CN107629733B - A kind of environmentally friendly weld joint sealant and preparation method thereof - Google Patents
A kind of environmentally friendly weld joint sealant and preparation method thereof Download PDFInfo
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- CN107629733B CN107629733B CN201710858745.5A CN201710858745A CN107629733B CN 107629733 B CN107629733 B CN 107629733B CN 201710858745 A CN201710858745 A CN 201710858745A CN 107629733 B CN107629733 B CN 107629733B
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Abstract
This application discloses a kind of environmentally friendly weld joint sealants and preparation method thereof, wherein weld joint sealant is prepared by following raw material: 15-25 parts of DINCH, 5-10 parts of TBC, 12-15 parts of PVC paste resin, 2-5 parts of vinyl chloride-vinyl acetate resin, 1-2 parts of adhesion promoter, 3-5 parts of diluent, 20-30 parts of nanofiller, 15-25 parts of powdered whiting, 1-5 parts of hygroscopic agent, 0-1 parts of thixotropic agent, 0.8-2.5 parts of stabilizer.The application is according to the performance requirement of product, selection two kinds of plasticizer of DINCH and TBC are applied in proper proportions, cooperate PVC paste resin and the two different kinds of PVC material of main part of vinyl chloride-vinyl acetate resin, selection other components prepare weld joint sealant, without containing adjacent benezene material in product, after vehicle body smearing, with car body overbaking line, it is plasticized after heated, plays waterproof, sealing, shockproof effect.
Description
Technical field
The application belongs to Automobile sealant technical field, is related to a kind of environmentally friendly weld joint sealant and its preparation side
Method.
Background technique
Automobile weld joint sealant material based on PVC, and considering for price and plasticizing effect, it is domestic still with
DOP (diisooctyl phthalate) is primary plasticizer, and external many developed countries are very actually before more than 10 years
It is multi-field to be forbidden to use adjacent benzene class plasticizer.Weld joint sealant mainly plays waterproof, close using overlapped the position of outer steel plate in the car
Envelope, shockproof effect, but DOP can be escaped from PVC product over time, into air, soil or even food, especially
It is smeared weld joint sealant DOP in the car and escapes directly by human contact.The acute toxicity of DOP is very low, short after human body intake
Almost without the performance of poisoning in time, but its chronic toxicity is especially big to human injury, external zooscopy result
Show that DOP can lead to that animal survival rate reduction, weight loss, hepatic and renal function decline, red blood cell is reduced in blood, have mutagenicity
And carcinogenicity.
There are many existing environment-friendlyplasticizer plasticizers, but existing lower-cost environment-friendlyplasticizer plasticizer is all because of certain originals
Because may not apply to weld joint sealant.Such as DINCH (hexamethylene 1,2- dioctyl phthalate diisononyl esters) and TBC (tributyl citrate)
All it is environment-friendlyplasticizer plasticizer, is all tested by rigorous toxicity, is can be applicable in food and medical treatment.But DINCH and TBC
It cannot be used for weld joint sealant, because DINCH is incomplete to PVC plasticization, product embrittlement after plasticizing, elongation at break is very low,
And elongation at break is especially high after the plasticizing of TBC plasticized PVC, but product stability is poor.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of environmentally friendly weld joint sealant and its system
Preparation Method.
In a first aspect, the application provides a kind of environmentally friendly weld joint sealant, it is prepared by following raw material:
The application selects two kinds of plasticizer of DINCH and TBC to apply in proper proportions, matches according to the performance requirement of product
PVC paste resin and the two different kinds of PVC material of main part of vinyl chloride-vinyl acetate resin are closed, other components is selected to prepare weld joint sealant, is produced
It without containing adjacent benezene material in product, after vehicle body smearing, with car body overbaking line, is plasticized after heated, plays waterproof, sealing, prevents
The effect of shake.Vinyl chloride-vinyl acetate resin is mixed with PVC paste resin, not only can guarantee the good thermal stability chemical stability of product, but also can protect
Demonstrate,prove the enough intensity of product and toughness.
