CN103556528A - High-barrier-property environment-friendly coating composition for non-aluminum lining paper and preparation method thereof - Google Patents
High-barrier-property environment-friendly coating composition for non-aluminum lining paper and preparation method thereof Download PDFInfo
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- CN103556528A CN103556528A CN201310464134.4A CN201310464134A CN103556528A CN 103556528 A CN103556528 A CN 103556528A CN 201310464134 A CN201310464134 A CN 201310464134A CN 103556528 A CN103556528 A CN 103556528A
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Abstract
The invention discloses a high-barrier-property environment-friendly coating composition for non-aluminum lining paper and a preparation method thereof. The coating composition includes the following components by weight: 30-55 parts of a self crosslinking acrylic emulsion, 20-35 parts of waterborne polyurethane, 10-25 parts of a cosolvent, 15-40 parts of deionized water, 0.2 part of a wetting agent, 0.2 part of a leveling agent and 0.1 part of a defoaming agent. When in preparing, the self crosslinking acrylic emulsion and the waterborne polyurethane are added into a reaction kettle for low-speed stirring to even; the cosolvent and the deionized water are mixed evenly and then added into the reaction kettle with stirring for low-speed stirring; the wetting agent and the leveling agent are sequentially added for medium-speed stirring; and the defoaming agent is added for high-speed stirring and filtering. A coating layer formed by the coating composition is excellent and stable in barrier property, the barrier property can meet the requirements by only one-time coating (the coating thickness >= 3 mum), coating application equipment is simple, and special coating equipment is not needed.
Description
Technical field
The present invention relates to water paint field, be specifically related to a kind of environment-friendly type for high barrier coating composition without aluminum casting paper and preparation method thereof.
Background technology
Internal lining paper, as one of important component part of cigarette packaging material, mainly plays a part to protect fragrance, protection against the tide, so requires cigarette lining paper to have certain barrier to air and steam; Cigarette lining paper mainly contains aluminium foil compound lining, transfer aluminum plated liner, vacuum and directly plates three kinds of forms of liner in the market, and three's common ground is exactly all to comprise one deck aluminium to reach the effect of obstruct.But have the following disadvantages: (1) all will consume non-ferrous metal aluminium, particularly aluminium foil composite smoke serves as a contrast, and aluminium belongs to non-renewable resources; (2) product can not be degradable after using, and uses aluminium to be difficult to reclaim and cause the wasting of resources; (3) produce aluminium foil or equipment cost that aluminum plating process is used is high, power consumption is large; (4) complex manufacturing, cost is high;
Accordingly, without calorize, become the developing direction of internal lining paper from now on, but can the key factor that be applied and promote without aluminum casting paper reach existing lining paper level with regard to its barrier, therefore develop a kind of environment-friendly type, high barrier coating, by the barrier improving without aluminum casting paper at this coating of body paper surface-coated, have great importance.
By the retrieval to existing document, find, Chinese patent CN102966001 discloses a kind of without aluminium cigarette lining paper and production method thereof, its barrier mainly polyvinyl alcohol in barrier layer and agar determines, but because of the water imbibition of polyvinyl alcohol, under high humidity environment, its barrier can reduce greatly; In addition, the membership that adds of agar causes greatly even gel of dope viscosity, needs special installation (reverse coating) to be coated with; Chinese patent CN102943416 discloses a kind of easy degraded cigarette lining paper with high obstructing performance, in its barrier layer, comprise polyvinylidene chloride (PVDC), in PVDC, contain chlorine element, when processing, castoff burning can produce the toxic gases such as chlorine, dioxin, it requires barrier layer thickness >5 μ m in addition, and cost is higher.
Summary of the invention
The object of the invention is to overcome the defect that above-mentioned prior art exists provides a kind of environment-friendly type for high barrier coating composition without aluminum casting paper and preparation method thereof.
