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JPH01139641A - Unsaturated polyester resin composition - Google Patents

Unsaturated polyester resin composition

Info

Publication number
JPH01139641A
JPH01139641AJP29817987AJP29817987AJPH01139641AJP H01139641 AJPH01139641 AJP H01139641AJP 29817987 AJP29817987 AJP 29817987AJP 29817987 AJP29817987 AJP 29817987AJP H01139641 AJPH01139641 AJP H01139641A
Authority
JP
Japan
Prior art keywords
unsaturated polyester
crosslinking agent
resin composition
polyester resin
acid value
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.)
Pending
Application number
JP29817987A
Other languages
Japanese (ja)
Inventor
Yoshio Kotani
粉谷 佳男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works LtdfiledCriticalMatsushita Electric Works Ltd
Priority to JP29817987ApriorityCriticalpatent/JPH01139641A/en
Publication of JPH01139641ApublicationCriticalpatent/JPH01139641A/en
Pendinglegal-statusCriticalCurrent

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Abstract

PURPOSE:To obtain the title composition improved in the releasability and hot-rigidity of the molded products therefrom, also in stability, by incorporating an unsaturated polyester of low acid value with a crosslinking agent having polymerizable double bond and melamine resin. CONSTITUTION:The objective composition can be obtained by incorporating (A) a unsaturated polyester of low acid value with said value of pref. <=20 (esp. 15 to 20) with (B) pref. an excess amount, based on the component A, of a crosslinking agent having polymerizable double bond (e.g., diallyl phthalate, styrene), and (C) such an amount of melamine resin as to account for pref. 40-70wt.% of the total amount of the components A, B and C and the curing agent, and furthermore, depending on applications, (D) such ingredient(s) as base material(s) desired (e.g., glass fiber, calcium carbonate), curing agent (e.g., dicumyl peroxide), releasant (e.g., zinc stearate) or pigment (e.g., titanium dioxide).

Description

Translated fromJapanese

【発明の詳細な説明】〔技術分野〕この発明は、成形材料などに用いられる不飽和ポリエス
テル樹脂組成物に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an unsaturated polyester resin composition used as a molding material or the like.

〔背景技術〕[Background technology]

不飽和ポリエステル樹脂組成物は、たとえば、不飽和ポ
リエステル、スチレン等の架橋剤、および、メラミン樹
脂を含むものがあり、用途等に応じて、所望の基材、硬
化剤、離型剤、顔料等が配合されている。ところが、こ
の不飽和ポリエステル樹脂組成物は、混練時にメラミン
樹脂の反応が進んでしまって安定性が悪いという問題点
がある。また、成形品の離型性や熱剛性が悪いといった
問題点がある。
Some unsaturated polyester resin compositions include, for example, unsaturated polyester, a crosslinking agent such as styrene, and a melamine resin, and depending on the application, a desired base material, curing agent, mold release agent, pigment, etc. is blended. However, this unsaturated polyester resin composition has a problem in that the reaction of the melamine resin progresses during kneading, resulting in poor stability. Further, there are problems in that the molded product has poor mold releasability and thermal rigidity.

〔発明の目的〕[Purpose of the invention]

この発明は、以上のことに鑑みて、成形品の離型性およ
び熱剛性が改善され、安定性も向上した不飽和ポリエス
テル樹脂組成物を提供することを目的とする。
In view of the above, an object of the present invention is to provide an unsaturated polyester resin composition in which molded products have improved mold releasability and thermal rigidity, as well as improved stability.

〔発明の開示〕[Disclosure of the invention]

この発明は、上記目的を達成するため、不飽和ポリエス
テル、重合性二重結合を有する架橋剤、および、メラミ
ン樹脂を含む不飽和ポリエステル樹脂組成物であって、
前記不飽和ポリエステルとして酸価の低いもめが用いら
れていることを特徴とする不飽和ポリエステル樹脂組成
物を要旨とする。
In order to achieve the above object, the present invention provides an unsaturated polyester resin composition comprising an unsaturated polyester, a crosslinking agent having a polymerizable double bond, and a melamine resin,
The gist of the present invention is an unsaturated polyester resin composition characterized in that a polyester having a low acid value is used as the unsaturated polyester.

