CN1408748A - Plastic foaming and and its preparing method - Google Patents
Plastic foaming and and its preparing method Download PDFInfo
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- CN1408748A CN1408748A CN 02136867 CN02136867A CN1408748A CN 1408748 A CN1408748 A CN 1408748A CN 02136867 CN02136867 CN 02136867 CN 02136867 A CN02136867 A CN 02136867A CN 1408748 A CN1408748 A CN 1408748A
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- urea
- stearic acid
- zinc oxide
- plastic foaming
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Abstract
The present invention relates to rubber and plastic processing assistant technology. The foaming agent is prepared with urea 73-85 weight portions (the same as below), stearic acid 15-20, ammonia water 5-8, zinc oxide 1.5-2.0, glycerin 0.1-1.0 and stuffing 4-8. The preparation process includes the following steps: heating to melt urea in ammonia solution, adding stearic acid and glycerin while stirring, evaporating to dewater to water content less than 0.5%, adding zinc oxide and stuffing via stirring, cooling with water, discharging and grinding to 120-mesh product. The foaming agent has high melting point, and is used to compound with H foaming agent and AC foaming agent composite to foam agent together with low decomposing temperature and great gas prdoucing amount.
Description
Technical field
The invention belongs to rubber plastic processing aid technical field, specifically a kind of urea derivative type plastic foaming and preparation method thereof.
Technical background
The effect of frothing aid is to reduce foaming agent decomposition temperature, helps whipping agent to disperse or improves gas release, reduces starting material and energy expenditure to reach, and reduces cost and alleviates environmental pollution.Industrial frothing aid commonly used is many at present, the commercially available trade mark of wherein nitrogenous type frothing aid is also more, such as: N type, A type, M type etc., these auxiliary agents are mainly used in dinitroso five methyne tetramines (H type) and Cellmic C 121 (AC) type main foaming agent occasion.
The clear 57-18739 of day disclosure special permission communique introduced urea heating melt and Zinic stearas bonded frothing aid and with the mixing effect of H type and AC type whipping agent.Chinese patent CN1073593 discloses urea and has mixed and added the frothing aid of carbonate as lubricant with stearic acid, and with H type whipping agent and the compound use of AC type whipping agent, these frothing aids are because the preparation feedback temperature generally need be more than 100 ℃, by product Biuret Content height in the reaction, reduced the effective ingredient of auxiliary agent, simultaneously because the preparation feedback temperature is too high, because of the impurity metal ion of equipment corrosion dissolves in the rate height, cause the appearance luster of frothing aid darker, thereby influence the foaming effect of main foaming agent.
In view of the deficiency that above-mentioned frothing aid exists, to be that design is a kind of can effectively suppress the biuret by product to technical assignment of the present invention, and the frothing aid preparation method that the preparation feedback temperature is lower produces a kind of quality of preparation and outward appearance modified version plastic foaming preferably.
Technical assignment of the present invention is to be achieved through the following technical solutions: a kind of plastic foaming, it is made up of urea, stearic acid, ammoniacal liquor, zinc oxide, glycerine and weighting agent, the concrete parts by weight of each component are 73～85 parts in urea, 15～20 parts of stearic acid, 5～8 parts of ammoniacal liquor, 1.5～2.0 parts in zinc oxide, 0.1～1.0 part of glycerine, 4～8 parts of weighting agents.
The preferred weight umber of described composition is 75～80 parts in a urea, 16～18 parts of stearic acid, 5～6 parts of ammoniacal liquor, 1.5～2.0 parts in zinc oxide, 0.2～0.5 part of glycerine, 4～6 parts of weighting agents.
Described weighting agent is a carbonate, as light calcium carbonate, water-ground limestone or treated carbonates;
Above-mentioned plastic foaming preparation method comprises following process steps:
(1). urea joined contain in the ammonia aqueous solution, heating dissolves into aqueous solution of urea;
(2) in aqueous solution of urea, add stearic acid and glycerine, stirring reaction successively;
(3) after reactant dewaters, add zinc oxide and weighting agent, stirring reaction under negative pressure state;
(4) above-mentioned reactant is through water cooling, discharging, grinding.
