KR100484384B1 - The rubber composition with improvement of process - Google Patents

The rubber composition with improvement of process Download PDF

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Publication number
KR100484384B1
KR100484384B1 KR10-2002-0043503A KR20020043503A KR100484384B1 KR 100484384 B1 KR100484384 B1 KR 100484384B1 KR 20020043503 A KR20020043503 A KR 20020043503A KR 100484384 B1 KR100484384 B1 KR 100484384B1
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phr
rubber composition
pvi
rubber
present
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KR10-2002-0043503A
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Korean (ko)
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KR20040009523A (en
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이화우
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금호타이어 주식회사
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/08—Epoxidation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/43—Compounds containing sulfur bound to nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00—Compositions of natural rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/262—Alkali metal carbonates

Abstract

본 발명은 공정성이 개선된 고무 조성물에 관한 것으로서, 좀더 상세하게는 에폭시화 천연고무에 염기와 PVI를 동시에 첨가하므로써 공정성이 개선된 고무 조성물에 관한 것이다.The present invention relates to a rubber composition having improved processability, and more particularly, to a rubber composition having improved processability by simultaneously adding a base and PVI to an epoxidized natural rubber.

Description

공정성이 개선된 고무 조성물{The rubber composition with improvement of process}The rubber composition with improvement of process

본 발명은 공정성이 개선된 고무 조성물에 관한 것으로서, 좀더 상세하게는 에폭시화 천연고무에 염기와 PVI를 동시에 첨가하므로써 공정성이 개선된 고무 조성물에 관한 것이다.The present invention relates to a rubber composition having improved processability, and more particularly, to a rubber composition having improved processability by simultaneously adding a base and PVI to an epoxidized natural rubber.

천연고무의 불포화기에 에폭시기를 도입한 에폭시화 천연고무는 일반 천연고무에 비해서 강도는 유지되면서, 천연고무의 주쇄에 에폭시기가 부가되어 있어서 유리전이온도(glass transition temperature ; Tg)가 상승하므로, 타이어 트레드 고무에 사용할 경우에는 제동력이 급격히 향상될 뿐만 아니라, 타이어의 인너라이너 고무 또는 튜브고무로 사용하면 내공기투과성이 향상되어 여러 방면으로의 이용이 가능하다. 그러나 스코치타임(scorch time ; t5)이 천연고무에 비해서 매우 짧아서 실제 제품에 응용하는 것은 많은 제약을 받고 있다.Epoxidized natural rubber, in which epoxy group is introduced into unsaturated group of natural rubber, maintains its strength compared to general natural rubber, while epoxy resin is added to the main chain of natural rubber to increase glass transition temperature (Tg). When used in rubber, not only the braking force is rapidly improved, but also used as the inner liner rubber or tube rubber of the tire, the air permeability is improved, and thus it can be used in various fields. However, because the scorch time (t5) is very short compared to natural rubber, its application to real products is very limited.

에폭시화 천연고무(Epoxidized Natural Rubber ; ENR)는 상기와 같이 양호한 물성 때문에 이용가치가 충분하지만, 스코치타임이 짧아서 제품으로의 사용이 제한되므로, 이를 개선하고자 종래에는 PVI(가황지연제 : Pre-vulcanization inhibitor)를 사용하였으나 그 개선효과가 크지 않았다.Epoxidized Natural Rubber (ENR) has sufficient value due to the good physical properties as described above, but its use as a product is limited due to the short scorch time. inhibitors were used, but the improvement was not significant.

따라서, 고무를 가공하는데 많은 열이 축적되는 공정 또는 높은 온도에서 장시간의 공정이 이루어져야 하는 부품에 이용하는 데에는 충분치 않았다.Therefore, it was not sufficient for use in a process in which a lot of heat is accumulated for processing rubber, or a part that requires a long process at a high temperature.

본 발명은 상기와 같은 문제점을 개선하기 위한 것으로, 본 발명의 목적은 에폭시화 천연고무에 염기와 PVI를 함께 첨가하므로써 공정성이 개선된 고무 조성물을 제공하는 것이다.The present invention is to improve the above problems, an object of the present invention is to provide a rubber composition with improved processability by adding a base and PVI to the epoxidized natural rubber.

본 발명의 고무 조성물은 에폭시화 천연고무 100phr에 대하여 염기 0.3∼4.0phr과 PVI 0.1∼0.3phr을 동시에 첨가하여 이루어지는 것을 특징으로 한다.The rubber composition of the present invention is characterized by adding 0.3 to 4.0 phr base and 0.1 to 0.3 phr of PVI simultaneously with respect to 100 phr of epoxidized natural rubber.

