KR19990025438A - Non-discoloration water-dispersion type polyurethane coating for leather coating - Google Patents
Non-discoloration water-dispersion type polyurethane coating for leather coating Download PDFInfo
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Abstract
[명칭][designation]
피혁 코팅용 비변색 수분산형 폴리우레탄 코팅제Non-discoloration water-dispersion type polyurethane coating for leather coating
[과제][assignment]
종래 피혁용 탑-코팅제로서 폴리올 성분으로 폴리에스테르계 폴리올을 이용하는 경우가 많았는데, 내알카리성 및 내가수분해성이 문제점으로 대두되었던 바 이를 개선하기 위해 폴리실록산디올과 같은 폴리올을 사용하였으나 크게 실용화되지는 못하였다. 또한 용제형 폴리우레탄계 수지는 인화성이 강하고 독성이 높은 유기용제를 다량 사용하고 있어 환경치화적이지 못하며 인체나 환경에 유해하였다.In the past, polyester-based polyols were often used as a polyol component as a leather top-coating agent, but polyols such as polysiloxane diols were used to improve the alkali resistance and hydrolysis resistance. It was. In addition, solvent-type polyurethane-based resins are highly flammable and highly toxic organic solvents are not environmentally harmful and harmful to the human body or the environment.
[해결수단][Resolution]
폴리올 및 카르복실기를 갖는 폴리올과 디이소시아네이트 및 쇄연장제를 반응시켜 얻어진 폴리우레탄 수분산체에 있어서 주 폴리올을 폴리카프로락톤디올 및 폴리카보네이트 폴리올로 하고 다른 폴리올을 병용하여 지방족 또는 지환족 디이소시아네이트와 폴리올아민계 쇄연장제를 사용하여 제조된 피혁 코팅용 비변색 수분산형 폴리우레탄 코팅제로써 해결함.In the polyurethane water dispersion obtained by reacting a polyol having a polyol and a carboxyl group with a diisocyanate and a chain extender, the main polyol is a polycaprolactone diol and a polycarbonate polyol, and an aliphatic or alicyclic diisocyanate and a polyolamine are used in combination with another polyol. Solved by a non-discolored water-dispersed polyurethane coating for leather coatings made with chain extenders.
Description
본 발명은 필름의 물성이 우수하면서 내수성, 내용제성, 내광성 및 내가수분해성이 양호한 효과를 얻을 수 있는 피혁 코팅용 비변색 수분산형 폴리우레탄 코팅제에 관한 것이다.The present invention relates to a non-discolored, water-dispersible polyurethane coating for leather coating, which is excellent in physical properties of the film and has a good effect of water resistance, solvent resistance, light resistance and hydrolysis resistance.
종래 피혁용 탑-코팅제로서 우레탄계 수지, 아크릴계 수지, 에폭시계 수지, 염화비닐계 수지, 니트로셀룰로즈계 수지, 멜라민계 수지 등 여러 가지 수지가 이용되어 왔으며 특히 고기능성과 감성을 만족시켜 줄 수 있는 용제형 폴리우레탄계 수지가 주로 사용되어 왔다.As a top coating agent for leather, various resins such as urethane resin, acrylic resin, epoxy resin, vinyl chloride resin, nitrocellulose resin, melamine resin, and the like have been used. Polyurethane-based resins have been mainly used.
코팅용 폴리우레탄 수지에는 내후성, 내열성 및 필름물성의 우수함이 요구되며 이를 만족시키기 위해 종래에는 폴리올 성분으로 폴리에스테르계 폴리올을 이용하는 경우가 많았는데, 내알칼리성 및 내가수성분해성이 문제점으로 대두되었던 바 이를 개선하기 위해 폴리실록산디올과 같은 폴리올을 사용하였으나 크게 실용화되지는 못하였다.Polyurethane resins for coating are required to have excellent weather resistance, heat resistance and film properties, and in order to satisfy this, polyester polyols were often used as polyol components. Alkali resistance and hydrolysis resistance were raised due to problems. Polyols, such as polysiloxane diols, were used to improve, but have not been very practical.
