method thereof.
Background technology
Along with the continuous progress of science and technology, automobile industry is gradually to safety and comfort, good looking appearance, energy-conserving and environment-protective, light-weighted future development.As one of indispensable material in automobile making, the development and application of high performance sealant seems abnormal important.
Seal gum is a kind of material being used for filling cavity, seam, at automobile manufacturing field, is mainly used in the bonding of the parts such as windshield glass, car light, door and window, vehicle-mounted skylight, automotive trim and sealing, plays the effect such as waterproof and dustproof, sound insulation.
Polyurethane sealant applies one of sealing material more widely at present.Polyurethane sealant has excellent mechanical property, is mainly used in the assembling of windshield.But polyurethane material ageing-resistant performance is poor, easily there is phenomenons such as leaking in the seal gum after aging, can not ensure the security of automobilism.The cementability that inorganic materials commonly used by polyurethane sealant and the automobile such as glass, aluminium is poor, and during use, special primary coat need be coordinated can to ensure its cementability, and construction technology is more complicated.In addition, one of raw material preparing urethane isocyanic ester belongs to hypertoxic class, not environmentally.
Organosilicon sealant curing speed is fast, good with inorganic materials cementability, high temperature resistant, ageing-resistant performance is excellent, long service life, but its mechanical property is poor, can not meet the requirement of Automobile sealant.
Organic silicon modified polyurethane seal gum not only has the mechanical property of polyurethane sealant excellence, and has the good cementability of organosilicon sealant, the performance such as ageing-resistant, and the one becoming current Automobile sealant is better selected.As individually disclosed a kind of silicane-modified polyurethane material in patent CN102504748, CN102516917 and CN104087230, all there is excellent mechanical property, cementability and ageing-resistant performance, wherein, disclosed in patent CN102504748, silicane-modified polyurethane material has the characteristic of quick surface drying, disclosed in CN102516917, silicane-modified polyurethane material has more excellent resistance toheat, silicane-modified polyurethane material more environmental protection disclosed in CN104087230.But above organic silicon modified polyurethane seal gum patented technology product mechanical property range of choice is narrower, the service requirements of the different parts of Automobile sealant can not be met completely.In addition, as previously mentioned, waterproof is one of effect of Automobile sealant, and in existing silicane-modified polyurethane seal gum patented technology, not yet mentions the water tolerance of material.
Therefore, for meeting the different service requirementss of automobile manufacture industry to seal gum, ensure safety, the stability in car running process, need that a kind of mechanical property range of choice of exploitation is wide, water resistance is excellent badly, and possess the automobile silicane-modified polyurethane seal gum of excellent mechanical property, cementability, ageing resistance simultaneously.
Summary of the invention
The present invention is directed to the deficiency of existing silicane-modified polyurethane seal gum performance, a kind of automobile silicane-modified polyurethane seal gum and preparation method thereof is provided, a kind of there is excellent mechanical property, cementability, ageing resistance, water tolerance and the wider automobile silicane-modified polyurethane seal gum of mechanical property range of choice to expect to obtain.
For solving above-mentioned technical problem, one embodiment of the present invention by the following technical solutions:
A kind of automobile silicane-modified polyurethane seal gum, sealing glue is made up of following raw material by weight:
The silicane-modified polyurethane polymer raw material that automobile silicane-modified polyurethane seal gum of the present invention uses is the silicane-modified polyurethane of Trimethoxy silane end-blocking, the silicane-modified polyurethane of triethoxyl silane end-blocking or the mixture of the two.
The softening agent raw material that automobile silicane-modified polyurethane seal gum of the present invention uses is at least one in dimixo-octyl phthalate, diisobutyl phthalate, Di Iso Decyl Phthalate, diisononyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate (DOP), butyl benzyl phthalate.
The filler material that automobile silicane-modified polyurethane seal gum of the present invention uses is at least one in calcium carbonate, gas-phase silica, titanium dioxide, carbon black, talcum powder, organobentonite.
The strengthening agent raw material that automobile silicane-modified polyurethane seal gum of the present invention uses is at least one in liquid isoprene-isobutylene rubber, liquid styrene butadiene rubber, liquid acrylonitrile butadiene rubber, liquid isoprene rubber.
