JP2935857B2 - Coated ammonium polyphosphate - Google Patents
Coated ammonium polyphosphateInfo
- Publication number
- JP2935857B2 JP2935857B2 JP26698789A JP26698789A JP2935857B2 JP 2935857 B2 JP2935857 B2 JP 2935857B2 JP 26698789 A JP26698789 A JP 26698789A JP 26698789 A JP26698789 A JP 26698789A JP 2935857 B2 JP2935857 B2 JP 2935857B2
- Authority
- JP
- Japan
- Prior art keywords
- ammonium polyphosphate
- reaction
- silicone resin
- water
- coated
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、コーティングポリ燐酸アンモニウムおよび
その製造方法に関する。さらに詳しくは水溶性の小さ
い、集塊のないコーティングポリ燐酸アンモニウムおよ
びその製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a coated ammonium polyphosphate and a method for producing the same. More particularly, the present invention relates to a low water-soluble, non-agglomerated coated ammonium polyphosphate and a method for producing the same.
［従来の技術］ ポリ燐酸アンモニウムは水溶性、吸湿性であるため、
これを難燃剤として樹脂に練り込むと、加工時に発泡す
る。また樹脂に練り込まれた成形品は、高湿環境で析出
し、水中使用で溶出するなど問題がある。同様にポリ燐
酸アンモニウムを含んで製紙とすると、そのポリ燐酸ア
ンモニウムが水溶性であっては効率よく製紙できないば
かりでなく、溶出液の処理も問題である。このためポリ
燐酸アンモニウムの水溶液を低くするため、表面をメラ
ミン／ホルムアルデヒド樹脂でコーティングする方法が
ある。（特開昭61−103962号公報） ［発明が解決しようとする問題点］ しかしこの方法は、ポリ燐酸アンモニウムの集塊化が
起こり、製造を困難にするばかりでなく若干の粉砕を要
する。またこのポリ燐酸アンモニウムは、水溶性、集塊
性を充分に改良されたものではない。[Prior art] Since ammonium polyphosphate is water-soluble and hygroscopic,
When this is kneaded into a resin as a flame retardant, it foams during processing. Molded products kneaded in resin also have problems such as precipitation in a high humidity environment and elution in use in water. Similarly, if a paper is made containing ammonium polyphosphate, if the ammonium polyphosphate is water-soluble, not only cannot paper be made efficiently, but also the treatment of the eluate is problematic. Therefore, there is a method of coating the surface with a melamine / formaldehyde resin in order to reduce the aqueous solution of ammonium polyphosphate. (Problems to be Solved by the Invention) However, this method causes agglomeration of ammonium polyphosphate, which not only makes production difficult, but also requires some grinding. Further, this ammonium polyphosphate does not sufficiently improve water solubility and agglomeration.
本発明は、これらの不利益のない、つまり水溶性が小
さく、集塊が無く、有害な未反応モノマー等の残留しな
いポリ燐酸アンモニウムおよびその製造方法を目的とす
る。An object of the present invention is to provide an ammonium polyphosphate which does not have these disadvantages, that is, has low water solubility, has no agglomeration, and does not contain harmful unreacted monomers and the like, and a method for producing the same.
［問題点を解決する手段］ 本発明で使用する原料としてのポリ燐酸アンモニウム
は、粉末のもので、一般式 （NH4）n+2PnO3n+1 で表すことができる。式中ｎは、20から800で表され、
好ましくは100から800であり、粉末状で平均粒度0.001
〜0.05mmであることが好ましい。このポリ燐酸アンモニ
ウムの溶出率は、40重量％以下であることが好ましく、
さらに好ましくは25重量％以下である。この懸濁液のPH
は、４から10であることが好ましく、懸濁液のPHが４未
満であると得られたコーティングポリ燐酸アンモニウム
の水溶性を高くする傾向にある。原料としてのポリ燐酸
アンモニウムの平均粒度が0.001mm未満ではコーティン
グ剤の使用量を多くし、平均粒度0.05mmを越えると難燃
効果を弱くする。[Means for Solving the Problems] Ammonium polyphosphate as a raw material used in the present invention is a powdery material, and can be represented by the general formula (NH 4 ) n + 2 P n O 3n + 1 . Where n is represented by 20 to 800,
It is preferably from 100 to 800, in powder form and having an average particle size of 0.001.