또한 용제형 폴리우레탄계 수지는 인화성이 강하고 독성이 높은 유기용제를 다량 사용하고 있어 환경친화적이지 못하여 분산매체로서 인체나 환경에 악영향이 극히 적은 물을 사용한 에멀젼형 코팅제의 요구가 높아지고 있다.In addition, since the solvent-type polyurethane-based resin uses a large amount of highly flammable and highly toxic organic solvents, it is not environmentally friendly, and there is an increasing demand for an emulsion-type coating agent using water having extremely low adverse effects on the human body or the environment as a dispersion medium.
이에 대응하여 우레탄수지계나 아크릴수지계 등의 에멀젼형 코팅제 개발의 시도가 행해지고 있으며 특히 폴리우레탄계 수분산체는 유화제를 사용하지 않고 분산시키는 자기유화형 수지가 개발되어 연구가 활발하나 아직 충분히 만족스러운 물성을 나타내지 못하여 널리 쓰이지 못하고 있는 실정이다.In response, attempts have been made to develop emulsion-type coating agents such as urethane resins and acrylic resins, and in particular, self-emulsifying resins that disperse polyurethane-based dispersions without using emulsifiers have been actively researched, but do not exhibit sufficiently satisfactory physical properties. The situation is not widely used.
본 발명인들은 이러한 환경친화적인 요구에 부응하면서 내수성, 내용제성 등의 제반물성을 만족시킬 수 있는 수분산형 폴리우레탄 수지를 얻고자 연구 검토한 결과 폴리카프로락톤 디올 및 폴리카보네이트 폴리올을 주 폴리올로 사용하여 NCO/OH 비를 적절히 조절하고 폴리아만으로 쇄연장한 음이온성 자기유화형 폴리우레탄 수분산체를 제조함으로써 내후성 및 제반물성이 우수한 수분산체를 얻을 수 있었다.The inventors of the present invention conducted a study to obtain a water-dispersed polyurethane resin that can satisfy various environmental properties such as water resistance and solvent resistance while meeting these environmentally friendly demands, using polycaprolactone diol and polycarbonate polyol as main polyols. By properly adjusting the NCO / OH ratio and preparing an anionic self-emulsifying polyurethane water dispersion chain extended with polyaman, a water dispersion having excellent weather resistance and various properties was obtained.
즉, 폴리카프로락톤 디올 및 폴리카보네이트 폴리올을 지방족 또는 지환족 디이소시아네이트와 반응시켜 얻어진 카르복실기 함유 말단 이소시아네이트형 프리폴리머를 폴리아민으로 쇄연장시켜 비변색형의 물성이 우수한 폴리 우레탄 수분산체를 얻을 수 있었다.That is, the carboxyl group-containing terminal isocyanate type prepolymer obtained by reacting polycaprolactone diol and polycarbonate polyol with aliphatic or cycloaliphatic diisocyanate was chain-extended with polyamine to obtain a polyurethane water dispersion having excellent non-discoloring physical properties.
이하 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.
본 발명에 사용되는 카르복실기 함유 말단 이소시아네이트형 폴리우레탄 프리폴리머는 종전의 방법대로 폴리올과 카르복실기 함유 폴리올 및 지방족 또는 지환족 디이소시아네이트를 NCO/OH비 1.5-4.0의 범위에서 반응시켜 제조한다.The carboxyl group-containing terminal isocyanate type polyurethane prepolymer used in the present invention is prepared by reacting a polyol, a carboxyl group-containing polyol, and an aliphatic or alicyclic diisocyanate in the range of NCO / OH ratio 1.5-4.0 according to the conventional method.
NCO/OH비는 요구되는 필름 물성에 의해 조정될 수 있으며 유연한 필름을 얻고자 할 경우에는 낮게, 딱딱한 필름을 얻고자 할 경우에는 높게 선정하여 반응시킨다.The NCO / OH ratio can be adjusted by the required film properties and is selected to be low for obtaining a flexible film and high for obtaining a rigid film.
