CN1177009C - Modified water resistant low temperature white emulsoid - Google Patents
Modified water resistant low temperature white emulsoidInfo
- Publication number
- CN1177009C CN1177009C CNB021112924A CN02111292A CN1177009C CN 1177009 C CN1177009 C CN 1177009C CN B021112924 A CNB021112924 A CN B021112924A CN 02111292 A CN02111292 A CN 02111292A CN 1177009 C CN1177009 C CN 1177009C
- Authority
- CN
- China
- Prior art keywords
- low temperature
- polyvinyl alcohol
- resistant low
- water resistant
- vinyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Adhesives Or Adhesive Processes (AREA)
Abstract
The present invention belongs to the field of an adhesive, and discloses modified white emulsion with water resistance and low temperature resistance and a preparation method thereof. Polyvinyl acetate emulsion is used as base material, polyvinyl alcohol water solution is used as a colloid protective agent, ethene-vinyl acetate emulsion is used as a modifier with water resistance and low temperature resistance, and calcium carbonate and kaoline are used as cementing and reinforcing agents. According to the parts by weight of the components and the preparation method disclosed by the present invention, the modified white emulsion with water resistance and low temperature resistance can be prepared. Various technical indexes all exceed the standard of the chemical industry, and the modified white emulsion is an environment protection type product with the advantages of good water resistance performance, good low temperature resistance performance, low cost, no poison and no harm.
Description
Technical field:
The invention belongs to adhesive field, be specifically related to a kind of modified water resistant low temperature white glue with vinyl and preparation method thereof.
Background technology:
Venamul claims white glue with vinyl again.Nineteen twenty-nine comes out, and nineteen thirty-seven is carried out suitability for industrialized production, and the output of China's venamul is only second to urea-formaldehyde resin now, occupies second in the production of tackiness agent with in using.That this material has is easy to use, of many uses, produce series of advantages such as easy, can be widely used in the bonding of material in the numerous areas such as wood working, adhering fabric, furniture construction, wrapping material, building decoration, and market is boundless.
But because its molecular structure and manufacture characteristic, that venamul and glued membrane thereof exist is water-fast, lower temperature resistance is poor, the not high shortcoming of bonding strength, and also cost is higher, has influenced promoting the use of of it.So in recent years both at home and abroad all with the modification of venamul emphasis as research and development, and done a large amount of work, these work have overcome some deficiency of venamul, the improvement that its performance is obtained, but still have some defectives inevitably.Such as, some modification has improved certain single performance of venamul, but over-all properties can not get improving; The application limitation of the venamul after some modification is very big; Then cost is too high for some; More have when venamul is carried out the acetalation modification, what adopt is polyvinyl alcohol and the condensation reaction of formaldehyde under acidic conditions in the venamul, so product contains objectionable impurities formaldehyde inevitably, and this is not allow for present environmental protection concept.So, in order to adapt to rapid development of economy and to satisfy environmental protection requirement, need continue to seek the method for modifying of venamul, further expand its range of application.
Summary of the invention:
For overcoming above-mentioned defective, the present invention has taked the method for polymer blending, venamul is carried out the modification of over-all properties, in the experiment to several factors that may influence performance, adopted orthogonal test method to be optimized design, through more than hundred times test, developed a kind of new modified water resistant low temperature white glue with vinyl.
Through the scientific and technological achievement level report that Shanghai institute of scientific-technical information provided on March 8th, 2002, think that this achievement is near international most advanced level; The patent retrieval of providing is on the same day reported, does not find and the closely related patent of this object of invention.
The technical scheme that the present invention deals with problems is as follows:
A kind of modified water resistant low temperature white glue with vinyl; it is characterized in that it is is base-material with venamul PVAc; with polyvinyl alcohol water solution PVA is colloid protective agent; with ethylene-vinyl acetate emulsion EVA is water resistant low temperature properties-correcting agent; with lime carbonate and kaolin is that the bonding toughener carries out blend and forms, and wherein the parts by weight of each component are as follows:
Solid content is 30%～45% venamul PVAc:15～25;
Solid content is 40%～60% ethylene-vinyl acetate emulsion EVA:3～10;
Weight concentration is 8%～12% polyvinyl alcohol water solution PVA:5～10;
Lime carbonate: 3～8; Kaolin: 3～8.
The preparation method of described a kind of modified water resistant low temperature white glue with vinyl is characterized in that being preparation like this:
1. water is added in the existing reactor and heats, slowly add polyvinyl alcohol, stir, be warming up to 90～95 ℃, treat that polyvinyl alcohol dissolves fully after, be cooled to room temperature, make polyvinyl alcohol water solution;
2. in room temperature, add venamul and ethylene-vinyl acetate emulsion respectively under stirring, stir;
3. slowly add lime carbonate and kaolin then, stir and promptly made a kind of modified water resistant low temperature white glue with vinyl in 20～30 minutes.