The linking agent raw material that automobile silicane-modified polyurethane seal gum of the present invention uses is at least one in methyltrimethoxy silane, Union carbide A-162, vinyltrimethoxy silane, vinyltriethoxysilane, anilinomethyl triethoxysilane.
The tackifier raw material that automobile silicane-modified polyurethane seal gum of the present invention uses is at least one in aminopropyl trimethoxysilane, aminopropyl triethoxysilane, aminopropyltriethoxy dimethoxysilane, aminoethylaminopropyl Trimethoxy silane, aminoethylaminopropyl triethoxyl silane, aminoethyl aminomethyl triethoxyl silane, glycidoxy-propyltrimethoxy silane and ureido-propyl Trimethoxy silane.
The catalyzer raw material that automobile silicane-modified polyurethane seal gum of the present invention uses is at least one in dibutyl tin laurate, dibutyl tin acetate, dibutyl two toxilic acid tin, dibutyl tin dioctoate, stannous octoate, tetra isopropyl titanate and tetra-n-butyl titanic acid ester.
The oxidation inhibitor raw material that automobile silicane-modified polyurethane seal gum of the present invention uses is 2,6-ditertbutylparacresol, tetramethylene β-(3,5-di-tert-butyl-hydroxy phenyl) at least one in propionate and the tertiary octyl diphenylamine of 4,4`-bis-.
Present invention also offers a kind of method preparing above-mentioned automobile silicane-modified polyurethane seal gum, it comprises the following steps:
(1) the silicane-modified polyurethane polymkeric substance of 100 weight parts, the softening agent of 20 ~ 100 weight parts are added in stirrer, under temperature 80 ~ 90 DEG C, vacuum tightness 0.06 ~ 0.09MPa condition, be uniformly mixed 10 ~ 30 minutes;
(2) mixture obtained after step (1) being uniformly mixed is cooled to less than 60 DEG C, stops vacuumizing and stirring, and adds the filler of 20 ~ 300 weight parts, is uniformly mixed 30 ~ 60 minutes;
(3) in the mixture obtained after step (2) is uniformly mixed, add the strengthening agent of 50 ~ 200 weight parts, the oxidation inhibitor of 0.1 ~ 1 weight part, dewater under temperature 100 ~ 120 DEG C, vacuum tightness 0.06 ~ 0.09MPa condition blended 60 ~ 120 minutes;
(4) step (3) is dewatered blended after the mixture that obtains be cooled to less than 50 DEG C, stop vacuumizing and stirring, add the linking agent of 5 ~ 30 weight parts, the tackifier of 0.5 ~ 2 weight part, the catalyzer of 0.1 ~ 2 weight part, under vacuum tightness 0.06 ~ 0.09MPa condition, be uniformly mixed 10 ~ 30 minutes, obtain automobile silicane-modified polyurethane seal gum.
In order to obtain over-all properties better automobile silicane-modified polyurethane seal gum, sealing glue is raw material by following material by weight:
And adopt the method preparation comprising following steps:
(1) the silicane-modified polyurethane polymkeric substance of 100 weight parts, the softening agent of 20 ~ 90 weight parts are added in stirrer, under temperature 80 ~ 90 DEG C, vacuum tightness 0.08 ~ 0.09MPa condition, be uniformly mixed 15 ~ 30 minutes;
(2) mixture obtained after step (1) being uniformly mixed is cooled to less than 60 DEG C, stops vacuumizing and stirring, and adds the filler of 100 ~ 150 weight parts, is uniformly mixed 40 ~ 50 minutes;
(3) in the mixture obtained after step (2) is uniformly mixed, add the strengthening agent of 100 ~ 150 weight parts, the oxidation inhibitor of 0.1 ~ 1 weight part, dewater under temperature 100 ~ 120 DEG C, vacuum tightness 0.07 ~ 0.085MPa condition blended 90 ~ 100 minutes;
(4) step (3) is dewatered blended after the mixture that obtains be cooled to less than 50 DEG C, stop vacuumizing and stirring, add the linking agent of 8 ~ 15 weight parts, the tackifier of 1 ~ 2 weight part, the catalyzer of 0.5 ~ 2 weight part, under vacuum tightness 0.08 ~ 0.09MPa condition, be uniformly mixed 10 ~ 20 minutes, obtain automobile silicane-modified polyurethane seal gum.
