Epoxy resin modified by isocyanate terminated silicon rubber 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 technology for terminating isocyanate and epoxy resin, applied in the field of modified epoxy resin and its preparation, can solve the problems of limited application, poor impact performance, low toughness and the like
Active Publication Date: 2009-12-02
大岩(上海)建筑材料有限公司
View PDF0 Cites 8 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
However, the cured epoxy resin has high brittleness, low toughness and poor impact performance, which limits its application in impact-resistant flooring and some electronic and electrical fields.
The toughening method of epoxy resin is generally to add thermoplastic resin, the effect is that the impact strength of epoxy resin cured product will be improved, but the tensile strength will decrease, so its application has limitations
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
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0027] A kind of isocyanate-terminated silicone rubber modified epoxy resin, its composition is as follows by weight parts:
[0028] Isocyanate-terminated silicone rubber 19 parts
[0029] Epoxy resin E-51 78 parts
[0030] Mixture of organotin and triethylamine 0.05 part
[0031] Wherein said isocyanate-terminated silicone rubber, its composition is as follows in parts by weight:
[0032] Silicone rubber 108 90 parts
[0033] 2 parts toluene diisocyanate
[0034] Mixture of organotin and triethylamine 0.05 part
[0035] Preparation of a kind of isocyanate-terminated silicone rubber modified epoxy resin
[0036] (1), preparation of isocyanate-terminated silicone rubber
[0037] Stir and dehydrate 90 parts of hydroxyl-terminated silicone rubber at 110°C and a vacuum of 700mmHg for 0.8h, add 3 parts of toluene diisocyanate and 0.05 part of catalyst under nitrogen protection, react at 82°C for 2.5h, and then vacuum defoam to obtain the terminated isocyanate Silicone Rubber...
Embodiment 2
[0041] A kind of isocyanate-terminated silicone rubber modified epoxy resin, its composition is as follows by weight parts:
[0042] Isocyanate-terminated silicone rubber 18 parts
[0043] Mixture of epoxy resin E-44 and E-51 80 parts
[0044] Stannous octoate 0.07 parts
[0045] Wherein said isocyanate-terminated silicone rubber, its composition is as follows in parts by weight:
[0046] Mixture of silicone rubber 108 and 107 120 parts
[0047] 4 parts toluene diisocyanate
[0048] Stannous octoate 0.09 parts
[0049] Preparation of a kind of isocyanate-terminated silicone rubber modified epoxy resin
[0050] (1), preparation of isocyanate-terminated silicone rubber
[0051] Stir and dehydrate 120 parts of hydroxyl-terminated silicone rubber at 105°C and a vacuum of 730mmHg for 1 hour, add 4 parts of toluene diisocyanate and 0.09 part of catalyst under nitrogen protection, react at 80°C for 3 hours, and then vacuum defoam to obtain isocyanate-terminated silicon rubber....
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
Login to view more
Abstract
The invention discloses epoxy resin modified by isocyanate terminated silicon rubber and a preparation method thereof. The epoxy resin modified by the isocyanate terminated silicon rubber consists of the isocyanate terminated silicon rubber, epoxy resin and a catalyst, wherein the isocyanate terminated silicon rubber consists of silicon rubber with end hydroxyl group, toluene di-isocyanate and a catalyst. The preparation method for the epoxy resin modified by the isocyanate terminated silicon rubber comprises two steps of preparing the isocyanate terminated silicon rubber and preparing the epoxy resin modified by the isocyanate terminated silicon rubber. In the preparing process, the flexible isocyanate terminated silicon rubber is compounded with the epoxy resin to increase the toughness of the epoxy resin, and simultaneously hydroxyl group on the epoxy resin is chemically bonded with isocyanate group on the isocyanate terminated silicon rubber to increase the tensile strength of the epoxy resin, so the impact strength and the tensile strength of the epoxy resin modified by the isocyanate terminated silicon rubber are all obviously improved compared with those of common epoxy resin under the same curing condition.
Description
technical field [0001] The invention relates to a modified epoxy resin and a preparation method thereof, in particular to an isocyanate-terminated silicone rubber modified epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resin is an important class of thermosetting resins, which are widely used in adhesives, coatings, electrical and electronic insulation materials, reinforcing materials and advanced composite materials. However, the general epoxy resin cured product has high brittleness, low toughness and poor impact performance, which limits its application in impact-resistant flooring and some electronic and electrical fields. The toughening method of epoxy resin is generally to add thermoplastic resin. The effect is that the impact strength of the cured epoxy resin is improved, but the tensile strength will be reduced, which limits its application. Contents of the invention [0003] One of object of the present invention provides a kind...
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 
Login to view more