以下に、この発明の詳細な説明する。The present invention will be explained in detail below.

この発明にかかる不飽和ポリエステル樹脂組成物では、
不飽和ポリエステルとして酸価の低いものを用いている
。従来のように、酸価の大きい(たとえば、酸価25程
度)あるいは酸価のばらつきの大きい不飽和ポリエステ
ルを用いると、メラミン樹脂の反応が促進されたり反応
がばらついたりするため、混練時に流動性が悪くなり、
これにより成形性が悪くなる。不飽和ポリエステルの酸
価は、特に限定はないが、たとえば、20以下であるこ
とが好ましく、15〜20がより好ましい。酸価が20
を上回ると、ゲル条件での成形性が安定しなくなること
がある。また、酸価が15を下回ると、不飽和ポリエス
テルの反応性がなくなることがあり、硬化が遅くなるこ
とがある。
In the unsaturated polyester resin composition according to this invention,
An unsaturated polyester with a low acid value is used. If unsaturated polyester with a high acid value (for example, about 25) or with a large variation in acid value is used as in the past, the reaction of the melamine resin will be accelerated or the reaction will vary, so the fluidity during kneading will be reduced. becomes worse,
This deteriorates moldability. The acid value of the unsaturated polyester is not particularly limited, but is preferably, for example, 20 or less, more preferably 15 to 20. Acid value is 20
If it exceeds , moldability under gel conditions may become unstable. Moreover, if the acid value is less than 15, the reactivity of the unsaturated polyester may be lost, and curing may be delayed.

不飽和ポリエステルは、たとえば、不飽和二塩基酸およ
び飽和二塩基酸と多価アルコールとを反応させて得られ
る。不飽和二塩基酸としては、たとえば、無水マレイン
酸、マレイン酸、フマル酸などが挙げられるが、これら
に限定されない。飽和二塩基酸としては、たとえば、無
水フタル酸、アジピン酸、イソフタル酸などが挙げられ
るが、これらに限定されない。多価アルコールとしては
、たとえば、エチレングリコール、プロピレングリコー
ル、ジエチレングリコールなどの二価アルコールが挙げ
られるが、これらに限定されず、また、他の多価アルコ
ールを使用してもよい。
Unsaturated polyester is obtained, for example, by reacting an unsaturated dibasic acid, a saturated dibasic acid, and a polyhydric alcohol. Examples of unsaturated dibasic acids include, but are not limited to, maleic anhydride, maleic acid, and fumaric acid. Examples of the saturated dibasic acid include, but are not limited to, phthalic anhydride, adipic acid, and isophthalic acid. Examples of polyhydric alcohols include dihydric alcohols such as ethylene glycol, propylene glycol, and diethylene glycol, but are not limited thereto, and other polyhydric alcohols may also be used.

この発明に使用される重合性二重結合を有する架橋剤と
しては、特に限定はないが、たとえば、ジアリルフタレ
ート(DAP) 、スチレン等のビニルモノマ−1これ
らのビニルモノマーのプレポリマーおよびポリマー、た
とえば、DAPポリマーなどが挙げられる。これらは、
それぞれ、単独でまたは2つ以上併せて用いられる。
The crosslinking agent having a polymerizable double bond used in this invention is not particularly limited, but includes, for example, vinyl monomers such as diallylphthalate (DAP) and styrene, prepolymers and polymers of these vinyl monomers, for example, Examples include DAP polymer. these are,
Each may be used alone or in combination of two or more.

