CN1062743A - Lac composition and preparation method and its application in producing phenolaldehyde moulding compound - Google Patents
Lac composition and preparation method and its application in producing phenolaldehyde moulding compound Download PDFInfo
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- CN1062743A CN1062743A CN 90110279 CN90110279A CN1062743A CN 1062743 A CN1062743 A CN 1062743A CN 90110279 CN90110279 CN 90110279 CN 90110279 A CN90110279 A CN 90110279A CN 1062743 A CN1062743 A CN 1062743A
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- lac
- phenolaldehyde moulding
- composition
- moulding compound
- sclerolac
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Abstract
A kind of lac composition, sclerolac by 96～98% and 2～4% talcum powder mix.Its preparation method is: (one) selects materials; (2) fragmentation; (3) wash look; (4) dehydration; (5) drying; (6) batching; (7) packing.Lac composition of the present invention can be used in the production process of phenolaldehyde moulding compound, and replace 10～30% resol therein, the not only every technical indicator of the phenolaldehyde moulding compound of being produced can meet or exceed the technical requirements of GB1404-86 regulation, but also can make the production cost of phenolaldehyde moulding compound descend 10%.
Description
The present invention relates to composition and the production method and the application of said composition in the preparation plastics of polymer natural resin.
It is with a long history that sclerolac is used to produce thermosetting resin, be mainly used in the production single, India is used for having done on the plastics a large amount of work at the research sclerolac, 1962～1970 years, they utilize shellac glue (Shellqac) to produce sheet glue plastics, and modification urea-formaldehyde plastics and formaldehyde melamine plastics etc. are all quite effective.In " sclerolac product and plastics " book, reported 100 prescriptions in 1970, and contributed for opening up the purposes of lac on plastics industry, but the thermosetting resin of their development, goods fragility is big, and smooth finish is relatively poor, is difficult for the demoulding.Japan publication JP-57008253 discloses a kind of " resin combination ", and it consists of: a, lac; B, bisphenol A type epoxy resin; C, cyclic aliphatic epoxy resin; D, melamine methylol or its alcohol ester; E, boron trifluoride complex.This is a kind of constituent based on lac, mainly is used as the micabond of commutator segment.U.S. Pat-4136072 discloses a kind of " TPO film constituent ", the main points of this invention are in order to improve some character of TPO film, as glossiness, antifog property, tensile strength, tear resistance, binding property, sliding property, ventilation property etc., and add some additive, and add the lac material, so that film improves intensity, binding property, gloss and widens the heat-sealing scope at a lower temperature.In present disclosed data, do not find lac and composition thereof are used to produce the report of phenolaldehyde moulding compound as yet.
Purpose of the present invention aims to provide a kind of composition of new polymer natural resin, its production method with and application in the preparation phenolaldehyde moulding compound.
Polymer natural resin of the present invention is a sclerolac, described lac composition be natural sclerolac and talcous mixture wherein the content of sclerolac be 96～98%, talcous content is 2～4%(weight percent).
Lac preparation of compositions method of the present invention is: (one) gets Xia dynasty lac 50～70%, and the winter is for lac 30～50%(weight percent) mixing, perhaps all adopt the winter for lac or deposit Xia dynasty lac more than 1 year;
(2) fragmentation is all by 12 mesh sieve holes;
(3) wash look: wash with water to incarnadine;
(4) dehydration;
(5) drying;
(6) batching is got 96～98% parts of dry good seed lacs, is crushed to all by 40 mesh sieve holes, adds 2～4 parts of talcum powder (granularity requirements is all by 100 mesh sieve holes), mixes thoroughly.
(7) packing.
In above-mentioned preparation method, in blending process, available recovery glue (the fine powder glue that reclaims from lime-ash or settling tank) replaces 10～20 parts of seed lacs, and recovery glue also should be crushed to all by 40 mesh sieve holes.Packing bag can be adopted the woven bag of inner lining plastic bag.
Lac composition of the present invention can be applicable in the production of phenolaldehyde moulding compound, in this production process, sclerolac and resol generation polycondensation generate the crosslinked polymer that connects skill or block, make the phenolaldehyde moulding compound performance of being produced be better than not adding the product of lac composition.
Lac composition of the present invention is a kind of novel composition, owing to added talcum powder, the water-absorbent of sclerolac is improved in this kind composition, makes it as a kind of product, is storing and the transportation prevented from caking.And this lac composition can adopt the winter for long Xia dynasty glue of glue and staging life, these glue are because color is dark, of poor quality, generally all must demote, make a price reduction, but prepared in the present invention lac composition is a purpose to produce phenolaldehyde moulding compound, just in time with above-mentioned glue kind for well, because glue heat embrittlement time Xia dynasty of weak point staging life is longer, the winter is then shorter than long Xia dynasty glue for glue or staging life, and these characteristics help preparing phenolaldehyde moulding compound.In this preparation method's step (three), only need wash with water, and that general lac converted products all requires to be washed till is colourless, and need adds 0.3～0.6% yellow soda ash etc. when washing and make washing assistant to incarnadine, can improve yield 3～4% with present method, wash the look time decreased about 2 hours.Said composition can be applicable in the production of phenolaldehyde moulding compound, substitute 10～30% resol therein, it is crisp that the phenolaldehyde moulding compound of producing with said composition has overcome the property of phenolaldehyde moulding compound in the past, easily produce thermal distortion, arc resistance is poor, the weakness that dielectric strength changes with the variation of frequency, not only every technical indicator can meet or exceed the technical requirements of GB1404-86 regulation, and can make heat-drawn wire improve 27～30 ℃, dielectric strength improves 1.6～2.1MV/m, and other is as insulation resistance, shock strength (breach), water-absorbents etc. also improve a lot.The phenolaldehyde moulding compound of producing with said composition also can make cost decreases 10%, and economic benefit is very remarkable.