The advantage that the present invention compared with prior art has is:
1. every technical indicator of the present invention has all surpassed the index request of chemical industry standard HG/T 2727-1995, and water resistance excellence, resistance to low temperature are good.
2. production technique of the present invention is simple, and cost is lower, and early stage cohesive strength height, tack is good, shrinking percentage is low, easy construction, and not containing formaldehyde and other objectionable impurities, is the non-toxic, environmental friendly product, is easy to promote the use of excellent economic and good social benefit.
3. applied range of the present invention can be applicable to the bonding of material in the numerous areas such as wood working, adhering fabric, furniture construction, wrapping material, building decoration.
Embodiment:
The present invention is base-material with the venamul; with polyvinyl alcohol is colloid protective agent; by water resistant low temperature properties-correcting agent ethylene-vinyl acetate emulsion and bonding toughener lime carbonate and the kaolin that adds certainweight at normal temperatures; adopt the method for polymer blending, venamul is carried out modification.Its excellent performance of water resistant low temperature white glue with vinyl that makes, lower temperature resistance is good, cohesive strength is high, cost is lower, and is the environmentally friendly machine that does not contain formaldehyde.
Embodiment 1:
1). the weight of modified water resistant low temperature white glue with vinyl each component is as follows:
Solid content is 37% venamul PVAc:300 gram;
Solid content is 60% ethylene-vinyl acetate emulsion EVA:60 gram;
Weight concentration is 12% polyvinyl alcohol water solution PVA:100 gram;
Lime carbonate: 60 grams; Kaolin: 60 grams.
2). the preparation process of modified water resistant low temperature white glue with vinyl is as follows:
1.. water added in the existing reactor heats, slowly add polyvinyl alcohol, stir, be warming up to 90 ℃, treat that polyvinyl alcohol dissolves fully after, be cooled to room temperature, make polyvinyl alcohol water solution;
2.. in room temperature, add venamul and ethylene-vinyl acetate emulsion respectively under stirring, stir;
3.. slowly add lime carbonate and kaolin then, stir and promptly made a kind of modified water resistant low temperature white glue with vinyl in 20 minutes.
The present invention and currently available products test result see Table 1:
Table 1
| Interventions Requested (unit) | The currently available products index | Test check result of the present invention |
| Outward appearance | Oyster white, no coarse particles and foreign matter | Oyster white, no coarse particles and foreign matter |
| PH value | 3～7 | 7 |
| Non-volatile matter, % | ≥35 | 53.7 |
| Minimum film-forming temperature, ℃ | ≤4 | 2.5 |
| The timber contaminative | The colour developing that applies ferrous sulfate is shallow | The colour developing that applies ferrous sulfate is shallow |
| Compression shear strength, MPa | Dry strength: 〉=6.9 | 7.2 |
| Compression shear strength, MPa | Wet tenacity: 〉=2.0 | 3.8 |
As known from Table 1, compression shear strength of the present invention (wet tenacity) is 3.8MPa, has increased 1.8MPa than the 2MPa of currently available products, and promptly water tolerance has improved 90%.Minimum film-forming temperature of the present invention is 2.5 ℃, and also 4 ℃ than currently available products have reduced by 37.5%.Thereby illustrate that the present invention all increases at the water resistant low temperature aspect of performance.
Embodiment 2:
1). the weight of modified water resistant low temperature white glue with vinyl each component is as follows:
Solid content is 45% venamul PVAc:500 gram;
Solid content is 40% ethylene-vinyl acetate emulsion EVA:200 gram;
Weight concentration is 10% polyvinyl alcohol water solution PVA:160 gram;
Lime carbonate: 160 grams; Kaolin: 100 grams.
2). the preparation process of modified water resistant low temperature white glue with vinyl is identical with embodiment 1, its technology difference from Example 1 is that the polyvinyl alcohol solvent temperature rises to 95 ℃, and the polymer blending churning time adopted 30 minutes, thereby made the modified water resistant low temperature white glue with vinyl.
The present invention and currently available products test result see Table 2:
Table 2
| Interventions Requested (unit) | The currently available products index | Test check result of the present invention |
| Outward appearance | Oyster white, no coarse particles and foreign matter | Oyster white, no coarse particles and foreign matter |
| PH value | 3～7 | 7 |
| Non-volatile matter, % | ≥35 | 57 |
| Minimum film-forming temperature, ℃ | ≤4 | 2 |
| The timber contaminative | The colour developing that applies ferrous sulfate is shallow | The colour developing that applies ferrous sulfate is shallow |
| Compression shear strength, MPa | Dry strength: 〉=6.9 | 7.5 |
| Compression shear strength, MPa | Wet tenacity: 〉=2.0 | 4.8 |
As known from Table 2, compression shear strength of the present invention (wet tenacity) is 4.8MPa, has increased 2.8MPa than the 2MPa of currently available products, and promptly water tolerance has improved 140%.Minimum film-forming temperature of the present invention is 2 ℃, and also 4 ℃ than currently available products have reduced by 50%.Thereby illustrate that the present invention improves a lot at the water resistant low temperature aspect of performance.
