CN102311603A - Calcium sulfate whisker modified polymethylmethacrylate and preparation process thereof - Google Patents
Calcium sulfate whisker modified polymethylmethacrylate and preparation process thereof Download PDFInfo
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- CN102311603A CN102311603A CN201110106726A CN201110106726A CN102311603A CN 102311603 A CN102311603 A CN 102311603A CN 201110106726 A CN201110106726 A CN 201110106726A CN 201110106726 A CN201110106726 A CN 201110106726A CN 102311603 A CN102311603 A CN 102311603A
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Abstract
The invention relates to calcium sulfate whisker modified polymethylmethacrylate and a preparation process thereof. The calcium sulfate whisker modified polymethylmethacrylate is prepared from the following raw materials in part by weight: 74 to 84 parts of polymethylmethacrylate, 15 to 25 parts of calcium sulfate whiskers with the diameter of 10 to 20mum, 0.5 to 1.5 parts of calcium stearate, 0 to 0.5 part of PE (polyurethane) wax, 0.2 to 0.6 part of pentaerythrityl tetraethylhexanoate and 0 to 0.2 part of phosphite ester. A preparation method of the calcium sulfate whisker modified polymethylmethacrylate comprises the following steps of: mixing the raw materials in percentage by weight for 8 to 12 minutes in a high speed mixer; carrying out melt extrusion and pelleting on the obtained mixture by a co-rotating parallel double-screw extruder; and carrying out injection moulding on the obtained granules in a co-rotating parallel double-screw injection molding machine to obtain the calcium sulfate whisker modified polymethylmethacrylate. The calcium sulfate whisker modified polymethylmethacrylate disclosed by the invention has good liquidity and high impact strength, is easy to process and form and is particularly suitable for manufacturing a product with high requirement on the strength.
Description
Technical field
The present invention relates to a kind of polymethylmethacrylate and preparation technology thereof, relate in particular to a kind of calcium sulfate whisker modified polymethylmethacrylate and preparation technology thereof.
Background technology
Polymethylmethacrylate (PMMA) is commonly called as synthetic glass, acrylic or acryl, and its transparency is high, and transmittance reaches more than 92%, with the dyestuff good color development effect that stained.PMMA has application more widely in industries such as aviation, automobile, electronics, medical treatment, chemical industry, building materials, bathroom and Advertisement labels.
But existing PMMA material extensibility is lower, is prone to split, frangible, has limited its further application.
Summary of the invention
The technical problem that the present invention will solve is, overcomes the deficiency of existing polymethyl methacrylate materials, and a kind of good fluidity, calcium sulfate whisker modified polymethylmethacrylate and preparation technology thereof excellent in cushion effect are provided.
The present invention solve the technical problem the technical scheme that is adopted:
The present invention's calcium sulfate whisker modified polymethylmethacrylate is processed by the raw material of following parts by weight: 74～84 parts of polymethylmethacrylates (PMMA); 15～25 parts of the calcium sulfate crystal whiskers of diameter 10～20 μ m; 0.5～1.5 part of calcium stearate; 0～0.5 part of polyethylene wax (PE wax) (preferred 0.2 part), 0.2～0.6 part of pentaerythritol tetrathioglycollate, 0～0.2 part of phosphorous acid ester (preferred 0.1 part).
Preferred weight proportion is: 79 parts of polymethylmethacrylates (PMMA), 20 parts of the calcium sulfate crystal whiskers of diameter 10～20 μ m, 0.5 part of calcium stearate, 0.2 part in PE wax, 0.2 part of pentaerythritol tetrathioglycollate, 0.1 part of phosphorous acid ester.
The preparation technology of the present invention's calcium sulfate whisker modified polymethylmethacrylate comprises the steps:
The polymethylmethacrylate that (1) will take by weighing by the predetermined weight proportioning, calcium sulfate crystal whiskers, calcium stearate, polyethylene wax, pentaerythritol tetrathioglycollate, phosphorous acid ester add and mix 8～12min (preferred 10min) in the high-speed mixer, the mixture of polymethylmethacrylate, calcium sulfate crystal whiskers, calcium stearate, polyethylene wax, pentaerythritol tetrathioglycollate and phosphorous acid ester;
(2) step (1) gained mixture is melt extruded through the cocurrent and parallel twin screw extruder, granulation, processing parameter is following: a district temperature 185-195 ℃ (preferred 190 ℃); Two district temperature 190-200 ℃ (preferred 195 ℃); Three district temperature 195-205 ℃ (preferred 200 ℃), four district temperature 200-210 ℃ (preferred 205 ℃), five district temperature 210-220 ℃ (preferred 215 ℃); Six district temperature 220-230 ℃ (preferred 225 ℃); Seven district temperature 210-220 ℃ (preferred 215 ℃), melt temperature 210-220 ℃ (preferred 215 ℃), head temperature 200-210 ℃ (preferred 205 ℃); Residence time 3-5min (preferred 4min), pressure 3-6MPa (preferred 5Mpa);
(3) with the injection moulding in cocurrent and parallel twin screw injection moulding machine of step (2) gained pellet; The Shooting Technique parameter is following: 215-225 ℃ of nozzle temperature (preferred 220 ℃); One section temperature 220-230 ℃ (preferred 225 ℃); Two sections temperature 210-220 ℃ (preferred 215 ℃), injection pressure 90-110Mpa (preferred 100Mpa).