The object of the invention is to be achieved through the following technical solutions:
The present invention relates to a kind of environment-friendly type for the high barrier coating composition without aluminum casting paper, comprise each component of following weight portion:
Preferably, the weight average molecular weight Mw scope of described self-crosslinking acrylic emulsion is 100,000～200,000; 30 ℃～60 ℃ of glass transition temperature (Tg) scopes; Minimum film formation temperature (MFT) is lower than 90 ℃; Under >=100 ℃ of heating >=10s conditions, cross-linking reaction can occur, form tridimensional network, in barrier layer, play the effect of skeleton, and this structure can keep the stable of structure in high humidity, relatively high temperature.
Preferably, described aqueous polyurethane weight average molecular weight Mw scope is 10,000～30,000; Soft section of part of strand is ordered structure; Soft section of part-structure is more regular, easily forms crystal structure in film forming procedure, and crystallization is more obvious, and coating barrier is better.In film forming procedure, because of its molecular weight, can be filled in the middle of self-crosslinking acrylic three-dimensional net structure; The soft section of regular easy forming section crystallization of part-structure, causes in institute's film forming free volume to reduce, and free volume be steam, gas molecule by the main thoroughfare of coating, so minimizing of free volume, can improve the barrier of coating; In addition between polyurethane molecular, can form the active force between hydrogen bond, static, Van der Waals force power equimolecular between polyurethane and self-crosslinking acrylic, this will further put forward the cohesion density of coating, and barrier is further enhanced.
Preferably, described cosolvent is one or more in ethanol, isopropyl alcohol, propylene glycol ethers.
Preferably, described wetting agent is anionic wetting agent or non-ionic wetting agent.
Preferably, described defoamer is one or more in modified polyorganosiloxane, non-ionic interfacial agent, modified silicone defoamer.
The invention still further relates to aforesaid environment-friendly type for the preparation method of the high barrier coating composition without aluminum casting paper, comprise the following steps:
Steps A, according to described component and weight portion, get the raw materials ready;
Step B, described self-crosslinking acrylic emulsion, aqueous polyurethane are dropped in reactor, stirring at low speed is even;
Step C, described cosolvent and deionized water are mixed after, in the situation that stirring, join in reactor stirring at low speed 5～10min;
Step D, in reactor, add successively described wetting agent, levelling agent, middling speed stirs 10～20min;
Step e, in reactor, add described defoamer, high-speed stirred 30～40min; Detection obtains sample solid finally filters containing, viscosity, obtains environment-friendly type for the high barrier coating without aluminum casting paper.
Preferably, the speed of described stirring at low speed is 300～500rpm; The speed that described middling speed stirs is 700～800rpm; The speed of described high-speed stirred is 1000～1200rpm.
Compared with prior art, the beneficial effect that the present invention has is:
(1) excellent performance: the coating barrier that the coating in the present invention forms is excellent, barrier is higher than current directly plating papers level;
(2) stable performance: the coating barrier property that the coating in the present invention forms is stable can keep stable under high humidity environment;
(3) cost advantage: only need coating once (thickness >=3 μ m) barrier just can reach requirement, application of paints equipment is simple, need not special coating apparatus;
(4) environment-friendly advantage: the coating in the present invention is water-based system, containing organic solvent, not chloride element, can be degradable.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
In the present invention, the weight average molecular weight Mw scope of described self-crosslinking acrylic emulsion is 100,000～200,000; 30 ℃～60 ℃ of glass transition temperature (Tg) scopes; Minimum film formation temperature (MFT) is lower than 90 ℃; Under >=100 ℃ of heating >=10s conditions, can there is cross-linking reaction, form tridimensional network.Described aqueous polyurethane weight average molecular weight Mw scope is 10,000～30,000; Soft section of part of strand is ordered structure.Described cosolvent is one or more in ethanol, isopropyl alcohol, propylene glycol ethers; In following examples, choose ethanol.Described wetting agent is anionic wetting agent or non-ionic wetting agent; In following examples, select anionic wetting agent.Described defoamer is one or more in modified polyorganosiloxane, non-ionic interfacial agent, modified silicone defoamer; In following examples, select modified polyorganosiloxane.