본 발명에 사용되는 염기로는, 알칼리금속염 또는 알칼리토금속염을 사용할 수 있으며, 특히 탄산나트륨(Na2CO3)이나 칼슘스테아레이트(calcium stearate)가 바람직하다. 탄산나트륨은 0.3∼1.0phr 사용하는 것이 바람직하며, 이는 강한 염기성 재료이므로 소량만 사용하여도 효과가 있다. 그러나, 0.3phr 미만을 사용할 경우에는 공정성 개선효과가 크지 않고, 1.0phr을 초과하여 사용하는 경우에는 가류시간이 길어져서 생산성이 저하되는 단점이 있다. 또한, 칼슘스테아레이트는 2.0∼4.0phr을 사용하는 것이 바람직하며, 이는 탄산나트륨에 비해 약한 염기성 재료이므로 탄산나트륨의 사용량보다는 많이 사용해야 한다. 그러나, 2.0phr 미만을 사용할 경우에는 공정성 개선효과가 적었고, 4.0phr을 초과하여 사용할 경우에는 공정성 개선의 증가효가가 미미하였다.As the base used in the present invention, an alkali metal salt or an alkaline earth metal salt may be used, and sodium carbonate (Na 2 CO 3 ) or calcium stearate is particularly preferable. It is preferable to use 0.3 to 1.0 phr of sodium carbonate, which is effective even if only a small amount is used since it is a strong basic material. However, when less than 0.3 phr is used, the processability improvement effect is not large, and when it is used in excess of 1.0 phr, there is a disadvantage in that productivity is reduced due to a long vulcanization time. In addition, calcium stearate is preferably used from 2.0 to 4.0 phr, which is a weak basic material compared to sodium carbonate, so should be used more than the amount of sodium carbonate used. However, when less than 2.0phr was used, the effect of improving fairness was small, and when it was used more than 4.0phr, the increase effect of fairness was insignificant.

본 발명에서 가황지연제로서 사용되는 PVI(Pre-vulcanization inhibitor)는 종래에 공지된 종류들을 사용할 수 있으며, 바람직한 예로는 N-(시클로헥실티오)프탈이미드를 들 수 있다. 그 함량은 0.1∼0.3phr을 사용하는 것이 바람직한데, 0.1phr 미만 사용하는 경우에는 효과가 미미하고, 0.3phr을 초과하여 사용하는 경우 가류시간도 길어지는 단점이 있다.Pre-vulcanization inhibitor (PVI) used as a vulcanization retardant in the present invention may use conventionally known types, and preferred examples thereof include N- (cyclohexylthio) phthalimide. It is preferable to use the content of 0.1 to 0.3 phr, the use of less than 0.1 phr is ineffective, the use of more than 0.3 phr has a disadvantage that the longer the vulcanization time.

본 발명의 고무 조성물에는 통상적인 고무 조성물용 첨가제들, 예로서 카본블랙, 산화아연, 스테아린산, 공정오일, 노방제, 촉진제, 황 등의 첨가제들을 적절히 선택하여 첨가할 수 있으며, 이러한 첨가제들의 선택 및 사용량은 당분야에서는 공지이다.In the rubber composition of the present invention, additives for conventional rubber compositions, such as carbon black, zinc oxide, stearic acid, process oils, preservatives, accelerators, sulfur and the like, may be appropriately selected and added. The amount used is known in the art.

이하, 본 발명을 하기의 실시예 및 비교예에 의하여 보다 구체적으로 설명한다. 하기의 실시예는 본 발명을 예시하기 위한 예에 지나지 않으며, 본 발명의 보호범위를 제한하고자 하는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following Examples and Comparative Examples. The following examples are merely examples for illustrating the present invention and are not intended to limit the protection scope of the present invention.

실시예 및 비교예Examples and Comparative Examples

하기 실시예 및 비교예에서의 고무 조성물의 조성비와 스코치타임을 표 1에 나타내었다.Table 1 shows the composition ratio and scotch time of the rubber composition in the following Examples and Comparative Examples.

<비교예 1>Comparative Example 1

ENR50 100phr, 카본블랙 50phr, 산화아연 5phr, 스테아린산 2phr, 공정오일 6phr, 노방제 1phr을 사용하여 160℃에서 방출하였으며, 4시간 방치후 촉진제 1phr 및 황 2phr을 사용하여 110℃에서 방출시켰다.100 phr of ENR50, 50 phr of carbon black, 5 phr of zinc oxide, 2 phr of stearic acid, 6 phr of process oil, and 1 phr of a preservative were released at 160 ° C., and left at 110 ° C. using 1 phr of accelerator and 2 phr of sulfur after 4 hours.

스코치타임은 무니점도계(MOONEY VISCOSITY)를 이용하여 125℃에서 측정하였다.Scotch time was measured at 125 ° C using a Mooney Viscometer (MOONEY VISCOSITY).

<비교예 2>Comparative Example 2

탄산나트륨을 0.6phr 사용한 것 이외에는 비교예 1과 동일한 배합비를 사용하였으며, 물리적 성질의 측정결과는 표 1에 나타내었다.Except that 0.6 phr of sodium carbonate was used, the same compounding ratio as in Comparative Example 1 was used, and the measurement results of the physical properties are shown in Table 1.

