Unlock instant, AI-driven research and patent intelligence for your innovation.
Polyurethane composite catalyst, solvent-free polyurethane resin and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A composite catalyst and polyurethane resin technology, applied in textiles, papermaking, coating, etc., can solve problems such as short operation time, slow curing speed, inoperability, etc., to get rid of dependence on large and expensive equipment, prolong reaction time, and improve curing speed effect
Active Publication Date: 2022-05-03
ZHEJIANG HUAFON SYNTHETIC RESIN
View PDF18 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
On the one hand, if the product itself wants to be matured quickly, a large amount of catalyst needs to be added, but if the amount of catalyst added is too high, the early operation time is very short and cannot be operated; if the amount of catalyst added is small, although the early operation time can be extended, the later curing The speed will be severely reduced, the polymerization reaction will be affected, and the molecular weight cannot reach the level of high molecular weight, so it will affect the surface effect or physical properties of the product such as peel strength, tensile strength, wear resistance, scratch resistance, etc.
On the other hand, even if the catalyst is added in an appropriate amount, it is still difficult to directly use low-efficiency manual mixing and recoating due to the presence of the catalyst, which relies heavily on special mixing equipment and requires equipment to accurately measure the two components, and the initial cost is high. The operation of the equipment is cumbersome, which has become one of the main reasons that restrict many polyurethane synthetic leather manufacturers from transforming into environmentally friendly products
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0045] According to an embodiment, the preparation method of polyurethane of the present invention may comprise the following steps:
[0046] Hydroxyl component: Add polyether polyol and chain extender into the reaction vessel, stir evenly above the melting point, and seal it for storage;
[0047] Active isocyanate component: Stir the isocyanate above the melting point evenly, then put in the required polyether polyol, and react under the conditions above the melting point of the reactants, and keep the NCO mass content at 8-20%, and keep it sealed;
[0048] Among them, in the step of preparing the hydroxyl component, foaming agents, foam stabilizers, and other conventional auxiliary agents in this field can be added. The foaming agent has a foaming effect, and the foam stabilizer acts as a uniform foam. There are no special requirements for the amount of foaming agent, foam stabilizer, and additives to improve the aging resistance and hydrolysis resistance of the material, as...
Embodiment 1
[0076] Preparation of polyurethane resin:
[0077] Hydroxyl component: Add 100 parts by weight of polyether polyol A2 and 4.5 parts by weight of diethylene glycol into the reaction vessel, stir evenly at 50°C, then add 1.5 parts by weight of polyurethane composite catalyst 2, and seal and store;
[0078] Active isocyanate component: Stir 100 parts by weight of liquefied MDI evenly at 50°C, then put in 80 parts by weight of polyether polyol B1 and 0.1 part by weight of phosphoric acid, and react at 80°C until the mass content of NCO is kept at 12 %, sealed and preserved.
Embodiment 2
[0080] Preparation of polyurethane resin:
[0081] Hydroxyl component: Add 100 parts by weight of polyether polyol A3 and 3 parts by weight of ethylene glycol into the reaction vessel, stir evenly at 45°C, and store in a sealed container;
[0082] Reactive isocyanate component: Stir 100 parts by weight of liquefied MDI at 60°C evenly, then put in 60 parts by weight of polyether polyol B3 and 0.05 part by weight of phosphoric acid, and react at 85°C until the mass content of NCO is kept at 17 %, sealed and preserved;
[0083] Wherein, the polyurethane composite catalyst 1 is added in an amount of 1.8 parts by weight, and is sealed and stored separately.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
particle diameter
aaaaa
aaaaa
thickness
aaaaa
aaaaa
melting point
aaaaa
aaaaa
Login to View More
Abstract
The invention relates to a polyurethane composite catalyst and its solvent-free polyurethane resin and its preparation method. The polyurethane composite catalyst is a core-shell type particulate structure, the biopolymer material is a shell material, a tertiary amine catalyst and / or an organometallic catalyst It is a core material; the particle size of the composite catalyst is 15-45 μm, and the thickness of the shell is 5-15 μm; the solvent-free polyurethane resin containing the polyurethane composite catalyst includes a hydroxyl component and an active isocyanate component; the hydroxyl group Parts include the following parts by weight: 100 parts of polyether polyol A; 3-15 parts of chain extender; the active isocyanate component includes the following parts by weight: 50-150 parts of polyether polyol B; The composite catalyst has the advantage of controllable catalytic effect, and the polyurethane product prepared by using the catalyst is applied in the field of synthetic leather.
Description
technical field [0001] The invention relates to a polyurethane composite catalyst, and also relates to a polyurethane resin containing the catalyst and a preparation method thereof, belonging to the technical field of polyurethane resin preparation. Background technique [0002] With the gradual strengthening of environmental protection awareness at home and abroad, in recent years, my country has promulgated more laws and regulations related to environmental protection, and relevant departments have also stepped up efforts to rectify enterprises that cause major environmental pollution. Traditional solvent-based polyurethane synthetic leather is due to There is a large amount of volatile organic solvents, which not only increases the cost of production energy consumption, but also causes irreversible damage to the environment and the health of production operators. Therefore, solvent-free and environmentally friendly polyurethane resins have attracted more and more attention...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More