NCO/OH비 1.5 이하에서는 필름이 유연해지나 내용제성 및 내가수분해성 등을 만족시킬 수 없으며 4.0 이상이 되면 상온에서 필름을 형성하기 어렵게 된다.At an NCO / OH ratio of 1.5 or less, the film becomes soft, but it cannot satisfy solvent resistance and hydrolysis resistance, and when it is 4.0 or more, it becomes difficult to form a film at room temperature.
본 발명에 사용되는 폴리올은 화합물 중에 적어도 2개의 수산기를 갖는 폴리에테르계 폴리올로서 분자량 500-2000의 폴리카르포락톤 디올 및 폴리카보네이트 폴리올을 주로 사용하며, 또 다른 글리콜-아디핀산 등에 에스테르 폴리올이나 폴리에테르 폴리올을 50중량% 이하에서 병용하여 사용할 수 있는데, 50중량% 이상 사용되면 필름의 내가수분해성 및 내용제성이 저하되어 적당치 않다.The polyols used in the present invention mainly use polycarpolactone diols and polycarbonate polyols having a molecular weight of 500-2000 as polyether polyols having at least two hydroxyl groups in the compound, and ester polyols or polyols for further glycol-adipic acid and the like. The ether polyol may be used in combination at 50 wt% or less, but when used at 50 wt% or more, the hydrolysis resistance and solvent resistance of the film are lowered, which is not suitable.
본 발명에 사용되는 지방족 또는 지환족 디이소시아네이트는 비변색형으로써 이소프론 디이소시아네이트와 디시크로헥실메틸렌 -4,4'-디이소시아네이트이며 유연한 물성을 얻고자 할 경우에는 전자를, 딱딱한 물성을 얻고자 할 경우에는 후자를 사용하나 내수성, 내용제성, 내가수분해성 등의 물성이 요구될 때는 후자가 유리하다.The aliphatic or cycloaliphatic diisocyanate used in the present invention is a non-chromic type, and isoprene diisocyanate and dicyclohexylmethylene-4,4'-diisocyanate. When the latter is used, the latter is advantageous when physical properties such as water resistance, solvent resistance and hydrolysis resistance are required.
친수성기를 도입하기 위해 사용되는 카르복실기 말단 디올로는 디메틸올 프로피온산이 전체 폴리우레탄 중합체의 2.5-5.5중량%인 것인데 물성에 따라 유연한 필름에는 낮게, 딱딱한 필름에는 높게 조정하여 사용한다.As the carboxyl terminal diol used to introduce the hydrophilic group, dimethylol propionic acid is 2.5-5.5% by weight of the total polyurethane polymer, which is low for flexible films and high for rigid films.
이의 사용량이 2.5중량% 이하일 경우 수분산체의 안정성이 저하되며 5.5중량% 이상이면 수분산형이기보다 수용성에 가까워져 내수성이 저하된다.If the amount thereof is less than 2.5% by weight, the stability of the water dispersion is lowered. If the amount is more than 5.5% by weight, the water-soluble property is closer to water solubility than the water dispersion type.
중화제로서는 디메틸 아미노에탄올, N-메틸모르포린, 트리에틸아민 등의 제3급 아민을 사용하여 사용량은 폴리머의 카르복실기 당량으로 사용한다.As a neutralizing agent, tertiary amines, such as dimethyl amino ethanol, N-methylmorpholine, and triethylamine, are used, and the usage-amount is used as the carboxyl group equivalent of a polymer.
쇄연장제로는 폴리아민을 사용하는데 1급 또는 2급 아미노기를 2개 이상 함유하는 화합물로써 히드라진, 에틸렌, 디아민, 디에틸렌 트리아민, 디아미노헥산, 이소포론 디아만, 디시클로헥실메틸렌 디아민 등을 단독 또는 병용하여 사용한다.As a chain extender, a polyamine is used, and a compound containing two or more primary or secondary amino groups is hydrazine, ethylene, diamine, diethylene triamine, diaminohexane, isophorone diaman, dicyclohexyl methylene diamine, and the like. Or use in combination.