Calcium sulfate crystal whiskers is claimed crystal whisker of gypsum again, is a kind of fibrous single crystal of calcium sulfate.Research shows that the wastewaters with modified calcium sulfate whiskers length-to-diameter ratio of the present invention's use is 100, and diameter is 10～20 μ m, and it has uniform cross-sectional area, and complete internal structure, this characteristic are given its intensity near valence link between crystal theoretical value-atom.Because it has high intensity, trickle size is prone to and the PMMA interfacial adhesion; Improve consistency and interface cohesive force with matrix; When receiving the foreign compulsion orientation, the unrelieved stress among the PMMA can pass to calcium sulfate crystal whiskers well, thereby improves the intensity of matrix material; Because calcium sulfate crystal whiskers is an inorganics, in PMMA matrix, be uniformly dispersed, be difficult for reuniting, make composite property stable.
The present invention's calcium sulfate whisker modified polymethylmethacrylate, good fluidity, excellent in cushion effect is easy to machine-shaping, is particularly suitable for making the product high to requirement of strength.
Embodiment
Below in conjunction with embodiment the present invention is done further explain.
The raw material weight proportioning of the calcium sulfate whisker modified polymethylmethacrylate of embodiment 1-3 is seen table 1.
The preparation method of the calcium sulfate whisker modified polymethylmethacrylate of each embodiment:
The polymethylmethacrylate that (1) will take by weighing by the predetermined weight proportioning, calcium sulfate crystal whiskers, calcium stearate, PE wax, pentaerythritol tetrathioglycollate, phosphorous acid ester add in the high-speed mixer and mix 10min;
(2) each raw mix of step (1) gained is put into the loading hopper of cocurrent and parallel twin screw extruder, melt extruded, granulation, processing parameter is following: 190 ℃ of district's temperature, 195 ℃ of two district's temperature; 200 ℃ of three district's temperature, 205 ℃ of four district's temperature, 215 ℃ of five district's temperature; 225 ℃ of six district's temperature, 215 ℃ of seven district's temperature, 215 ℃ of melt temperatures; 205 ℃ of head temperatures, residence time 4min, pressure 5Mpa;
(3) with the injection moulding in cocurrent and parallel twin screw injection moulding machine of step (2) gained pellet, the Shooting Technique parameter is following: 220 ℃ of nozzle temperature, 225 ℃ of one section temperature, 215 ℃ of two sections temperature, injection pressure 100Mpa.
The product of embodiment 1-3 preparation is detected its performance according to ASTM examination criteria prescriptive procedure, and the result lists in table 2.
Claims (6)
1. calcium sulfate whisker modified polymethylmethacrylate; It is characterized in that, process: 74～84 parts of polymethylmethacrylates, 15～25 parts of the calcium sulfate crystal whiskers of diameter 10～20 μ m by the raw material of following parts by weight; 0.5～1.5 part of calcium stearate; 0～0.5 part of polyethylene wax, 0.2～0.6 part of pentaerythritol tetrathioglycollate, 0～0.2 part of phosphorous acid ester.
2. calcium sulfate whisker modified polymethylmethacrylate according to claim 1 is characterized in that, said PE wax parts by weight are 0.2 part.
3. calcium sulfate whisker modified polymethylmethacrylate according to claim 1 is characterized in that, said phosphorous acid ester parts by weight are 0.1 part.
4. calcium sulfate whisker modified polymethylmethacrylate according to claim 1; It is characterized in that, process: 79 parts of polymethylmethacrylates, 20 parts of the calcium sulfate crystal whiskers of diameter 10～20 μ m by the raw material of following parts by weight; 0.5 part of calcium stearate; 0.2 part in PE wax, 0.2 part of pentaerythritol tetrathioglycollate, 0.1 part of phosphorous acid ester.