この発明に使用されるメラミン樹脂は、特に限定されな
いが、たとえば、メラミンとホルムアルデヒドとを反応
させてなるものが挙げられる。メラミン樹脂は、この発
明の不飽和ポリエステル樹脂組成物を増粘して充填性を
良くするために配合される。配合量は、特に限定されな
いが、不飽和ポリエステル、架橋剤、硬化剤、および、
メラミン樹脂の合計重量中40〜70重量%を占めるこ
とが好ましい。この範囲を外れると、前記の働きをしな
いことがある。たとえば、メラミン樹脂:(不飽和ポリ
エステル、架橋剤、硬化剤)=6=4の割合で使用され
る。
The melamine resin used in this invention is not particularly limited, but examples include those made by reacting melamine and formaldehyde. The melamine resin is blended in order to thicken the unsaturated polyester resin composition of the present invention and improve its filling properties. The blending amount is not particularly limited, but includes an unsaturated polyester, a crosslinking agent, a curing agent, and
It is preferable that it accounts for 40 to 70% by weight of the total weight of the melamine resin. If it is outside this range, it may not function as described above. For example, the ratio of melamine resin: (unsaturated polyester, crosslinking agent, curing agent) = 6 = 4 is used.

この発明の不飽和ポリエステル樹脂組成物には、以上の
配合物の他に、用途に応じて、所望の基材、硬化剤、離
型剤、顔料などが配合される。基材としては、たとえば
、ガラス繊維、炭酸カルシウムなどの無機充填材などが
用いられる。硬化剤としては、たとえば、ジクミルパー
オキサイドなどの有機過酸化物などが用いられる。離型
剤としては、たとえば、ステアリン酸亜鉛などが用いら
れる。顔料としては、二酸化チタンなどが用いられる。
In addition to the above ingredients, the unsaturated polyester resin composition of the present invention may contain a desired base material, curing agent, mold release agent, pigment, etc., depending on the intended use. As the base material, for example, glass fiber, inorganic filler such as calcium carbonate, etc. are used. As the curing agent, for example, an organic peroxide such as dicumyl peroxide is used. As the mold release agent, for example, zinc stearate or the like is used. Titanium dioxide or the like is used as the pigment.

以上の各配合物は、たとえば、公知または周知の適宜の
装置・方法により、分散混合され、適宜の温度で成形さ
れる。これら各配合物が分散混合されたこの発明の不飽
和ポリエステル樹脂組成物は、混練時の安定性が良く、
離型性が良く、熱Mll性が良い。発明者が調べたとこ
ろ、酸価以外は同じにしたこの発明の不飽和ポリエステ
ル樹脂組成物と従来の不飽和ポリエステル樹脂組成物と
では、第1表にみるような物性の改善が見られた。各物
性は、下記実施例および比較例の評価と同様に調べた。
Each of the above-mentioned formulations is dispersed and mixed using, for example, known or well-known appropriate equipment and methods, and molded at an appropriate temperature. The unsaturated polyester resin composition of the present invention, in which these various compounds are dispersed and mixed, has good stability during kneading,
Good mold releasability and good thermal Mll properties. Upon investigation by the inventor, it was found that the unsaturated polyester resin composition of the present invention and the conventional unsaturated polyester resin composition, which were the same except for the acid value, had improved physical properties as shown in Table 1. Each physical property was investigated in the same manner as the evaluation of the following Examples and Comparative Examples.

ロール条件での成形性は、2本ロール(1本は100℃
、もう1本は120℃)で混練したのち、2龍φのノズ
ルから流れ出させる圧力〔kg/π薦廁2〕を粘度とし
て表示した。
Formability under roll conditions was determined by two rolls (one rolled at 100°C).
, and the other one at 120° C.), and the pressure [kg/π recommendation 2] at which the mixture was flowed out from the 2-diameter nozzle was expressed as the viscosity.

