摘要:
According to a disclosed method for manufacturing aqueous polyurethane, a polyol mixture including first polyester polyol obtained by reacting 1,4-butanediol with adipic acid is obtained and polyurethane prepolymer is obtained by reacting ionic carboxylic acid with diisocyanate. Polyurethane resin is obtained by neutralizing the polyurethane prepolymer. Aqueous polyurethane resin is obtained by adding water to the polyurethane resin and mixing the water and the polyurethane resin. The molar fraction of the first polyester polyol against the polyol mixture is 0.15 to 0.6. [Reference numerals] (S10) Obtain polyurethane prepolymer;(S20) Obtain polyurethane resin by neutralizing the polyurethane prepolymer;(S30) Produce aqueous polyurethane resin by adding water to the polyurethane resin and mixing the water and the polyurethane resin
摘要:
PURPOSE: An oil curing type rapid hardening polyurea spray composition is provided to inhibit quick-hardening reactions of polyurea by minimizing use of a chain extender such as D.E.T.D.A (Diethyl Toluene Diamine), to delay a part of the quick-hardening reactions by using methylene bi-oxychloroaniline, and to attain excellent properties of the polyurea. CONSTITUTION: An oil curing type rapid hardening polyurea spray composition comprises 1:1 of a prepolymer solution [A] and an amine mixture [B] by volume. The prepolymer solution [A] comprises methylene diphenyl diisocyanate prepolymers. The amine mixture [B] comprises an amine compound forming urea bond inside molecules by reacting with the solution [A]. The amine mixture [B] contains 2-8 weight percent of methylene bis-oxychloroaniline about 100 weight percent of the solution [B]. A NCO content of the methylene diphenyl diisocyanate is 12-14%. The amine mixture [B] comprises 20-23 weight percent of a chain extender compound, 71-75 weight percent of a polyol compound, 0.4-2 weight percent of a plasticizer compound, 2-4 weight percent of a pigment compound, and 0.2-0.3 weight percent of an adhesion promoter compound on the basis of total weight of the solution [B].
摘要:
An adhesive for a laminated steel plate is provided to ensure excellent adhesion and storage stability. An adhesive for a laminated steel plate comprises a polyester-polyurethane resin, a block isocyanate, and a silicon compound. A method for preparing the adhesive for a laminated steel plate includes the steps of: polymerizing an aromatic dibasic acid compound, an aliphatic dibasic acid compound, and glycol to form polyester; reacting the polyester with isocyanate to form a polyester-polyurethane resin; and adding a block isocyanate and a silicon compound to the polyester-polyurethane resin.
摘要:
건물의 노출용 또는 비노출용 복합 방수층 구조 및 그 시공방법이 개시되어 있다. 상기 복합 방수층 구조는 프라이머층, 상기 프라이머층 상의 수지층, 상기 수지층 상의 합성피혁층, 상기 합성피혁층 상의 상부 도막층을 포함하며, 노출용으로 사용할 경우, 상기 상부 도막층 상에 탑코팅층을 더 포함하고, 비노출용으로 사용할 경우, 상기 상부 도막층 상의 폴리에틸렌 필름층 및 상기 폴리에틸렌 필름층 상의 보호 몰탈층을 더 포함한다. 상기 복합 방수층 구조를 바닥공법에 적용 시, 종래의 바닥공법이 구조적으로 안고 있는 부풀음 발생 문제, 도막의 불균일성, 내균열성 저하 등의 결점을 해결할 수 있으며, 공사기간을 획기적으로 단축할 수 있다. 방수, 합성피혁, 바닥