Compared with prior art, the present invention has following beneficial effect:
1, automobile silicane-modified polyurethane seal gum mechanical property of the present invention improves further, and according to the adjustment of tackifier kind and consumption, mechanical property is adjustable in relative broad range, can select more suitably sealant material for the different parts of automobile.
2, automobile silicane-modified polyurethane seal gum of the present invention adds special strengthening agent, and water resistance is excellent, improves safety, the comfortableness of automobilism further.
3, automobile silicane-modified polyurethane seal gum preparation technology of the present invention is simple, bonding strength is large, ageing-resistant performance is excellent, system environmental protection, can meet the requirement of Automobile sealant.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment and comparative example, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In following each embodiment, the measure unit " part " of each material refers to weight part.
Embodiment 1
The silicane-modified polyurethane 100 parts of triethoxyl silane end-blocking, Di Iso Decyl Phthalate 15 parts, dioctyl phthalate (DOP) 5 parts are added in stirrer, temperature 80 DEG C, under vacuum tightness 0.09MPa, is uniformly mixed 15 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add 40 parts, calcium carbonate, titanium dioxide 40 parts, carbon black 10 parts, gas-phase silica 10 parts, be uniformly mixed 40 minutes; Add liquid isoprene-isobutylene rubber 80 parts, liquid isoprene rubber 20 parts, tetramethylene β-(3,5-di-tert-butyl-hydroxy phenyl) propionate 0.5 part, temperature 120 DEG C, vacuum tightness 0.07MPa, dewaters blended 100 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltrimethoxy silane 12 parts, vinyltriethoxysilane 3 parts, ureido-propyl Trimethoxy silane 1 part, dibutyl tin laurate 0.8 part, stannous octoate 0.2 part, 20 minutes are uniformly mixed under vacuum tightness 0.085MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Embodiment 2
The silicane-modified polyurethane 100 parts of Trimethoxy silane end-blocking, diisononyl phthalate 50 parts, dioctyl phthalate (DOP) 25 parts are added in stirrer, temperature 80 DEG C, under vacuum tightness 0.06MPa, is uniformly mixed 30 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add 25 parts, calcium carbonate, talcum powder 20 parts, gas-phase silica 5 parts, be uniformly mixed 60 minutes; Add liquid styrene butadiene rubber 55 parts, 2,6 ditertiary butyl p cresol 0.2 part, temperature 100 DEG C, vacuum tightness 0.06MPa, dewaters blended 120 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltrimethoxy silane 5 parts, aminopropyl trimethoxysilane 0.5 part, dibutyl tin acetate 0.5 part, 15 minutes are uniformly mixed under vacuum tightness 0.09MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Embodiment 3
The silicane-modified polyurethane 50 parts of Trimethoxy silane end-blocking, the silicane-modified polyurethane 50 parts of triethoxyl silane end-blocking, dimixo-octyl phthalate 50 parts, butyl benzyl phthalate 50 parts are added in stirrer, temperature 90 DEG C, under vacuum tightness 0.08MPa, be uniformly mixed 10 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add carbon black 50 parts, organobentonite 50 parts, titanium dioxide 30 parts, talcum powder 30 parts, gas-phase silica 10 parts, be uniformly mixed 55 minutes; Add liquid isoprene-isobutylene rubber 80 parts, 2,6 ditertiary butyl p cresol 0.1 part, 4,4`-bis-tertiary octyl diphenylamine 0.5 part, temperature 110 DEG C, vacuum tightness 0.09MPa, dewaters blended 60 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add methyltrimethoxy silane 10 parts, vinyltriethoxysilane 10 parts, aminoethylaminopropyl Trimethoxy silane 1 part, dibutyl tin dioctoate 0.5 part, tetra isopropyl titanate 0.3 part, 10 minutes are uniformly mixed under vacuum tightness 0.08MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Embodiment 4