It is preferably about 0.05 mm. The dissolution rate of this ammonium polyphosphate is preferably 40% by weight or less,
More preferably, it is at most 25% by weight. PH of this suspension
Is preferably from 4 to 10, and when the PH of the suspension is less than 4, the resulting coated ammonium polyphosphate tends to have high water solubility. When the average particle size of ammonium polyphosphate as a raw material is less than 0.001 mm, the amount of the coating agent used is increased, and when the average particle size exceeds 0.05 mm, the flame retardant effect is weakened.
本発明に使用するシリコン樹脂は、ポリ燐酸アンモニ
ウムをコーティング処理する硬化性シリコン樹脂であ
り、Si−Ｏ−Siのシロキサン結合を骨格に持ちSi−Ｈ結
合をポリシロキサンチエンの末端または内部に持った硬
化性シリコン樹脂である。この硬化性シリコン樹脂の一
般式を例示する。The silicone resin used in the present invention is a curable silicone resin coated with ammonium polyphosphate, and has a siloxane bond of Si-O-Si as a skeleton and a Si-H bond at the terminal or inside of the polysiloxane chain. It is a curable silicone resin. The general formula of the curable silicone resin will be exemplified.
［式中ＲはC1〜C4のアルキル基、Ｒ′はC1〜C8のアルキ
ル基またはフェニル基、これらの基の組合せであり、ｎ
は１以上の整数、ｍは０又は１以上の整数］があり、さ
らに具体的には、ポリメチルハイドロシロキサン，ポリ
メチルハイドロ−ジメチルシロキサンコポリマー，ポリ
メチルハイドロ−メチルオクチルシロキサンコポリマ
ー，ポリエチルハイドロシロキサン，ポリメチルハイド
ロキソキサン−ジフェニルシロキサン−ジメチルシロキ
サンターポリマーなどがある。この使用量は、ポリ燐酸
アンモニウム100重量部に対して１〜30重量部が適量で
あるがこれに限定されるものではない。 Wherein R is a C 1 -C 4 alkyl group, R ′ is a C 1 -C 8 alkyl group or a phenyl group, a combination of these groups, and n
Is an integer of 1 or more, m is an integer of 0 or 1 or more], and more specifically, polymethylhydrosiloxane, polymethylhydro-dimethylsiloxane copolymer, polymethylhydro-methyloctylsiloxane copolymer, polyethylhydrosiloxane And polymethylhydroxoxane-diphenylsiloxane-dimethylsiloxane terpolymer. The use amount is 1 to 30 parts by weight based on 100 parts by weight of ammonium polyphosphate, but is not limited thereto.
本発明のコーティング方法で使用する硬化促進剤は、
ポリ燐酸アンモニウムを硬化性シリコン樹脂で三次元網
目構造にコーティング処理するためのものである。この
硬化促進剤として、アルコキシアミノシランの一般式を
例示する。Curing accelerator used in the coating method of the present invention,
This is for coating ammonium polyphosphate with a curable silicone resin into a three-dimensional network structure. As the curing accelerator, a general formula of an alkoxyaminosilane is exemplified.