Preferably, the adhesion promoter is Versamid.The more other adhesion promoters of Versamid
It can be faster and better Nian Jie with the electrophoretic coating of automobile electrophoresis plate.
Preferably, the stabilizer is zinc oxide.Zinc oxide can be used as the stabilizer of Versamid, prevent high temperature from drying
Weld seam glue xanthochromia when roasting, influences japanning appearance.
Preferably, the diluent is cyclic alkane solvents oil.Cycloalkane can prevent storage period longer Shi Rong after gluing
Agent is precipitated, and influences later period japanning.
Preferably, the thixotropic agent is gas-phase silica.
Preferably, the nanofiller is nanometer calcium carbonate.Nanometer calcium carbonate can play the role of certain thixotropic agent, when
When using nanometer calcium carbonate as nanofiller, thixotropic agent can no longer be used alone, simplify formula.
Preferably, environmentally friendly weld joint sealant is prepared by following raw material:
Preferably, environmentally friendly weld joint sealant is prepared by following raw material:
Second aspect, the application also provide a kind of preparation method of above-mentioned environmentally friendly weld joint sealant, including following
Step:
Diluent, DINCH and TBC, adhesion promoter: being added in stirred tank by S1 in proportion at 18 DEG C -40 DEG C,
First stirring 3-5min；Hygroscopic agent, stabilizer, PVC paste resin, vinyl chloride-vinyl acetate resin are added, 3-5min is again stirring for；It is added later
Nanofiller and powdered whiting, high speed dispersion 2-5min obtain finely dispersed material；
S2: finely dispersed material obtained in step S1 is passed through into three-roll grinder；
S3: the material stirring after grinding that step S2 is obtained uniformly is placed for 24 hours afterwards, then carries out viscosity adjustment；
S4: viscosity is adjusted to OK range, vacuumizes 20-30min, vacuum pressure be -0.06Mpa~-
0.09MPa removes the bubble in product.
Entire stirring, dispersion process need to monitor temperature of charge no more than 40 DEG C, prevent material due to the excessively high appearance of temperature
Hardening phenomenon.
Preferably, it also needs that thixotropic agent is added before stirring for the first time in step S1.
The application has the advantages and positive effects of: since the application uses technical solution as above, vinyl chloride-vinyl acetate resin and PVC
It is mixed according to proper proportion to paste resin, not only can guarantee the good thermal stability chemical stability of product, but also can guarantee that product is enough
Intensity and toughness.According to the performance requirement of product, two kinds of plasticizer of DINCH and TBC is selected to apply in proper proportions, cooperated
PVC paste resin and the two different kinds of PVC material of main part of vinyl chloride-vinyl acetate resin select other components to prepare weld joint sealant, product
In without containing adjacent benezene material, after vehicle body smearing, with car body overbaking line, be plasticized after heated, play waterproof, sealing, shockproof
Effect.
The technical issues of in addition to the application described above solution, constitutes the technical characteristic of technical solution and by these
Except advantage brought by the technical characteristic of technical solution, wrapped in other technologies problem that the application can solve, technical solution
Advantage brought by the other technical characteristics contained and these technical characteristics, will hereinafter be described in further detail.
Specific embodiment
The application is described in further detail below with reference to embodiment.It is understood that tool described herein
Body embodiment is used only for explaining related invention, rather than the restriction to the invention.It should be noted that the case where not conflicting
Under, the features in the embodiments and the embodiments of the present application can be combined with each other.This is described in detail below in conjunction with embodiment
Application.