embodiment 1
The environment-friendly type of the present embodiment, for the high barrier coating composition without aluminum casting paper, comprises following component and content (weight portion):
Concrete preparation comprises the steps:
(1) according to above component and content (weight portion), get the raw materials ready;
(2) self-crosslinking acrylic emulsion, aqueous polyurethane drop in reactor, and low speed (300～500rpm) stirs;
(3) after cosolvent ethanol and deionized water are mixed, in the situation that stirring, join in reactor, 300～500rpm stirs 5～10min;
(4) in reactor, add successively wetting agent, levelling agent, middling speed (700～800rpm) stirs 10～20min;
(5) in reactor, add modified polyorganosiloxane defoamer, (1000～1200rpm) stirs 30～40 minutes at a high speed;
(6) that detects that above-mentioned steps obtains sample is solid containing, viscosity, finally filters and obtains environment-friendly type for the high barrier coating without aluminum casting paper.
embodiment 2
The environment-friendly type of the present embodiment, for the high barrier coating composition without aluminum casting paper, comprises following component and content (weight portion):
Concrete preparation comprises the steps:
(1) according to above component and content (weight portion), get the raw materials ready;
(2) self-crosslinking acrylic emulsion, aqueous polyurethane drop in reactor, and low speed (300～500rpm) stirs;
(3) after cosolvent isopropyl alcohol and deionized water are mixed, in the situation that stirring, join in reactor, 300～500rpm stirs 5～10min;
(4) in reactor, add successively wetting agent, levelling agent, middling speed (700～800rpm) stirs 10～20min;
(5) in reactor, add modified silicone defoamer, (1000～1200rpm) stirs 30～40 minutes at a high speed;
(6) that detects that above-mentioned steps obtains sample is solid containing, viscosity, finally filters and obtains environment-friendly type for the high barrier coating without aluminum casting paper.
embodiment 3
The environment-friendly type of the present embodiment, for the high barrier coating composition without aluminum casting paper, comprises following component and content (weight portion):
Concrete preparation comprises the steps:
(1) according to above component and content (weight portion), get the raw materials ready;
(2) self-crosslinking acrylic emulsion, aqueous polyurethane drop in reactor, and low speed (300～500rpm) stirs;
(3) after cosolvent propylene glycol and deionized water are mixed, in the situation that stirring, join in reactor, 300～500rpm stirs 5～10min;
(4) in reactor, add successively wetting agent, levelling agent, middling speed (700～800rpm) stirs 10～20min;
(5) in reactor, add non-ionic interfacial agent type defoamer, (1000～1200rpm) stirs 30～40 minutes at a high speed;
(6) that detects that above-mentioned steps obtains sample is solid containing, viscosity, finally filters and obtains environment-friendly type for the high barrier coating without aluminum casting paper.
comparative example 1
The coating composition of this comparative example is for comparing with embodiment 1, and it comprises following component and content (weight portion):
Concrete preparation comprises the steps:
(1) according to above component and content (weight portion), get the raw materials ready;
(2) self-crosslinking acrylic emulsion, aqueous polyurethane drop in reactor, and low speed (300～500rpm) stirs;
(3) after cosolvent ethanol and deionized water are mixed, in the situation that stirring, join in reactor, 300～500rpm stirs 5～10min;
(4) in reactor, add successively wetting agent, levelling agent, middling speed (700～800rpm) stirs 10～20min;
(5) in reactor, add modified polyorganosiloxane defoamer, (1000～1200rpm) stirs 30～40 minutes at a high speed;
(6) that detects that above-mentioned steps obtains sample is solid containing, viscosity, finally filters and obtains coating.