프로폴리머의 쇄연장 및 유화는 프리폴리머를 중화제로 중화시킨 후 교반하면서 물을 가해 유화시키고 쇄연장제를 투입하여 60℃에서 3시간 더 교반시켜 쇄연장을 행한다.Chain extension and emulsification of the propolymer are neutralized with a neutralizing agent, and then emulsified by adding water while stirring, and chain extension is performed by stirring the chain extender for 3 hours at 60 ° C.
쇄연장이 끝난 후 용제를 감압 제거하여 고형분농도 40-50%의 안정성 및 물성이 우수한 폴리우레탄 수분산체를 얻는다.After completion of the chain extension, the solvent is removed under reduced pressure to obtain a polyurethane water dispersion having excellent stability and physical properties with a solid concentration of 40-50%.
이하 본 발명을 실시예를 들어 상세히 설명하는 바 본 발명이 실시예에 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail with reference to Examples. However, the present invention is not limited to Examples.
[실시예 1]Example 1
분자량 530의 폴리카프로락톤디올 60중량부, 분자량 1000의 폴리부틸렌 아디페이트 40중량부, 디메틸올 프로피온산 11.0중량부, H12MDI 91.7중량부 및 촉매로 틴옥토에이트 0.23중량부를 가하여 80℃에서 2시간 반응시켜 카르복실기 말단 NCO형 폴리우레탄 프리폴리머를 제조한다.60 parts by weight of polycaprolactonediol having a molecular weight of 530, 40 parts by weight of polybutylene adipate having a molecular weight of 1000, 11.0 parts by weight of dimethylol propionic acid, 91.7 parts by weight of H 12 MDI, and 0.23 parts of tin octoate with a catalyst were added at 80 캜. Reaction is performed to prepare a carboxyl group-terminated NCO-type polyurethane prepolymer.
제조된 폴리우레탄 프리폴리머를 실온으로 냉각시킨 후 트리에틸아민 8.2중량부를 가하여 중화시킨다.The prepared polyurethane prepolymer is cooled to room temperature and neutralized by adding 8.2 parts by weight of triethylamine.
중화된 프리폴리머를 빠르게 교반하면서 물 345중량부를 가하여 프리폴리머의 수분산물을 얻는다.345 parts by weight of water is added with rapid stirring of the neutralized prepolymer to obtain an aqueous dispersion of the prepolymer.
다음, 이소포론 디아민 18.86중량부를 적가한 후 온도를 60℃로 승온하고 3시간 동안 교반하여 쇄연장 반응을 행한다.Next, after dropwise adding 18.86 parts by weight of isophorone diamine, the temperature is raised to 60 ° C and stirred for 3 hours to carry out a chain extension reaction.
쇄연장 후 감압증류로 용제를 제거하여 고형분농도 40%의 경도가 높은 형태의 폴리우레탄 수분산체를 얻는다.After chain extension, the solvent is removed by distillation under reduced pressure to obtain a polyurethane water dispersion having a high hardness with a solid concentration of 40%.
[실시예 2]Example 2
분자량 2000의 폴리카프로락톤디올 100중량부, 디메틸올 프로피온산 4.42중량부, H12MDI 31.44중량부 및 촉매로 틴옥토에이트 0.15중량부를 가하여 80℃에서 2시간 반응시켜 카르복실기 말단 NCO형 폴리우레탄 프리폴리머를 제조한다.100 parts by weight of polycaprolactone diol having a molecular weight of 2000, 4.42 parts by weight of dimethylol propionic acid, 31.44 parts by weight of H 12 MDI and 0.15 parts by weight of tinoctoate were added and reacted at 80 ° C. for 2 hours to prepare a carboxyl-terminated NCO-type polyurethane prepolymer. do.
제조된 폴리우레탄 프리폴리머를 실온으로 냉각시킨 후 트리에틸아민 3.3중량부를 가하여 중화시킨다.The prepared polyurethane prepolymer is cooled to room temperature and neutralized by adding 3.3 parts by weight of triethylamine.
다음, 중화된 프리폴리머를 빠르게 교반하면서 물 218중량부를 가하여 프리폴리머의 수분산물을 얻는다.Next, 218 parts by weight of water is added with rapid stirring of the neutralized prepolymer to obtain an aqueous dispersion of the prepolymer.