NH2−Ｒ−Si（OR″）３ ［式中ＲはC1〜C4のアルキル基又は、フェニル基を含む
基で、Ｒ″は、C1〜C4のアルキル基である］。さらに具
体的に４−アミノブチルメチルメトキシシラン,4−アミ
ノブチルトリエトキシシラン，（アミノエチル，アミノ
メチル）フェネチルトリメトキシシラン,N−（２−アミ
ノエチル）３−アミノプロピルメチルジメトキシシラ
ン,N−（２アミノエチル）３−アミノプロピルトリエト
キシシラン,p−アミノフェニルトリエトキシシラン,3−
アミノプロピルジメチルエトキシシラン,3−アミノプロ
ピルメチルジエトキシシラン,3−アミノプロピルトリエ
トキシシランなどのアルコキシアミノシランを例示でき
る。使用量は、使用するシリコン樹脂100重量部に対し
て、２〜30重量部が好ましく、より好ましくは10重量部
程度である。硬化促進剤の添加方法としては、シリコン
樹脂と同時に添加する、またはシリコン樹脂混合後、反
応途中から、水と同時に添加する方法などいずれの方法
であってもよい。NH 2 —R—Si (OR ″) 3 wherein R is a C 1 -C 4 alkyl group or a group containing a phenyl group, and R ″ is a C 1 -C 4 alkyl group. More specifically, 4-aminobutylmethylmethoxysilane, 4-aminobutyltriethoxysilane, (aminoethyl, aminomethyl) phenethyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane, N- (2 aminoethyl) 3-aminopropyltriethoxysilane, p-aminophenyltriethoxysilane, 3-
Examples thereof include alkoxyaminosilanes such as aminopropyldimethylethoxysilane, 3-aminopropylmethyldiethoxysilane, and 3-aminopropyltriethoxysilane. The amount used is preferably from 2 to 30 parts by weight, more preferably about 10 parts by weight, based on 100 parts by weight of the silicone resin used. As a method of adding the curing accelerator, any method may be used, such as a method of adding the same at the same time as the silicone resin, or a method of adding the same simultaneously with the water during the reaction after mixing the silicone resin.
本発明のコーティング方法で使用する有機溶剤は、沸
点200℃以下ものを使用できる。具体的にはメタノー
ル，エタノール等のアルコール類、アセトン，メチルエ
チルケトン等のケトン類、キシレン，トルエン等の芳香
族類などの溶剤を使用することができる。使用量は、ポ
リ燐酸アンモニウムと同量か、数倍が好ましく、反応系
の粘度、撹拌能力、効率により決められる。As the organic solvent used in the coating method of the present invention, those having a boiling point of 200 ° C. or lower can be used. Specifically, solvents such as alcohols such as methanol and ethanol, ketones such as acetone and methyl ethyl ketone, and aromatics such as xylene and toluene can be used. The amount used is preferably the same as or several times the amount of ammonium polyphosphate, and is determined by the viscosity of the reaction system, the stirring capacity, and the efficiency.
本発明のコーティング方法で使用する水は、硬化反応
を促進するためのものである。水の添加量は、使用する
シリコン樹脂と同量から20倍程度とし、好ましくは1.2
〜４倍量程度である。添加時期としては反応開始から開
始２時間程度がよく、反応途中数回に分割添加してもよ
い。The water used in the coating method of the present invention is for accelerating the curing reaction. The amount of water to be added should be about the same amount as the silicone resin to be used and about 20 times, preferably 1.2 times.
It is about 4 times the amount. The addition time is preferably about 2 hours from the start of the reaction, and may be added several times during the reaction.
本発明のコーティング処理反応温度は、60℃〜200℃
の有機溶剤の還流温度で反応時間は30分から４時間であ
ると効率がよいがこれに限定するものではない。The coating reaction temperature of the present invention is 60 ° C to 200 ° C.
If the reaction time is 30 minutes to 4 hours at the reflux temperature of the organic solvent, the efficiency is high, but the present invention is not limited to this.
［発明の効果］ 本発明のコーティングポリ燐酸アンモニウムは、シリ
コン樹脂でコーティング処理してあるので、水溶性が小
さく、集塊がない。このため取扱が容易であるばかりで
なく、コーティングポリ燐酸アンモニウムの使用加工時
に発泡しない。また練り込まれたまたは含有された製品
は、高湿環境で析出しにくく、水中使用で溶出しにく
い。[Effect of the Invention] Since the coated ammonium polyphosphate of the present invention is coated with a silicone resin, it has low water solubility and does not have agglomeration. For this reason, not only is it easy to handle, but also it does not foam when the coated ammonium polyphosphate is used and processed. Also, the kneaded or contained product is less likely to precipitate in a high-humidity environment and is less likely to elute when used in water.
また本発明のコーティング方法は、乾燥、粉砕がが容
易ある。The coating method of the present invention is easy to dry and pulverize.
このように紙、塗料またはプラスチックなどの難燃剤
として好適に使用できる。As described above, it can be suitably used as a flame retardant such as paper, paint or plastic.