The silicane-modified polyurethane 100 parts of triethoxyl silane end-blocking, diethyl phthalate 30 parts, dibutyl phthalate 20 parts are added in stirrer, temperature 85 DEG C, under vacuum tightness 0.085MPa, is uniformly mixed 15 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add 200 parts, calcium carbonate, carbon black 50 parts, organobentonite 50 parts, be uniformly mixed 30 minutes; Add liquid styrene butadiene rubber 100 parts, liquid acrylonitrile butadiene rubber 60 parts, 4,4`-bis-tertiary octyl diphenylamine 0.8 part, temperature 100 DEG C, vacuum tightness 0.085MPa, dewaters blended 90 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltrimethoxy silane 15 parts, anilinomethyl triethoxysilane 5 parts, aminopropyl trimethoxysilane 1 part, aminopropyl triethoxysilane 0.8 part, aminoethyl aminomethyl triethoxyl silane 0.2 part, tetra-n-butyl titanic acid ester 0.1 part, 30 minutes are uniformly mixed under vacuum tightness 0.06MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Embodiment 5
The silicane-modified polyurethane 100 parts of Trimethoxy silane end-blocking, Di Iso Decyl Phthalate 90 parts are added in stirrer, temperature 90 DEG C, under vacuum tightness 0.08MPa, is uniformly mixed 20 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add 60 parts, calcium carbonate, carbon black 60 parts, gas-phase silica 30 parts, be uniformly mixed 50 minutes; Add liquid isoprene-isobutylene rubber 90 parts, liquid styrene butadiene rubber 60 parts, 2,6-ditertbutylparacresol 0.3 part, tetramethylene β-(3,5-di-tert-butyl-hydroxy phenyl) propionate 0.7 part, temperature 100 DEG C, vacuum tightness 0.08MPa, dewaters blended 100 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltrimethoxy silane 8 parts, ureido-propyl Trimethoxy silane 2 parts, 0.3 part, dibutyl two toxilic acid tin, tetra-n-butyl titanic acid ester 0.2 part, 10 minutes are uniformly mixed under vacuum tightness 0.09MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Embodiment 6
The silicane-modified polyurethane 100 parts of Trimethoxy silane end-blocking, diisobutyl phthalate 20 parts, Di Iso Decyl Phthalate 10 parts are added in stirrer, temperature 80 DEG C, under vacuum tightness 0.075MPa, is uniformly mixed 20 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add titanium dioxide 40 parts, carbon black 20 parts, talcum powder 20 parts, be uniformly mixed 40 minutes; Add liquid isoprene-isobutylene rubber 100 parts, liquid styrene butadiene rubber 50 parts, liquid isoprene rubber 50 parts, tetramethylene β-(3,5-di-tert-butyl-hydroxy phenyl) propionate 0.1 part, temperature 100 ~ 120 DEG C, vacuum tightness 0.075MPa, dewaters blended 80 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltrimethoxy silane 25 parts, Union carbide A-162 5 parts, aminoethylaminopropyl Trimethoxy silane 0.5 part, dibutyl tin laurate 0.1 part, 18 minutes are uniformly mixed under vacuum tightness 0.09MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Embodiment 7
The silicane-modified polyurethane 100 parts of triethoxyl silane end-blocking, diisononyl phthalate 80 parts, Di Iso Decyl Phthalate 10 parts are added in stirrer, temperature 90 DEG C, under vacuum tightness 0.09MPa, is uniformly mixed 12 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add filler-calcium carbonate 150 parts, titanium dioxide 30 parts, gas-phase silica 30 parts, be uniformly mixed 30 minutes; Add liquid isoprene-isobutylene rubber 25 parts, liquid isoprene rubber 25 parts, 2,6 ditertiary butyl p cresol 0.5 part, temperature 100 DEG C, vacuum tightness 0.09MPa, dewaters blended 80 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltriethoxysilane 20 parts, methyltrimethoxy silane 5 parts, aminopropyl triethoxysilane 0.5 part, glycidoxy-propyltrimethoxy silane 0.1 part, dibutyl tin laurate 0.8 part, dibutyl tin acetate 0.8 part, tetra-n-butyl titanic acid ester 0.4 part, 20 minutes are uniformly mixed under vacuum tightness 0.09MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Embodiment 8