comparative example 2
The coating composition of this comparative example is for comparing with embodiment 2, and it comprises following component and content (weight portion):
Concrete preparation comprises the steps:
(1) according to above component and content (weight portion), get the raw materials ready;
(2) self-crosslinking acrylic emulsion, aqueous polyurethane drop in reactor, and low speed (300～500rpm) stirs;
(3) after cosolvent isopropyl alcohol and deionized water are mixed, in the situation that stirring, join in reactor, 300～500rpm stirs 5～10min;
(4) in reactor, add successively wetting agent, levelling agent, middling speed (700～800rpm) stirs 10～20min;
(5) in reactor, add modified silicone defoamer, (1000～1200rpm) stirs 30～40 minutes at a high speed;
(6) that detects that above-mentioned steps obtains sample is solid containing, viscosity, finally filters and obtains coating.
embodiment 6, performance test
By the coating composition of making by above-described embodiment 1～3 and comparative example 1,2, directly coat cigarette lining body paper (quantitatively 50g/m2) surface, dry measure 1.8～2.5g/m
2after the continuous drying film-forming of preference temperature (90 ℃～130 ℃) and time (8 seconds～15 seconds), place after 24h, adopt GB/T1038 and GB/T1037 to measure its gas transit dose and moisture-vapor transmission, the straight plating cigarette lining paper that the same base stock of take is done is contrast sample, and data are as following table 1:
Table 1
As shown in Table 1: embodiment 1,2,3 composition barriers are significantly better than contrast sample, wherein obvious with embodiment 2; And comparative example 1,2 barriers are without improvement, variation even.It is mainly based on following mechanism that said composition has excellent barrier: the self-crosslinking acrylic in composition is under >=100 ℃ of conditions, can there is cross-linking reaction in the functional group between different molecular, a stable three-dimensional net structure of final formation, in barrier layer, play the effect of skeleton, and this structure can keep the stable of structure in high humidity, relatively high temperature.In film forming procedure, because of its molecular weight, can be filled in the middle of self-crosslinking acrylic three-dimensional net structure; The soft section of regular easy forming section crystallization of part-structure, causes in institute's film forming free volume to reduce, and free volume be steam, gas molecule by the main thoroughfare of coating, so minimizing of free volume, can improve the barrier of coating; In addition between polyurethane molecular, can form the active force between hydrogen bond, static, Van der Waals force power equimolecular between polyurethane and self-crosslinking acrylic, this will further put forward the cohesion density of coating, and barrier is further enhanced.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned particular implementation, and those skilled in the art can make various distortion or modification within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (8)
1. environment-friendly type, for the high barrier coating composition without aluminum casting paper, is characterized in that, comprises each component of following weight portion:
2. environment-friendly type as claimed in claim 1 is for the high barrier coating composition without aluminum casting paper, it is characterized in that, the weight average molecular weight of described self-crosslinking acrylic emulsion is 100,000～200,000, glass transition temperature is 30 ℃～60 ℃, lower than 90 ℃, more than >=100 ℃ of heating 10s, can there is cross-linking reaction in minimum film formation temperature.
3. environment-friendly type as claimed in claim 1, for the high barrier coating composition without aluminum casting paper, is characterized in that, the weight average molecular weight of described aqueous polyurethane is 10,000～30,000, and soft section of part of strand is ordered structure.
4. environment-friendly type as claimed in claim 1, for the high barrier coating composition without aluminum casting paper, is characterized in that, described cosolvent is one or more in ethanol, isopropyl alcohol, propylene glycol ethers.
5. environment-friendly type as claimed in claim 1, for the high barrier coating composition without aluminum casting paper, is characterized in that, described wetting agent is anionic wetting agent or non-ionic wetting agent.
6. environment-friendly type as claimed in claim 1, for the high barrier coating composition without aluminum casting paper, is characterized in that, described defoamer is one or more in modified polyorganosiloxane, non-ionic interfacial agent, modified silicone defoamer.