［実施例］ （水溶性の評価方法） 得られたコーティングポリ燐酸アンモニウム粉末10g
を水90gを懸濁し、これを室温にて60分撹はんした。次
にこの懸濁液を、遠心分離機にかけ粉末を沈降させ、そ
の上澄液の一部を取り出し、精秤、乾燥して溶出量を測
定した。[Example] (Method of evaluating water solubility) 10 g of the obtained coated ammonium polyphosphate powder
Was suspended in water and stirred at room temperature for 60 minutes. Next, the suspension was centrifuged to settle the powder, a part of the supernatant was taken out, precisely weighed and dried to measure the elution amount.
（集塊性の評価） 乾燥して得られたコーティングポリ燐酸アンモニウム
が粉末状のものを○、凝集し少し力を加えないと粉末状
にならないものを×とした。(Evaluation of agglomeration property) A powdery coating ammonium polyphosphate obtained by drying was rated as 、, and a powder that aggregated and did not turn into a powdery form without applying a little force was rated as ×.
（ポリ燐酸アンモニウムの製造法） 下記方法にて製造した。(Production method of ammonium polyphosphate) It was produced by the following method.
燐酸１アンモニウム（MAP） １モル 尿素 1.3モル 反応温度（外温） 200℃〜220℃ 反応機；ニーダー使用。Ammonium phosphate (MAP) 1 mol Urea 1.3 mol Reaction temperature (outside temperature) 200 ° C to 220 ° C Reactor; use of kneader.
1.一次焼成 ニーダーが200〜220℃になったところで、MAPと使用
する尿素の1/2を投入し撹はん、反応を行なう。30分
後、残りの尿素を４分割し15分間隔で投入する。尿素全
量投入後、アンモニアガス20〜30L/時間で吹き込む。ア
ンモニア吹込み1.5時間で固化し、撹はん羽根で粉砕さ
れ粉末状となる。1. Primary baking When the temperature of the kneader reaches 200 to 220 ° C, MAP and 1/2 of the urea to be used are charged, stirred, and reacted. After 30 minutes, the remaining urea is divided into four parts and charged at 15 minute intervals. After the total amount of urea is injected, blow in ammonia gas at 20 to 30 L / hour. Ammonia is blown for 1.5 hours, solidified, and pulverized by stirring blades to form a powder.
2.二次焼成 一次焼成品を冷却後ミキサーで粉砕する。粉砕したポ
リ燐酸アンモニウムをアンモニア吹込み管が下部に付い
た、協力撹はん機の付いた縦長反応機に取り、アンモニ
アを吹き込みながら撹はんし280〜300℃で２〜３時間焼
成を行なう。2. Secondary firing The primary fired product is cooled and pulverized with a mixer. Take the crushed ammonium polyphosphate into a vertical reactor equipped with a co-agitator with an ammonia blowing pipe at the bottom, and stir while blowing ammonia to perform calcination at 280-300 ° C for 2-3 hours. .
アンモニアガス;20〜30L/時間 上昇速度 ;8 〜10℃／分 焼成終了後、アンモニアを吹き込みながら冷却し、溶
解時のPH7前後に調整する。これを更に粉砕分別して平
均粒度20μ以下とする。このコーティングポリ燐酸アン
モニウムは、10％スラリーのPH6.8水溶解性20％であっ
た。Ammonia gas: 20 to 30 L / hour Rise rate: 8 to 10 ° C./minute After firing, cool while blowing ammonia to adjust to around PH7 during melting. This is further pulverized and fractionated to an average particle size of 20 μm or less. The coated ammonium polyphosphate had a pH 6.8 water solubility of 20% of a 10% slurry.
次に、本発明の実施例について説明する。 Next, examples of the present invention will be described.
実施例−１ 撹はん機，還流装置，温度計，を取り付けた加熱可能
な300mlのセバラブルフラスコに、メタノール50g及び、
ポリメチルハイドロシロキサン（東芝製TSF−484）5.0g
を取る。これを撹はん均一化し、そこにポリ燐酸アンモ
ニウム粉末50gを投入し良く撹はんして粉末を懸濁させ
る。次いでアルカリ性硬化促進剤として３−アミノプロ
ピルトリエトキシシラン（以後APS−Ｅとする）を0.5g
添加する。撹はんを続けながら昇温し、還流温度で１時
間反応させる。その後水7.5gをゆっくり滴下する。滴下
終了後に還流温度で１時間反応を行う。その後再度水7.