다음, 이소포론 디아민 6.07중량부를 적한 후 온도를 60℃로 하고 3시간 동안 교반하여 쇄연장 반응을 행한다.Next, after dropping 6.07 parts by weight of isophorone diamine, the temperature was set to 60 ° C and stirred for 3 hours to carry out a chain extension reaction.
쇄연장 후 감압증류로 용제를 제거하여 고형분농도 40%의 폴리우레탄 수분산체를 얻는다.After chain extension, the solvent is removed by distillation under reduced pressure to obtain a polyurethane water dispersion having a solid concentration of 40%.
[실시예 3]Example 3
분자량 2000의 폴리카보네이트 폴리올 100중량부, 분자량 1000의 폴리에틸렌 글리콜 5.0중량부, 디메틸올 프로피온산 4.02중량부와 H12MDI 26.2중량부 및 촉매로 틴옥토에이트 0.14중량부를 가하여 80℃에서 2시간 반응시켜 카르복실기 말단 NCO형 폴리우레탄 프리폴리머를 제조한다.100 parts by weight of polycarbonate polyol having a molecular weight of 2000, 5.0 parts by weight of polyethylene glycol having a molecular weight of 1000, 4.02 parts by weight of dimethylol propionic acid, 26.2 parts by weight of H 12 MDI, and 0.14 parts of tin octoate with a catalyst and reacted at 80 ° C. for 2 hours. Prepare terminal NCO type polyurethane prepolymer.
제조된 폴리우레탄 프리폴리머를 실온으로 냉각시킨 후 트리에틸아민 3.0중량부를 가하여 중화시킨다.The prepared polyurethane prepolymer is cooled to room temperature and neutralized by adding 3.0 parts by weight of triethylamine.
중화된 프리폴리머를 빠르게 교반하면서 물 208중량부를 가하여 프리폴리머의 수분산물을 얻는다.208 parts by weight of water is added with rapid stirring of the neutralized prepolymer to obtain an aqueous dispersion of the prepolymer.
다음, 에틸렌디아민 0.9중량부를 적가한 후 온도를 60℃로 하고 3시간 동안 교반하여 쇄연장 반응을 행한다.Next, 0.9 weight part of ethylenediamines are added dropwise, and the temperature is 60 ° C., followed by stirring for 3 hours to perform a chain extension reaction.
쇄연장 후 감압증류로 용제를 제거하여 고형분 농도 40%의 폴리우레탄 수분산체를 얻는다.After chain extension, the solvent is removed by distillation under reduced pressure to obtain a polyurethane water dispersion having a solid concentration of 40%.
[실시예 4]Example 4
분자량 2000의 폴리카프로락톤디올 100중량부, 디메틸올 프로피온산 4.2중량부와 IPDI 25.3중량부 및 촉매로 틴옥토에이트 0.14중량부를 가하여 80℃에서 2시간 반응시켜 카르복실기 말단 NCO형 폴리우레탄 프리폴리머를 제조한다.100 parts by weight of polycaprolactonediol having a molecular weight of 2000, 4.2 parts by weight of dimethylol propionic acid, 25.3 parts by weight of IPDI, and 0.14 parts of tinoctoate were added thereto and reacted at 80 ° C. for 2 hours to prepare a carboxyl terminal NCO-type polyurethane prepolymer.
제조된 폴리우레탄 프리폴리머를 실온으로 냉각시킨 후 트리에틸아민 3.2중량부를 가하여 중화시킨다.The prepared polyurethane prepolymer is cooled to room temperature and neutralized by adding 3.2 parts by weight of triethylamine.
중화된 프리폴리머를 빠르게 교반하며너 물 207중량부를 가하여 프리폴리머의 수분산물을 얻는다.The neutralized prepolymer is rapidly stirred and 207 parts by weight of water are added to obtain an aqueous dispersion of the prepolymer.