The silicane-modified polyurethane 100 parts of Trimethoxy silane end-blocking, dioctyl phthalate (DOP) 80 parts are added in stirrer, temperature 90 DEG C, under vacuum tightness 0.085MPa, is uniformly mixed 30 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add 60 parts, calcium carbonate, carbon black 30 parts, organobentonite 25 parts, gas-phase silica 5 parts, be uniformly mixed 40 minutes; Add liquid isoprene-isobutylene rubber 80 parts, liquid acrylonitrile butadiene rubber 40 parts, tetramethylene β-(3,5-di-tert-butyl-hydroxy phenyl) propionate 0.2 part, 4,4`-bis-tertiary octyl diphenylamine 0.2 part, temperature 110 DEG C, vacuum tightness 0.085MPa, dewaters blended 90 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltrimethoxy silane 12 parts, aminopropyl trimethoxysilane 1 part, ureido-propyl Trimethoxy silane 0.5 part, dibutyl tin laurate 1 part, stannous octoate 0.6 part, 20 minutes are uniformly mixed under vacuum tightness 0.085MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Comparative example 1 (not using strengthening agent)
The silicane-modified polyurethane 100 parts of Trimethoxy silane end-blocking, Di Iso Decyl Phthalate 15 parts, dioctyl phthalate (DOP) 5 parts are added in stirrer, temperature 80 DEG C, under vacuum tightness 0.09MPa, is uniformly mixed 15 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add 40 parts, calcium carbonate, titanium dioxide 40 parts, carbon black 10 parts, gas-phase silica 10 parts, be uniformly mixed 40 minutes; Add tetramethylene β-(3,5-di-tert-butyl-hydroxy phenyl) propionate 0.5 part, temperature 120 DEG C, vacuum tightness 0.07MPa, dewaters blended 100 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltrimethoxy silane 12 parts, vinyltriethoxysilane 3 parts, ureido-propyl Trimethoxy silane 1 part, dibutyl tin laurate 0.8 part, stannous octoate 0.2 part, 20 minutes are uniformly mixed under vacuum tightness 0.085MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
Comparative example 2 (not using tackifier)
The silicane-modified polyurethane 100 parts of triethoxyl silane end-blocking, Di Iso Decyl Phthalate 90 parts are added in stirrer, temperature 90 DEG C, under vacuum tightness 0.08MPa, is uniformly mixed 20 minutes; Be cooled to less than 60 DEG C, stop vacuumizing and stirring, add 60 parts, calcium carbonate, carbon black 60 parts, gas-phase silica 30 parts, be uniformly mixed 50 minutes; Add liquid isoprene-isobutylene rubber 90 parts, liquid styrene butadiene rubber 60 parts, 2,6-ditertbutylparacresol 0.3 part, tetramethylene β-(3,5-di-tert-butyl-hydroxy phenyl) propionate 0.7 part, temperature 100 DEG C, vacuum tightness 0.08MPa, dewaters blended 100 minutes; Be cooled to less than 50 DEG C, stop vacuumizing and stirring, add vinyltrimethoxy silane 8 parts, 0.3 part, dibutyl two toxilic acid tin, tetra-n-butyl titanic acid ester 0.2 part, 10 minutes are uniformly mixed under vacuum tightness 0.09MPa, obtain automobile silicane-modified polyurethane seal gum, the test result details of product performance are shown in Table 1.
The automobile silicane-modified polyurethane seal gum that the various embodiments described above are obtained, test seal gum performance when not doing any process to it, then under 120 DEG C of conditions, placement 24 hours, UV300 test its performance after irradiating 24 lab scales again.During test performance, test surface drying time by GB/T 13477, by GB/T528 test tensile strength and elongation at break, test shearing resistance by GB/T 7124, test impermeability by GB/T 23445, test result is as shown in Table 1 below.
Table 1 automobile silicane-modified polyurethane seal gum the performance test results
Result shows, by not made in accordance with the present invention automobile silicane-modified polyurethane seal gum compare with automobile silicane-modified polyurethane seal gum made in accordance with the present invention, automobile silicane-modified polyurethane seal gum mechanical strength of the present invention is higher, anti-permeability performance is more excellent, and mechanical property is adjustable in relative broad range.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of and claim open in the application, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (10)
1. an automobile silicane-modified polyurethane seal gum, is characterized in that sealing glue is made up of following raw material by weight:
2. automobile silicane-modified polyurethane seal gum according to claim 1, is characterized in that described silicane-modified polyurethane polymkeric substance is the silicane-modified polyurethane of Trimethoxy silane end-blocking, the silicane-modified polyurethane of triethoxyl silane end-blocking or the mixture of the two.