5. the preparation technology like the described calcium sulfate whisker modified polymethylmethacrylate of one of claim 1～4 is characterized in that, may further comprise the steps:
The polymethylmethacrylate that (1) will take by weighing by the predetermined weight proportioning, calcium sulfate crystal whiskers, calcium stearate, polyethylene wax, pentaerythritol tetrathioglycollate, phosphorous acid ester add in the high-speed mixer and mix 8～12min, the mixture of polymethylmethacrylate, calcium sulfate crystal whiskers, calcium stearate, polyethylene wax, pentaerythritol tetrathioglycollate and phosphorous acid ester;
(2) step (1) gained mixture is melt extruded through the cocurrent and parallel twin screw extruder, granulation, processing parameter is following: a district temperature 185-195 ℃, two district temperature 190-200 ℃; Three district temperature 195-205 ℃, four district temperature 200-210 ℃, five district temperature 210-220 ℃; Six district temperature 220-230 ℃, seven district temperature 210-220 ℃, melt temperature 210-220 ℃; Head temperature 200-210 ℃, residence time 3-5min, pressure 3-6MPa;
(3) with the injection moulding in cocurrent and parallel twin screw injection moulding machine of step (2) gained pellet, the Shooting Technique parameter is following: 215-225 ℃ of nozzle temperature, one section temperature 220-230 ℃, two sections temperature 210-220 ℃, injection pressure 90-110Mpa.
6. the preparation technology of a calcium sulfate whisker modified polymethylmethacrylate as claimed in claim 5 is characterized in that, may further comprise the steps:
Said step (1) will add in the high-speed mixer by polymethylmethacrylate, calcium sulfate crystal whiskers, calcium stearate, polyethylene wax, pentaerythritol tetrathioglycollate, the phosphorous acid ester that the predetermined weight proportioning takes by weighing and mix 10min;
Said step (2), it is following to melt extrude processing parameter: 190 ℃ of district's temperature, 195 ℃ of two district's temperature; 200 ℃ of three district's temperature, 205 ℃ of four district's temperature, 215 ℃ of five district's temperature; 225 ℃ of six district's temperature, 215 ℃ of seven district's temperature, 215 ℃ of melt temperatures; 205 ℃ of head temperatures, residence time 4min, pressure 5MPa;
Said step (3), the Shooting Technique parameter is following: 220 ℃ of nozzle temperature, 225 ℃ of one section temperature, 215 ℃ of two sections temperature, injection pressure 100MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110106726XA CN102311603B (en) | 2011-04-27 | 2011-04-27 | Calcium sulfate whisker modified polymethylmethacrylate and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110106726XA CN102311603B (en) | 2011-04-27 | 2011-04-27 | Calcium sulfate whisker modified polymethylmethacrylate and preparation process thereof |
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| CN102311603A true CN102311603A (en) | 2012-01-11 |
| CN102311603B CN102311603B (en) | 2013-05-29 |
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| CN201110106726XA Active CN102311603B (en) | 2011-04-27 | 2011-04-27 | Calcium sulfate whisker modified polymethylmethacrylate and preparation process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105980329A (en) * | 2013-12-06 | 2016-09-28 | 佐治亚-太平洋石膏有限责任公司 | Gypsum composite modifiers |
| CN109320771A (en) * | 2018-09-28 | 2019-02-12 | 武汉工程大学 | A kind of method that calcium sulfate crystal whiskers surface is modified |
| US10280288B2 (en) | 2013-12-06 | 2019-05-07 | Georgia-Pacific Gypsum Llc | Calcium sulfate crystals and methods for making the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05331343A (en) * | 1992-05-29 | 1993-12-14 | Mitsui Sekika Sanshi Kk | Composite material |
| CN1330104A (en) * | 2001-06-06 | 2002-01-09 | 东华大学 | Electrolyte film of modified polymer gel and its preparing process and application |
-
2011
- 2011-04-27 CN CN201110106726XA patent/CN102311603B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05331343A (en) * | 1992-05-29 | 1993-12-14 | Mitsui Sekika Sanshi Kk | Composite material |
| CN1330104A (en) * | 2001-06-06 | 2002-01-09 | 东华大学 | Electrolyte film of modified polymer gel and its preparing process and application |
Non-Patent Citations (1)
| Title |
|---|
| 陈立新等: "晶须改性聚合物的研究概况", 《中国塑料》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105980329A (en) * | 2013-12-06 | 2016-09-28 | 佐治亚-太平洋石膏有限责任公司 | Gypsum composite modifiers |
| CN105980329B (en) * | 2013-12-06 | 2018-03-30 | 佐治亚-太平洋石膏有限责任公司 | Composite gypsum material modifying agent |
| US10280288B2 (en) | 2013-12-06 | 2019-05-07 | Georgia-Pacific Gypsum Llc | Calcium sulfate crystals and methods for making the same |
| CN109320771A (en) * | 2018-09-28 | 2019-02-12 | 武汉工程大学 | A kind of method that calcium sulfate crystal whiskers surface is modified |
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| CN102311603B (en) | 2013-05-29 |
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Effective date of registration: 20160816 Address after: An Industrial Park Economic Development Zone, Changde City, Hunan province Linli County 415200 Patentee after: Hunan Fu Xiang new type building material Co., Ltd. Address before: 410005, 12 floor, Haidong mansion, Furong Road, Changsha, Hunan Patentee before: Liu Liwen |