다음, 이소포론 디아민 5.25중량부를 적한 후 온도를 60℃로 하여 3시간 동안 쇄연장 반응을 행한다.Next, 5.25 weight part of isophorone diamines are dripped, and chain extension reaction is performed for 3 hours at 60 degreeC.
쇄연장 후 감압증류로 용제를 제거하여 고형분농도 40%의 폴리우레탄 수분산체를 얻는다.After chain extension, the solvent is removed by distillation under reduced pressure to obtain a polyurethane water dispersion having a solid concentration of 40%.
[실시예 5]Example 5
분자량 2000의 폴리카프로락톤디올 100중량부, 분자량 1000의 폴리에틸렌글리콜 5.0중량부, 디메틸올 프로피온산 4.2중량부와 H12MDI 28.8중량부 및 틴옥토에이트 0.14중량부를 가하여 80℃에서 2시간 반응시켜 카르복실기 말단 NCO형 폴리우레탄 프리폴리머를 제조한다.100 parts by weight of polycaprolactonediol having a molecular weight of 2000, 5.0 parts by weight of polyethylene glycol having a molecular weight of 1000, 4.2 parts by weight of dimethylol propionic acid, 28.8 parts by weight of H 12 MDI and 0.14 parts by weight of tinoctoate were added and reacted at 80 ° C. for 2 hours to terminate the carboxyl group. Prepare an NCO type polyurethane prepolymer.
제조된 폴리우레탄 프리폴리머를 실온으로 냉각시킨 후 트리에틸아민 3.2중량부를 가하여 중화시킨다.The prepared polyurethane prepolymer is cooled to room temperature and neutralized by adding 3.2 parts by weight of triethylamine.
중화된 프리폴리머를 빠르게 교반하면서 물 214중량부를 가하여 프리폴리머의 수분산물을 얻는다.214 parts by weight of water is added with rapid stirring of the neutralized prepolymer to obtain an aqueous dispersion of the prepolymer.
다음, 에틸렌디아민 1.38중량부를 적가한 후 온도를 60℃로 하여 3시간 동안 쇄연장 반응을 행한다.Next, 1.38 parts by weight of ethylenediamine is added dropwise, followed by chain extension reaction at a temperature of 60 ° C. for 3 hours.
쇄연장 후 감압증류로 용제를 제거하여 고형분농도 40%의 폴리우레탄 수분산체를 얻는다.After chain extension, the solvent is removed by distillation under reduced pressure to obtain a polyurethane water dispersion having a solid concentration of 40%.
[비교예][Comparative Example]
5차례의 비교예로서는 기존의 제품을 물성이 유사한 등급으로 선택하여 필름 물성 및 내후성을 비교하였다.As five comparative examples, the conventional product was selected as a grade having similar properties to compare film properties and weather resistance.
[실험예]Experimental Example
상기 실시예 1-5와 5차례의 비교예는 다음과 같은 방법에 의해 수지필름의 물성 및 내후성을 비교하였다.In Comparative Examples 1 to 5 and five times, the physical properties and weather resistance of the resin film were compared by the following method.
-필름제작Film Production
수지플림의 물성을 측정하기 위해 샤아레에 필름의 최종두께가 0.5-1mm가 되도록 폴리우레탄 수분산체를 부어 55-60℃의 건조오븐에서 하루동안 건조시켰다.In order to measure the properties of the resin film, the polyurethane water dispersion was poured into the saare so that the final thickness of the film was 0.5-1 mm, and dried in a drying oven at 55-60 ° C. for one day.
-시편제작-Specimen production
건조된 필름을 KSM 6518 규격에 준하여 인장시험용 아령형 절단기를 사용하여 폭 10mm, 길이 20mm로 절단하여 물성측정에 사용하였다.The dried film was cut into a width of 10 mm and a length of 20 mm using a dumbbell-type cutter for tensile testing according to KSM 6518 standard, and used for measuring physical properties.
-물성측정Property measurement
제작된 시편필름 KSM 6518 규격에 준하여 만능인장 시험기(독일, Zwick 1435)를 사용하여 20mm/min의 인장속도로 100% 신장시의 인장응력 M100과 파단시의 강도 TS및 신장률 EB를 구하였다.Universal tensile testing machine in accordance with the production of the specimen film KSM 6518 standard intensity of the tensile stress M 100 and the fracture of the city (Germany, Zwick 1435) 100% at a tensile speed of 20mm / min by using the height T S and elongation obtain an E B It was.
