폴리우레탄 중합체
|
|
폴리우레탄 중합체 속성
- 안정성
- 안정적인. 타기 쉬운. 강한 산화제와 호환되지 않습니다.
- InChI
- InChI=1S/C3H8N2O/c1-2-5-3(4)6/h2H2,1H3,(H3,4,5,6)
- InChIKey
- RYECOJGRJDOGPP-UHFFFAOYSA-N
- SMILES
- N(CC)C(N)=O
- CAS 데이터베이스
- 9009-54-5
- IARC
- 3 (Vol. 19, Sup 7) 1987
안전
폴리우레탄 중합체 C화학적 특성, 용도, 생산
화학적 성질
Polyurethane foams are resistant to a wide range of solvents. In this respect, polyester foams are generally superior to polyether foams, particularly in resistance to dry cleaning solvents. Polyurethane foams are subject to degradation by aqueous acids and alkalis and steam. Ester, amide and urethane groups represent sites for hydrolytic attack. Since the ether group is not readily attacked, polyether foams are generally more resistant to hydrolysis than polyester foams.용도
Flexible polyurethane foams are open-cell structures which are usually produced with densities in the range 24-48 kg/m3 (1.5-3Ib/ft3). The major interest in flexible foams is for upholstery applications and thus the loadcompression characteristics are of importance.제조 방법
Polyurethane foams are produced by forming a polyurethane polymer concurrently with a gas evolution process. Provided these two processes are balanced, bubbles of gas are trapped in the polymer matrix as it is formed and a cellular product results. The matching of the two reactions is essential for the formation of satisfactory foams. If the evolution of gas is too rapid, the foam initially rises well but then collapses because polymerization has not proceeded sufficiently to give a matrix strong enough to retain the gas. If polymerization is too fast, the foam does not rise adequately.By selection of appropriate reactants, it is possible to prepare foams of varying degrees of cross-linking. Slightly cross-linked products are flexible whilst highly cross-linked products are rigid. Both flexible and rigid polyurethane foams are of commercial importance.
생산 방법
Castable polyurethane elastomers are fabricated from polyurethane prepolymers, which are obtained by reacting an excess of diisocyanate with high-molecular-weight diols. These NCO-terminated oligomers (prepolymers) are commercially available under a variety of trade names and in numerous types depending upon the types of diisocyanates and polyols that are used to synthesize them. The NCO content of these prepolymers can vary from less than 3% to as much as 20%. A cast polyurethane fabricator mixes these liquid prepolymers with approximately stoichiometric quantities of a curing agent (or a blend of curing agents) such as an appropriate low-molecular- weight diol or diamine.Generally a prepolymer is heated to reduce its viscosity before mixing it with a liquid or a molten curing agent. The prepolymer curing agent blends have a limited working time (pot life) during which they are still liquid and can be poured into molds. The liquid prepolymer/curing agent blend is degassed and then poured into molds, which are often heated to expedite curing. After curing, the solid polyurethane elastomer articles are removed from the mold and are sometimes finished by keeping them at elevated temperature to complete the cure and to maximize mechanical properties.
위험도
Evolves toxic fumes on ignition.Safety Profile
Questionable carcinogen with experimental tumorigenic data. When heated to decomposition it emits acrid toxic fumes of CNand NOx.참고 문헌
[1] Sonnenschein, M. “INTRODUCTION TO POLYURETHANE CHEMISTRY.” 2014. 0.폴리우레탄 중합체 준비 용품 및 원자재
원자재
아디핀산
PolyesterPolyol
폴리프로필렌 글리콜 에틸렌 산화물 중합체
N,N-다이메틸폼아마이드
트리메틸롤프로판
1,6-헥산디올
1,4-부탄디올
메틸에틸케톤
식물성 기름
글리세린
DOYLEDIRHODIUM촉매-RH2(4S-MEOX)4
아세트산부틸
4,4′-메틸렌 비스(페닐 이소시아네이트)(고체)
사이클로헥사논
SURFACTANT
톨루엔 디이소시안산 (혼합 이성질체)
준비 용품
폴리우레탄 중합체 공급 업체
글로벌( 52)공급 업체
공급자 | 전화 | 이메일 | 국가 | 제품 수 | 이점 |
---|---|---|---|---|---|
Leading Chemical and Trading Co.,Ltd | +8615669938129 |
sales@leadingchemical.com | China | 130 | 58 |
Hebei Mojin Biotechnology Co., Ltd | +86 13288715578 +8613288715578 |
sales@hbmojin.com | China | 12446 | 58 |
Hebei Yanxi Chemical Co., Ltd. | +8617531190177 |
peter@yan-xi.com | China | 5873 | 58 |
Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 |
info@tianfuchem.com | China | 21667 | 55 |
Cangzhou Wanyou New Material Technology Co.,Ltd | 18631714998 |
sales@czwytech.com | CHINA | 906 | 58 |
Hubei xin bonus chemical co. LTD | 86-13657291602 |
linda@hubeijusheng.com | CHINA | 22968 | 58 |
Shandong chuangyingchemical Co., Ltd. | 18853181302 |
sale@chuangyingchem.com | CHINA | 5909 | 58 |
Chongqing Chemdad Co., Ltd | +86-023-6139-8061 +86-86-13650506873 |
sales@chemdad.com | China | 39916 | 58 |
SIMAGCHEM CORP | +86-13806087780 |
sale@simagchem.com | China | 17367 | 58 |
Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418671 +8618949823763 |
sales@tnjchem.com | China | 34571 | 58 |
폴리우레탄 중합체 관련 검색:
아세틸아세토산 제2철 알루미늄 아세틸아세토네이트 디스프로슘 트리(2,2,6,6-테트라메틸-3,5-헵탄디오네이트) 아세틸아세톤산 구리 실버 아세틸아세토네이트 코발트(II) 아세틸아세토네이트 하이드레이트
N-BUTYLISOCYANIDE
Tosylmethyl isocyanide
TRIS(2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATO)EUROPIUM(III)
DICHLORO(ETHYLENEDIAMINE)PLATINUM(II)
TERT-BUTYL ISOCYANIDE
SALCOMINE
PHENYLSELENOL
Benzyl isocyanide
METHYL ISOCYANOACETATE
Tris(2,4-pentanedionato)chroMiuM(III)
1,1,3,3-TETRAMETHYLBUTYL ISOCYANIDE
Ethyl isocyanoacetate