<비교예 3>Comparative Example 3

PVI를 0.2phr 사용한 것 이외에는 비교예 1과 동일한 배합비를 사용하였으며, 물리적 성질의 측정결과는 표 1에 나타내었다.Except for using 0.2phr of PVI, the same compounding ratio as in Comparative Example 1 was used, and the measurement results of the physical properties are shown in Table 1.

<실시예 1><Example 1>

탄산나트륨 0.6phr과 PVI 0.2phr을 사용하는 것 이외에는 비교예 1과 동일한 배합비를 사용하였으며, 물리적 성질의 측정결과는 표 1에 나타내었다.Except for using 0.6phr of sodium carbonate and 0.2phr of PVI, the same compounding ratio as in Comparative Example 1 was used, and the measurement results of the physical properties are shown in Table 1.

(단위 : phr)                                                                 (Unit: phr) 비교예 1Comparative Example 1 비교예 2Comparative Example 2 비교예 3Comparative Example 3 실시예 1Example 1 ENR50카본블랙산화아연스테아린산공정오일노방제탄산나트륨촉진제황*PVIENR50 Carbon Black Zinc Oxide Stearic Acid Process Oil Preservative Sodium Carbonate Accelerator Sulfur * PVI 10050526101201005052610120 1005052610.61201005052610.6120 1005052610120.21005052610120.2 1005052610.6120.21005052610.6120.2 **스코치 타임(T5)** Scotch Time (T5) 100100 140140 110110 190190

* PVI ; N-(cyclohexylthio)phthalimide* PVI; N- (cyclohexylthio) phthalimide

**비교예 1을 100으로 한 상대치로서, 높을수록 양호함** Relative value using Comparative Example 1 as 100, the higher the better

상기 표 1에 나타난 바와 같이, 실시예 1의 경우 염기성 재료인 탄산나트륨과 PVI를 동시에 적정량 혼용하여 사용하면, 탄산나트륨이나 PVI를 단독으로 사용한 경우보다 스코치타임이 길어져서 실제 가공성이 향상됨을 알 수 있다.As shown in Table 1, in the case of Example 1, when using a basic amount of sodium carbonate and PVI mixed with an appropriate amount at the same time, it can be seen that the scorch time is longer than the case of using sodium carbonate or PVI alone, the actual workability is improved.

이상에서 볼 수 있는 바와 같이, 본 발명에 의해 제조된 고무 조성물은 염기와 지연제인 PVI를 함께 사용하므로써 공정성이 개선되는 효과를 갖는다.As can be seen from the above, the rubber composition produced by the present invention has the effect of improving the processability by using a base and PVI which is a retarder.

Claims (2)

에폭시화 천연고무 100phr에 대하여, 염기 0.3∼4.0phr과 PVI 0.1∼0.3phr을 포함하여 이루어지는 것을 특징으로 하는 고무 조성물.A rubber composition comprising 0.3 to 4.0 phr of base and 0.1 to 0.3 phr of PVI with respect to 100 phr of epoxidized natural rubber. 제 1항에 있어서, 상기 염기는 탄산나트륨 0.3∼1.0phr 또는 칼슘스테아레이트 2∼4phr인 것을 특징으로 하는 고무 조성물.The rubber composition according to claim 1, wherein the base is 0.3 to 1.0 phr sodium carbonate or 2 to 4 phr calcium stearate.
KR10-2002-0043503A 2002-07-24 2002-07-24 The rubber composition with improvement of process KR100484384B1 (en)

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Publication number Priority date Publication date Assignee Title
EP1798257B1 (en) * 2005-12-19 2010-05-19 Sumitomo Rubber Industries, Ltd. Rubber composition for inner liner and tire having an inner liner using the same rubber composition

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61212559A (en) * 1985-03-18 1986-09-20 Toray Ind Inc Production of high-purity n-(cyclohexylthio)-phthalimide
US4857571A (en) * 1988-03-03 1989-08-15 Sartomer Company, Inc. Prevulcanization retardation of free-radical cured rubber
US4861842A (en) * 1988-12-28 1989-08-29 The Goodyear Tire & Rubber Company Cure system for sulfur vulcanizable rubber
EP0570277A1 (en) * 1992-05-13 1993-11-18 Sartomer Company, Inc. Method for adhering an elastomeric composition to a polar surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61212559A (en) * 1985-03-18 1986-09-20 Toray Ind Inc Production of high-purity n-(cyclohexylthio)-phthalimide
US4857571A (en) * 1988-03-03 1989-08-15 Sartomer Company, Inc. Prevulcanization retardation of free-radical cured rubber
US4861842A (en) * 1988-12-28 1989-08-29 The Goodyear Tire & Rubber Company Cure system for sulfur vulcanizable rubber
EP0570277A1 (en) * 1992-05-13 1993-11-18 Sartomer Company, Inc. Method for adhering an elastomeric composition to a polar surface

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