-내가수분해성 시험Hydrolysis resistance test
제작된 필름을 실온에서 10% NaOH 수용액에 48시간 동안 침적시켜 가수분해를 촉진시킨 후 만능인장 시험기를 이용하여 필름물성을 측정하였다.The prepared film was immersed in a 10% aqueous NaOH solution for 48 hours at room temperature to promote hydrolysis, and then measured the physical properties of the film using a universal tensile tester.
-내광성 시험Light resistance test
제작된 필름을 24시간 동안 UV를 조사한 후 만능인장 시험기를 이용하여 필름물성을 측정하였다.The film was irradiated with UV for 24 hours, and then film properties were measured using a universal tensile tester.
-내용제성 시험Solvent resistance test
제작된 필름을 퍼클로에틸렌, 아세톤, 메틸에틸케톤, 에틸 아세테이트, 에탄올 및 물에 24시간 동안 침적시킨 후 각 용제별로 침적 전후의 필름 무게를 측정하여 용제함유량을 다음식에 따라 계산하여 중량%로 나타내었는데 수치가 적을 수록 내용성이 우수한 것으로 판단되었다.The produced film was immersed in perchlorethylene, acetone, methyl ethyl ketone, ethyl acetate, ethanol and water for 24 hours, and the weight of each solvent was measured by weight of the film before and after the deposition. The lower the value, the better the content was.
결과는 표 1에 나타내었다.The results are shown in Table 1.
[표 1]TABLE 1
폴리우레탄 수지 필름의 물성 및 내후성Physical properties and weather resistance of polyurethane resin film
*∞:필름형태소실 * ∞: Film loss
이상과 같이 본 발명인들은, 환경친화적인 요구에 부응하면서 내수성, 내용제성 등의 제반물성을 만족시킬 수 있는 수분산형 폴리우레탄 수지를 얻고자 연구 검토한 결과 폴리카프로락톤 디올 및 폴리카보네이트 폴리올을 주 폴리올로 사용하여 NCO/OH 비를 적절히 조절하고 폴리아민으로 쇄연장한 음이온성 자기유화형 폴리우레탄 수분산체를 제조함으로써 내후성 및 제반물성이 우수한 효과를 가진 피혁 코팅용 비변색 수분산형 폴리우레탄 코팅제를 얻을 수 있었다.As described above, the inventors of the present invention have conducted research and studies to obtain a water-dispersible polyurethane resin that can satisfy various physical properties such as water resistance and solvent resistance while meeting environmentally friendly demands. As a result, polycaprolactone diol and polycarbonate polyol are mainly used as polyols. By adjusting the NCO / OH ratio properly and manufacturing an anionic self-emulsifying polyurethane water dispersion chain extended with a polyamine can be used to obtain a non-discolored water-dispersible polyurethane coating for leather coating having excellent effects of weather resistance and various properties there was.
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| KR1019970047064A KR19990025438A (en) | 1997-09-08 | 1997-09-08 | Non-discoloration water-dispersion type polyurethane coating for leather coating |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019970047064A KR19990025438A (en) | 1997-09-08 | 1997-09-08 | Non-discoloration water-dispersion type polyurethane coating for leather coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100341870B1 (en) * | 2000-01-06 | 2002-06-24 | 김중현 | Process for preparing aqueous polyurethane |
| KR101281865B1 (en) * | 2012-02-16 | 2013-07-05 | 한국기술교육대학교 산학협력단 | Coating composition for leather |
-
1997
- 1997-09-08 KR KR1019970047064A patent/KR19990025438A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100341870B1 (en) * | 2000-01-06 | 2002-06-24 | 김중현 | Process for preparing aqueous polyurethane |
| KR101281865B1 (en) * | 2012-02-16 | 2013-07-05 | 한국기술교육대학교 산학협력단 | Coating composition for leather |
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