第   1   表(注)π・・・円周率なお、発明者が調べたところでは、不飽和ポリエステル
樹脂組成物の成形性が悪くなる原因の1つに、不飽和ポ
リエステルが充分に反応していないことも挙げられるこ
とがわかった。この発明では、重合性二重結合を有する
架橋剤を、不飽和ポリエステルに対して過剰にすると、
さらに成形性が向上するので好ましい。ここで、過剰と
は、不飽和ポリエステルを架橋させるのに必要な架橋剤
の量よりも多い量であり、経験的にあるいは化学構造よ
り求められる。たとえば、不飽和ポリエステルの不飽和
結合に対して架橋剤の重合性二重結合が過剰となるよう
に、不飽和ポリエステルに対して架橋剤を配合するので
ある。特に限定されないが、1例を示すと、不飽和ポリ
エステル106重量部に対し、架橋剤を6.0〜7.6
重量部(平均6.8重量部)必要とする場合には、12
〜15重量部とするのが好ましい。架橋剤がこれよりも
少ないと、不飽和ポリエステルが架橋反応しないことが
ある。架橋剤がこの範囲よりも多い場合には、未反応の
架橋剤が残ることがある。また、架橋剤を従来よりも多
く配合する場合には、硬化剤は、不飽和ポリエステルと
架橋剤との合計量に対応する理論量に増量させるのが好
ましい。
Table 1 (Note) π...Pi The inventor has investigated that one of the causes of poor moldability of unsaturated polyester resin compositions is that the unsaturated polyester has not reacted sufficiently. It turns out that there are things that don't exist. In this invention, when the crosslinking agent having a polymerizable double bond is used in excess of the unsaturated polyester,
Furthermore, moldability is improved, which is preferable. Here, the term "excess" refers to an amount greater than the amount of crosslinking agent required to crosslink the unsaturated polyester, and is determined empirically or from the chemical structure. For example, the crosslinking agent is blended with the unsaturated polyester so that the number of polymerizable double bonds in the crosslinking agent is in excess of the unsaturated bonds in the unsaturated polyester. Although not particularly limited, to give an example, 6.0 to 7.6 parts of crosslinking agent is added to 106 parts by weight of unsaturated polyester.
parts by weight (average 6.8 parts by weight) if required, 12 parts by weight
It is preferable to set it as 15 parts by weight. If the amount of crosslinking agent is less than this, the unsaturated polyester may not undergo the crosslinking reaction. When the amount of crosslinking agent exceeds this range, unreacted crosslinking agent may remain. In addition, when a larger amount of crosslinking agent than before is added, it is preferable to increase the amount of the curing agent to a theoretical amount corresponding to the total amount of the unsaturated polyester and the crosslinking agent.

以下に、実施例および比較例を示すが、この発明は下記
実施例に限定されない。
Examples and comparative examples are shown below, but the present invention is not limited to the following examples.

(実施例1〜3および比較例)第2表に示す配合の不飽和ポリエステル樹脂組成物を分
散混合した後、表面をあらした金型で成形して成形品を
得た。
(Examples 1 to 3 and Comparative Examples) Unsaturated polyester resin compositions having the formulations shown in Table 2 were dispersed and mixed, and then molded using a mold with a roughened surface to obtain molded products.

なお、比較例の架橋剤の配合は、ここで用いた各不飽和
ポリエステルの架橋剤必要量(理論量)であった。
In addition, the crosslinking agent formulation in the comparative example was the required amount (theoretical amount) of the crosslinking agent for each unsaturated polyester used here.

各側につき、離型性、熱剛性、型温170〜180℃で
のふくれ(あるいは、はじけ)の有無、および、ロール
条件での成形性をそれぞれ調べ、結果を第2表に示した
Each side was examined for mold releasability, thermal rigidity, presence or absence of blistering (or popping) at a mold temperature of 170 to 180°C, and formability under roll conditions, and the results are shown in Table 2.

離型性は、いずれも、表面をあらした同じ金型で成形し
て、成形品のはがれ具合を定性的に調べ、×(悪い)−
△−〇〜△−〇(良好)で評価した。
The mold releasability was determined by molding in the same mold with a roughened surface and qualitatively examining the degree of peeling of the molded product.
Evaluation was made from △-〇 to △-〇 (good).

熱剛性は、いずれも、同じ条件で成形した同じ大きさ・
形状の成形品に、成形して10秒間後に同様に加重した
ときの変形量を求めた。この変形量が少ないほど熱剛性
が良い。
Thermal rigidity is the same for all molded under the same conditions.
The amount of deformation was determined when a similar weight was applied to the shaped molded product 10 seconds after molding. The smaller the amount of deformation, the better the thermal rigidity.