Embodiment 3:
1). the weight of modified water resistant low temperature white glue with vinyl each component is as follows:
Solid content is 30% venamul PVAc:400 gram;
Solid content is 50% ethylene-vinyl acetate emulsion EVA:100 gram;
Weight concentration is 8% polyvinyl alcohol water solution PVA:200 gram;
Lime carbonate: 100 grams; Kaolin: 160 grams.
2). the preparation process of modified water resistant low temperature white glue with vinyl is identical with embodiment 1, its technology difference from Example 1 is that the polyvinyl alcohol solvent temperature rises to 93 ℃, and the polymer blending churning time adopted 25 minutes, thereby made the modified water resistant low temperature white glue with vinyl.
The present invention and currently available products test result see Table 3:
Table 3
| Interventions Requested (unit) | The currently available products index | Test check result of the present invention |
| Outward appearance | Oyster white, no coarse particles and foreign matter | Oyster white, no coarse particles and foreign matter |
| PH value | 3～7 | 7 |
| Non-volatile matter, % | ≥35 | 55.8 |
| Minimum film-forming temperature, ℃ | ≤4 | 2 |
| The timber contaminative | The colour developing that applies ferrous sulfate is shallow | The colour developing that applies ferrous sulfate is shallow |
| Compression shear strength, MPa | Dry strength: 〉=6.9 | 7 |
| Compression shear strength, MPa | Wet tenacity: 〉=2.0 | 4.3 |
As known from Table 3, compression shear strength of the present invention (wet tenacity) is 4.3MPa, has increased 2.3MPa than the 2MPa of currently available products, and promptly water tolerance has improved 115%.Minimum film-forming temperature of the present invention is 2 ℃, and also 4 ℃ than currently available products have reduced by 50%.Thereby illustrate that the present invention is greatly improved at the water resistant low temperature aspect of performance.
Claims (2)
1. modified water resistant low temperature white glue with vinyl; it is characterized in that it is is base-material with venamul PVAc; with polyvinyl alcohol water solution PVA is colloid protective agent; with ethylene-vinyl acetate emulsion EVA is water resistant low temperature properties-correcting agent; with lime carbonate and kaolin is that the bonding toughener carries out blend and forms, and wherein the parts by weight of each component are as follows:
Solid content is 30%～45% venamul PVAc:15～25;
Solid content is 40%～60% ethylene-vinyl acetate emulsion EVA:3～10;
Weight concentration is 8%～12% polyvinyl alcohol water solution PVA:5～10;
Lime carbonate: 3～8; Kaolin: 3～8.
2. by the preparation method of the described a kind of modified water resistant low temperature white glue with vinyl of claim 1, it is characterized in that being preparation like this:
1). water added in the existing reactor heats, slowly add polyvinyl alcohol, stir, be warming up to 90～95 ℃, treat that polyvinyl alcohol dissolves fully after, be cooled to room temperature, make polyvinyl alcohol water solution;
2). in room temperature, add venamul and ethylene-vinyl acetate emulsion respectively under stirring, stir;
3). slowly add lime carbonate and kaolin then, stir and promptly made a kind of modified water resistant low temperature white glue with vinyl in 20～30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021112924A CN1177009C (en) | 2002-04-09 | 2002-04-09 | Modified water resistant low temperature white emulsoid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021112924A CN1177009C (en) | 2002-04-09 | 2002-04-09 | Modified water resistant low temperature white emulsoid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1377929A CN1377929A (en) | 2002-11-06 |
| CN1177009C true CN1177009C (en) | 2004-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021112924A Expired - Fee Related CN1177009C (en) | 2002-04-09 | 2002-04-09 | Modified water resistant low temperature white emulsoid |
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| Country | Link |
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| CN (1) | CN1177009C (en) |
Cited By (1)
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| CN103596989A (en) * | 2011-06-10 | 2014-02-19 | 塞拉尼斯乳液有限公司 | Vinyl ester/ethylene copolymer dispersions for use in adhesive formulations |
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-
2002
- 2002-04-09 CN CNB021112924A patent/CN1177009C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103596989A (en) * | 2011-06-10 | 2014-02-19 | 塞拉尼斯乳液有限公司 | Vinyl ester/ethylene copolymer dispersions for use in adhesive formulations |
| CN103596989B (en) * | 2011-06-10 | 2016-03-16 | 塞拉尼斯乳液有限公司 | For the vinyl ester/ethylene copolymer dispersion used in tackiness agent formulation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1377929A (en) | 2002-11-06 |
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