8gを同様に添加する。その後１時間還流温度で反応を続
けた後、室温まで温度を下げる。次にこの反応物をろ過
し、メタノールで軽く洗浄した後、100℃で乾燥する。
得られたコーティングポリ燐酸アンモニウムの粉末につ
いて水溶性、集塊性の測定を行なう。結果を第１表に示
す。Example 1 A heatable 300 ml separable flask equipped with a stirrer, a reflux device, and a thermometer was charged with 50 g of methanol and
5.0 g of polymethylhydrosiloxane (TSF-484 manufactured by Toshiba)
I take the. This is stirred and homogenized, and 50 g of ammonium polyphosphate powder is added thereto, and the mixture is stirred well to suspend the powder. Next, 0.5 g of 3-aminopropyltriethoxysilane (hereinafter referred to as APS-E) as an alkaline curing accelerator.
Added. The temperature is raised while continuing the stirring, and the reaction is carried out at the reflux temperature for 1 hour. Thereafter, 7.5 g of water is slowly added dropwise. After the completion of the dropwise addition, the reaction is carried out at a reflux temperature for 1 hour. Then again water 7.
8 g are added in the same way. Then, after continuing the reaction at the reflux temperature for 1 hour, the temperature is lowered to room temperature. The reaction is then filtered, washed lightly with methanol and dried at 100 ° C.
Water solubility and agglomeration of the obtained coated ammonium polyphosphate powder are measured. The results are shown in Table 1.
実施例−２ 硬化促進剤APS−Ｅの量を0.25gに変更した以外は、実
施例１に準じて行なう。Example 2 The same procedure as in Example 1 was carried out except that the amount of the curing accelerator APS-E was changed to 0.25 g.
実施例−３ 使用溶剤を、エタノール50gに変更した以外は、実施
例１に準じて行なう。Example 3 The same procedure as in Example 1 was carried out except that the solvent used was changed to 50 g of ethanol.
実施例−４ 使用溶剤をアセトン50gに変更した以外は実施例１に
準じて行なう。Example 4 The same procedure as in Example 1 was carried out except that the solvent used was changed to 50 g of acetone.
実施例−５ 水の使用量を１回目3.7g、２回目3.7gに変更した以外
は、実施例１に準じて行なう。Example-5 The same procedure as in Example 1 was carried out except that the amount of water used was changed to 3.7 g for the first time and 3.7 g for the second time.
実施例−６ 硬化促進剤にＮ−（２アミノエチル）３−アミノプロ
ピルトリメトキシシラン（以後AAS−Ｍとする）を0.5gz
gに変更した以外は、実施例１に準じて行なう。Example-6 0.5 gz of N- (2aminoethyl) 3-aminopropyltrimethoxysilane (hereinafter referred to as AAS-M) as a curing accelerator
The procedure is performed in the same manner as in Example 1 except that g is changed.
比較例−１ メチロールメラミンによるコーティング撹はん機，還
流装置，温度計，を取り付けた加熱可能なフラスコにメ
ラミン25gと37％ホルムアルデヒド溶液35.5gそして水6
0.5gを取る。次に撹はんしながら反応温度を70℃まで上
げメラミンが完全に溶解し透明な溶液になるまで反応す
る。この反応物メティロールメラミンの溶液は、次の反
応に全量使用される。Comparative Example-1 Coating with Methylol Melamine In a heatable flask equipped with a stirrer, reflux device and thermometer, 25 g of melamine, 35.5 g of 37% formaldehyde solution and 6
Take 0.5g. Next, the reaction temperature is raised to 70 ° C. with stirring, and the reaction is continued until the melamine is completely dissolved to form a transparent solution. This solution of the reactant methylolmelamine is used in its entirety in the next reaction.