The temperature that the heating of described urea in containing ammonia aqueous solution dissolves is controlled at 95～100 ℃; Aqueous solution of urea and stearic reaction times were controlled at 20～30 minutes; 20～30 minutes complex reaction time behind adding zinc oxide and the weighting agent.
The present invention takes the heating for dissolving of urea in containing ammonia aqueous solution, divides pressure energy to suppress biuret and carboxylamine ammonia production of by-products effectively by control liquid level ammonia.The adding of glycerine can form azeotrope with the water in the urea stearic acid complex compound, under negative pressure state, evaporate moisture content then, can make dehydration temperaturre be lower than 100 ℃, reduce dewatering time, thereby make the corresponding minimizing of impurity metal ion of dissolving in auxiliary agent because of equipment corrosion in reaction and the dehydration by evaporation process, help improving the quality and the appearance luster of frothing aid.After measured, the molten point of the frothing aid of the present invention's preparation is 132～142 ℃, is higher than nearly 10 degree of molten point of common urea series frothing aid.
Another characteristics of preparation method of the present invention are that complex reaction and the dehydration of reactant negative pressure are carried out in same container, can make the device compactness like this, and the raw material consume is few, and simultaneously, energy utilization rate is also than higher.
The frothing aid of the present invention's preparation can be made into composite foamable agent alone or in combination with H type whipping agent and AC type whipping agent, and frothing aid doping level in composite foamable agent is 30%～60%.Adopt the gas forming amount of the composite foamable agent of frothing aid preparation of the present invention can reach 176ml/g after measured, 142 ℃ of decomposition temperatures, it is plastic foamed to can be used for PE, PP, PS, PVC etc.The plastic foam color and luster that makes is fair and clear, and the hole is thin and even, free from extraneous odour, and expansion ratio is than AC type whipping agent height.
Embodiment
Embodiment 1, get 75 parts in the urea of content 99%, join that to contain 5.0 parts of concentration be to heat in 20% the ammonia aqueous solution, control liquid level ammonia dividing potential drop, heating and temperature control is at 95～100 ℃.After treating the urea off-bottom, add 16 parts of stearic acid and 0.2 part of glycerine more successively, control stirring reaction 20 minutes.Reaction product is 350mmH in vacuum tightness
2Dehydration by evaporation under the O treats that water ratio reduces to 0.5% when following, adds 1.5 parts in zinc oxide and 5 parts of mixing of treated carbonates, stirring reaction 20 minutes; Reactant cools off through the water cycle chuck, discharging, and grinding to form 120 orders is finished product.
Embodiment 2, get 79 parts in urea, add to contain to heat in 5.5 parts of ammonia aqueous solutions to dissolve, and add 18 parts of stearic acid and 0.3 part of glycerine then successively, stirring reaction.Vacuum-evaporation dehydration back adds 1.8 parts and 4.5 parts light calcium carbonate hybrid reactions of zinc oxide, and reaction product goes out abrasive lapping through water cooling.Other condition is identical with embodiment 1.
Embodiment 3, get 80 parts in urea, heat to dissolve in containing 6 parts of ammonia aqueous solutions, add 20 parts of stearic acid and 0.5 part of glycerine then successively, stirring reaction 30 minutes.6 parts in vacuum-evaporation dehydration postemphasis matter lime carbonate, 1 part of mixing of zinc oxide, stirring reaction 30 minutes, reactant are through water cooling, and discharging is ground.Other condition is identical with embodiment 1.
Claims (7)
1. plastic foaming, it is characterized in that forming by urea, stearic acid, ammoniacal liquor, zinc oxide, glycerine and weighting agent, the concrete parts by weight of each component are 73～85 parts in urea, 15～20 parts of stearic acid, 5～8 parts of ammoniacal liquor, 1.5～2.0 parts in zinc oxide, 0.1～1.0 part of glycerine, 4～8 parts of weighting agents.
2. plastic foaming according to claim 1, the preferred weight umber that it is characterized in that described composition are 75～80 parts in urea, 16～18 parts of stearic acid, 5～6 parts of ammoniacal liquor, 1.5～2.0 parts in zinc oxide, 0.2～0.5 part of glycerine, 4～6 parts of weighting agents.
