The key role of polyurethane catalysts in the production of spray foam insulation materials

Ụkpụrụ mmepụta nke ihe mkpuchi ụfụfụ ịgba

Mkpuchi Ụfụfụ nke a na-akpọ Spray Foam Insulation (SPF) bụ ihe e ji eme ka ihe dị n'ime mmiri abụọ a dị elu nke e ji agwakọta ihe ndị dị mkpa - polyol resin na isocyanate. Mgbe agwakọtara ihe abụọ a dị n'ime mmiri mmiri n'ime ngwaọrụ pụrụ iche nke a na-agba mmiri, mmeghachi omume kemịkalụ ngwa ngwa na-eme n'okpuru ọrụ nke ihe na-akpali akpali, a na-ewepụtakwa gas carbon dioxide n'otu oge, na-eme ka ngwakọta ahụ gbasaa ugboro 30-60 n'ime sekọnd 10-15, na-emesịa mepụta ụfụfụ polyurethane nwere ihe mkpuchi okpomọkụ dị mma.
Usoro kemịkalụ a nwere mmeghachi omume abụọ dị mkpa:
1. Mmeghachi omume jel: isocyanate na-emeghachi omume na polyol iji mepụta ọkpụkpụ polyurethane polymer
2. Mmeghachi omume ụfụfụ: isocyanate na-emeghachi omume na mmiri iji mepụta gas carbon dioxide

Arụmọrụ dị mma nkeMXC-BDMAihe mkpali

MXC-BDMA anyị (N,N-dimethylbenzylamine, CAS 103-83-3) bụ ihe na-eme ka amine dị ike nke na-eme ka ọ dị mma maka ụfụfụ siri ike, yana uru ndị a dị mkpa:

1. Njikwa mmeghachi omume kpọmkwem

- Na-enye nguzozi zuru oke nke mmeghachi omume ụfụfụ/gelling (oke mmeghachi omume nwere ike ịbụ ihe ziri ezi na ± 3%)
- Na-eme ka usoro na-arị elu kwụsiri ike (nhazi elu mgbasa <5%)
- Na-agbanwe okpomọkụ na iru mmiri dị iche iche (arụmọrụ kwụsiri ike n'etiti 5-35℃)

2. Mma ụfụfụ dị mma

- Na-emepụta otu nhazi mkpụrụ ndụ mechiri emechi (nhazi mkpụrụ ndụ mechiri emechi> 90%)
- A na-achịkwa dayameta sel n'ime oke kachasị mma nke 100-300μm
- Na-eme ka ike njikọ na substrate dịkwuo elu site na 40% (nnwale ASTM D1623)

3. Uru usoro

- Na-eme ka mmiri mbụ dị elu site na 25%, na-eme ka e jupụta ihe owuwu dị mgbagwoju anya zuru oke
- Oge ọgwụgwọ ahụ na-ebelata site na 15-20%, nke na-eme ka arụmọrụ owuwu dịkwuo mma.
- Usoro isi dị ala (VOC <50μg/m³) na-eme ka gburugburu ebe ọrụ ka mma.

Ọrụ dị mkpa nkeihe mkpalina mmepụta SPF.

Dịka "onye na-eduzi mmeghachi omume" nke mmepụta polyurethane, usoro ihe mkpali na-eme ka e nwee ụfụfụ dị elu site na usoro atọ:
1. Iwu Kinetic:
- chịkwaa oge mmalite mmeghachi omume nke ọma (na-abụkarị sekọnd 15-30)
- Hazie oke okpomọkụ exothermic kachasị elu (a na-achịkwa ya na 140-160℃)
- Nhazi nke mmepụta gas na ọnụego ọgwụgwọ polymer
2. Nhazi nhazi:
- Ihe ndị na-akpali Amine (dịka MXC-BDMA) na-achịkwa mmepụta gas
- Ihe na-akpali ígwè (dị ka octoate stannous) na-achịkwa njikọ polymer
- Ojiji nke ihe mejupụtara nwere ike nweta nhazi oghere zuru oke
3. Mmelite arụmọrụ:
- Meziwanye nkwụsi ike nha (ọkwa mgbanwe olu <1%)
- Mee ka ike okpomọkụ dịkwuo mma (ruo 0.020-0.028W/m·K)
- Ike igwe emelitere (ike mkpakọ> 150kPa)

Ngwọta ngwa ụlọ ọrụ

MXC-BDMA dabara adaba karịsịa maka mmepụta ụfụfụ ịgba n'ebe ndị a:

Mkpuchi ụlọ

- Sistemụ mkpuchi mgbidi dị n'èzí
- Okpokoro mkpuchi mmiri mmiri nke ụlọ
- Ọrụ mkpuchi nchekwa oyi

Ngwa ọrụ mmepụta ihe

- Jaketị mkpuchi ọkpọkọ
- Nchedo mkpuchi tankị
- Mkpuchi akụrụngwa usoro

Gburugburu pụrụ iche

- Ọdịdị gburugburu ebe obibi dị ala (dị ka ala 5℃)
- Ngwa n'ebe oke iru mmiri dị elu (RH> 80%)
- Ịgbanye elu kwụ ọtọ na elu ụlọ

Nkwado teknụzụ ọkachamara

Anyị na-enye ndị nrụpụta ụfụfụ ịgba mmiri:
- Ọrụ nhazi usoro: Hazie sistemụ katalytic dịka paramita akụrụngwa gị si dị
- Nchọpụta usoro: Dozie nsogbu ndị a na-ahụkarị dịka mkpụkọ ụfụfụ na mgbawa
- Nnwale ihe nlele: Nye ngwugwu nnwale 50-100g maka obere ule
- Ọzụzụ teknụzụ: Na-eme nzukọ ọmụmụ teknụzụ mmepụta SPF mgbe niile