3. automobile silicane-modified polyurethane seal gum according to claim 1, is characterized in that described softening agent is at least one in dimixo-octyl phthalate, diisobutyl phthalate, Di Iso Decyl Phthalate, diisononyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate (DOP), butyl benzyl phthalate.
4. automobile silicane-modified polyurethane seal gum according to claim 1, is characterized in that described filler is at least one in calcium carbonate, gas-phase silica, titanium dioxide, carbon black, talcum powder, organobentonite.
5. automobile silicane-modified polyurethane seal gum according to claim 1, is characterized in that described strengthening agent is at least one in liquid isoprene-isobutylene rubber, liquid styrene butadiene rubber, liquid acrylonitrile butadiene rubber, liquid isoprene rubber.
6. automobile silicane-modified polyurethane seal gum according to claim 1, is characterized in that described linking agent is at least one in methyltrimethoxy silane, Union carbide A-162, vinyltrimethoxy silane, vinyltriethoxysilane, anilinomethyl triethoxysilane.
7. automobile silicane-modified polyurethane seal gum according to claim 1, is characterized in that described tackifier are at least one in aminopropyl trimethoxysilane, aminopropyl triethoxysilane, aminopropyltriethoxy dimethoxysilane, aminoethylaminopropyl Trimethoxy silane, aminoethylaminopropyl triethoxyl silane, aminoethyl aminomethyl triethoxyl silane, glycidoxy-propyltrimethoxy silane and ureido-propyl Trimethoxy silane.
8. automobile silicane-modified polyurethane seal gum according to claim 1, is characterized in that described catalyzer is at least one in dibutyl tin laurate, dibutyl tin acetate, dibutyl two toxilic acid tin, dibutyl tin dioctoate, stannous octoate, tetra isopropyl titanate and tetra-n-butyl titanic acid ester.
9. automobile silicane-modified polyurethane seal gum according to claim 1, it is characterized in that described oxidation inhibitor is 2,6-ditertbutylparacresol, tetramethylene β-(3,5-di-tert-butyl-hydroxy phenyl) at least one in propionate and the tertiary octyl diphenylamine of 4,4`-bis-.
10. prepare a method for automobile silicane-modified polyurethane seal gum as claimed in any one of claims 1 to 9 wherein, it is characterized in that it comprises the following steps:
(1) the silicane-modified polyurethane polymkeric substance of 100 weight parts, the softening agent of 20 ~ 100 weight parts are added in stirrer, under temperature 80 ~ 90 DEG C, vacuum tightness 0.06 ~ 0.09MPa condition, be uniformly mixed 10 ~ 30 minutes;
(2) mixture obtained after step (1) being uniformly mixed is cooled to less than 60 DEG C, stops vacuumizing and stirring, and adds the filler of 20 ~ 300 weight parts, is uniformly mixed 30 ~ 60 minutes;
(3) in the mixture obtained after step (2) is uniformly mixed, add the strengthening agent of 50 ~ 200 weight parts, the oxidation inhibitor of 0.1 ~ 1 weight part, dewater under temperature 100 ~ 120 DEG C, vacuum tightness 0.06 ~ 0.09MPa condition blended 60 ~ 120 minutes;
(4) step (3) is dewatered blended after the mixture that obtains be cooled to less than 50 DEG C, stop vacuumizing and stirring, add the linking agent of 5 ~ 30 weight parts, the tackifier of 0.5 ~ 2 weight part, the catalyzer of 0.1 ~ 2 weight part, under vacuum tightness 0.06 ~ 0.09MPa condition, be uniformly mixed 10 ~ 30 minutes, obtain automobile silicane-modified polyurethane seal gum.
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| CN115466595A (en) * | 2022-11-07 | 2022-12-13 | 河南瑞朗达新材料有限公司 | Bi-component modified silicone rubber adhesive for bonding automobile cabin door and preparation method and bonding process thereof |
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