3. plastic foaming according to claim 1 is characterized in that described weighting agent is a carbonate.
4. plastic foaming preparation method according to claim 1 is characterized in that comprising following process steps:
(1). urea joined contain in the ammonia aqueous solution, heating dissolves into aqueous solution of urea;
(2) in aqueous solution of urea, add stearic acid and glycerine, stirring reaction successively;
(3) after reactant dewaters, add zinc oxide and weighting agent, stirring reaction under negative pressure state;
(4) reactant is through water cooling, discharging, grinding.
5. plastic foaming according to claim 4 is characterized in that the Heating temperature of urea in containing ammonia aqueous solution is 95～100 ℃.
6. plastic foaming according to claim 4 is characterized in that the hybrid reaction time 20-of urea and stearic acid, glycerine～30 minutes.
7. plastic foaming according to claim 4 is characterized in that adding 20～30 minutes complex reaction time behind zinc oxide and the weighting agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02136867 CN1408748A (en) | 2002-09-09 | 2002-09-09 | Plastic foaming and and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02136867 CN1408748A (en) | 2002-09-09 | 2002-09-09 | Plastic foaming and and its preparing method |
Publications (1)
| Publication Number | Publication Date |
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| CN1408748A true CN1408748A (en) | 2003-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 02136867 Pending CN1408748A (en) | 2002-09-09 | 2002-09-09 | Plastic foaming and and its preparing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432909A (en) * | 2011-08-21 | 2012-05-02 | 王若愚 | Activating agent of foaming agent and preparation method of activating agent |
| CN104311817A (en) * | 2014-10-13 | 2015-01-28 | 杭州海虹精细化工有限公司 | Preparation method of blowing promoter using urea as basal body |
| CN105131323A (en) * | 2015-07-09 | 2015-12-09 | 山东英科环保再生资源股份有限公司 | Composite foaming agent for low-foamed recycled polystyrene, and preparation method thereof |
| CN105885078A (en) * | 2014-03-20 | 2016-08-24 | 福建省锦浪精细化工有限公司 | Environment-friendly foaming agent with low-formaldehyde decomposition product and technology and active additive thereof |
| CN112321891A (en) * | 2020-09-28 | 2021-02-05 | 济南金彩阳新材料科技有限公司 | Master batch capable of reducing foaming temperature and application thereof |
-
2002
- 2002-09-09 CN CN 02136867 patent/CN1408748A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432909A (en) * | 2011-08-21 | 2012-05-02 | 王若愚 | Activating agent of foaming agent and preparation method of activating agent |
| CN102432909B (en) * | 2011-08-21 | 2013-07-24 | 王若愚 | Activating agent of foaming agent and preparation method of activating agent |
| CN105885078A (en) * | 2014-03-20 | 2016-08-24 | 福建省锦浪精细化工有限公司 | Environment-friendly foaming agent with low-formaldehyde decomposition product and technology and active additive thereof |
| CN105885078B (en) * | 2014-03-20 | 2018-11-09 | 福建省锦浪精细化工有限公司 | The environment-friendly foaming agent of the low formaldehyde of decomposition product and its technique, coagent |
| CN104311817A (en) * | 2014-10-13 | 2015-01-28 | 杭州海虹精细化工有限公司 | Preparation method of blowing promoter using urea as basal body |
| CN104311817B (en) * | 2014-10-13 | 2016-06-22 | 杭州海虹精细化工有限公司 | A kind of preparation method of the blowing promotor being matrix with carbamide |
| CN105131323A (en) * | 2015-07-09 | 2015-12-09 | 山东英科环保再生资源股份有限公司 | Composite foaming agent for low-foamed recycled polystyrene, and preparation method thereof |
| CN112321891A (en) * | 2020-09-28 | 2021-02-05 | 济南金彩阳新材料科技有限公司 | Master batch capable of reducing foaming temperature and application thereof |
| CN112321891B (en) * | 2020-09-28 | 2022-07-12 | 济南金彩阳新材料科技有限公司 | Master batch capable of reducing foaming temperature and application thereof |
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