ロール条件での成形性は、いずれも、同じ条件で加熱加
圧混練を2本ロール(1本は100℃、もう1本は12
0℃)で行ったときに、混練時間の経過(ロール回数の
増加)により樹脂組成物の粘度が変化するのを調べ、×
(変化大)−△−Δ〜〇−〇(変化小)で評価した。
The moldability under roll conditions was determined by heating and pressure kneading under the same conditions using two rolls (one at 100°C and the other at 120°C).
0°C), the viscosity of the resin composition changed with the elapse of kneading time (increase in the number of rolls), and
Evaluation was made from -Δ-Δ (large change) to 〇-〇 (small change).

第2表にみるように、酸価の低い不飽和ポリエステルを
用いた実施例1〜3はいずれも、比較例に比べて、ロー
ル条件での成形性および熱剛性が良く、離型性も同等以
上であった。また、架橋剤を過剰にした実施例2.3で
は、170〜180℃でのふくれがなく、優れていた。
As shown in Table 2, Examples 1 to 3, which used unsaturated polyester with a low acid value, had better formability and thermal rigidity under roll conditions than the comparative example, and had the same mold release properties. That was it. In addition, Example 2.3 in which the crosslinking agent was added in excess was excellent in that there was no blistering at 170 to 180°C.

〔発明の効果〕〔Effect of the invention〕

この発明にかかる不飽和ポリエステル樹脂組成物は、以
上のように、メラミン樹脂が含まれていて、不飽和ポリ
エステルとして酸価の低いものが用いられているので、
離型性および熱剛性が改善され、安定性も向上している
As described above, the unsaturated polyester resin composition according to the present invention contains a melamine resin and uses an unsaturated polyester with a low acid value.
Improved mold releasability and thermal rigidity, as well as improved stability.

代理人 弁理士  松 本 武 彦Agent: Patent Attorney Takehiko Matsumoto

Claims (2)

Translated fromJapanese
【特許請求の範囲】[Claims](1)不飽和ポリエステル、重合性二重結合を有する架
橋剤、および、メラミン樹脂を含む不飽和ポリエステル
樹脂組成物であって、前記不飽和ポリエステルとして酸
価の低いものが用いられていることを特徴とする不飽和
ポリエステル樹脂組成物。
(1) An unsaturated polyester resin composition containing an unsaturated polyester, a crosslinking agent having a polymerizable double bond, and a melamine resin, in which an unsaturated polyester with a low acid value is used. Characteristic unsaturated polyester resin composition.
(2)架橋剤が不飽和ポリエステルに対し過剰に含まれ
ている特許請求の範囲第1項記載の不飽和ポリエステル
樹脂組成物。
(2) The unsaturated polyester resin composition according to claim 1, wherein the crosslinking agent is contained in excess of the unsaturated polyester.
JP29817987A1987-11-261987-11-26Unsaturated polyester resin compositionPendingJPH01139641A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP29817987AJPH01139641A (en)1987-11-261987-11-26Unsaturated polyester resin composition

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP29817987AJPH01139641A (en)1987-11-261987-11-26Unsaturated polyester resin composition

Publications (1)

Publication NumberPublication Date
JPH01139641Atrue JPH01139641A (en)1989-06-01

Family

ID=17856236

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP29817987APendingJPH01139641A (en)1987-11-261987-11-26Unsaturated polyester resin composition

Country Status (1)

CountryLink
JP (1)JPH01139641A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2004517545A (en)*2000-12-282004-06-10アンビエント・コーポレイション Inductive coupling of data signals to power transmission cables
JP2008156230A (en)*2008-03-212008-07-10Kao Corp Manufacturing method of molded body
KR101254296B1 (en)*2012-11-222013-04-12동화홀딩스 주식회사Manufacturing method of melamine resin having excellent gloss and adhesion and melamine resin using the manufacturing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2004517545A (en)*2000-12-282004-06-10アンビエント・コーポレイション Inductive coupling of data signals to power transmission cables
JP2008156230A (en)*2008-03-212008-07-10Kao Corp Manufacturing method of molded body
KR101254296B1 (en)*2012-11-222013-04-12동화홀딩스 주식회사Manufacturing method of melamine resin having excellent gloss and adhesion and melamine resin using the manufacturing method

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