7. environment-friendly type as claimed in claim 1, for a preparation method for the high barrier coating composition without aluminum casting paper, is characterized in that, comprises the steps:
Steps A, according to described component and weight portion, get the raw materials ready;
Step B, described self-crosslinking acrylic emulsion, aqueous polyurethane are dropped in reactor, stirring at low speed is even;
Step C, described cosolvent and deionized water are mixed after, in the situation that stirring, join in reactor stirring at low speed 5～10min;
Step D, in reactor, add successively described wetting agent, levelling agent, middling speed stirs 10～20min;
Step e, in reactor, add described defoamer, high-speed stirred 30～40min, filters, and obtains described environment-friendly type for the high barrier Coating material composition product without aluminum casting paper.
8. environment-friendly type as claimed in claim 7, for the preparation method of the high barrier coating composition without aluminum casting paper, is characterized in that, the speed of described stirring at low speed is 300～500rpm; The speed that described middling speed stirs is 700～800rpm; The speed of described high-speed stirred is 1000～1200rpm.
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| CN201310464134.4A CN103556528B (en) | 2013-09-30 | 2013-09-30 | High-barrier-propertenvironment-friendlycoating environment-friendlycoating coating composition for non-aluminum lining paper and preparation method thereof |
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| CN201310464134.4A CN103556528B (en) | 2013-09-30 | 2013-09-30 | High-barrier-propertenvironment-friendlycoating environment-friendlycoating coating composition for non-aluminum lining paper and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105926368A (en) * | 2016-05-18 | 2016-09-07 | 常德金德镭射科技股份有限公司 | High-barrier aluminum-free coating paper |
| CN109235126A (en) * | 2018-08-24 | 2019-01-18 | 云南九九彩印有限公司 | A kind of waterproof back applies material and preparation method thereof and application method |
| CN109518524A (en) * | 2018-09-26 | 2019-03-26 | 江苏乘鹰新材料股份有限公司 | A kind of cork paper aqueous grease proofing back-coating and its use, preparation method |
| CN114350217A (en) * | 2021-12-28 | 2022-04-15 | 万华化学集团股份有限公司 | Barrier coating, preparation method thereof and recyclable paper |
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| CN101768399A (en) * | 2009-12-16 | 2010-07-07 | 上海维凯化学品有限公司 | Environment-friendly aquosity composite citicall limited aluminium paint and preparation method thereof |
| CN102363933A (en) * | 2011-06-30 | 2012-02-29 | 上海乘鹰新材料有限公司 | Environmentally-friendly aqueous matte aluminized paper undercoating paint and preparation method as well as application thereof |
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| US4108840A (en) * | 1977-04-15 | 1978-08-22 | Ppg Industries, Inc. | Urea-urethane-acrylate radiation curable coating compositions and methods of making same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105926368A (en) * | 2016-05-18 | 2016-09-07 | 常德金德镭射科技股份有限公司 | High-barrier aluminum-free coating paper |
| CN109235126A (en) * | 2018-08-24 | 2019-01-18 | 云南九九彩印有限公司 | A kind of waterproof back applies material and preparation method thereof and application method |
| CN109518524A (en) * | 2018-09-26 | 2019-03-26 | 江苏乘鹰新材料股份有限公司 | A kind of cork paper aqueous grease proofing back-coating and its use, preparation method |
| CN109518524B (en) * | 2018-09-26 | 2021-12-21 | 江苏乘鹰新材料股份有限公司 | Water-based oil-proof back coating for tipping paper and application and preparation method thereof |
| CN114350217A (en) * | 2021-12-28 | 2022-04-15 | 万华化学集团股份有限公司 | Barrier coating, preparation method thereof and recyclable paper |
| CN114350217B (en) * | 2021-12-28 | 2023-01-13 | 万华化学集团股份有限公司 | Barrier coating, preparation method thereof and recyclable paper |
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