Embodiment 1
30g cyclic alkane solvents oil, 180g DINCH and 60g TBC, 12g Versamid are added at 18 DEG C -40 DEG C
Enter into stirred tank, stirs 3-5min for the first time；Add 30g calcium oxide, 17g zinc oxide, 140g PVC paste resin, 40g chlorine vinegar
Resin is again stirring for 3-5min；220g nanometer calcium carbonate and 250g powdered whiting are added later, high speed dispersion 2-5min will
Finely dispersed material passes through three-roll grinder；Material stirring after grinding is uniformly placed for 24 hours afterwards, then passes through addition
DINCH carries out viscosity adjustment；Viscosity is adjusted to OK range, vacuumize 20-30min (vacuum pressure be -0.06Mpa~-
It is tested for the property after 0.09MPa).
Embodiment 2
In proportion by 50g cyclic alkane solvents oil, 210g DINCH and 80g TBC, 20g low molecular weight polycaprolactone at 18 DEG C -40 DEG C
Amide is added in stirred tank, stirs 3-5min for the first time；Add 50g calcium oxide, 25g zinc oxide, 150g PVC paste resin,
50g vinyl chloride-vinyl acetate resin, 10g gas-phase silica, is again stirring for 3-5min；260g nanometer calcium carbonate and 220g heavy carbonic acid are added later
Finely dispersed material is passed through three-roll grinder by calcium, high speed dispersion 2-5min；Material stirring after grinding is uniformly placed afterwards
For 24 hours, viscosity adjustment then is carried out by the way that DINCH is added；Viscosity is adjusted to OK range, 20-30min (vacuum is vacuumized
Pressure be -0.06Mpa~-0.09MPa) after be tested for the property.
Embodiment 3
50g cyclic alkane solvents oil, 150g DINCH and 50g TBC, 10g Versamid are added at 18 DEG C -40 DEG C
Enter into stirred tank, stirs 3-5min for the first time；Add 10g calcium oxide, 8g zinc oxide, 120g PVC paste resin, 20g chlorine vinegar tree
Rouge, 5g gas-phase silica, is again stirring for 3-5min；200g nanometer calcium carbonate and 150g powdered whiting, high speed point are added later
2-5min is dissipated, finely dispersed material is passed through into three-roll grinder；For 24 hours, then material stirring after grinding is uniformly placed afterwards
Viscosity adjustment is carried out by the way that DINCH is added；Viscosity is adjusted to OK range, vacuumize 20-30min (vacuum pressure be-
0.06Mpa~-0.09MPa) after be tested for the property.
It is as follows that the application also provides two comparative examples.
Comparative example 1
By 50g cyclic alkane solvents oil, 100g DINCH and 100g TBC, 20g blocked isocyanate class at 18 DEG C -40 DEG C
Adhesion promoter is added in stirred tank, stirs 3-5min for the first time；Add 10g calcium oxide, 120g PVC paste resin, 5g gas
Phase white carbon black, is again stirring for 3-5min；200g nanometer calcium carbonate and 150g powdered whiting, high speed dispersion 2- are added later
Finely dispersed material is passed through three-roll grinder by 5min；Material stirring after grinding is uniformly placed for 24 hours afterwards, is then carried out
Viscosity adjustment；Viscosity is adjusted to OK range, 20-30min is vacuumized (vacuum pressure is -0.06Mpa~-0.09MPa)
After be tested for the property.
Comparative example 2
By 50g linear paraffin solvent naphtha, 300g DINCH and 30g TBC, 20g Versamid at 18 DEG C -40 DEG C
It is added in stirred tank, stirs 3-5min for the first time；Add 10g calcium oxide, 25g zinc oxide, 100g PVC paste resin, 150g chlorine
Vinegar resin, 5g gas-phase silica, is again stirring for 3-5min；200g nanometer calcium carbonate and 150g powdered whiting are added later, it is high
Speed dispersion 2-5min, passes through three-roll grinder for finely dispersed material；Material stirring after grinding is uniformly placed afterwards for 24 hours,
Then viscosity adjustment is carried out；Viscosity is adjusted to OK range, vacuumize 20-30min (vacuum pressure be -0.06Mpa~-
It is tested for the property after 0.09MPa).