撹はん機，還流装置，温度計，付反応フラスコにポリ
燐酸アンモニウム粉末250gメタノール250gを取り、良く
撹はんしながら、前記のメティロールメラミンを添加す
る。30分撹はん後、撹はんしながら、50％希硫酸を滴下
し、PHを３〜４に調整する。次に反応温度を70℃にし、
２時間反応を行なう。反応後冷却しろ別する。粉末を良
く洗浄アンモニア水で中和処理した後100℃で乾燥を行
なう。この後は実施例１に準じて行なう。Take 250 g of ammonium polyphosphate powder and 250 g of methanol into a reaction flask equipped with a stirrer, a reflux device, a thermometer, and add the above-mentioned methylol melamine while stirring well. After stirring for 30 minutes, while stirring, 50% diluted sulfuric acid is added dropwise to adjust the pH to 3-4. Next, raise the reaction temperature to 70 ° C,
The reaction is performed for 2 hours. After the reaction, cool and separate. The powder is thoroughly washed, neutralized with aqueous ammonia, and dried at 100 ° C. Thereafter, the process is performed according to the first embodiment.
Claims (2)
いて硬化性シリコン樹脂でコーティング処理したコーテ
ィングポリ燐酸アンモニウム。1. A coated ammonium polyphosphate obtained by coating ammonium polyphosphate with a curable silicone resin using a curing accelerator.
させ、硬化性シリコン樹脂、硬化促進剤と水を加え撹拌
下に硬化反応でコーティング処理するコーティングポリ
燐酸アンモニウムの製造方法。2. A method for producing a coated ammonium polyphosphate in which ammonium polyphosphate is suspended in an organic solvent, a curable silicone resin, a curing accelerator and water are added, and a coating treatment is carried out by a curing reaction under stirring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26698789A JP2935857B2 (en) | 1989-10-14 | 1989-10-14 | Coated ammonium polyphosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26698789A JP2935857B2 (en) | 1989-10-14 | 1989-10-14 | Coated ammonium polyphosphate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03131508A JPH03131508A (en) | 1991-06-05 |
| JP2935857B2 true JP2935857B2 (en) | 1999-08-16 |
Family
ID=17438488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26698789A Expired - Lifetime JP2935857B2 (en) | 1989-10-14 | 1989-10-14 | Coated ammonium polyphosphate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2935857B2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100386056B1 (en) | 1997-06-26 | 2003-06-09 | 부덴하임 이베리카 에스.엘. 소시에다드 안 콤만디타 | Thermoplastic-coated ammonium polyphosphate, process for the preparation thereof and flame retardant comprising the same |
| DE19830128A1 (en) * | 1998-07-06 | 2000-02-10 | Degussa | Surface modified flame retardants, processes for their production and their use |
| JP4304510B2 (en) | 2004-02-16 | 2009-07-29 | 信越化学工業株式会社 | Flame retardant additive, emulsion type coating agent and flame retardant composition |
| KR101162260B1 (en) * | 2004-02-24 | 2012-07-04 | 가부시키가이샤 아데카 | Flame retardant composition with enhanced fluidity, flame retardant resin composition and molding thereof |
| JP4973974B2 (en) * | 2004-08-25 | 2012-07-11 | Ｔｂカワシマ株式会社 | Flame retardant resin composition |
| JP2007130632A (en) * | 2005-10-14 | 2007-05-31 | Toray Ind Inc | Filtering medium and filter |
| JP5146644B2 (en) * | 2007-06-19 | 2013-02-20 | 信越化学工業株式会社 | Method for modifying ammonium polyphosphate |
| US7851559B2 (en) | 2007-11-13 | 2010-12-14 | Teknor Apex Company | Soft zero halogen flame retardant thermoplastic elastomers |
| US8932497B2 (en) | 2008-03-13 | 2015-01-13 | Laxmi C. Gupta | Fire retardant coatings and bodies, and methods of use |
| JP2012210588A (en) * | 2011-03-31 | 2012-11-01 | Toray Ind Inc | Filter medium |
| CN103483873B (en) * | 2013-09-27 | 2015-06-17 | 清远市普塞呋磷化学有限公司 | Preparation method of low-viscosity microcapsule-wrapped APP (ammonium polyphosphate) |
| US20220064409A1 (en) | 2018-08-10 | 2022-03-03 | Adeka Corporation | Additive composition, flame-retardant synthetic resin composition containing same, and molded article thereof |
-
1989
- 1989-10-14 JP JP26698789A patent/JP2935857B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03131508A (en) | 1991-06-05 |
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