Be embodiments of the invention below:
Get lac 60kg winter Xia dynasty for lac 40kg, mixing, fragmentation, by 12 mesh sieve holes, washing is 8 hours under the room temperature, centrifuge dehydration, under 70 ℃, carry out drying with drying machine, broken for the second time, by 60 mesh sieve holes, add 100 order talcum powder 2kg, packing promptly obtains the lac composition, and its quality index is: granularity is all by 60 orders; Moisture content≤2.5%, heat embrittlement time 3～5min, softening temperature 〉=75 ℃; Cold ethanol solvend 〉=85%.
Manufacture phenolaldehyde moulding compound with above-mentioned lac composition.Fill a prescription following (by weight):
72 parts of lac compositions
168 parts in resol
263 parts of wood powders
6 parts of dyestuffs
31 parts of chlorine methyne tetramines
7 parts in magnesium oxide
7 parts of Zinic stearass
32 parts in lime carbonate
2 parts of talcum powder
2 parts of lubricating oil
43 parts in water
Manufacture by the phenolic molding compound material manufacturing technique, prepared phenolaldehyde moulding compound quality index is as follows:
Index name GB1404-86 prepares modification with the lac composition
PF
2A
2-141 index PF
2A
2-141 indexs
Volume coefficient 3.0 2.3
Flexural strength MPa 〉=70 72
Shock strength KJ/m
2〉=1.5 1.9
Heat-drawn wire ℃ 〉=140 167
Insulation resistance Ω 〉=10
81.5 * 10
10Dielectric strength (90 ℃) MV/m 〉=3.5 5.6
Medium consumption factor (tand) (1MHZ)≤0.1 3.6 * 10
-2
Water-absorbent mg 〉=50 29
This composition also can produced PF
2A
1-131, PF
2A
2Substitute the resol of 10-30% in-131 phenolaldehyde moulding compounds.
Claims (6)
1, a kind of lac composition is characterized in that containing 96～98% sclerolac and the talcum powder (weight percent) of 2-4%.
2, a kind of lac preparation of compositions method, comprise selection raw material, fragmentation, wash look, dehydration, drying process, it is characterized in that raw material be 50-70% Xia dynasty lac and winter of 30～50% for lac, perhaps all adopt the winter for lac or deposit Xia dynasty lac more than 1 year, wash with water after the fragmentation to incarnadine, dehydrate the back and prepare burden, packing by prescription.
3, in accordance with the method for claim 2, it is characterized in that requiring in the blending process sclerolac all by 40 mesh sieve holes, talcum powder is all by 100 mesh sieve holes.
4, in accordance with the method for claim 3, it is characterized in that having in the sclerolac 10～20 parts to reclaim glue.
5, a kind of application method of lac composition is characterized in that substituting 10～30% resol in the process of producing phenolaldehyde moulding compound.
6,, it is characterized in that producing PF according to the described application method of claim 5
2A
1-131, PF
2A
2-131, PF
2A
2Substitute 10～30% resol in-141 phenolaldehyde moulding compounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90110279 CN1022571C (en) | 1990-12-26 | 1990-12-26 | Lac composition and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90110279 CN1022571C (en) | 1990-12-26 | 1990-12-26 | Lac composition and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1062743A true CN1062743A (en) | 1992-07-15 |
| CN1022571C CN1022571C (en) | 1993-10-27 |
Family
ID=4881837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90110279 Expired - Fee Related CN1022571C (en) | 1990-12-26 | 1990-12-26 | Lac composition and its preparing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022571C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107093C (en) * | 1997-08-01 | 2003-04-30 | 朗开斯特集团有限公司 | Aqueous shellac solution or dispersion |
| CN1900166B (en) * | 2005-07-22 | 2010-07-28 | 株式会社电装 | Fusible/concretionary fixative for mechanical machining and mechanical machining method |
| CN108587058A (en) * | 2017-12-12 | 2018-09-28 | 昆明理工大学 | A kind of lac discards the preparation method for the urea-formaldehyde foam material that refuse lac is modified |
-
1990
- 1990-12-26 CN CN 90110279 patent/CN1022571C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107093C (en) * | 1997-08-01 | 2003-04-30 | 朗开斯特集团有限公司 | Aqueous shellac solution or dispersion |
| CN1900166B (en) * | 2005-07-22 | 2010-07-28 | 株式会社电装 | Fusible/concretionary fixative for mechanical machining and mechanical machining method |
| CN108587058A (en) * | 2017-12-12 | 2018-09-28 | 昆明理工大学 | A kind of lac discards the preparation method for the urea-formaldehyde foam material that refuse lac is modified |
| CN108587058B (en) * | 2017-12-12 | 2021-01-05 | 昆明理工大学 | Preparation method of lac waste slag glue modified urea formaldehyde foam material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1022571C (en) | 1993-10-27 |
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