Test result
Performance test is carried out to above-described embodiment 1-3 and comparative example 1-2, test result and test condition are as shown in table 1.
1 the performance test results of table
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (10)
1. a kind of environmentally friendly weld joint sealant, which is characterized in that be prepared by following raw material:
2. environmentally friendly weld joint sealant according to claim 1, which is characterized in that the adhesion promoter is low
Molecular polyamide.
3. environmentally friendly weld joint sealant according to claim 2, which is characterized in that the stabilizer is zinc oxide.
4. environmentally friendly weld joint sealant according to claim 1, which is characterized in that the diluent is that cycloalkane is molten
Agent oil.
5. environmentally friendly weld joint sealant according to claim 1, which is characterized in that the thixotropic agent is gas phase hard charcoal
It is black.
6. environmentally friendly weld joint sealant according to claim 1, which is characterized in that the nanofiller is nano-sized carbon
Sour calcium.
7. environmentally friendly weld joint sealant according to claim 1, which is characterized in that prepared by following raw material
It forms:
8. environmentally friendly weld joint sealant according to claim 1, which is characterized in that prepared by following raw material
It forms:
9. a kind of preparation method of such as described in any item environmentally friendly weld joint sealants of claim 1-8, which is characterized in that
The following steps are included:
S1: diluent, DINCH and TBC, adhesion promoter are added in stirred tank in proportion at 18 DEG C -40 DEG C, for the first time
Stir 3-5min；Hygroscopic agent, stabilizer, PVC paste resin, vinyl chloride-vinyl acetate resin are added, 3-5min is again stirring for；Nanometer is added later
Filler and powdered whiting, high speed dispersion 2-5min obtain finely dispersed material；
S2: finely dispersed material obtained in step S1 is passed through into three-roll grinder；
S3: the material stirring after grinding that step S2 is obtained uniformly is placed for 24 hours afterwards, viscosity is then adjusted to suitable model
It encloses；
S4: viscosity is adjusted to OK range, vacuumizes 20-30min, and vacuum pressure is -0.06Mpa~-0.09MPa.
10. the preparation method of environmentally friendly weld joint sealant according to claim 9, which is characterized in that in step S1
It also needs that thixotropic agent is added before first stirring.
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| CN201710858745.5A CN107629733B (en) | 2017-09-20 | 2017-09-20 | A kind of environmentally friendly weld joint sealant and preparation method thereof |
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| CN201710858745.5A CN107629733B (en) | 2017-09-20 | 2017-09-20 | A kind of environmentally friendly weld joint sealant and preparation method thereof |
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| CN111303803A (en) * | 2018-12-11 | 2020-06-19 | 保光(天津)汽车零部件有限公司 | Environment-friendly ultralow-specific-gravity weld joint sealant and preparation method thereof |
| CN111040672B (en) * | 2019-12-27 | 2021-08-10 | 保光(天津)汽车零部件有限公司 | Low-temperature curing type PVC sealant and preparation method thereof |
| CN116948563A (en) * | 2023-07-26 | 2023-10-27 | 盐城工学院 | Low-temperature cured aluminum plate PVC welding seam adhesive and preparation method thereof |
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| CN102757746B (en) * | 2012-06-14 | 2013-09-25 | 陕西中核大地实业有限公司 | Environment-friendly PVC (Poly Vinyl Chloride) weld joint sealant for vehicle |
| CN103254343A (en) * | 2013-04-26 | 2013-08-21 | 上海氯碱化工股份有限公司 | Preparation method of chloroethylene-vinyl acetate copolymer paste resins with uniform chemical compositions |
| CN104327783A (en) * | 2014-11-25 | 2015-02-04 | 三友（天津）高分子技术有限公司 | Anticorrosive sealant for hems in automobile manufacturing |
| CN105754260B (en) * | 2016-05-11 | 2017-10-27 | 江南大学 | A kind of PVC bottle cap sealants of the low amount of moving out and preparation method thereof |
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